Cabinet x-ray system displaying magnification and sample position on tray
By designing the system that automatically adjusts the magnification in the cabinet X -ray system, the problem of unstable imaging quality is solved during the tray position transformation, and higher imaging quality stability is achieved.
Patent Information
- Application Number
- CN202380033180.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-27
- Publication Date
- 2025-01-28
AI Technical Summary
When the existing cabinet X-ray system changes the position of the pallet, it is difficult to automatically adjust the magnification of the imaging subsystem, resulting in unstable imaging quality.
A system is designed, including the chamber, imaging subsystem, tray and controller. The tray can be moved in multiple positions in the cavity, and at least two patterns are in each position in the field of vision of the imaging subsystem. The controller determines the pattern distance by analyzing the image of the tray, and calculates the appropriate magnifying multiple based on this.
The automatic adjustment of the imaging subsystem is automatically adjusted when the tray is transformed, which improves the stability and consistency of the imaging quality.
Smart Images
Figure CN119384595A_ABST
Abstract
Description
Background Art
[0001] A cabinet X-ray system may include an X-ray source and an X-ray detector located within a shielded chamber. The chamber may be made of a material (usually lead) that blocks X-rays from leaving the chamber. The cabinet X-ray system may also include a tray located between the X-ray source and the X-ray detector for holding a sample to be imaged in the chamber. The X-ray detector may take an X-ray image of the sample based on the interaction between the sample and the X-rays from the X-ray source. Summary of the invention
[0002] A system is disclosed herein, comprising: a chamber; an imaging subsystem; a tray configured to support a sample in the chamber, and configured to be located at any position of M positions in the chamber (position (i), i=1, ..., M), M being an integer greater than 1; and a controller. For each value of i, when the tray is located at position (i), at least two pattern points Xi and Yi on the tray are within the field of view of the imaging subsystem. The controller is configured to, for each value of i, (A) respectively locate two images of Xi and Yi in an image (i) of the tray taken by the imaging subsystem when the tray is located at position (i), (B) determine the pattern distance (i) between the two images of Xi and Yi in the image (i) in units of pixels of the imaging subsystem, and (C) determine the magnification (i) based on the pattern distance (i).
[0003] In one aspect, the imaging subsystem includes a camera, and the system further includes: (A) an X-ray source configured to direct an X-ray beam into the chamber; and (B) an X-ray detector configured to capture an X-ray image of the sample on the tray based on an interaction between the sample and the X-ray beam.
[0004] In one aspect, the camera includes an image sensor and a lens system, and the image sensor is located outside the chamber.
[0005] In one aspect, the image sensor is not exposed to any X-rays from any X-ray source within the chamber.
[0006] In one aspect, the camera is a visible light camera.
[0007] In one aspect, when in the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.
[0008] In one aspect, for each value of i, when the tray is at position (i), any point on the tray that is within the field of view of the x-ray detector is within the field of view of the camera.
[0009] In one aspect, the tray includes a plurality of horizontal straight lines and a plurality of vertical straight lines, and each of the 2×M pattern points Xi and Yi is located on the plurality of horizontal straight lines and the plurality of vertical straight lines.
[0010] In one aspect, for each value of i, (A) the two images of Xi and Yi are located on the edge of the image (i) of the tray, and (B) Xi and Yi are located on two adjacent parallel lines among a plurality of horizontal lines and a plurality of vertical lines.
[0011] In one aspect, the plurality of horizontal straight lines and the plurality of vertical straight lines have equal line spacing.
[0012] In one aspect, the system further comprises a display configured to display (A) the magnification (i) and (B) an image (i) of the tray when the tray is in position (i).
[0013] In one aspect, the magnification factor (i) is equal to the pattern distance (i) multiplied by a constant factor.
[0014] In one aspect, the imaging subsystem includes: (A) an X-ray source configured to direct an X-ray beam into a chamber; and (B) an X-ray detector configured to capture an X-ray image of a sample on a tray based on an interaction between the sample and the X-ray beam.
[0015] In one aspect, when in the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.
