Computerized tomography detector

Abstract

Provided herein is technology relating to medical imaging and particularly, but not exclusively, to a photon detector for computerized tomography, methods of using the photon detector for computerized tomography, and systems comprising the photon detector for computerized tomography. The photon detector comprises multiple subarrays of detector elements and optionally comprises movable subarrays of detector elements.

Description

[0001]ASTO-39600.601 COMPUTERIZED TOMOGRAPHY DETECTOR CROSS-REFERENCE TO RELATED APPLICATION This application claims the benefit of U.S. Provisional Patent Application No. 63 / 679,356 filed August 5, 2024, which is incorporated by reference herein in its entirety. FIELD Provided herein is technology relating to medical imaging and particularly, but not exclusively, to a detector for computerized tomography, methods of using the detector for computerized tomography, and systems comprising the detector for computerized tomography. BACKGROUND Computerized tomography (CT) scanners are expensive. In particular, the highest costs are associated with high efficiency CT detectors and accurately constructed anti-scatter grids placed between the detectors and the imaging x-ray source. Accordingly, improved CT scanning technologies are needed to reduce the cost of CT scanners to increase the installation base of CT scanners and provide more patient access to CT scanners for diagnosis and treatment of disease. SUMMARY Accordingly, in some embodiments, provided herein is a photon detector. In some embodiments, the photon detector is an x-ray detector. In some embodiments, the detector is a computerized tomography detector (CT detector). In some embodiments, the CT detector has fewer detectors and / or anti-scatter grids than conventional CT detectors but produces CT images with similar size and quality as conventional CT detectors. In particular, the CT detector technology described herein provides a CT detector comprising a smaller number of detector modules relative to conventional CT detectors. In some embodiments, the CT detector described herein produces images that are as informative as images produced by CT using conventional CT detectors. The CT detector described herein comprises less material than conventional CT detectors and thus reduces the cost of a CT scanner comprising the CT detector described herein. In some embodiments, the CT detector described herein is lighter than conventional CT ASTO-39600.601 detectors and thus a CT scanner comprising the CT detector described herein may be installed on a mobile platform to provide a mobile CT scanner. In some embodiments, data acquired by the CT detector described herein is transformed using software to provide the CT image. In particular, embodiments of the technology comprise methods (e.g., provided as software) that integrate information provided by the CT detector during successive rotations and / or passes of a helical scan to “fill in” the information missing from one or more other rotations (e.g., using the “pitch” between lateral portions of the CT detector, the sizes of the regions of the detector portions, and / or the relative positions of the regions of the detector portions). While a large detector may be desirable for some imaging, costs of large detectors are high. For instance, a detector module comprising a 16 × 32 pixel element array and supporting structures, electronics, read-out, and anti-scatter grid costs approximately $1000. Thus, a detector having 128 rows and providing a 60-cm diameter field of view would comprise approximately 480 detector modules and cost approximately $500,000. Reducing the number of rows and / or reducing the field of view of a detector would decrease the number of detector elements (e.g., detector modules) used to assemble the detector and thus lower the cost of the detector. For example, a detector having 128 rows and providing a 24-cm field of view would comprise approximately 96 detector modules and cost approximately $100,000 and a detector having 32 rows and a 60-cm field of view would comprise approximately 60 modules and cost approximately $60,000. Embodiments of the technology provided herein combine the advantages of a detector having many rows and a small field of view with the advantages of a detector having few rows and a wide field of view to provide a detector that produces images of comparable quality as a detector with many rows and a wide field of view but at a lower cost (e.g., comprising fewer detector elements (e.g., fewer detector modules)). For example, in some embodiments, the technology provides a photon detector comprising a first array of photon detector elements having R1 rows and C1 columns and a second array of photon detector elements having R2 rows and C2 columns, wherein C2 > C1 and R1 > R2. In some embodiments, a shared subarray of photon detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements. In some embodiments, R1 is equal to or greater than 100. In some embodiments, R2 is less than 50. In some embodiments, R1 is 64, 128, 160, 192, or 256; and / or R2 is 16 or 32. In some embodiments, the first array provides a field of view of approximately 10–50 cm (e.g., 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, ASTO-39600.601 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, or 60.0 cm) and the second array provides a field of view of approximately 50–200 cm (e.g., 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, 60.0, 60.5, 61.0, 61.5, 62.0, 62.5, 63.0, 63.5, 64.0, 64.5, 65.0, 65.5, 66.0, 66.5, 67.0, 67.5, 68.0, 68.5, 69.0, 69.5, 70.0, 70.5, 71.0, 71.5, 72.0, 72.5, 73.0, 73.5, 74.0, 74.5, 75.0, 75.5, 76.0, 76.5, 77.0, 77.5, 78.0, 78.5, 79.0, 79.5, 80.0, 80.5, 81.0, 81.5, 82.0, 82.5, 83.0, 83.5, 84.0, 84.5, 85.0, 85.5, 86.0, 86.5, 87.0, 87.5, 88.0, 88.5, 89.0, 89.5, 90.0, 90.5, 91.0, 91.5, 92.0, 92.5, 93.0, 93.5, 94.0, 94.5, 95.0, 95.5, 96.0, 96.5, 97.0, 97.5, 98.0, 98.5, 99.0, 99.5, 100.0, 100.5, 101.0, 101.5, 102.0, 102.5, 103.0, 103.5, 104.0, 104.5, 105.0, 105.5, 106.0, 106.5, 107.0, 107.5, 108.0, 108.5, 109.0, 109.5, 110.0, 110.5, 111.0, 111.5, 112.0, 112.5, 113.0, 113.5, 114.0, 114.5, 115.0, 115.5, 116.0, 116.5, 117.0, 117.5, 118.0, 118.5, 119.0, 119.5, 120.0, 120.5, 121.0, 121.5, 122.0, 122.5, 123.0, 123.5, 124.0, 124.5, 125.0, 125.5, 126.0, 126.5, 127.0, 127.5, 128.0, 128.5, 129.0, 129.5, 130.0, 130.5, 131.0, 131.5, 132.0, 132.5, 133.0, 133.5, 134.0, 134.5, 135.0, 135.5, 136.0, 136.5, 137.0, 137.5, 138.0, 138.5, 139.0, 139.5, 140.0, 140.5, 141.0, 141.5, 142.0, 142.5, 143.0, 143.5, 144.0, 144.5, 145.0, 145.5, 146.0, 146.5, 147.0, 147.5, 148.0, 148.5, 149.0, 149.5, 150.0, 150.5, 151.0, 151.5, 152.0, 152.5, 153.0, 153.5, 154.0, 154.5, 155.0, 155.5, 156.0, 156.5, 157.0, 157.5, 158.0, 158.5, 159.0, 159.5, 160.0, 160.5, 161.0, 161.5, 162.0, 162.5, 163.0, 163.5, 164.0, 164.5, 165.0, 165.5, 166.0, 166.5, 167.0, 167.5, 168.0, 168.5, 169.0, 169.5, 170.0, 170.5, 171.0, 171.5, 172.0, 172.5, 173.0, 173.5, 174.0, 174.5, 175.0, 175.5, 176.0, 176.5, 177.0, 177.5, 178.0, 178.5, 179.0, 179.5, 180.0, 180.5, 181.0, 181.5, 182.0, 182.5, 183.0, 183.5, 184.0, 184.5, 185.0, 185.5, 186.0, 186.5, 187.0, 187.5, 188.0, 188.5, 189.0, 189.5, 190.0, 190.5, 191.0, 191.5, 192.0, 192.5, 193.0, 193.5, 194.0, 194.5, 195.0, 195.5, 196.0, 196.5, 197.0, 197.5, 198.0, 198.5, 199.0, 199.5, 200.0, 200.5, 201.0, 201.5, 202.0, 202.5, 203.0, 203.5, 204.0, 204.5, 205.0, 205.5, 206.0, 206.5, 207.0, 207.5, 208.0, 208.5, 209.0, 209.5, 210.0, 210.5, 211.0, 211.5, 212.0, 212.5, 213.0, 213.5, 214.0, 214.5, 215.0, 215.5, 216.0, 216.5, 217.0, 217.5, 218.0, 218.5, 219.0, 219.5, 220.0, 220.5, 221.0, 221.5, 222.0, 222.5, 223.0, 223.5, 224.0, 224.5, 225.0, 225.5, 226.0, 226.5, 227.0, 227.5, 228.0, 228.5, 229.0, 229.5, 230.0, 230.5, 231.0, 231.5, 232.0, 232.5, 233.0, 233.5, 234.0, 234.5, 235.0, 235.5, 236.0, ASTO-39600.601 236.5, 237.0, 237.5, 238.0, 238.5, 239.0, 239.5, or 240.0 cm). In some embodiments, C2 = C1 × n, where n is a positive integer. In some embodiments, the photon detector is configurable. For example, in some embodiments, the photon detector comprises a movable subarray of photon detector elements. In some embodiments, the movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns. In some embodiments, the movable subarray of photon detector elements is configured to be movable from a first position to a second position. In some embodiments, the movable subarray of photon detector elements is configured to be movable by rotation of the movable subarray from a first position to a second position. In some embodiments, the movable subarray of photon detector elements is configured to be movable by rotation of the movable subarray around an axis of the movable subarray of photon detector elements. In some embodiments, the photon detector elements are x-ray detector elements. In some embodiments, the technology provides a photon detector comprising a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3. In some embodiments, R2 = R3 and / or C2 = C3. In some embodiments, a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by the first array of photon detector elements and the third array of photon detector elements. In some embodiments, R1 is equal to or greater than 100. In some embodiments, R2 and / or R3 is less than 50. In some embodiments, R1 is 64, 128, 160, 192, or 256; and / or R2 and / or R3 is 16 or 32. In some embodiments, the first array provides a field of view of approximately10–50 cm (e.g., 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, or 60.0 cm) and the combined field of view of the second array and the third array is approximately 50–200 cm (e.g., 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, ASTO-39600.601 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, 60.0, 60.5, 61.0, 61.5, 62.0, 62.5, 63.0, 63.5, 64.0, 64.5, 65.0, 65.5, 66.0, 66.5, 67.0, 67.5, 68.0, 68.5, 69.0, 69.5, 70.0, 70.5, 71.0, 71.5, 72.0, 72.5, 73.0, 73.5, 74.0, 74.5, 75.0, 75.5, 76.0, 76.5, 77.0, 77.5, 78.0, 78.5, 79.0, 79.5, 80.0, 80.5, 81.0, 81.5, 82.0, 82.5, 83.0, 83.5, 84.0, 84.5, 85.0, 85.5, 86.0, 86.5, 87.0, 87.5, 88.0, 88.5, 89.0, 89.5, 90.0, 90.5, 91.0, 91.5, 92.0, 92.5, 93.0, 93.5, 94.0, 94.5, 95.0, 95.5, 96.0, 96.5, 97.0, 97.5, 98.0, 98.5, 99.0, 99.5, 100.0, 100.5, 101.0, 101.5, 102.0, 102.5, 103.0, 103.5, 104.0, 104.5, 105.0, 105.5, 106.0, 106.5, 107.0, 107.5, 108.0, 108.5, 109.0, 109.5, 110.0, 110.5, 111.0, 111.5, 112.0, 112.5, 113.0, 113.5, 114.0, 114.5, 115.0, 115.5, 116.0, 116.5, 117.0, 117.5, 118.0, 118.5, 119.0, 119.5, 120.0, 120.5, 121.0, 121.5, 122.0, 122.5, 123.0, 123.5, 124.0, 124.5, 125.0, 125.5, 126.0, 126.5, 127.0, 127.5, 128.0, 128.5, 129.0, 129.5, 130.0, 130.5, 131.0, 131.5, 132.0, 132.5, 133.0, 133.5, 134.0, 134.5, 135.0, 135.5, 136.0, 136.5, 137.0, 137.5, 138.0, 138.5, 139.0, 139.5, 140.0, 140.5, 141.0, 141.5, 142.0, 142.5, 143.0, 143.5, 144.0, 144.5, 145.0, 145.5, 146.0, 146.5, 147.0, 147.5, 148.0, 148.5, 149.0, 149.5, 150.0, 150.5, 151.0, 151.5, 152.0, 152.5, 153.0, 153.5, 154.0, 154.5, 155.0, 155.5, 156.0, 156.5, 157.0, 157.5, 158.0, 158.5, 159.0, 159.5, 160.0, 160.5, 161.0, 161.5, 162.0, 162.5, 163.0, 163.5, 164.0, 164.5, 165.0, 165.5, 166.0, 166.5, 167.0, 167.5, 168.0, 168.5, 169.0, 169.5, 170.0, 170.5, 171.0, 171.5, 172.0, 172.5, 173.0, 173.5, 174.0, 174.5, 175.0, 175.5, 176.0, 176.5, 177.0, 177.5, 178.0, 178.5, 179.0, 179.5, 180.0, 180.5, 181.0, 181.5, 182.0, 182.5, 183.0, 183.5, 184.0, 184.5, 185.0, 185.5, 186.0, 186.5, 187.0, 187.5, 188.0, 188.5, 189.0, 189.5, 190.0, 190.5, 191.0, 191.5, 192.0, 192.5, 193.0, 193.5, 194.0, 194.5, 195.0, 195.5, 196.0, 196.5, 197.0, 197.5, 198.0, 198.5, 199.0, 199.5, 200.0, 200.5, 201.0, 201.5, 202.0, 202.5, 203.0, 203.5, 204.0, 204.5, 205.0, 205.5, 206.0, 206.5, 207.0, 207.5, 208.0, 208.5, 209.0, 209.5, 210.0, 210.5, 211.0, 211.5, 212.0, 212.5, 213.0, 213.5, 214.0, 214.5, 215.0, 215.5, 216.0, 216.5, 217.0, 217.5, 218.0, 218.5, 219.0, 219.5, 220.0, 220.5, 221.0, 221.5, 222.0, 222.5, 223.0, 223.5, 224.0, 224.5, 225.0, 225.5, 226.0, 226.5, 227.0, 227.5, 228.0, 228.5, 229.0, 229.5, 230.0, 230.5, 231.0, 231.5, 232.0, 232.5, 233.0, 233.5, 234.0, 234.5, 235.0, 235.5, 236.0, 236.5, 237.0, 237.5, 238.0, 238.5, 239.0, 239.5, or 240.0 cm). In some embodiments, C2 = C1 × n1 and / or C3 = C1 × n2, where each of n1 and n2 is a positive integer. In some embodiments, C2 = C3. In some embodiments, the photon detector is configurable. For example, in some embodiments, the photon detector comprises a movable subarray of photon detector elements. In some embodiments, the movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns and / or comprises R3 rows and (C3 – C1) columns. In some embodiments, the movable subarray of photon detector elements is ASTO-39600.601 configured to be movable from a first position to a second position. In some embodiments, the movable subarray of photon detector elements is configured to be movable by rotation of the movable subarray of photon detector elements from a first position to a second position. In some embodiments, the movable subarray of photon detector elements is configured to be movable by rotation of the movable subarray of photon detector elements around an axis of the movable subarray of photon detector elements. In some embodiments, the photon detector elements are x-ray detector elements. In some embodiments, the photon detector comprises a first movable subarray of photon detector elements and a second movable subarray of photon detector elements. In some embodiments, the first movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns and the second movable subarray of photon detector elements comprises R3 rows and (C3 – C1) columns. In some embodiments, the first movable subarray of photon detector elements is configured to be movable from a first position to a second position and the second movable subarray of photon detector elements is configured to be movable from a third position to a fourth position. In some embodiments, the first movable subarray of photon detector elements is configured to be movable by rotation of the first movable subarray from a first position to a second position and the second movable subarray of photon detector elements is configured to be movable by rotation of the second movable subarray from a third position to a fourth position. In some embodiments, the first movable subarray of photon detector elements is configured to be movable by rotation of the first movable subarray around a first axis of the first movable subarray of photon detector elements and the second movable subarray of photon detector elements is configured to be movable by rotation of the second movable subarray around a second axis of the second movable subarray of photon detector elements. In some embodiments, the photon detector elements are x-ray detector elements. In some embodiments, the technology provides a configurable photon detector configured to be transformable between a first configuration comprising photon detector elements and a second configuration comprising the photon detector elements. In some embodiments, the first configuration comprises a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3. In some embodiments, R2 = R3 and / or C2 = C3. In some embodiments, a first shared subarray of photon ASTO-39600.601 detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements; and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by the first array of photon detector elements and the third array of photon detector elements. In some embodiments, R1 is equal to or greater than 100. In some embodiments, R2 and / or R3 is less than 50. In some embodiments, R1 is 64, 128, 160, 192, or 256; and / or R2 and / or R3 is 16 or 32. In some embodiments, the first array provides a field of view of approximately 10–50 cm (e.g., 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, or 60.0 cm) and the combined field of view of the second array and the third array is approximately 50–200 cm (e.g., 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, 60.0, 60.5, 61.0, 61.5, 62.0, 62.5, 63.0, 63.5, 64.0, 64.5, 65.0, 65.5, 66.0, 66.5, 67.0, 67.5, 68.0, 68.5, 69.0, 69.5, 70.0, 70.5, 71.0, 71.5, 72.0, 72.5, 73.0, 73.5, 74.0, 74.5, 75.0, 75.5, 76.0, 76.5, 77.0, 77.5, 78.0, 78.5, 79.0, 79.5, 80.0, 80.5, 81.0, 81.5, 82.0, 82.5, 83.0, 83.5, 84.0, 84.5, 85.0, 85.5, 86.0, 86.5, 87.0, 87.5, 88.0, 88.5, 89.0, 89.5, 90.0, 90.5, 91.0, 91.5, 92.0, 92.5, 93.0, 93.5, 94.0, 94.5, 95.0, 95.5, 96.0, 96.5, 97.0, 97.5, 98.0, 98.5, 99.0, 99.5, 100.0, 100.5, 101.0, 101.5, 102.0, 102.5, 103.0, 103.5, 104.0, 104.5, 105.0, 105.5, 106.0, 106.5, 107.0, 107.5, 108.0, 108.5, 109.0, 109.5, 110.0, 110.5, 111.0, 111.5, 112.0, 112.5, 113.0, 113.5, 114.0, 114.5, 115.0, 115.5, 116.0, 116.5, 117.0, 117.5, 118.0, 118.5, 119.0, 119.5, 120.0, 120.5, 121.0, 121.5, 122.0, 122.5, 123.0, 123.5, 124.0, 124.5, 125.0, 125.5, 126.0, 126.5, 127.0, 127.5, 128.0, 128.5, 129.0, 129.5, 130.0, 130.5, 131.0, 131.5, 132.0, 132.5, 133.0, 133.5, 134.0, 134.5, 135.0, 135.5, 136.0, 136.5, 137.0, 137.5, 138.0, 138.5, 139.0, 139.5, 140.0, 140.5, 141.0, 141.5, 142.0, 142.5, 143.0, 143.5, 144.0, 144.5, 145.0, 145.5, 146.0, 146.5, 147.0, 147.5, 148.0, 148.5, 149.0, 149.5, 150.0, 150.5, 151.0, 151.5, 152.0, 152.5, 153.0, 153.5, 154.0, 154.5, 155.0, 155.5, 156.0, 156.5, 157.0, 157.5, 158.0, 158.5, 159.0, 159.5, 160.0, 160.5, 161.0, 161.5, 162.0, 162.5, 163.0, 163.5, 164.0, 164.5, 165.0, 165.5, 166.0, 166.5, 167.0, 167.5, 168.0, 168.5, 169.0, 169.5, 170.0, 170.5, 171.0, 171.5, 172.0, 172.5, 173.0, 173.5, 174.0, 174.5, 175.0, 175.5, 176.0, 176.5, 177.0, 177.5, 178.0, ASTO-39600.601 178.5, 179.0, 179.5, 180.0, 180.5, 181.0, 181.5, 182.0, 