Detector and ray detection device

Abstract

The present invention relates to a detector and a ray detection device. The detector includes: a first detection board, including a first circuit board and a first photosensitive area disposed on the first circuit board and constituting at least one end of the first detection board, the first photosensitive area having a plurality of first photosensitive elements for detecting a first ray, and three sides of the end of the first detection board where the first photosensitive area is located coincide with three sides of at least one end of the first circuit board, forming an end coincidence detection area.

Description

Technical Field

[0001] The present invention relates to radiation detection technology, and particularly to computed tomography technology and radiation scanning imaging detection technology. Background Art

[0002] In existing detectors, the photosensitive elements are usually arranged in the middle area of the circuit board. The photosensitive elements span across the circuit board and their two ends coincide with the edges of the circuit board, while the distances from the other two sides to the edges of the circuit board are relatively far. Such detectors are not applicable to ray detection devices with a detector and a ray source arranged on the same side. Summary of the Invention

[0003] In consideration of the above problems, the purpose of the present invention is to provide a detector that can be applicable to ray detection devices with a detector and a ray source arranged on the same side.

[0004] One aspect of the present invention relates to a detector, including: a first detection board, including a first circuit board and a first photosensitive area provided on the first circuit board and constituting at least one end of the first detection board. The first photosensitive area has a plurality of first photosensitive elements for detecting a first ray. Three sides of the end of the first detection board where the first photosensitive area is located coincide with three sides of at least one end of the first circuit board, forming an end-coincidence detection area.

[0005] According to the above, a detector with photosensitive elements at the end is formed, which can be well applicable to ray detection devices with a detector and a ray source arranged on the same side.

[0006] The detector according to the above further includes a second detection board, including a second circuit board and a second photosensitive area provided on the second circuit board and constituting at least one end of the second detection board. The second photosensitive area has a plurality of second photosensitive elements for detecting a second ray; and a carrier board located between the first detection board and the second detection board; and a filter sheet carried by the carrier board and located on the path of the second ray transmitted through the first detection board.

[0007] For the detector according to the above aspect, wherein the first detection board, the carrier board, and the second detection board are formed into a rectangle. At at least one end of the first detection board, three edges of the first circuit board coincide with three edges of the first photosensitive area provided on the first circuit board. At at least one end of the second detection board, three edges of the second circuit board coincide with three edges of the second photosensitive area provided on the second circuit board. Three edges of at least one end of the first detection board and three edges of at least one end of the second detection board coincide with three edges of at least one end of the carrier board, forming the end-coincidence detection area.

[0008] The detector according to the above manner, wherein the first detection plate, the carrier plate, and the detection plate are stacked, and the end coincidence detection regions are formed at least at opposite ends of the stacked structure.

[0009] The detector according to the above, wherein the first detection plate, the carrier plate, and the second detection plate are stacked, and the coincidence regions are formed at all ends of the stacked structure.

[0010] The detector according to the above, wherein the filter is bonded above the carrier plate.

[0011] The detector according to the above, wherein the thickness of the filter is 0.5 mm or more.

[0012] The detector according to the above, wherein the filter has different thicknesses according to different detection regions.

[0013] The detector according to the above, wherein multiple layers of filters are provided.

[0014] The detector according to the above, wherein the energy of the second ray is higher than that of the first ray.

[0015] Another aspect of the present invention provides a ray detection device, comprising: the detector according to any one of the above; and a ray source, the rays emitted by which are emitted at a certain angle close to the edge of adjacent detectors on the same side and are received by the opposite detectors.

[0016] The ray detection device according to the above, wherein the detector and the ray source are respectively formed in a ring shape.

[0017] According to the above, the detector provided by the present invention can be well applied to a ray detection device in which a detector and a ray source are provided on the same side. In addition, according to the ray detection device provided by the present invention, the data quality can be improved. Description of the Drawings

[0018] Figure 1 is a perspective view of an example of the detector;

[0019] Figure 2 is another exploded perspective view of the detector;

[0020] Figure 3 is Figure 2 a top view of the detector shown;

[0021] Figure 4 is a first schematic diagram of the distribution of the photosensitive area of the detector;

[0022] Figure 5 is a second schematic diagram of the distribution of the photosensitive area of the detector;

[0023] Figure 6 It is the third example distribution schematic diagram of the photosensitive area of the detector;

[0024] Figure 7 It is the fourth example distribution schematic diagram of the photosensitive area of the detector;

[0025] Figure 8 It is the fifth example distribution schematic diagram of the photosensitive area of the detector;

[0026] Figure 9 It is an example schematic diagram of the annular detection optical path;

[0027] Figure 10 It is a partial schematic diagram of the annular detection optical path. Detailed implementation manners

[0028] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only for providing a better understanding of the present invention by showing examples of the present invention.