182.5, 183.0, 183.5, 184.0, 184.5, 185.0, 185.5, 186.0, 186.5, 187.0, 187.5, 188.0, 188.5, 189.0, 189.5, 190.0, 190.5, 191.0, 191.5, 192.0, 192.5, 193.0, 193.5, 194.0, 194.5, 195.0, 195.5, 196.0, 196.5, 197.0, 197.5, 198.0, 198.5, 199.0, 199.5, 200.0, 200.5, 201.0, 201.5, 202.0, 202.5, 203.0, 203.5, 204.0, 204.5, 205.0, 205.5, 206.0, 206.5, 207.0, 207.5, 208.0, 208.5, 209.0, 209.5, 210.0, 210.5, 211.0, 211.5, 212.0, 212.5, 213.0, 213.5, 214.0, 214.5, 215.0, 215.5, 216.0, 216.5, 217.0, 217.5, 218.0, 218.5, 219.0, 219.5, 220.0, 220.5, 221.0, 221.5, 222.0, 222.5, 223.0, 223.5, 224.0, 224.5, 225.0, 225.5, 226.0, 226.5, 227.0, 227.5, 228.0, 228.5, 229.0, 229.5, 230.0, 230.5, 231.0, 231.5, 232.0, 232.5, 233.0, 233.5, 234.0, 234.5, 235.0, 235.5, 236.0, 236.5, 237.0, 237.5, 238.0, 238.5, 239.0, 239.5, or 240.0 cm). In some embodiments, C2 = C1 × n1 and / or C3 = C1 × n2, where each of n1 and n2 is a positive integer. In some embodiments, C2 = C3. In some embodiments, the second configuration comprises a fourth array of the photon detector elements having R1 + (m1 × R2) + (m2 × R3) rows and C1 columns, wherein each of m1 and m2 is a positive integer. In some embodiments, ((C2 / C1) – 1)) = m1 = m2. In some embodiments, the fourth array provides a field of view of approximately 10–50 cm (e.g., 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0, 15.5, 16.0, 16.5, 17.0, 17.5, 18.0, 18.5, 19.0, 19.5, 20.0, 20.5, 21.0, 21.5, 22.0, 22.5, 23.0, 23.5, 24.0, 24.5, 25.0, 25.5, 26.0, 26.5, 27.0, 27.5, 28.0, 28.5, 29.0, 29.5, 30.0, 30.5, 31.0, 31.5, 32.0, 32.5, 33.0, 33.5, 34.0, 34.5, 35.0, 35.5, 36.0, 36.5, 37.0, 37.5, 38.0, 38.5, 39.0, 39.5, 40.0, 40.5, 41.0, 41.5, 42.0, 42.5, 43.0, 43.5, 44.0, 44.5, 45.0, 45.5, 46.0, 46.5, 47.0, 47.5, 48.0, 48.5, 49.0, 49.5, 50.0, 50.5, 51.0, 51.5, 52.0, 52.5, 53.0, 53.5, 54.0, 54.5, 55.0, 55.5, 56.0, 56.5, 57.0, 57.5, 58.0, 58.5, 59.0, 59.5, or 60.0 cm). In some embodiments, the configurable photon detector is transformable between the first configuration and the second configuration by transforming a first movable subarray of photon detector elements and transforming a second movable subarray of photon detector elements. In some embodiments, the configurable photon detector is transformable between the first configuration and the second configuration by rotating a first movable subarray of photon detector elements and rotating a second movable subarray of photon detector elements. In some embodiments, the first movable subarray of photon detector elements is configured to be movable by rotation of the first movable subarray around a first axis of the first movable subarray of photon detector elements and the second movable subarray of photon detector elements is configured to be movable by rotation of the second movable subarray around a second axis of the second movable subarray of photon detector elements. In some embodiments, the first configuration comprises a first array of photon detector elements having R1 rows and C1 ASTO-39600.601 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements; and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by the first array of photon detector elements and the third array of photon detector elements. In some embodiments, the first movable subarray of photon detector elements comprises (R2 × (C2 – C1)) photon detector elements and the second movable subarray of photon detector elements comprises (R3 × (C3 – C1)) photon detector elements. In some embodiments, the first movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns and the second movable subarray of photon detector elements comprises R3 rows and (C3 – C1) columns. In some embodiments, the first movable subarray of photon detector elements comprises a first plurality of m1 sub-subarrays and the second movable subarray of photon detector elements comprises a second plurality of m2 sub-subarrays. In some embodiments, each sub-subarray of the first plurality of m1 sub-subarrays comprises R2 rows and (C2 / m1) columns and wherein each sub-subarray of the second plurality of m2 sub-subarrays comprises R3 rows and (C3 / m2) columns. In some embodiments, transforming the first movable subarray of photon detector elements comprises rotating each sub-subarray of the first plurality of m1 sub-subarrays and transforming the second movable subarray of photon detector elements comprises rotating each sub- subarray of the second plurality of m2 sub-subarrays. In some embodiments, rotating each sub-subarray of the first plurality of m1 sub-subarrays comprises rotating adjacent sub-subarrays in opposite directions and / or rotating each sub-subarray of the second plurality of m2 sub-subarrays comprises rotating adjacent sub-subarrays in opposite directions. In some embodiments, rotating each sub-subarray of the first plurality of m1 sub-subarrays comprises rotating m1 sub-subarrays in a first direction of rotation and rotating (m1 – 1) sub-subarrays in a second direction of rotation, wherein the first direction of rotation and the second direction of rotation are in opposite directions; and / or wherein rotating each sub-subarray of the second plurality of m2 sub-subarrays comprises rotating m2 sub-subarrays in a first direction of rotation and rotating (m2 – 1) sub-subarrays in a second direction of rotation, wherein the first direction of rotation and the second direction of rotation are in opposite directions. In some embodiments, the photon detector elements are x-ray detector elements. ASTO-39600.601 In some embodiments, the technology provides a photon detector comprising a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by the first array of photon detector elements and the third array of photon detector elements; and wherein the first array and the second array are aligned at one edge and the first array and the third array are aligned at one edge. In some embodiments, a first edge of the first array and one edge of the second array are aligned and a second edge of the first array and one edge of the third array are aligned. In some embodiments, the first edge of the first array is a row edge, the one edge of the second array is a row edge, the second edge of the first array is a row edge, and the one edge of the third array is a row edge. In some embodiments, the first edge of the first array is a top edge, the one edge of the second array is a top edge, the second edge of the first array is a bottom edge, and the one edge of the third array is a bottom edge. In some embodiments, the technology provides a photon detector comprising a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by the first array of photon detector elements and the third array of photon detector elements; and wherein the first array and the second array are aligned at two edges and the first array and the third array are aligned at two edges. In some embodiments, a first edge of the first array and a first edge of the second array are aligned, a second edge of the first array and a second edge of the second array are aligned, a third edge of the first array and a first edge of the third array are aligned, and a fourth edge of the first array and a second edge of the third array are aligned. In some embodiments, a first edge of the first array is a row edge, the first edge of the second array is a row edge, the second edge of the first array is a column edge, the second edge of the second array is a column edge, the third ASTO-39600.601 edge of the first array is a row edge, the first edge of the third array is a row edge, the fourth edge of the first array is a column edge, and the second edge of the third array is a column edge. In some embodiments, the first edge of the first array is a top edge, the first edge of the second array is a top edge, the second edge of the first array is a left edge, the second edge of the second array is a left edge, the third edge of the first array is a bottom edge, the first edge of the third array is a bottom edge, the fourth edge of the first array is a right edge, and the second edge of the third array is a right edge. In some embodiments, the technology provides a photon detector comprising a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by the first array of photon detector elements and the second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by the first array of photon detector elements and the third array of photon detector elements; and wherein the first array and the second array are aligned at zero edges and the first array and the third array are aligned at zero edges. In some embodiments, the technology provides systems. For example, in some embodiments, systems comprise a photon detector or a configurable photon detector as described herein. In some embodiments, systems further comprise a source, a patient positioning system, a patient, and / or a software component configured to receive signals from the photon detector and produce an image. In some embodiments, systems comprise a mobile platform. For example, in some embodiments, systems comprise a source and a detector as described herein installed on a mobile platform (e.g., a vehicle such as a truck, bus, trailer, or other mobile container). In some embodiments, the patient is positioned in an upright position (e.g., a vertical position (e.g., a substantially and / or essentially vertical position (e.g., standing, sitting, kneeling, perched))). In some embodiments, the patient positioning system is configured to support a patient in an upright position (e.g., a vertical position (e.g., a substantially and / or essentially vertical position (e.g., standing, sitting, kneeling, perched))). Accordingly, in some embodiments, the systems comprise a patient positioning system configured to support a patient in an upright position and further comprise a patient positioned in an upright position (e.g., a vertical position (e.g., a substantially and / or essentially vertical position (e.g., standing, sitting, kneeling, perched))). ASTO-39600.601 In some embodiments, the technology provides methods, e.g., methods for obtaining a medical image. For example, in some embodiments, methods comprise providing a photon detector comprising a first array of photon detector elements having R1 rows and C1 columns; and a second array of photon detector elements having R2 rows and C2 columns, wherein C2 > C1 and R1 > R2; contacting a patient with a photon beam produced by a source; and obtaining a signal from the photon detector. In some embodiments, methods further comprise constructing an image of a portion of the patient using the signal. In some embodiments, the photon beam contacts a region of the patient that is to be imaged. Accordingly, in some embodiments, the photon beam contacts the patient heart. In some embodiments, the photon beam contacts the patient lung. In some embodiments, the image is an image of the patient heart. In some embodiments, the image is an image of the patient lung. In some embodiments, the photon detector comprises a plurality of subarrays of detector elements and the signal is provided by a subarray of detector elements of the photon detector. In some embodiments, the subarray comprises multiple rows of detector elements. In some embodiments, the subarray comprises one row of detector elements. In some embodiments, methods comprise providing a configurable photon detector configured to be transformable between a first configuration comprising photon detector elements and a second configuration comprising said photon detector elements; contacting a patient with a photon beam produced by a source; and obtaining a signal from the photon detector. In some embodiments, methods further comprise transforming the configurable photon detector from a first configuration to a second configuration. In some embodiments, the transforming comprises rotating a subarray of detector elements. In some embodiments, the transforming comprises translating a subarray of detector elements. Additional embodiments will be apparent to persons skilled in the relevant art based on the teachings contained herein. BRIEF DESCRIPTION OF THE DRAWINGS These and other features, aspects, and advantages of the present technology will become better understood with regard to the following drawings. The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawings will be provided by the Office upon request and payment of the necessary fee. ASTO-39600.601 FIG. 1A is a schematic drawing of a detector comprising an array of detector elements A1 (filled gray) and an array of detector elements A2 (ascending hatching). The detector comprises a central portion (provided by array A1) and two lateral portions (provided by the portions of A2 not also in A1 (marked by ascending hatching and not filled gray)). FIG. 1B is a schematic drawing of a detector comprising an array of detector elements A1 (filled gray), an array of detector elements A2 (ascending hatching), and an array of detector elements A3 (descending hatching). The detector comprises a central portion (provided by array A1) and four lateral portions (provided by the portions of A2 and A3 not also in A1 (marked by hatching and not filled gray)). FIG. 1C is a schematic drawing of a detector comprising an array of detector elements A1 (filled gray), an array of detector elements A2 (ascending hatching), and an array of detector elements A3 (descending hatching). The detector comprises a central portion (provided by array A1) and four lateral portions (provided by the portions of A2 and A3 not also in A1 (marked by hatching and not filled gray)). FIG. 1D is a schematic drawing of a detector comprising an array of detector elements A1 (filled gray), an array of detector elements A2 (ascending hatching), and an array of detector elements A3 (descending hatching). The detector comprises a central portion (provided by array A1) and two lateral portions (provided by the portions of A2 and A3 not also in A1 (marked by hatching and not filled gray)). FIG. 1E is a drawing showing a top view of a detector having a linear shape. FIG. 1F is a drawing showing a top view of a detector having a curved shape (e.g., an arc of a circle or an arc of an ellipse). FIG. 1G is a drawing showing a top view of a detector having a linear shape and comprising an anti-scatter grid. FIG. 1H is a drawing showing a top view of a detector having a curved shape (e.g., an arc of a circle or an arc of an ellipse) and comprising an anti-scatter grid. FIG. 2 is a schematic drawing showing the rows and columns for a detector as shown in FIG.1A. FIG. 3 is a schematic drawing showing the designation of indices to identify rows, columns, and detector elements of a detector. FIG. 4A is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements. FIG. 4B is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements. ASTO-39600.601 FIG. 4C is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements and further showing axes of rotation around which the movable subarrays of detector elements rotate. FIG. 4D is a schematic drawing of a configurable detector in a second configuration comprising movable subarrays of detector elements. FIG. 4E is a schematic drawing showing a top view of a configurable detector (or portion thereof) comprising an anti-scatter grid and a movable subarray of detector elements that is rotatable around an axis of rotation. The configurable detector has a linear shape and is shown in a first configuration. FIG. 4F is a schematic drawing showing a top view of a configurable detector (or portion thereof) comprising an anti-scatter grid and a movable subarray of detector elements that is rotatable around an axis of rotation. The configurable detector has a curved shape and is shown in a first configuration. FIG. 4G is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements and further showing translation rails along which the movable subarrays of detector elements translate. FIG. 4H is a schematic drawing of a configurable detector in a second configuration comprising movable subarrays of detector elements. FIG. 5 is a schematic drawing showing the rows and columns for a detector as shown in FIG.1B. FIG. 6A is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements. The movable subarrays of detector elements comprise movable sub-subarrays of detector elements and provide foldable lateral portions. FIG. 6B is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements. The movable subarrays of detector elements comprise movable sub-subarrays of detector elements and provide foldable lateral portions. FIG. 6C is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements. The movable subarrays of detector elements comprise movable sub-subarrays of detector elements and provide foldable lateral portions. FIG.6C further shows axes of rotation around which the movable sub- subarrays of detector elements rotate. FIG. 6D is a schematic drawing of a configurable detector in a second configuration comprising movable subarrays of detector elements and in which the ASTO-39600.601 movable subarrays of detector elements comprise movable sub-subarrays of detector elements to provide foldable lateral portions. FIG. 7A is a schematic drawing in a top view of an acquisition of image data from a patient using a source and detector and in which the source and detector revolve around the patient during acquisition. The detector is shown having a linear shape, e.g., as shown in FIG.1E. However, the detector may alternatively have a curved shape as described herein, e.g., as shown in FIG.1F. FIG. 7B is a schematic drawing in a top view of an acquisition of image data from a patient using a static source and detector and in which the patient rotates during acquisition. The detector is shown having a linear shape, e.g., as shown in FIG. 1E. However, the detector may alternatively have a curved shape as described herein, e.g., as shown in FIG.1F. FIG. 7C is a schematic drawing of an acquisition of image data from a patient using a source and detector and in which the detector translates in the Z-direction with respect to the patient while the patient is rotated. FIG. 7D is a schematic drawing of an acquisition of image data from a patient using a source and detector and in which the patient translates in the Z-direction with respect to the detector while the patient is rotated. FIG. 8 is a schematic drawing of a detector. FIG. 9 is a schematic drawing of a detector. FIG. 10 is a schematic drawing of a detector. FIG. 11 is a schematic drawing of a detector. FIG. 12 is a schematic drawing of a detector. FIG. 13 is a schematic drawing of a detector. FIG. 14 is a schematic drawing of a detector. FIG. 15 is a schematic drawing of a detector. FIG. 16 is a schematic drawing of a detector. FIG. 17 is a schematic drawing of a detector. FIG. 18 is a schematic drawing of a detector. FIG. 19 is a schematic drawing of a detector. FIG. 20 is a schematic drawing of a detector. FIG. 21 is a schematic drawing of a detector. FIG. 22A is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements, each of which is rotatable around an axis to provide the configurable detector in a second configuration. ASTO-39600.601 FIG. 22B is a schematic drawing of a configurable detector in a second configuration comprising movable subarrays of detector elements. FIG. 23A is a schematic drawing of a configurable detector in a first configuration comprising movable subarrays of detector elements, each of which is rotatable around an axis to provide the configurable detector in a second configuration. The movable subarrays of detector elements comprise movable sub-subarrays of detector elements and provide foldable lateral portions. FIG. 23B is a schematic drawing of a configurable detector in a second configuration comprising movable subarrays of detector elements and in which the movable subarrays of detector elements comprise movable sub-subarrays of detector elements. FIG. 24 is a schematic drawing of an exemplary detector in a “palanquin” arrangement as described in Example 1. FIG. 25 is a schematic drawing of an exemplary detector in a “palanquin” arrangement as described in Example 2. It is to be understood that the figures are not necessarily drawn to scale, nor are the objects in the figures necessarily drawn to scale in relationship to one another. The figures are depictions that are intended to bring clarity and understanding to various embodiments of apparatuses, systems, and methods disclosed herein. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Moreover, it should be appreciated that the drawings are not intended to limit the scope of the present teachings in any way. DETAILED DESCRIPTION Provided herein is technology relating to medical imaging and particularly, but not exclusively, to a detector for computerized tomography, methods of using the detector for computerized tomography, and systems comprising the detector for computerized tomography. In this detailed description of the various embodiments, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of the embodiments disclosed. One skilled in the art will appreciate, however, that these various embodiments may be practiced with or without these specific details. In other instances, structures and devices are shown in block diagram form. Furthermore, one skilled in the art can readily appreciate that the specific sequences in which methods are presented and performed are illustrative and it is contemplated that the sequences ASTO-39600.601 can be varied and still remain within the spirit and scope of the various embodiments disclosed herein. All literature and similar materials cited in this application, including but not limited to, patents, patent applications, articles, books, treatises, and internet web pages are expressly incorporated by reference in their entirety for any purpose. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which the various embodiments described herein belongs. When definitions of terms in incorporated references appear to differ from the definitions provided in the present teachings, the definition provided in the present teachings shall control. The section headings used herein are for organizational purposes only and are not to be construed as limiting the described subject matter in any way. Definitions To facilitate an understanding of the present technology, a number of terms and phrases are defined below. Additional definitions are set forth throughout the detailed description. Throughout the specification and claims, the following terms take the meanings explicitly associated herein, unless the context clearly dictates otherwise. The phrase “in one embodiment” as used herein does not necessarily refer to the same embodiment, though it may. Furthermore, the phrase “in another embodiment” as used herein does not necessarily refer to a different embodiment, although it may. Thus, as described below, various embodiments of the invention may be readily combined, without departing from the scope or spirit of the invention. In addition, as used herein, the term “or” is an inclusive “or” operator and is equivalent to the term “and / or” unless the context clearly dictates otherwise. The term “based on” is not exclusive and allows for being based on additional factors not described, unless the context clearly dictates otherwise. In addition, throughout the specification, the meaning of “a”, “an”, and “the” include plural references. The meaning of “in” includes “in” and “on.” As used herein, the terms “about”, “approximately”, “substantially”, and “significantly” are understood by persons of ordinary skill in the art and will vary to some extent on the context in which they are used. If there are uses of these terms that are not clear to persons of ordinary skill in the art given the context in which they are used, “about” and “approximately” mean plus or minus less than or equal to 10% of the ASTO-39600.601 particular term and “substantially” and “significantly” mean plus or minus greater than 10% of the particular term. As used herein, disclosure of ranges includes disclosure of all values and further divided ranges within the entire range, including endpoints and sub-ranges given for the ranges. As used herein, the disclosure of numeric ranges includes the endpoints and each intervening number therebetween with the same degree of precision. For example, for the range of 6–9, the numbers 7 and 8 are contemplated in addition to 6 and 9, and for the range 6.0–7.0, the numbers 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, and 7.0 are explicitly contemplated. As used herein, the suffix “-free” refers to an embodiment of the technology that omits the feature of the base root of the word to which “-free” is appended. That is, the term “X-free” as used herein means “without X”, where X is a feature of the technology omitted in the “X-free” technology. For example, a “calcium-free” composition does not comprise calcium, a “mixing-free” method does not comprise a mixing step, etc. Although the terms “first”, “second”, “third”, etc. may be used herein to describe various steps, elements, compositions, components, regions, layers, and / or sections, these steps, elements, compositions, components, regions, layers, and / or sections should not be limited by these terms, unless otherwise indicated. These terms are used to distinguish one step, element, composition, component, region, layer, and / or section from another step, element, composition, component, region, layer, and / or section. Terms such as “first”, “second”, and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first step, element, composition, component, region, layer, or section discussed herein could be termed a second step, element, composition, component, region, layer, or section without departing from technology. As used herein, the word “presence” or “absence” (or, alternatively, “present” or “absent”) is used in a relative sense to describe the amount or level of a particular entity (e.g., component, action, element). For example, when an entity is said to be “present”, it means the level or amount of this entity is above a pre-determined threshold; conversely, when an entity is said to be “absent”, it means the level or amount of this entity is below a pre-determined threshold. The pre-determined threshold may be the threshold for detectability associated with the particular test used to detect the entity or any other threshold. When an entity is “detected” it is “present”; when an entity is “not detected” it is “absent”. ASTO-39600.601 As used herein, an “increase” or a “decrease” refers to a detectable (e.g., measured) positive or negative change, respectively, in the value of a variable relative to a previously measured value of the variable, relative to a pre-established value, and / or relative to a value of a standard control. An increase is a positive change preferably at least 10%, more preferably 50%, still more preferably 2-fold, even more preferably at least 5-fold, and most preferably at least 10-fold relative to the previously measured value of the variable, the pre-established value, and / or the value of a standard control. Similarly, a decrease is a negative change preferably at least 10%, more preferably 50%, still more preferably at least 80%, and most preferably at least 90% of the previously measured value of the variable, the pre-established value, and / or the value of a standard control. Other terms indicating quantitative changes or differences, such as “more” or “less,” are used herein in the same fashion as described above. As used herein, the term “number” shall mean one or an integer greater than one (e.g., a plurality). As used herein, a “system” refers to a plurality of real and / or abstract components operating together for a common purpose. In some embodiments, a “system” is an integrated assemblage of hardware and / or software components. In some embodiments, each component of the system interacts with one or more other components and / or is related to one or more other components. In some embodiments, a system refers to a combination of components and software for controlling and directing methods. For example, a “system” or “subsystem” may comprise one or more of, or any combination of, the following: mechanical devices, hardware, components of hardware, circuits, circuitry, logic design, logical components, software, software modules, components of software or software modules, software procedures, software instructions, software routines, software objects, software functions, software classes, software programs, files containing software, etc., to perform a function of the system or subsystem. Thus, the methods and apparatus of the embodiments, or certain aspects or portions thereof, may take the form of program code (e.g., instructions) embodied in tangible media, such as floppy diskettes, CD-ROMs, hard drives, flash memory, or any other machine-readable storage medium wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the embodiments. In the case of program code execution on programmable computers, the computing device generally includes a processor, a storage medium readable by the processor (e.g., volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device. One or more ASTO-39600.601 programs may implement or utilize the processes described in connection with the embodiments, e.g., through the use of an application programming interface (API), reusable controls, or the like. Such programs are preferably implemented in a high-level procedural or object-oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language, and combined with hardware implementations. As used herein, the term “computed tomography” is abbreviated “CT” and refers both to tomographic and non-tomographic radiography. For instance, the term “CT” refers to numerous forms of CT, including but not limited to X-ray CT, positron emission tomography (PET), single-photon emission computed tomography (SPECT), and photon counting computed tomography. Generally, computed tomography (CT) comprises use of an x-ray source and a detector that revolves around a patient and subsequent reconstruction of images into different planes. In embodiments of CT (e.g., devices, apparatuses, and methods provided for CT) described herein, the x-ray source is a static source, and the patient is rotated with respect to the static source. Currents for x-rays used in CT describe the current flow from a cathode to an anode and are typically measured in milliamperes (mA). As used herein, the term “structured to [verb]” means that the identified element or assembly has a structure that is shaped, sized, disposed, coupled, and / or configured to perform the identified verb. For example, a member that is “structured to move” is movably coupled to another element and includes elements that cause the member to move, or the member is otherwise configured to move in response to other elements or assemblies. As such, as used herein, “structured to [verb]” recites structure and not function. Further, as used herein, “structured to [verb]” means that the identified element or assembly is intended to, and is designed to, perform the identified verb. As used herein, the term “associated” means that the elements are part of the same assembly and / or operate together or act upon / with each other in some manner. For example, an automobile has four tires and four hub caps. While all the elements are coupled as part of the automobile, it is understood that each hubcap is “associated” with a specific tire. As used herein, the term “coupled” refers to two or more components that are secured, by any suitable means, together. Accordingly, in some embodiments, the statement that two or more parts or components are “coupled” shall mean that the parts are joined or operate together either directly or indirectly, e.g., through one or more ASTO-39600.601 intermediate parts or components. As used herein, “directly coupled” means that two elements are directly in contact with each other. As used herein, “fixedly coupled” or “fixed” means that two components are coupled so as to move as one while maintaining a constant orientation relative to each other. Accordingly, when two elements are coupled, all portions of those elements are coupled. A description, however, of a specific portion of a first element being coupled to a second element, e.g., an axle first end being coupled to a first wheel, means that the specific portion of the first element is disposed closer to the second element than the other portions thereof. Further, an object resting on another object held in place only by gravity is not “coupled” to the lower object unless the upper object is otherwise maintained substantially in place. That is, for example, a book on a table is not coupled thereto, but a book glued to a table is coupled thereto. As used herein, the term “removably coupled” or “temporarily coupled” means that one component is coupled with another component in an essentially temporary manner. That is, the two components are coupled in such a way that the joining or separation of the components is easy and does not damage the components. Accordingly, “removably coupled” components may be readily uncoupled and recoupled without damage to the components. As used herein, the term “operatively coupled” means that a number of elements or assemblies, each of which is movable between a first position and a second position, or a first configuration and a second configuration, are coupled so that as the first element moves from one position / configuration to the other, the second element moves between positions / configurations as well. It is noted that a first element may be “operatively coupled” to another without the opposite being true. As used herein, the term “rotatably coupled” refers to two or more components that are coupled in a manner such that at least one of the components is rotatable with respect to the other. As used herein, the term “translatably coupled” refers to two or more components that are coupled in a manner such that at least one of the components is translatable with respect to the other. As used herein, the term “temporarily disposed” means that a first element or assembly is resting on a second element or assembly in a manner that allows the first element / assembly to be moved without having to decouple or otherwise manipulate the first element. For example, a book simply resting on a table, e.g., the book is not glued or fastened to the table, is “temporarily disposed” on the table. ASTO-39600.601 As used herein, the term “correspond” indicates that two structural components are sized and shaped to be similar to each other and may be coupled with a minimum amount of friction. Thus, an opening which “corresponds” to a member is sized slightly larger than the member so that the member may pass through the opening with a minimum amount of friction. This definition is modified if the two components are to fit “snugly” together. In that situation, the difference between the size of the components is even smaller whereby the amount of friction increases. If the element defining the opening and / or the component inserted into the opening are made from a deformable or compressible material, the opening may even be slightly smaller than the component being inserted into the opening. With regard to surfaces, shapes, and