[0029] As an embodiment, Figure 1 It is a perspective view of an example of the detector. The detector is a mono - energy detector, including a photosensitive part 100 and a circuit board 200. The photosensitive part 100 is composed of photosensitive elements and is arranged on the circuit board 200, forming at least one end of the detector. The photosensitive elements detect the rays emitted by the ray source. Three sides of the photosensitive part 100 coincide with three sides of one end of the circuit board 200, forming an end - coincidence detection area. The rays emitted by the ray source are detected by the photosensitive part 100, and the detection signals are collected by the circuit board 200.

[0030] In Figure 1 example, the photosensitive part 100 can also be formed at multiple ends of the circuit board 200, forming multiple end - coincidence detection areas.

[0031] As another embodiment of the present invention, Figure 1 It is another perspective view of the split detector, Figure 2 is Figure 1 the top view of the detector shown. Below, as an example, with reference to Figure 1 and Figure 2 the detector shown, it will be described in detail.

[0032] The detector is a dual-energy detector, comprising a high-energy plate 1, a carrier plate 3, a filter 4 and a low-energy plate 6. The high-energy plate 1, the carrier plate 3, the filter 4 and the low-energy plate 6 are overlapped in sequence.

[0033] The high-energy board 1 includes a high-energy photosensitive area arranged on a high-energy circuit board to constitute the left end of the high-energy board 1, and high-energy photosensitive elements capable of detecting high-energy rays are arranged throughout the left end. The high-energy board 1 is rectangular in shape when viewed from above, and the high-energy ray photosensitive elements are located in a rectangular area defined by three edges of the end of the rectangular high-energy board 1, that is, the high-energy circuit board of the high-energy board 1 and the high-energy photosensitive area are completely overlapped in a rectangular area defined by one side in the width direction and a part of the adjacent long side.

[0034] The carrier plate 3 is arranged above the high-energy plate 1. The carrier plate is also rectangular in shape, and the three edges of one end overlap with the three edges of the end where the high-energy photosensitive area of ​​the high-energy plate 1 is located. Figure 2 It is observed that the three edges of the high energy photosensitive area of ​​the high energy board 1 have continuous overlapping parts with the three edges of the carrier board 3. Here, the carrier board 3 is usually made of a printed circuit board.

[0035] The filter 4 is located on the carrier 3 and in the overlapped region. The filter 4 is supported by the carrier 3. Here, the filter 4 is described as being composed of a copper sheet. Figure 1 The filter sheet 4 is shown as being in a strip shape and dispersed, but the filter sheet can also be an integral piece, that is, a complete piece. The filter sheet 4 can be fixed on the carrier 3 by gluing. When the copper sheet is pasted on the carrier 3 by gluing, the thickness of the copper sheet can be more than 0.5 mm. Furthermore, when the copper sheet is pasted on the carrier 3 by gluing, the thickness of the copper sheet can be more than 1 mm.

[0036] The low-energy board 6 is disposed above the carrier board 3 through a filter. The low-energy board 6 includes a low-energy photosensitive area disposed on the low-energy circuit board to form the left end, and low-energy photosensitive elements capable of detecting low-energy rays are arranged throughout the left end. The low-energy board 6 is formed into a rectangular shape when viewed from above. One end where the low-energy photosensitive element is disposed is located above the above-mentioned overlap area and overlaps with the above-mentioned overlap area. Figure 2 In a plan view, three sides of one end of the low-energy photosensitive area of ​​the low-energy plate 6 overlap with three sides of the overlapping area of ​​the high-energy plate and the carrier plate, thereby forming an end overlap detection area.

[0037] In addition, by arranging a copper sheet as a filter between the high-energy photosensitive area and the low-energy photosensitive area, the performance of the high-energy photosensitive element can be improved. Furthermore, the copper sheet is not combined with the carrier by an embedded method, but is fixed to a separate carrier by pasting, etc., which gets rid of the limitation of the embedded process on the thickness of the copper sheet. It also allows the filter copper sheet to be replaced and maintained during use.