lines, two, or more, “corresponding” surfaces, shapes, or lines have generally the same size, shape, and contours. As used herein, a “path of travel” or “path,” when used in association with an element that moves, includes the space an element moves through when in motion. As such, any element that moves inherently has a “path of travel” or “path.” As used herein, the statement that two or more parts or components “engage” one another shall mean that the elements exert a force or bias against one another either directly or through one or more intermediate elements or components. Further, as used herein with regard to moving parts, a moving part may “engage” another element during the motion from one position to another and / or may “engage” another element once in the described position. Thus, it is understood that the statements, “when element A moves to element A first position, element A engages element B,” and “when element A is in element A first position, element A engages element B” are equivalent statements and mean that element A either engages element B while moving to element A first position and / or element A engages element B while in element A first position. As used herein, the term “operatively engage” means “engage and move.” That is, “operatively engage” when used in relation to a first component that is structured to move a movable or rotatable second component means that the first component applies a force sufficient to cause the second component to move. For example, a screwdriver may be placed into contact with a screw. When no force is applied to the screwdriver, the screwdriver is merely “coupled” to the screw. If an axial force is applied to the screwdriver, the screwdriver is pressed against the screw and “engages” the screw. However, when a rotational force is applied to the screwdriver, the screwdriver “operatively engages” the screw and causes the screw to rotate. Further, with electronic ASTO-39600.601 components, “operatively engage” means that one component controls another component by a control signal or current. As used herein, the term “number” shall mean one or an integer greater than one (e.g., a plurality). As used herein, in the phrase “[x] moves between its first position and second position,” or, “[y] is structured to move [x] between its first position and second position,” “[x]” is the name of an element or assembly. Further, when [x] is an element or assembly that moves between a number of positions, the pronoun “its” means “[x],” i.e., the named element or assembly that precedes the pronoun “its.” As used herein, a “radial side / surface” for a circular or cylindrical body is a side / surface that extends about, or encircles, the center thereof or a height line passing through the center thereof. As used herein, an “axial side / surface” for a circular or cylindrical body is a side that extends in a plane extending generally perpendicular to a height line passing through the center. That is, generally, for a cylindrical soup can, the “radial side / surface” is the generally circular sidewall and the “axial side(s) / surface(s)” are the top and bottom of the soup can. As used herein, the term “pixel”, when referring to a detector element, refers to the smallest discrete element of photon sensing by a photon detector element and thus also by a detector. In some embodiments, a pixel has an area of approximately 1 mm × 1 mm (e.g., approximately 0.5 to 1.5 mm (e.g., 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0 mm) × 0.5 to 1.5 mm (e.g., 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.0 mm)). As used herein, the term “detector element” refers to an array of pixels providing a photodetector suitable for CT imaging. For example, a detector element may comprise a pixel array comprising approximately 10–100 pixels by 10–100 pixels (e.g., 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, or 110 pixels by 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, or 110 pixels). A detector element comprises a component for detecting photons at each pixel ASTO-39600.601 and a component for outputting an electrical signal (e.g., a current or voltage) for each pixel corresponding to photons detected by each pixel of the detector element. The electrical signal indicates the intensity of photons incident on the detector element. As described herein, the detector elements are tileable into arrays of detector elements (e.g., having columns and rows of detector elements). An integrating (“indirect”) detector element comprises a scintillator and a photodiode (e.g., a semiconductor). X-ray photons impacting the scintillator produce a number of visible light photons that are absorbed by the photodiode. The photodiode measures the amount of light produced by the scintillator and generates an electrical signal (e.g., a current or voltage) proportional to the total energy deposited during a measurement interval. A photon counting (“direct”) detector element comprises a photodiode (e.g., a semiconductor) that produces a current or voltage for each photon detected by the photodiode (a photon counting detector element does not comprise a scintillator). X-ray photons absorbed in the semiconductor generate pairs of positive and negative charges that move away from each other due to a voltage applied to the semiconductor. The moving charges generate an electrical signal that is provided to an electronic readout circuit. For example, a photon counting detector element may comprise a multi-channel analyzer that identifies photons based on photon energy and categorizes photons into energy channels based on photon energy. Thus, a photon counting detector element may be used to produce a photon energy spectrum. As used herein, the term “module” or “detector module” refers to a discrete component of a detector comprising a number of detector elements. In some embodiments, a “detector module” includes a single detector element. In some embodiments, a “detector module” includes a plurality of detector elements, e.g., a detector module may comprise an array of a plurality of detector elements. Accordingly, a number of detector modules may be assembled to provide a detector having a desired design and number of detector elements and / or a desired number of pixels, e.g., in some embodiments arranged in a number of rows and a number of columns. Thus, a detector may comprise a number of detector modules, a detector module may comprise a number of detector elements, and a detector element may comprise a number of pixels. In some embodiments, a “detector module” further comprises one or more of a support component (e.g., providing physical support and stability to the detector module), electronics, and a read-out component. In some embodiments, a “detector module” further comprises an anti-scatter grid. In some embodiments, the detector module comprises an anti-scatter grid fixed coupled to the detector module. In some ASTO-39600.601 embodiments, the detector module is associated with an anti-scatter grid but the detector module and anti-scatter grid are separate, independent components. As used herein, the term “acquisition” refers to the data collected during an imaging scan. As used herein, the term “Z-axis” or “Z-direction” refers to an axis and / or direction parallel and / or substantially parallel to the axis of rotation of the patient during an acquisition; or refers to an axis and / or direction parallel and / or substantially parallel to the axis around which the source and detector (e.g., as housed in a gantry) revolve during an acquisition. For a patient placed in an upright (e.g., standing, sitting, kneeling, perched) position, the Z-axis is generally vertical, and a Z-direction is generally “up” or “down”. As used herein, the term “revolutions” refers to the number of 360-degree rotations through which a patient is rotated around a Z-axis during a single acquisition; or refers to the number of revolutions through which the source and detector are revolved around a Z-axis (e.g., revolved around a patient) during a single acquisition. As used herein, the term “pitch” refers to the relative translation of the patient with respect to the detector in the Z-direction during one 360-degree rotation of the patient or during one 360-degree revolution of the source and detector divided by a length associated with the beam and / or data acquisition. The most common length value used is the height of the beam (e.g., collimated beam) along a Z-axis on the surface of the detector (e.g., the height in the Z-direction of the collimated beam as projected onto the detector). Translation of the patient with respect to the detector in a Z-direction may occur by movement of the patient in a Z-direction, movement of the detector in a Z- direction, and / or movement of both the patient and the detector in a Z-direction. For example, if the relative translation of the patient with respect to the detector in the Z- direction was 10 mm during one 360-degree patient rotation and the collimated beam had a length of 10 mm, then the pitch equaled 1.0 (10 mm / 10 mm). Thus, a pitch of 1.0 indicates that the x-ray beams are contiguous for adjacent rotations. A pitch greater than 1.0 indicates that the x-ray beams are not contiguous for adjacent rotations so that gaps exist between adjacent scans (e.g., in the helix for a helical scan or adjacent cylinders in an axial scan). An acquisition at a pitch greater than 1.0 results in the full volume being exposed to radiation and fewer projections per rotation. A pitch less than 1.0 indicates that the x-ray beams overlap for adjacent rotations. An acquisition at a pitch less than 1.0 results in a volume of tissue being irradiated more than once per scan. Accordingly, the pitch affects both image quality and patient dose, e.g., increasing ASTO-39600.601 the pitch decreases patient dose and decreases image quality (fewer projections are obtained, resulting in lower signal to noise ratio) and decreasing the pitch increases image quality and increases patient dose. As used herein, the term “detector configuration” refers to the number of detector elements (e.g., provided in columns and rows by a number of detector modules). In some embodiments, the “detector configuration” describes the length along a Z-axis of individual data acquisition channels and the total number of individual data acquisition channels (“rows”) along the Z-axis. For example, 64 rows of 0.5-mm detectors (N = 64, T = 0.5^mm) may be used with a collimated beam width of 32. The collimation of the x-ray beam along the Z-axis often is provided to match the detector configuration. Furthermore, the coverage and scanning speed can be determined from N × T, rotation time, and pitch. In this way, faster rotation speeds and wider beams covering greater width of the patient in the Z-direction are used to achieve faster scans of a given patient region. As used herein, a “diagnostic” test includes the detection or identification of a disease state or condition of a subject, determining the likelihood that a subject will contract a given disease or condition, determining the likelihood that a subject with a disease or condition will respond to therapy, determining the prognosis of a subject with a disease or condition (or its likely progression or regression), and determining the effect of a treatment on a subject with a disease or condition. For example, a diagnostic can be used for detecting the presence or likelihood of a subject having a cancer or the likelihood that such a subject will respond favorably to a compound (e.g., a pharmaceutical, e.g., a drug) or other treatment. As used herein, the term “condition” refers generally to a disease, malady, injury, event, or change in health status. As used herein, the term “treating” or “treatment” with respect to a condition refers to preventing the condition, slowing the onset or rate of development of the condition, reducing the risk of developing the condition, preventing or delaying the development of symptoms associated with the condition, reducing or ending symptoms associated with the condition, generating a complete or partial regression of the condition, or some combination thereof. In some embodiments, “treatment” comprises exposing a patient or a portion thereof (e.g., a tissue, organ, body part, or other localize region of a patient body) to radiation (e.g., electromagnetic radiation, ionizing radiation). As used herein, the term “beam” refers to a stream of radiation (e.g., electromagnetic wave and / or or particle radiation). In some embodiments, the beam is ASTO-39600.601 produced by a source and is restricted to a small-solid angle. In some embodiments, the beam is collimated. In some embodiments, the beam is generally unidirectional. In some embodiments, the beam is divergent. As used herein, the term “patient” or “subject” refers to a mammalian animal that is identified and / or selected for imaging and / or treatment with radiation. Accordingly, in some embodiments, a patient or subject is contacted with a beam of radiation, e.g., a primary beam produced by a radiation source. In some embodiments, the patient or subject is a human. In some embodiments, the patient or subject is a veterinary or farm animal, a domestic animal or pet, or animal used for clinical research. In some embodiments, the subject or patient has cancer and / or the subject or patient has either been recognized as having or at risk of having cancer. In some embodiments, a patient is positioned in an “upright position”. As used herein, an upright position refers to a vertical and / or substantially vertical position, e.g., seated, seated and leaning backward, seated and leaning forward, standing, standing and leaning backward, standing and leaning forward, perched (a generally standing position with a torso angled posteriorly with respect to a vertical axis, optionally also having bent knees), kneeling, kneeling and leaning forward, or kneeling and leaning backward. As used herein, the term “treatment volume” or “imaging volume” refers to the volume (e.g., tissue) of a patient that is selected for imaging and / or treatment with radiation. For example, in some embodiments, the “treatment volume” or “imaging volume” comprises a tumor in a cancer patient. As used herein, the term “healthy tissue” refers to the volume (e.g., tissue) of a patient that is not and / or does not comprise the treatment volume. In some embodiments, the imaging volume is larger than the treatment volume and comprises the treatment volume. As used herein, the term “radiation source” or “source” refers to an apparatus that produces radiation (e.g., ionizing radiation) in the form of photons (e.g., described as particles or waves). In some embodiments, a radiation source is a linear accelerator (“linac”) that produces x-rays to image a patient by contacting the patient with the x- rays. In some embodiments, the source produces electromagnetic waves (e.g., x-rays and / or gamma rays having a wavelength in the range of approximately 1 pm to approximately 1 nm). While it is understood that radiation can be described as having both wave-like and particle-like aspects, it is sometimes convenient to refer to radiation in terms of waves and sometimes convenient to refer to radiation in terms of particles. Accordingly, both descriptions are used throughout without limiting the technology and ASTO-39600.601 with an understanding that the laws of quantum mechanics provide that every particle or quantum entity is described as either a particle or a wave. As used herein, the term “static source” refers to a source that does not revolve around a patient during use of the source for imaging or therapy. In particular, a “static source” remains fixed with respect to an axis passing through the patient while the patient is being imaged or treated. While the patient may rotate around said axis to produce relative motion between the static source and rotating patient that is equivalent to the relative motion of a source revolving around a static patient, a static source does not move with reference to a third object, frame of reference (e.g., a treatment room in which a patient is positioned), or patient axis of rotation during imaging or treatment, while the patient is rotated with respect to said third object, said frame of reference (e.g., said treatment room in which said patient is positioned), or patient axis of rotation through the patient during imaging or treatment. In some embodiments, a static source is installed on a mobile platform and thus the static source may move with respect to the Earth and fixtures on the Earth as the mobile platform moves to transport the static source. Thus, the term “static source” may refer to a mobile “static source” provided that the mobile “static source” does not revolve around an axis of rotation through the patient during imaging or treatment of the patient. Further, the static source may translate and / or revolve around the patient to position the static source prior to imaging or treatment of the patient or after imaging or treatment of the patient. Thus, the term “static source” may refer to a source that translates or revolves around the patient in non-imaging and non-treatment use, e.g., to position the source relative to the patient when the patient is not being imaged and / or treated. In some embodiments, the “static source” is a photon source and thus is referred to as a “static photon source”. Description The technology provided herein relates to a photon detector, e.g., an x-ray detector. In some embodiments, the x-ray detector is a component of a computed tomography scanner (e.g., comprising an x-ray source and an x-ray detector as described herein). The photon (e.g., x-ray) detector comprises one or more arrays of detector elements (e.g., photon detector elements (e.g., x-ray detector elements)) provided in arrangements as described herein. For example, e.g., as shown in FIG. 1A, embodiments provide an x-ray detector comprising a first array of detector elements A1 (gray square) and a second array of detector elements A2 (ascending hatched rectangle). The x-ray detector comprises a ASTO-39600.601 subarray of detector elements (gray, ascending hatched rectangle) shared by the first array of detector elements A1 and the second array of detector elements A2 in the region where the first array of detector elements A1 and the second array of detector elements A2 overlap. In some embodiments, e.g., as shown in FIG.1B, FIG. 1C, and FIG. 1D, the technology provides x-ray detectors comprising a first array of detector elements A1 (gray square) and a plurality of overlapping x-ray detector element arrays and thus a plurality of subarrays of detector elements. In some embodiments, embodiments provide detector elements comprising a first array of detector elements A1 (gray square), a second array of detector elements A2 (ascending hatched rectangle), and a third array of detector elements A3 (descending hatched rectangle). The x-ray detectors according to these embodiments comprise a first subarray of detector elements (gray, ascending hatched rectangle) shared by the first array of detector elements A1 and the second array of detector elements A2 in the region where the first array of detector elements A1 and the second array of detector elements A2 overlap and a second subarray of detector elements (gray, descending hatched rectangle) shared by the first array of detector elements A1 and the third array of detector elements A3 in the region where the first array of detector elements A1 and the third array of detector elements A3 overlap. In some embodiments, e.g., as shown in FIG.1E and FIG.1F, the detector viewed from above may have a linear shape (FIG.1E), a curved shape (FIG.1F) (e.g., a shape that is an arc of a circle or a shape that is an arc of an ellipse), or some other shape. In some embodiments, the distance from the surface of the detector is constant with respect to the isocenter of imaging. In some embodiments, the distance from the surface of the detector is constant with respect to the center of rotation of a patient. In some embodiments, e.g., as shown in FIG.1G and FIG.1H, the detector (100) comprises an anti-scatter grid (110). Anti-scatter grids are known in the art of radiology. An anti-scatter grid is located between the patient and the detector (and thus also between the source and the detector) to attenuate the number of scattered photons that contact the detector. As known in the art, an anti-scatter grid comprises a number of septa (e.g., comprising lead, copper, or other high-Z material) that separate a number of regions comprising an interspace material (e.g., aluminum, carbon fiber, air, or other low-Z material). See, e.g., Carlton et al. Principles of Radiographic Imaging: An Art and a Science (6th edition, 2019), Cengage Learning, incorporated herein by reference. In some embodiments, the technology comprises a linear anti-scatter grid (e.g., comprising parallel septa that are focused to infinity (i.e., the primary x-rays have a ASTO-39600.601 parallel trajectory)). In some embodiments, the technology comprises a focused anti- scatter grid (e.g., comprising septa that are oriented to match the beam divergence from the focal spot to the detector at a specific focal length (i.e., source-to-detector distance)). In some embodiments, the detector viewed from above has a linear shape and comprises an anti-scatter grid having a matching linear shape. See FIG.1G. In some embodiments, the detector viewed from above has a curved shape and comprises an anti-scatter grid having a matching curved shape. See FIG.1H. As described herein, an anti-scatter grid may comprise and be provided in a number of sub-grids. In some embodiments, an anti-scatter grid is coupled (e.g., fixedly coupled) to a detector. In some embodiments, a sub-grid of an anti-scatter grid is coupled (e.g., fixedly coupled) to a subarray of detector elements of a detector. In some embodiments, an anti-scatter grid is associated with a detector but is not coupled or fixedly coupled with the detector. In some embodiments, a sub-grid of an anti-scatter grid is associated with a subarray of detector elements of a detector but is not coupled or fixedly coupled to the subarray of detector elements of a detector. For example, in some embodiments, a detector finds use in a geometry placing all elements of the detector at a common distance from a source and in which an anti-scatter grid is coupled (e.g., fixedly coupled) to the detector and / or a number of sub-grids of an anti-scatter grid are coupled (e.g., fixedly coupled) to a subarray of detector elements of the detector. In some embodiments, a detector finds use in a geometry placing all elements of the detector at a common distance from an imaging isocenter and in which an anti-scatter grid is associated with the detector and / or a number of sub-grids of an anti-scatter grid are associated with a subarray of detector elements of the detector, but in which the anti- scatter grid is not coupled to the detector and / or in which a number of sub-grids of an anti-scatter grid are not coupled to a subarray of detector elements of the detector. In some embodiments, the sub-grids are movable with respect to each other. In some embodiments, a plurality of sub-grids is assembled to provide an anti-scatter grid. In some embodiments, a plurality of sub-arrays of detector elements is assembled to provide an array of detector elements. In some embodiments, the arrays of detector elements are provided in columns and rows. For example, e.g., as shown in FIG.2, embodiments provide an x-ray detector (e.g., the x-ray detector of FIG. 1A) comprising a first array of detector elements A1 having C1 columns and R1 rows and a second array of detector elements A2 having C2 columns and R2 rows. The x-ray detector comprises a subarray of detector elements shared by the first array of detector elements A1 and the second array of detector ASTO-39600.601 elements A2 in the region where the first array of detector elements A1 and the second array of detector elements A2 overlap. The subarray of detector elements shared by the first array of detector elements A1 and the second array of detector elements A2 has C1 columns and R2 rows. As shown in FIG.3, the columns and rows of an array of detector elements may be used to refer to an individual x-ray detector element by a first number specifying the column and a second number specifying the row to provide a detector element address. As used herein, the columns are assigned integers from left to right and the rows are assigned integers from bottom to top. Thus, as shown in FIG.3, the first (leftmost) column of an array having C columns is column 0 (zero) and the last (rightmost) column of an array having C columns is column C–1, and the first (bottommost) row of an array having R rows is row 0 (zero) and the last (topmost) column of an array having R rows is row R–1. Further, column 0 (zero) and column C–1 may be referred to herein as an “edge column”, and row 0 (zero) and row R–1 each may be referred to as an “edge row” (FIG. 3). The detector elements at column, row addresses 0, 0; 0, R–1; C–1, R–1, and C–1, 0 may be referred to herein as “corner detector elements” or “corner elements” (e.g., of a “corner module”). While the embodiment shown in FIG. 3 is a square array of eight rows and eight columns, the technology is not limited to a square array of eight rows and eight columns. For example, in some embodiments, one or more arrays of the detector is a square array comprising at least 50; 100; 500; 1000; 5000; 10,000; 50,000; or 100,000 detector elements or more. In some embodiments, one or more arrays of the detector is a rectangular array comprising at least 50; 100; 500; 1000; 5000; 10,000; 50,000; or 100,000 detector elements or more. In some embodiments, one or more arrays of the detector is a square array comprising at least 64, 128, 160, 192, or 256 detector elements or more. In some embodiments, one or more arrays of the detector is a rectangular array comprising at least 64, 128, 160, 192, or 256 detector elements or more. In some embodiments, the detectors described herein are configurable and may be provided in a first configuration and a second configuration. In some embodiments, the detectors are transformable between the first and second configurations and may be transformed from a configuration to a second configuration and may be transformable from a second configuration to a first configuration. Embodiments provide that the detectors comprise one or more movable subarray(s) of detector elements and are configurable by transformation (e.g., translation, rotation, etc.) of one or more movable subarray(s) of detector elements. Embodiments provide that the detector may comprise ASTO-39600.601 an anti-scatter grid and subarrays of the detector may comprise a sub-grid of an anti- scatter grid. For example, e.g., as shown in FIG. 4A, the technology provides a detector 410 in a first configuration that is configurable to provide the detector 410 in a second configuration (FIG.4D). Further, e.g., as shown in FIG. 4D, the technology provides a detector 410 in a second configuration that is configurable to provide the detector 410 in a first configuration (FIG.4A). In some embodiments, the beam is shaped from the source using a collimator. In some embodiments, the collimator produces a rectangular beam shape. In some embodiments, the collimator comprises a plurality of beam blocking structures that are motor-driven into calibrated arrangements to provide a desired beam shape. In some embodiments, the collimator shapes the beam with millimeter resolution at the detector. Accordingly, embodiments provide that as the detector transforms between a first configuration (i.e., having a first shape) and a second configuration (i.e., having a second shape), the collimator shapes the beam to have a shape that matches the configuration of the detector. In some embodiments, the technology described herein comprises a collimator shape selector system that provides a plurality of pre-set beam shape options that may be selected (e.g., automatically or by a user) for corresponding pre-determined detector configurations described herein. In some embodiments, the collimator is inherently dynamic. As shown in FIG.4A, the technology provides a detector 410 in a first configuration (e.g., in the configuration shown in FIG.1D and in FIGS.4A, 4B, and 4C) comprising a first array of detector elements A1 (411), a second array of detector elements A2 (412), and a third array of detector elements A3 (413). The first array of detector elements A1 (411) comprises C1 columns and R1 rows, the second array of detector elements A2 (412) comprises C2 columns and R2 rows, and the third array of detector elements A3 (413) comprises C3 columns and R3 rows. The detector 410 comprises a first subarray (e.g., as shown by 412A in FIG. 4B) of C1 columns and R2 rows comprising detector elements shared by the first array of detector elements A1 (411) and the second array of detector elements A2 (412) where the first array of detector elements A1 (411) and the second array of detector elements A2 (412) overlap; and the detector 410 comprises a second subarray (e.g., as shown by 413A in FIG.4B) of C1 columns and R3 rows comprising detector elements shared by the first array of detector elements A1 (411) and the third array of detector elements A3 (413) where the ASTO-39600.601 first array of detector elements A1 (411) and the third array of detector elements A3 (413) overlap. As shown in FIG.4B, the second array of detector elements A2 (412) and the third array of detector elements A3 (413) is each divided into subarrays. In particular, the second array of detector elements A2 (412) shown in FIG. 4A comprises a subarray of detector elements 412A and a movable subarray of detector elements 412B as shown in FIG.4B, and the third array of detector elements A3 (413) shown in FIG.4A comprises a subarray of detector elements 413A and a movable subarray of detector elements 413B as shown in FIG. 4B. As shown in FIG.4B, the first movable subarray of detector elements 412B comprises (C2–C1) columns and R2 rows; and the second movable subarray of detector elements 413B comprises (C3–C1) columns and R3 rows. As shown in FIG.4A and FIG. 4B, the first movable subarray of detector elements 412B is a subarray of array A2 (412) and the second movable subarray of detector elements 413B is a subarray of array A3 (413). Further, e.g., as shown in FIG.4C, the detector 410 comprises a first axis of rotation 414 and a second axis of rotation 415. Rotation of the first movable subarray of detector elements 412B around the first axis of rotation 414 and rotation of the second movable subarray of detector elements 413B around the second axis of rotation 415 provides the detector 410 in a second configuration, e.g., as shown in FIG.4D. Shown in FIG.4D is the detector 410 provided in a second configuration. In the configuration shown in FIG. 4D, the detector has C1 columns and R1+R2+R3 rows. The detector 410 comprises the same number of detector elements in the first configuration and second configuration. The arrangement of detector elements and the placement in space of the detector elements is different for the detector 410 in the first configuration and in second configuration. FIG. 4E shows a top view of an embodiment of the detector 410 comprising a linear detector shape and an anti-scatter grid 450. The anti-scatter grid 450 comprises a sub-grid 450A and a sub-grid 450B. The sub-grid 450A is fixedly coupled to the subarray of detector elements 412A. The sub-grid 450B is fixedly coupled to the movable subarray of detector elements 412B. FIG.4B further shows the axis of rotation 414 of the detector 410. For simplicity, the other portions of the detector 410 that are shown in FIG.4A to 4D are not shown in FIG.4E although they are present. Upon rotating the movable subarray of detector elements 412B and sub-grid 450B fixed coupled thereto around the axis of rotation 414 to provide the detector 410 in the second configuration, the anti- scatter grid 450 provides an anti-scatter grid for the subarray of detector elements 412A ASTO-39600.601 and the movable subarray of detector elements 412B of the detector 410 in the second configuration. FIG. 4F shows a top view of an embodiment of the detector 410 comprising a curved detector shape and an anti-scatter grid 450. The anti-scatter grid 450 comprises a sub-grid 450A and a sub-grid 450B. The sub-grid 450A is fixedly coupled to the subarray of detector elements 412A. The sub-grid 450B is fixedly coupled to the movable subarray of detector elements 412B. FIG.4B further shows the axis of rotation 414 of the detector 410. For simplicity, the other portions of the detector 410 that are shown in FIG. 4A to 4D are not shown in FIG.4E although they are present. Upon rotating the movable subarray of detector elements 412B and sub-grid 450B fixed coupled thereto around the axis of rotation 414 to provide the detector 410 in the second configuration, the anti-scatter grid 450 provides an anti-scatter grid for the subarray of detector elements 412A and the movable subarray of detector elements 412B of the detector 410 in the second configuration. While FIG. 4A to 4F relate specifically to embodiments of the technology in which rotation of movable subarrays of detector elements transforms the detector between the first and second configurations, the technology is not limited to embodiments in which subarrays of detector elements are moved by rotations. Similarly to the embodiments shown in FIG.4A and FIG.4B that are transformable by rotating a subarray of detector elements as shown in FIG. 4C and FIG. 4D, the technology provides embodiments of detectors that are transformable between a first configuration and a second configuration by translating (420A and / or 420B) a subarray of detector elements as shown in FIG.4G and FIG.4H. Embodiments transformable by translation provide a detector 410 in a first configuration (e.g., in a configuration also shown in FIG. 1D and in FIGS.4A, 4B, and 4C) comprising a first array of detector elements A1 (411), a second array of detector elements A2 (412), and a third array of detector elements A3 (413). The first array of detector elements A1 (411) comprises C1 columns and R1 rows, the second array of detector elements A2 (412) comprises C2 columns and R2 rows, and the third array of detector elements A3 (413) comprises C3 columns and R3 rows. The detector 410 comprises a first subarray (e.g., as shown by 412A in FIG.4B) of C1 columns and R2 rows comprising detector elements shared by the first array of detector elements A1 (411) and the second array of detector elements A2 (412) where the first array of detector elements A1 (411) and the second array of detector elements A2 (412) overlap; and the detector 410 comprises a second subarray (e.g., as shown by 413A in FIG.4B) of C1 columns and R3 rows comprising ASTO-39600.601 detector elements shared by the first array of detector elements A1 (411) and the third array of detector elements A3 (413) where the first array of detector elements A1 (411) and the third array of detector elements A3 (413) overlap. As shown in FIG.4G, the second array of detector elements A2 (412) and