[0038] Therefore, from top to bottom, a three-sided coincidence region where the low-energy plate 6, the filter 4, the carrier plate 3, and the low-energy plate 1 coincide on three sides is formed at one end. As Figure 3 shown, in the photosensitive region where the three sides coincide, the low-energy photosensitive region, the filter, the carrier plate, and the high-energy photosensitive region are formed in sequence. This structure improves the applicability to a ray detection device with a detector and a ray source arranged on the same side. Moreover, since the detectors of the above structure are designed with edge coincidence, it is easy to dock the detectors with each other, thereby ensuring the continuity of the photosensitive elements and the integrity of the data.

[0039] As Figure 2 shown, in this embodiment, the low-energy plate 6, the carrier plate 3, and the low-energy plate 1 are fixedly connected by double-pass hexagon studs 6 and screws 7. Since there is a filter 4 between the low-energy plate 6 and the carrier plate 3, a spacer 5 is correspondingly arranged above the carrier plate 3, and the screw 6 passes through the through hole of the spacer 5 and is screwed into the double-pass hexagon stud 2.

[0040] By constructing the detector as described above, the rays from the ray source first hit the low-energy plate 6, the low-energy photosensitive elements in the low-energy plate 6 detect the low-energy rays, and the low-energy circuit board obtains the detection signal. The incident rays pass through the filter 4 to filter out the low-energy rays, and the high-energy rays pass through the filter 4 and are incident on the high-energy photosensitive elements of the high-energy plate 1. The high-energy photosensitive elements detect the high-energy rays, and the high-energy circuit board obtains the detection signal. Thus, the performance of the high-energy photosensitive elements can be improved.

[0041] Optionally, the shape of each layer in the above embodiment is not limited to a rectangle. As long as an end coincidence detection region is formed at the end and it is easy to join each other, any shape can be used.

[0042] Optionally, the filter in the above embodiment is not limited to a copper sheet. As long as it can achieve the filtering function and ultimately improve the performance of the high-energy photosensitive elements, any material can be used.

[0043] Optionally, the filter in the above embodiment is not limited to the same thickness, and different thicknesses can also be configured in different regions.

[0044] In addition, optionally, in the above embodiment, the fixing of the filter is not limited to gluing, and other methods such as using snaps, connectors for fixing, etc. can also be used, or it can be replaced by the form of embedding a single layer or multiple layers of copper sheets in the carrier plate.

[0045] In the above embodiment, an example of arranging a group of photosensitive elements on the same detector is described. However, multiple groups of photosensitive elements can also be arranged on the same detector.

[0046] Figure 4It is a schematic diagram of the first example of the light-sensitive area distribution of the detector. The low-energy light-sensitive area is continuously distributed in an L shape to form the left end and the upper end of the low-energy plate. The high-energy light-sensitive area in the high-energy plate is correspondingly arranged with the low-energy light-sensitive area, and a filter is arranged on the carrier plate between the two. Thus, an end coincidence detection area in an L shape is formed by laminating the low-energy plate, the carrier plate, and the high-energy plate.

[0047] Figure 5 It is a schematic diagram of the second example of the light-sensitive area distribution of the detector. At the opposite left and right ends of the detector, end coincidence detection areas are respectively formed by laminating the low-energy plate, the carrier plate, and the high-energy plate, with the two ends completely coinciding.

[0048] Figure 6 It is a schematic diagram of the third example of the light-sensitive area distribution of the detector. A continuous detection area is formed at three ends of the detector, that is, an end coincidence detection area formed by laminating the low-energy plate, the carrier plate, and the high-energy plate, with the three ends completely coinciding and the upper part of the fourth end partially coinciding.

[0049] Figure 7 It is a schematic diagram of the fourth example of the light-sensitive area distribution of the detector. A continuous detection area is formed at four ends of the detector, that is, an end coincidence detection area formed by laminating the four ends of the low-energy plate, the carrier plate, and the high-energy plate completely coinciding.

[0050] Figure 8 It is a schematic diagram of the fifth example of the light-sensitive area distribution of the detector. A continuous detection area is formed at four ends of the detector, that is, an end coincidence detection area formed by the four ends completely coinciding and laminating. Compared with the fourth example, the difference lies in the different positions of the four connected detection areas in the detection plate.

[0051] Through the above, a detector with a light-sensitive area at the end is formed. Of course, the above Figures 4 to 8 The shown structure can also be applied to the case of only one layer of detection plate in the above embodiments, that is, the light-sensitive parts are respectively located at the ends of the circuit board. This light-sensitive detector can be well applied to a ray detection device with a detector and a ray source arranged on the same side.

[0052] Figure 9 It is a schematic diagram of an example of a circular detection optical path. The circular detection optical path includes a ray source 8 and a detector 9. The ray source 8 is arranged on the periphery of the loop formed by the detector 9.