the third array of detector elements A3 (413) is each divided into subarrays. In particular, the second array of detector elements A2 (412) shown in FIG. 4A comprises a subarray of detector elements 412A and a movable subarray of detector elements 412B as shown in FIG.4G, and the third array of detector elements A3 (413) shown in FIG. 4A comprises a subarray of detector elements 413A and a movable subarray of detector elements 413B as shown in FIG. 4G. As shown in FIG.4G, the first movable subarray of detector elements 412B comprises (C2–C1) columns and R2 rows; and the second movable subarray of detector elements 413B comprises (C3–C1) columns and R3 rows. As shown in FIG.4G and FIG.4H, the first movable subarray of detector elements 412B is a subarray of array A2 (412) and the second movable subarray of detector elements 413B is a subarray of array A3 (413). As shown in FIG.4G, the detector 410 comprises translation rails 416, 417, 418, and 419. Movable subarray of detector elements 412B is translatably coupled with subarray of detector elements 412A via the translation rail 416. Upon translation (e.g., vertical translation) of the movable subarray of detector elements 412B along the translation rail 416, the movable subarray of detector elements 412B becomes translatably coupled with subarray of detector elements 412A via translation rail 417. Translation (e.g., horizontal translation) of movable subarray of detector elements 412B along the translation rail 417 provides the detector 410 in the second configuration shown in FIG.4H. Similarly, movable subarray of detector elements 413B is translatably coupled with subarray of detector elements 413A via the translation rail 418. Upon translation (e.g., vertical translation) of the movable subarray of detector elements 413B along the translation rail 418, the movable subarray of detector elements 413B becomes translatably coupled with subarray of detector elements 413A via translation rail 419. Translation (e.g., horizontal translation) of movable subarray of detector elements 413B along the translation rail 419 provides the detector 410 in the second configuration shown in FIG. 4H. Reversing the process of translations (420A, 420B) for the movable subarrays 412B and 413B in the second configuration provides the detector 410 in the first configuration. Shown in FIG.4H is the detector 410 provided in a second configuration. In the configuration shown in FIG. 4H, the detector has C1 columns and R1+R2+R3 rows. The ASTO-39600.601 detector 410 comprises the same number of detector elements in the first configuration and second configuration. The arrangement of detector elements and the placement in space of the detector elements is different for the detector 410 in the first configuration and in second configuration. Translating (e.g., vertically and / or horizontally) movable subarrays as exemplified by FIG. 4G and FIG. 4H is applicable to embodiments of the detector having other arrangements and geometries such as the various arrangements and geometries described herein and shown in the figures. Thus, in some embodiments, the technology provides a configurable detector comprising a number of movable subarrays; and translating (e.g., vertically or horizontally) a number of movable subarrays transforms the detector between a first configuration and a second configuration. Additionally, while embodiments of the technology comprising an anti-scatter grid fixedly coupled to a movable subarray of detector elements are shown in FIG.4A to FIG. 4F and described with respect to the specific embodiment shown in FIG.4A to FIG. 4F, the technology is not limited to the embodiments shown in FIG.4A to FIG.4F or to the accompanying description. Any of the embodiments of detectors described herein may comprise an anti-scatter grid or sub-grids thereof fixedly coupled to static and / or movable sub-arrays of detector elements based on the principles and structures described for FIG.4A to 4H, including embodiments in which movable subarrays are transformed by rotation or by translation. In particular, static portions of detectors comprising a subarray of detector elements may be fixedly coupled to a sub-grid similarly to the exemplary sub-grid 450A that is fixedly coupled to the exemplary subarray of detector elements 412A as shown in FIG.4E and FIG.4F. Further, movable portions of detectors comprising a movable subarray of detector elements (e.g., rotatable around axis of rotation 414 or translatable along translation rails 416, 417, 418, and / or 419) may be fixedly coupled to a sub-grid similarly to the exemplary sub-grid 450B fixedly coupled to the exemplary movable subarray of detector elements 412B as shown in FIG.4E and FIG.4F. Thus, embodiments of the detector technology described herein should be understood optionally to include an anti-scatter grid or sub-grids thereof fixedly coupled to the detector or subarrays thereof. In some embodiments, e.g., as shown in FIG.1B and FIG.5, the technology provides a detector 510 comprising a first array of detector elements A1 (511), a second array of detector elements A2 (512), and a third array of detector elements A3 (513). The first array of detector elements A1 (511) comprises C1 columns and R1 rows, the second array of detector elements A2 (512) comprises C2 columns and R2 rows, and the third ASTO-39600.601 array of detector elements A3 (513) comprises C3 columns and R3 rows. The detector 510 comprises a first subarray (e.g., as shown by the gray, ascending hatched rectangle in FIG.1B) of C1 columns and R2 rows comprising detector elements shared by the first array of detector elements A1 (511) and the second array of detector elements A2 (512) where the first array of detector elements A1 (511) and the second array of detector elements A2 (512) overlap; and the detector 510 comprises a second subarray (e.g., as shown by the gray, descending hatched rectangle in FIG.1B) of C1 columns and R3 rows comprising detector elements shared by the first array of detector elements A1 (511) and the third array of detector elements A3 (513) where the first array of detector elements A1 (511) and the third array of detector elements A3 (513) overlap. For example, e.g., as shown in FIG. 6A, the technology provides a detector 610 in a first configuration that is configurable to provide the detector 610 in a second configuration (FIG.6D). Further, e.g., as shown in FIG. 6D, the technology provides a detector 610 in a second configuration that is configurable to provide the detector 610 in a first configuration (FIG.6A). In some embodiments, e.g., as shown in FIG.6A, the technology provides a detector 610 comprising one or more foldable portions. The detector 610 has a similar configuration to the detector shown in FIG.1D and the detector 410 shown in FIG. 4A– FIG. 4D. Further, the detector 610 may be configured in a number of different configurations. Accordingly, e.g., as shown in FIG. 6A, the detector 610 in a first configuration comprises a first array of detector elements A1 (611), a second array of detector elements A2 (612), and a third array of detector elements A3 (613). The first array of detector elements A1 (611) comprises C1 columns and R1 rows, the second array of detector elements A2 (612) comprises C2 columns and R2 rows, and the third array of detector elements A3 (613) comprises C3 columns and R3 rows. The detector 610 comprises a first subarray (e.g., as shown by 612A in FIG.6B) of C1 columns and R2 rows comprising detector elements shared by the first array of detector elements A1 (611) and the second array of detector elements A2 (612) where the first array of detector elements A1 (611) and the second array of detector elements A2 (612) overlap; and the detector 610 comprises a second subarray (e.g., as shown by 613A in FIG.6B) of C1 columns and R3 rows comprising detector elements shared by the first array of detector elements A1 (611) and the third array of detector elements A3 (613) where the first array of detector elements A1 (611) and the third array of detector elements A3 (613) overlap. ASTO-39600.601 As shown in FIG.6B, the second array of detector elements A2 (612) and the third array of detector elements A3 (613) is each divided into subarrays. In particular, the second array of detector elements A2 (612) shown in FIG. 6A comprises a subarray of detector elements 612A and a movable subarray of detector elements 612B, 612C as shown in FIG.6B, and the third array of detector elements A3 (613) shown in FIG. 6A comprises a subarray of detector elements 613A and a movable subarray of detector elements 613B, 613C as shown in FIG. 6B. As shown in FIG.6B, the first movable subarray of detector elements 612B, 612C comprises (C2–C1) columns and R2 rows; and the second movable subarray of detector elements 613B, 613C comprises (C3–C1) columns and R3 rows. As shown in FIG.6A and FIG.6B, the first movable subarray of detector elements 612B, 612C is a subarray of array A2 (612) and the second movable subarray of detector elements 613B, 613C is a subarray of array A3 (613). Furthermore, as shown in FIG.6B, the first movable subarray of detector elements 612B, 612C comprises the sub-subarray of detector elements 612B and the sub-subarray of detector elements 612C, and the second movable subarray of detector elements 613B, 613C comprises the sub-subarray of detector elements 613B and the sub-subarray of detector elements 613C. Further, e.g., as shown in FIG.6C, the detector 610 comprises a first axis of rotation 614, a second axis of rotation 615, a third axis of rotation 616, and a fourth axis of rotation 615. Coordinated movement of the first movable subarray of detector elements 612B, 612C comprises rotation of the sub-subarray of detector elements 612B around axis of rotation 614 and rotation of the sub-subarray of detector elements 612C around axis of rotation 616. Similarly, coordinated movement of the second movable subarray of detector elements 613B, 613C comprises rotation of the sub-subarray of detector elements 613B around axis of rotation 615 and rotation of the sub-subarray of detector elements 613C around axis of rotation 617. The coordinated movement of the first movable subarray of detector elements 612B, 612C and the second movable subarray of detector elements 613B, 613C provides the detector 610 in a second configuration, e.g., as shown in FIG. 6D. While embodiments provide a detector comprising a foldable portion (e.g., as provided by the first movable subarray of detector elements 612B, 612C comprising the sub-subarray of detector elements 612B and the sub-subarray of detector elements 612C and / or by the second movable subarray of detector elements 613B, 613C comprising the sub-subarray of detector elements 613B and the sub-subarray of detector elements ASTO-39600.601 613C) that comprises two sub-subarray segments, the technology is not limited to such configurations. Shown in FIG.6D is the detector 610 provided in a second configuration. In the configuration shown in FIG. 6D, the detector has C1 columns and R1+(2 × R2)+ (2 × R3) rows. The detector 610 comprises the same number of detector elements in the first configuration and second configuration. The arrangement of detector elements and the placement in space of the detector elements is different for the detector 610 in the first configuration and in second configuration. While embodiments provide a detector comprising a foldable portion (e.g., as provided by the first movable subarray of detector elements 612B, 612C and / or by the second movable subarray of detector elements 613B, 613C) that comprises two sub- subarray segments (e.g., as provided by the sub-subarray of detector elements 612B and the sub-subarray of detector elements 612C and / or by the sub-subarray of detector elements 613B and the sub-subarray of detector elements 613C), the technology is not limited to such configurations comprising two sub-subarray segments. Accordingly, embodiments provide detectors comprising a foldable portion comprising 2, 3, 4, 5, 6, 7, 8, 9, 10, or more sub-subarray segments and axes of rotation for moving the movable portions into positions that provide a rectangular array of detector elements. In some embodiments, the detector elements and / or detector modules described herein for use in the various embodiments of the photon detector described herein are provided by assembling tileable detector modules into the arrangements described herein and / or as shown in the figures. A detector module is capable of creating an independent signal indicative of the intensity of imaging radiation incident upon each pixel of the detector module. Detector modules are available as off-the-shelf components from commercial sources. For example, the X-Tile is a tileable medical CT detector module available from Detection Technology PLC. See, e.g., www.deetee.com / product / x- tile-ct-detector-module / . ams OSRAM also provides commercially available sensor chips that are tileable. In some embodiments, the detector modules are assembled together to create a photon detector panel of a custom size and / or a custom shape (e.g., as described herein and / or as shown in the figures). The resulting photon detector panel can thus be described as an array of detector modules, wherein each detector module is capable of producing a signal indicative of the intensity of imaging radiation incident upon each pixel of the detector module and of communicating the signal for each pixel to a processor. Each tileable detector module may comprise a number of detector elements ASTO-39600.601 (e.g., a direct detector element or an indirect detector element), a processor (e.g., a readout integrated circuit), and optionally a substrate. The detector modules are configured to convert photons (e.g., x-ray or gamma ray photons) into detectable electronic currents or voltages. Accordingly, a photon detector panel as described herein provides, in some embodiments, a CT detector. In some embodiments, the technology provides a detector comprising a number of areas, e.g., as shown in the figures. An exemplary detector, e.g., as shown in FIG. 1A, comprises a first array of detector elements A1 (gray square) and a second array of detector elements A2 (ascending hatched rectangle). The first array of detector elements A1 provides a multirow, multislice detector; and the second array of detector elements A2 provides a detector comprising a fewer number of rows. As one example, the multi- row detector (e.g., area A1) finds use in screening a patient for coronary artery calcification. See, e.g., Mahnken “Influence of a small field-of-view size on the detection of coronary artery calcifications with MSCT: in vitro and in vivo study” Eur Radiol 16: 358–64, incorporated herein by reference. In these cases, a small field of view (FOV) as provided by a configuration provided by the first array of detector elements A1 is appropriate for detecting calcifications. In some embodiments, a FOV used for screening a patient for coronary artery calcification is as small as 180 mm × 180 mm. In some embodiments (e.g., for obtaining medical images of the heart), a fast acquisition time is desirable. According to embodiments of the technology provided herein, a multirow region of the detector (e.g., the first array of detector elements A1) effectively provides a smaller pitch and fast acquisition times similar to a conventional multirow detector. Further, in some embodiments, the rotation time is decreased, which results in fewer helical artifacts and improved temporal resolution. Additionally, better image quality is provided for the same dose by lowering milliamps and the scan acquisition time. Accordingly, the technology provides a benefit of better image quality and lower dose by adjusting the tiling for smaller FOVs with multiple slices. In some embodiments, automatic exposure control (AEC) automatically adjusts these quantities to lower dose. The second array of detector elements A2 provides a detector with a fewer number of rows of detector elements, which provides an effectively higher pitch to reduce the patient dose. Without AEC or manual adjustments to other scan parameters, the patient dose is inversely proportional to pitch. Accordingly, the second array of detector elements A2 effectively provides a large FOV scan with low patient dose similar to a conventional single-slice scanner. As one example, the second array of detector elements ASTO-39600.601 A2 provides a wide single row of detectors that finds use in for simple lung scans where temporal resolution is less important. One of ordinary skill in the art understands that the field of view (FOV) is set by the arrangement of the detector used for acquiring image data. In particular, the FOV is defined at the slice through the isocenter. The area of the detectors (e.g., area A1 or A2 in FIG.1A) corrected back to the isocenter provides the FOV. For example, for heart imaging, one might use a small 180 mm × 180 mm FOV such as provided by area A1 in FIG. 1A. An arrangement of detector elements provided by area A2 provides an imaging technology similar to a single-slice scanner for which a helical scan will image a scan length times the width of the detectors corrected back to isocenter. Accordingly, the pitches used for the two imaging cases will be different. In some embodiments, an imaging system comprises the photon detector panel. In some embodiments, the imaging system comprises a processor, or controller, configured to receive the signals from each of the tileable detector modules (e.g., from each of the pixels) and produce, or reconstruct, an image (e.g., a CT) image based on the signals. In some embodiments, an anti-scatter grid is attached to each detector (e.g., each detector element). In some embodiments, the detectors move and the anti-scatter grid moves with the detectors. In some embodiments, the anti-scatter grid remains aligned for detectors comprising detector elements provided at a constant source to detector distance (SDD). However, as described herein, some embodiments of the detector comprise detector elements that are arranged at varying distances from the source. In those cases, the anti-scatter grid is not attached to each detector and the anti-scatter grid is displaced from the detector by a small distance. Accordingly, the detector then moves independently behind the anti-scatter grid. In some embodiments, portions of the detector move (e.g., rotate) with hinges about a corner. In some embodiments, portions of the detectors move along tracks into different configurations instead of rotating about a corner with hinges. Moving portions of the detector using tracks provides a technology associate with more compact movements. Image reconstruction Embodiments provide use of a non-rectangular detector as shown in FIG.1A–D, FIG.2, 4A–C, FIG. 5, and FIG.6A–C in CT scanning to obtain a CT image. In particular, embodiments provide use of a detector comprising a central segment (e.g., as shown by the gray-filled array A1 in FIG. 1A–1D, by the portion comprising 412A, 411, and 413A ASTO-39600.601 in FIG.4B and 4C, and by the portion comprising 612A, 611, and 613A in FIG.6B and 6C) and one or more (e.g., 1, 2, 3, 4, or more) laterally extending segments (e.g., as shown by the rectangular portions of FIG.1A–D that are hatched and not gray-filled, by 412B and 413B shown in FIG.4B and 4C, and by 612B, 612C and 613B, 613C shown in FIG. 6B and 6C). In some embodiments, the technology provides methods of obtaining x-ray image data, e.g., a CT scan image. For example, in some embodiments, e.g., as shown in FIG. 7A, the technology comprises obtaining x-ray image data (e.g., a CT scan image) by rotating 780 an x-ray source 710 and a detector 720 as described herein around a patient 730. In some embodiments, e.g., as shown in FIG. 7B, the technology comprises obtaining x-ray image data (e.g., a CT scan image) by rotating 780 a patient 730 between a static x-ray source 710 and a detector 720 as described herein. In some embodiments, e.g., as shown in FIG. 7C, the detector 720 moves 790 in a Z-direction while rotating 780 the patient 730 between the source 710 and detector 720 to obtain x- ray image data, e.g., a CT scan image. In some embodiments, e.g., as shown in FIG.7D, the patient 730 moves 790 in a Z-direction while rotating 780 the patient 730 between the source 710 and detector 720 to obtain x-ray image data, e.g., a CT scan image. Accordingly, embodiments provide methods for assembling an image of a portion of a patient using image data acquired during different times of the scan. In addition, embodiments provide methods for assembling an image of a portion of a patient using image data acquired during different times of the scan by different portions of the detector, e.g., by a central segment and / or one or more (e.g., 1, 2, 3, 4, or more) laterally extending segments. Data acquisition and image reconstruction are provided using conventional technologies (e.g., using conventional detector arrangements) except that image reconstruction accounts for changes in the detector location. Accordingly, the detector position is updated in the reconstruction algorithms, which is associated with minor changes to the methods used for image reconstruction that are known in the art. Additional detector configurations In some embodiments, the technology provides numerous configurations of detectors, e.g., as shown in FIGS.8–21. The embodiments of detectors shown in FIGS.8–21 comprise a central portion and a number of lateral portions extending from the central portion. Further, e.g., as shown in FIG 22A and FIG.22B and in FIG. 23A and FIG. 23B, the technology provides additional embodiments of configurable detectors. ASTO-39600.601 As shown in FIG.22A and FIG. 22B, the technology provides a configurable detector 2200 in a first configuration (FIG. 22A) that is configurable to provide the detector 2200 in a second configuration (FIG.22B). The configurable detector 2200 comprises an array of detector elements 2210A, 2210B, 2210C comprising a first subarray of detector elements 2210A, a second subarray of detector elements 2210B, and a third subarray of detector elements 2210C. Further, e.g., as shown in FIG.22A, the configurable detector 2200 comprises a first axis of rotation 2211 and a second axis of rotation 2212. Rotation of the first movable subarray of detector elements 2210A around the first axis of rotation 2211 and rotation of the second movable subarray of detector elements 2210C around the second axis of rotation 2212 provides the detector 2200 in a second configuration, e.g., as shown in FIG.4D. As shown in FIG.23A and FIG. 23B, the technology provides a configurable detector 2300 comprising one or more foldable portions. The detector 2300 has a similar configuration to the detector 2200 shown in FIG.22A and FIG. 22B. As shown in FIG. 23A, the configurable detector 2300 comprises an array of detector elements 2310A, 2310B, 2310C, 2310D, 2310E comprising a first subarray of detector elements 2310A, 2310B and a second subarray of detector elements 2310D, 2310E. Further, the first subarray of detector elements 2310A, 2310B comprises sub-subarray of detector elements 2310A and sub-subarray 2310B, and the second subarray of detector elements 2310D, 2310E comprises sub-subarray of detector elements 2310D and sub-subarray 2310E. Alternatively, the configurable detector 2300 can be described as having a first subarray of detector elements 2310A, a second subarray of detector elements 2310B, a third subarray of detector elements 2310C, a fourth subarray of detector elements 2310D, and a fifth subarray of detector elements 2310E. Further, the configurable detector 2300 comprises a first axis of rotation 2311, a second axis of rotation 2312, a third axis of rotation 2313, and a fourth axis of rotation 2314. Rotation of the sub- subarray 2310A around the second axis of rotation 2312, rotation of the sub-subarray 2310E around the third axis of rotation 2313, rotation of the sub-subarray 2310B (and sub-subarray 2310A) around the first axis of rotation 2311, and rotation of the sub- subarray 2310D (and sub-subarray 2310E) around the fourth axis of rotation 2314 provides the configurable detector 2300 in the second configuration shown in FIG.23B. Systems In some embodiments, e.g., as shown in FIG.7A–7C, the technology provides a system for imaging a patient. In some embodiments, systems comprise a source 710 and an ASTO-39600.601 embodiment of a detector 720 as described herein. In some embodiments, the source 710 is a static source. In some embodiments, systems comprise a patient 730. In some embodiments, the system for imaging a patient comprises a patient positioning system or patient positioning apparatus 740 for positioning a patient 730 with respect to the source 710 (e.g., a static source producing a medical imaging beam 750). In some embodiments, a patient 730 is positioned on the patient positioning system or patient positioning apparatus 740. In some embodiments, the patient positioning system or patient positioning apparatus 740 positions a patient 730 in a generally upright position with a torso aligned in a Z-direction (e.g., a vertical direction (e.g., standing, kneeling, sitting, perched, etc.)). In some embodiments, the system for imaging a patient comprises an x-ray beam 750 that contacts the patient 730 as the patient 730 is rotated 780 or as the source 710 and detector 720 are revolved around the patient 730. In some embodiments, the patient positioning system or patient positioning apparatus 740 rotates 780 and / or translates 790 the patient 730 (e.g., an upright patient) between the source 710 and detector 720 to provide acquisition of an image (e.g., a CT image). In some embodiments, the system for imaging a patient comprises a patient positioning system 740 as described in U.S. Pat. App. Ser. No.63 / 237,513 or a patient positioning apparatus 740 as described in U.S. Pat. App. Pub. No.20200268327, each of which is incorporated herein by reference. In some embodiments, the patient positioning system or patient positioning apparatus 740 stabilizes and supports a patent 730 in an upright or generally upright position with a torso aligned in a Z-direction (e.g., a vertical direction (e.g., standing, kneeling, sitting, perched, etc.)). While FIG.7A and FIG.7B show revolution and rotation 780, respectively, in a clockwise direction, the technology is not limited to clockwise revolution and rotation. The technology includes embodiments in which the patient positioning system or patient positioning apparatus 740 and patient 730 are rotated in an anticlockwise direction and / or in which the source 710 and detector 720 are revolved around the patient in an anticlockwise direction. Some embodiments of the technology provided herein further comprise functionalities for collecting, storing, and / or analyzing data. For example, in some embodiments systems comprises a microprocessor, a memory, and / or a database for, e.g., storing and executing instructions, analyzing data, performing calculations using the data, transforming the data, and storing the data. Moreover, in some embodiments a microprocessor is configured to control the source, rotation of the patient and / or revolution of the source and detector, and / or translation of the patient. In some embodiments, the microprocessor is used to initiate and / or terminate image acquisition. ASTO-39600.601 In some embodiments, the device comprises a user interface (e.g., a keyboard, buttons, dials, switches, and the like) for receiving user input that is used by the microprocessor to provide input into the system. In some embodiments, the device further comprises a data output for transmitting data to an external destination, e.g., a computer, a display, a network, and / or an external storage medium. Some embodiments provide that the device is a small, handheld, portable device incorporating these features and components. Methods In some embodiments, the technology provided herein relates to methods. In some embodiments, the technology provides methods of obtaining a medical image (e.g., of a patient). For example, in some embodiments, methods comprise providing a detector as described herein (e.g., a photon (e.g., x-ray) detector comprising one or more arrays of detector elements provided in arrangements as described herein); and imaging a patient using a signal output by the detector. In some embodiments, methods comprise providing a configurable detector as described herein (e.g., a photon (e.g., x-ray) detector comprising one or more arrays of detector elements and that is transformable from a first configuration to a second configuration and from the second configuration to the first configuration); and imaging a patient using a signal output by the configurable detector. In some embodiments, methods relating to a configurable detector further comprise transforming the configurable detector from a first configuration to a second configuration or transforming the configurable detector from a second configuration to a first configuration. In some embodiments, methods comprising transforming the configurable detector comprise moving (e.g., rotating and / or translating) a movable subarray of detector elements. Accordingly, in some embodiments, methods comprise providing a configurable detector comprising a movable subarray of detector elements; rotating the movable subarray of detector elements; and obtaining a signal from the configurable detector. In some embodiments, methods comprise providing a configurable detector comprising a movable subarray of detector elements; translating the movable subarray of detector elements; and obtaining a signal from the configurable detector. In some embodiments, methods comprise providing a detector as described herein and obtaining a signal from a multirow region of the detector for use in imaging a patient heart. In some embodiments, methods comprise providing a detector as described herein and obtaining a signal from a region having fewer rows than the multirow region (e.g., in some embodiments, a single row region) for use in imaging a ASTO-39600.601 patient lung. Accordingly, in some embodiments, methods described herein relate to imaging a patient heart and / or a patient lung. In some embodiments, the detector comprises an anti-scatter grid. In some embodiments, the configurable detector comprises an anti-scatter grid. In some embodiments, the anti-scatter grid is fixedly coupled to the detector. In some embodiments, the anti-scatter grid is fixedly coupled to the configurable detector. In some embodiments, the anti-scatter grid is not fixedly coupled to the detector. In some embodiments, the anti-scatter grid is not fixedly coupled to the configurable detector. Although the disclosure herein refers to certain illustrated embodiments, it is to be understood that these embodiments are presented by way of example and not by way of limitation. Examples Example 1 – Palanquin detector arrangement #1 During the development of embodiments of the technology provided herein, a detector was designed as described herein. Detectors are constructed using X -Tile detector modules (Detection Technology PLC; www.deetee.com / product / x-tile-ct-detector- module / ). The detector was designed with the configuration shown in FIG.24 (a “palanquin” arrangement, e.g., as shown also in FIG.1B, FIG.5, and FIG.11). In particular, the palanquin design comprised a central portion of 112 x-ray detector rows (384 columns) providing a 7 cm by 24 cm field of view; and comprised two laterally extending portions each comprising 16 rows of x-ray detectors providing a 72-cm field of view. See FIG.24. The central portion of the palanquin detector had a pitch of 1 and the lateral portions were spaced to provide a pitch of less than 4 (e.g., 3.5). In particular, the lateral portions were offset by 20 rows from the top and bottom of the central portion and were spaced 40 rows apart from each other. The exemplary palanquin detector shown in FIG.24 is produced using 180 x-ray detector modules at an approximate cost of $180,000. The palanquin design is designed to collect data for a CT image at a desired scan height, scan length, pitch, and revolutions per minute (RPM) using an integral number of x-ray detector modules. Further, the design considered minimizing cost of the palanquin detector by preferring designs comprising fewer x-ray detector modules. In particular, the exemplary palanquin detector shown in FIG. 24 was designed for a scan height of 21 cm at the isocenter, a rotation speed of 360 RPM (e.g., 6 revolutions / second), ASTO-39600.601 and a scan length of 0.5 seconds (e.g., to provide a scan within a time of approximately half a human heartbeat). Using these parameters, 3 revolutions provide image data covering the 21-cm scan height. Example 2 – Palanquin detector arrangement #2 During the development of embodiments of the technology provided herein, a detector was designed as described herein. The detector was designed with the configuration shown in FIG.25 (a “palanquin” arrangement, e.g., as shown also in FIG.1B, FIG.5, and FIG. 11). In particular, the palanquin design comprised a central portion of 112 x- ray detector rows (320 columns) providing a 7 cm by 20 cm field of view; and comprised two laterally extending portions each comprising 16 rows of x-ray detectors providing a 64-cm field of view. See FIG. 25. The central portion of the palanquin detector had a pitch of 1 and the lateral portions were spaced to provide a pitch of less than 4 (e.g., 3.5). In particular, the lateral portions were offset by 20 rows from the top and bottom of the central portion and were spaced 40 rows apart from each other. The exemplary palanquin detector shown in FIG. 25 is produced using 142 x-ray detector modules at an approximate cost of $142,000. The palanquin design is designed to collect data for a CT image at a desired scan height, scan length, pitch, and revolutions per minute (RPM) using an integral number of x-ray detector modules. Further, the design considered minimizing cost of the palanquin detector by preferring designs comprising fewer x-ray detector modules. In particular, the exemplary palanquin detector shown in FIG. 25 was designed for a scan height of 21 cm at the isocenter, a rotation speed of 360 RPM (e.g., 6 revolutions / second), and a scan length of 0.5 seconds (e.g., to provide a scan within a time of approximately half a human heartbeat). Using these parameters, 3 revolutions provide image data covering the 21-cm scan height. All publications and patents mentioned in the above specification are herein incorporated by reference in their entirety for all purposes. Various modifications and variations of the described compositions, methods, and uses of the technology will be apparent to those skilled in the art without departing from the scope and spirit of the technology as described. Although the technology has been described in connection with specific exemplary embodiments, it should be understood that the invention as claimed should not be unduly limited to such specific embodiments. Indeed, various modifications of the described modes for carrying out the invention that are obvious to those skilled in the art are intended to be within the scope of the following claims.