[0053] Figure 10 It is a partial schematic diagram of the circular detection optical path. As Figure 10As shown, the photosensitive area of the detector is located on the left side of the detector to form an end overlapping detection area. The rays from the ray source on its own side can easily irradiate the photosensitive part of the detector on the opposite side at a position extremely close to the detector 10, that is, the rays emitted from its own side are emitted at a certain angle close to the edge of the adjacent detector on the same side and are received by the opposite detector. Thus, in the annular detection optical path, the detector will neither block the rays from the ray source on its own side nor receive the rays from the ray source on other sides.

[0054] In the previous detectors, the detection area was located at the central position of the detector. In order to avoid the carrier plate, it was necessary to increase the distance between the ray source and the detector, thereby increasing the inclination angle of the beam surface. After increasing the beam surface inclination angle, although it was also possible to cover the detector opposite the light source, due to reasons such as oblique incidence and increased cone angle, the data quality would significantly decrease. According to the structure of the detector in the above-mentioned embodiment of the present invention, the above problems existing in the previous detectors can be solved, the shielding of the carrier plate can be avoided, and the annular detection optical path can be realized with a smaller ray inclination angle.

[0055] Optionally, in the above embodiment, the annular detection optical path with a detection area at the end is taken as an example for illustration, but it is not limited thereto, and it can also be applied to left-right symmetry, up-down symmetry, non-integral ring optical paths, etc., that is, it can be applied to the configuration where the X-ray source and the detector are in a plane respectively and the two are not coplanar.

[0056] As above, although the embodiments and specific examples of the present invention have been described in conjunction with the drawings, those skilled in the art can make various modifications and deformations without departing from the spirit and scope of the present invention, and such modifications and deformations all fall within the scope defined by the claims.

Claims

1. A ray detection device, characterized in that, Comprising: A detector and a radiation source, The detector includes a first detection plate, the first detection plate includes a first circuit board and a first photosensitive area provided on the first circuit board and constituting at least one end of the first detection plate. The first photosensitive area has a plurality of first photosensitive elements for detecting a first ray. Three sides of the end of the first detection plate where the first photosensitive area is located coincide with three sides of at least one end of the first circuit board, forming an end-coincidence detection area. The detector further includes: A second detection plate, including a second circuit board and a second photosensitive area provided on the second circuit board and constituting at least one end of the second detection plate. The second photosensitive area has a plurality of second photosensitive elements for detecting a second ray; A carrier plate located between the first detection plate and the second detection plate; and A filter plate carried by the carrier plate and located on the path of the second ray transmitted through the first detection plate, The edge of the end of the first detection plate where the first photosensitive area is located and the edge of the end of the second detection plate where the second photosensitive area is located coincide with the edge of at least one end of the carrier plate, forming the end-coincidence detection area. The rays emitted by the radiation source are emitted at an angle near the edges of adjacent detectors on the same side and are received by the opposite detectors.

2. The ray detection device according to claim 1, wherein, The first detection plate, the carrier plate and the second detection plate are formed into a rectangle, At at least one end of the first detection plate, three edges of the first circuit board coincide with three edges of the first photosensitive area provided on the first circuit board, At at least one end of the second detection plate, three edges of the second circuit board coincide with three edges of the second photosensitive area provided on the second circuit board, Three edges of at least one end of the first detection plate and three edges of at least one end of the second detection plate coincide with three edges of at least one end of the carrier plate, forming the end-coincidence detection area.

3. The ray detection device according to claim 1, wherein, The first detection plate, the carrier plate and the second detection plate are stacked, and the end-coincidence detection area is formed at least at the opposite two ends of the stacked arrangement.

4. The ray detection device according to claim 1, wherein, The first detection plate, the carrier plate and the second detection plate are stacked, and the end-coincidence detection area is formed at all ends of the stacked arrangement.

5. The ray detection device according to claim 1, wherein, The filter plate is bonded above the carrier plate.

6. The ray detection device according to claim 5, wherein, The filter plate is a copper plate with a thickness of 0.5 mm or more.

7. The ray detection device according to claim 4, wherein, The filter plate has different thicknesses according to different detection areas.

8. The ray detection device according to claim 4, wherein, The filter plate is provided with multiple layers.

9. The ray detection device according to claim 1, wherein, The energy of the second ray is higher than the energy of the first ray.

10. The ray detection device according to any one of claims 1 to 9, wherein, the detector and the ray source are respectively formed in a ring shape.

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