Claims

ASTO-39600.601 CLAIMS WE CLAIM:

1. A photon detector comprising: a first array of photon detector elements having R1 rows and C1 columns and a second array of photon detector elements having R2 rows and C2 columns, wherein C2 > C1 and R1 > R2.

2. The photon detector of claim 1, wherein a shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements.

3. The photon detector of claim 1, wherein R1 is equal to or greater than 100.

4. The photon detector of claim 1, wherein R2 is less than 50.

5. The photon detector of claim 1, wherein R1 is 64, 128, 160, 192, or 256; and / or R2 is 16 or 32.

6. The photon detector of claim 1, wherein said first array provides a field of view of 10–50 cm and said second array provides a field of view of 50–200 cm.

7. The photon detector of claim 1, wherein C2 = C1 × n, where n is a positive integer.

8. The photon detector of claim 1 comprising a movable subarray of photon detector elements.

9. The photon detector of claim 8, wherein the movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns.

10. The photon detector of claim 8, wherein the movable subarray of photon detector elements is configured to be movable from a first position to a second position.ASTO-39600.601 11. The photon detector of claim 8, wherein the movable subarray of photon detector elements is configured to be movable by rotation or translation of said movable subarray from a first position to a second position.

12. The photon detector of claim 8, wherein the movable subarray of photon detector elements is configured to be movable by rotation of said movable subarray around an axis of said movable subarray of photon detector elements or by translation of said movable subarray along a translation rail translatably coupled to said movable subarray of photon detector elements.

13. The photon detector of claim 1, wherein said photon detector elements are x-ray detector elements.

14. A photon detector comprising: a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3.

15. The photon detector of claim 14, wherein R2 = R3 and / or C2 = C3.

16. The photon detector of claim 14, wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by said first array of photon detector elements and said third array of photon detector elements.

17. The photon detector of claim 14, wherein R1 is equal to or greater than 100.

18. The photon detector of claim 14, wherein R2 and / or R3 is less than 50.

19. The photon detector of claim 14, wherein: R1 is 64, 128, 160, 192, or 256; and / orASTO-39600.601 R2 and / or R3 is 16 or 32.

20. The photon detector of claim 14, wherein said first array provides a field of view of 10–50 cm and the combined field of view of said second array and said third array is 50–200 cm.

21. The photon detector of claim 14, wherein C2 = C1 × n1 and / or C3 = C1 × n2, where each of n1 and n2 is a positive integer.

22. The photon detector of claim 14, wherein C2 = C3.

23. The photon detector of claim 14 comprising a movable subarray of photon detector elements.

24. The photon detector of claim 23, wherein the movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns and / or comprises R3 rows and (C3 – C1) columns.

25. The photon detector of claim 23, wherein the movable subarray of photon detector elements is configured to be movable from a first position to a second position.

26. The photon detector of claim 23, wherein the movable subarray of photon detector elements is configured to be movable by rotation or translation of said movable subarray from a first position to a second position.

27. The photon detector of claim 23, wherein the movable subarray of photon detector elements is configured to be movable by rotation of said movable subarray around an axis of said movable subarray of photon detector elements or by translation of said movable subarray along a translation rail translatably coupled to said movable subarray of photon detector elements 28. The photon detector of claim 14 comprising a first movable subarray of photon detector elements and a second movable subarray of photon detector elements.ASTO-39600.601 29. The photon detector of claim 28, wherein the first movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns and said second movable subarray of photon detector elements comprises R3 rows and (C3 – C1) columns.

30. The photon detector of claim 28, wherein the first movable subarray of photon detector elements is configured to be movable from a first position to a second position and the second movable subarray of photon detector elements is configured to be movable from a third position to a fourth position.

31. The photon detector of claim 28, wherein the first movable subarray of photon detector elements is configured to be movable by rotation of said first movable subarray from a first position to a second position and the second movable subarray of photon detector elements is configured to be movable by rotation of said second movable subarray from a third position to a fourth position.

32. The photon detector of claim 28, wherein the first movable subarray of photon detector elements is configured to be movable by rotation of said first movable subarray around a first axis of said first movable subarray of photon detector elements and the second movable subarray of photon detector elements is configured to be movable by rotation of said second movable subarray around a second axis of said second movable subarray of photon detector elements.

33. The photon detector of claim 14, wherein said photon detector elements are x-ray detector elements.

34. A configurable photon detector configured to be transformable between a first configuration comprising photon detector elements and a second configuration comprising said photon detector elements.

35. The configurable photon detector of claim 34, wherein said first configuration comprises a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns,ASTO-39600.601 wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3.

36. The configurable photon detector of claim 35, wherein R2 = R3 and / or C2 = C3.

37. The configurable photon detector of claim 35, wherein: a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements; and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by said first array of photon detector elements and said third array of photon detector elements.

38. The configurable photon detector of claim 35, wherein R1 is equal to or greater than 100.

39. The configurable photon detector of claim 35, wherein R2 and / or R3 is less than 50.

40. The configurable photon detector of claim 35, wherein: R1 is 64, 128, 160, 192, or 256; and / or R2 and / or R3 is 16 or 32.

41. The configurable photon detector of claim 35, wherein said first array provides a field of view of 10–50 cm and the combined field of view of said second array and said third array is 50–200 cm.

42. The configurable photon detector of claim 35, wherein C2 = C1 × n1 and / or C3 = C1 × n2, where each of n1 and n2 is a positive integer.

43. The configurable photon detector of claim 35, wherein C2 = C3.

44. The configurable photon detector of claim 35, wherein said second configuration comprises a fourth array of said photon detector elements having R1 + (m1 × R2) + (m2 × R3) rows and C1 columns, wherein each of m1 and m2 is a positive integer.ASTO-39600.601 45. The configurable photon detector of claim 44, wherein ((C2 / C1) – 1)) = m1 = m2.

46. The configurable photon detector of claim 44, wherein said fourth array provides a field of view of 10–50 cm.

47. The configurable photon detector of claim 34, wherein said configurable photon detector is transformable between said first configuration and said second configuration by transforming a first movable subarray of photon detector elements and transforming a second movable subarray of photon detector elements.

48. The configurable photon detector of claim 34, wherein said configurable photon detector is transformable between said first configuration and said second configuration by rotating a first movable subarray of photon detector elements and rotating a second movable subarray of photon detector elements.

49. The configurable photon detector of claim 47, wherein the first movable subarray of photon detector elements is configured to be movable by rotation of said first movable subarray around a first axis of said first movable subarray of photon detector elements and the second movable subarray of photon detector elements is configured to be movable by rotation of said second movable subarray around a second axis of said second movable subarray of photon detector elements.

50. The configurable photon detector of claim 47, wherein said first configuration comprises: a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements; and a second shared subarray of photon detector elements having C1 columns and R3 rows isASTO-39600.601 shared by said first array of photon detector elements and said third array of photon detector elements.

51. The configurable photon detector of claim 50, wherein said first movable subarray of photon detector elements comprises (R2 × (C2 – C1)) photon detector elements and said second movable subarray of photon detector elements comprises (R3 × (C3 – C1)) photon detector elements.

52. The configurable photon detector of claim 50, wherein said first movable subarray of photon detector elements comprises R2 rows and (C2 – C1) columns and said second movable subarray of photon detector elements comprises R3 rows and (C3 – C1) columns.

53. The configurable photon detector of claim 50, wherein said first movable subarray of photon detector elements comprises a first plurality of m1 sub- subarrays and said second movable subarray of photon detector elements comprises a second plurality of m2 sub-subarrays.

54. The configurable photon detector of claim 53, wherein each sub-subarray of the first plurality of m1 sub-subarrays comprises R2 rows and (C2 / m1) columns and wherein each sub-subarray of the second plurality of m2 sub-subarrays comprises R3 rows and (C3 / m2) columns.

55. The configurable photon detector of claim 53, wherein transforming said first movable subarray of photon detector elements comprises rotating each sub- subarray of the first plurality of m1 sub-subarrays and transforming said second movable subarray of photon detector elements comprises rotating each sub- subarray of the second plurality of m2 sub-subarrays.

56. The configurable photon detector of claim 55, wherein rotating each sub-subarray of the first plurality of m1 sub-subarrays comprises and / or rotating each sub- subarray of the second plurality of m2 sub-subarrays comprises rotating adjacent sub-subarrays in opposite directions.ASTO-39600.601 57. The configurable photon detector of claim 55, wherein rotating each sub-subarray of the first plurality of m1 sub-subarrays comprises rotating m1 sub-subarrays in a first direction of rotation and rotating (m1 – 1) sub-subarrays in a second direction of rotation, wherein said first direction of rotation and said second direction of rotation are in opposite directions; and / or wherein rotating each sub- subarray of the second plurality of m2 sub-subarrays comprises rotating m2 sub- subarrays in a first direction of rotation and rotating (m2 – 1) sub-subarrays in a second direction of rotation, wherein said first direction of rotation and said second direction of rotation are in opposite directions.

58. The configurable photon detector of claim 34, wherein said photon detector elements are x-ray detector elements.

59. A photon detector comprising: a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by said first array of photon detector elements and said third array of photon detector elements; and wherein said first array and said second array are aligned at one edge and said first array and said third array are aligned at one edge.

60. The photon detector of claim 59, wherein a first edge of said first array and one edge of said second array are aligned and a second edge of said first array and one edge of said third array are aligned.

61. The photon detector of claim 60, wherein said first edge of said first array is a row edge, said one edge of said second array is a row edge, said second edge of said first array is a row edge, and said one edge of said third array is a row edge.ASTO-39600.601 62. The photon detector of claim 60, wherein said first edge of said first array is a top edge, said one edge of said second array is a top edge, said second edge of said first array is a bottom edge, and said one edge of said third array is a bottom edge.

63. A photon detector comprising: a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by said first array of photon detector elements and said third array of photon detector elements; and wherein said first array and said second array are aligned at two edges and said first array and said third array are aligned at two edges.

64. The photon detector of claim 63, wherein a first edge of said first array and a first edge of said second array are aligned, a second edge of said first array and a second edge of said second array are aligned, a third edge of said first array and a first edge of said third array are aligned, and a fourth edge of said first array and a second edge of said third array are aligned.

65. The photon detector of claim 64, wherein said first edge of said first array is a row edge, said first edge of said second array is a row edge, said second edge of said first array is a column edge, said second edge of said second array is a column edge, said third edge of said first array is a row edge, said first edge of said third array is a row edge, said fourth edge of said first array is a column edge, and said second edge of said third array is a column edge.ASTO-39600.601 66. The photon detector of claim 64, wherein said first edge of said first array is a top edge, said first edge of said second array is a top edge, said second edge of said first array is a left edge, said second edge of said second array is a left edge, said third edge of said first array is a bottom edge, said first edge of said third array is a bottom edge, said fourth edge of said first array is a right edge, and said second edge of said third array is a right edge.

67. A photon detector comprising: a first array of photon detector elements having R1 rows and C1 columns, a second array of photon detector elements having R2 rows and C2 columns, and a third array of photon detector elements having R3 rows and C3 columns, wherein C2 > C1, C3 > C1, R1 > R2, and R1 > R3; and wherein a first shared subarray of photon detector elements having C1 columns and R2 rows is shared by said first array of photon detector elements and said second array of photon detector elements and a second shared subarray of photon detector elements having C1 columns and R3 rows is shared by said first array of photon detector elements and said third array of photon detector elements; and wherein said first array and said second array are aligned at zero edges and said first array and said third array are aligned at zero edges.

68. A system comprising a photon detector of claim 1.

69. The system of claim 68 further comprising a source.

70. The system of claim 68 further comprising a patient positioning system.

71. The system of claim 68 further comprising a patient.

72. The system of claim 68 further comprising a software component configured to receive signals from the photon detector and produce an image.

73. A system comprising a photon detector of claim 14.ASTO-39600.601 74. The system of claim 68 further comprising a source.

75. The system of claim 68 further comprising a patient positioning system.

76. The system of claim 68 further comprising a patient.

77. The system of claim 68 further comprising a software component configured to receive signals from the photon detector and produce an image.

78. A system comprising a configurable photon detector of claim 34.

79. The system of claim 78 further comprising a source.

80. The system of claim 78 further comprising a patient positioning system.

81. The system of claim 78 further comprising a patient.

82. The system of claim 78 further comprising a software component configured to receive signals from the photon detector and produce an image.

83. A system comprising a photon detector of claim 59.

84. The system of claim 83 further comprising a source.

85. The system of claim 83 further comprising a patient positioning system.

86. The system of claim 83 further comprising a patient.

87. The system of claim 83 further comprising a software component configured to receive signals from the photon detector and produce an image.

88. A system comprising a configurable photon detector of claim 63.

89. The system of claim 63 further comprising a source.ASTO-39600.601 90. The system of claim 63 further comprising a patient positioning system.

91. The system of claim 63 further comprising a patient.

92. The system of claim 63 further comprising a software component configured to receive signals from the photon detector and produce an image.

93. A system comprising a configurable photon detector of claim 67.

94. The system of claim 93 further comprising a source.

95. The system of claim 93 further comprising a patient positioning system.

96. The system of claim 93 further comprising a patient.

97. The system of claim 93 further comprising a software component configured to receive signals from the photon detector and produce an image.

98. A method for obtaining a medical image, said method comprising: providing a photon detector comprising: a first array of photon detector elements having R1 rows and C1 columns; and a second array of photon detector elements having R2 rows and C2 columns, wherein C2 > C1 and R1 > R2; contacting a patient with a photon beam produced by a source; and obtaining a signal from the photon detector.

99. The method of claim 98, further comprising constructing an image of a portion of the patient using the signal.

100. The method of claim 98, wherein the photon beam contacts the patient heart.

101. The method of claim 98, wherein the photon beam contacts the patient lung.

102. The method of claim 99, wherein the image is an image of the patient heart.ASTO-39600.601 103. The method of claim 99, wherein the image is an image of the patient lung.

104. The method of claim 98, wherein the photon detector comprises a plurality of subarrays of detector elements and the signal is provided by a subarray of detector elements of the photon detector.

105. The method of claim 104, wherein the subarray comprises multiple rows of detector elements.

106. The method of claim 104, wherein the subarray comprises one row of detector elements.

107. A method for obtaining a medical image, said method comprising: providing a configurable photon detector configured to be transformable between a first configuration comprising photon detector elements and a second configuration comprising said photon detector elements; contacting a patient with a photon beam produced by a source; and obtaining a signal from the photon detector.

108. The method of claim 107 further comprising transforming the configurable photon detector from a first configuration to a second configuration.

109. The method of claim 108, wherein said transforming comprises rotating a subarray of detector elements.

110. The method of claim 108, wherein said transforming comprises translating a subarray of detector elements.

111. The method of claim 107, further comprising constructing an image of a portion of the patient using the signal.

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