[0016] The present invention also discloses a system, comprising: a chamber; an imaging subsystem; a tray configured to support a sample in the chamber and configured to be located at any position of M positions in the chamber (position (i), i=1, ..., M), M being an integer greater than 1; and a display configured to display, for each value of i, an image (i) of the tray captured by the imaging subsystem when the tray is located at position (i). The tray comprises (A) N magnification marks (magnification mark (j), j=1, ..., N) and (B) N magnification identifiers (magnification identifier (j), j=1, ..., N) corresponding one-to-one to the N magnification marks, respectively, N being a positive integer. For each value of j, when the tray is located at a marked position of the M positions and the marked position results in a magnification as indicated by the magnification identifier (j), an edge of the marked image of the tray captured by the imaging subsystem when the tray is located at the marked position intersects with an image of the magnification mark (j) in the marked image.
[0017] In one aspect, for each value of j, the magnification designation (j) comprises a number and is adjacent to the magnification label (j).
[0018] In one aspect, each of the N magnification markings has an L shape.
[0019] In one aspect, the imaging subsystem includes a camera, and the system further includes: (A) an X-ray source configured to direct an X-ray beam into the chamber; and (B) an X-ray detector configured to capture an X-ray image of the sample on the tray based on an interaction between the sample and the X-ray beam.
[0020] In one aspect, the camera includes an image sensor and a lens system, and the image sensor is located outside the chamber.
[0021] In one aspect, the camera is a visible light camera.
[0022] In one aspect, when in the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.
[0023] In one aspect, for each value of i, when the tray is at position (i), any point on the tray that is within the field of view of the x-ray detector is within the field of view of the camera.
[0024] In one aspect, the imaging subsystem includes: (A) an X-ray source configured to direct an X-ray beam into a chamber; and (B) an X-ray detector configured to capture an X-ray image of a sample on a tray based on an interaction between the sample and the X-ray beam.
[0025] In one aspect, when in the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A perspective view schematically illustrates a cabinet-type X-ray system including a tray according to an embodiment.
[0027] Figure 2 According to the embodiment Figure 1 Top view of the tray.
[0028] Figure 3 According to the embodiment Figure 2 Image of a pallet.
[0029] Figure 4 According to an alternative embodiment, Figure 1 Top view of the tray.
[0030] Figure 5-Figure 7 According to the embodiment Figure 4 Image of a pallet. DETAILED DESCRIPTION
[0031] Cabinet X-ray System
[0032] Figure 1 The cabinet X-ray system 100 according to an embodiment is schematically shown in a perspective view. In an embodiment, the cabinet X-ray system 100 may include a chamber 110, an X-ray source 120, an X-ray detector 130, a tray 140, a camera 150, a controller 160, and a display 170.
[0033] Chamber
[0034] In one embodiment, reference Figure 1 , the chamber 110 may prevent X-rays (eg, X-ray beam 122) from the X-ray source 120 from leaving the chamber 110. The chamber 110 may be made of a material (eg, lead) that blocks X-rays.
[0035] X-ray Source
[0036] In one embodiment, reference Figure 1 , the X-ray source 120 may send an X-ray beam (e.g., X-ray beam 122) into the chamber 110. In one embodiment, the X-ray source 120 may be stationary relative to the chamber 110. In one embodiment, the X-ray source 120 may be located in the chamber 110. In one embodiment, the X-ray source 120 may be a point source; and the X-ray beam 122 may be a divergent beam (e.g., a pyramidal beam or a cone beam).
[0037] tray
[0038] In one embodiment, reference Figure 1 , the tray 140 may support a sample 190, which is imaged by an X-ray imaging subsystem 120+130, which includes an X-ray source 120 and an X-ray detector 130. In an embodiment, the tray 140 may not be opaque to the X-rays (e.g., the X-ray beam 122) from the X-ray source 120.
[0039] In one embodiment, the tray 140 may be located at any one of a plurality of positions in the chamber 110. The number M of the plurality of positions of the tray 140 in the chamber 110 may be a finite number or an infinite number. In other words, M is an integer greater than 1.
[0040] In one embodiment, when in the plurality of positions, the tray 140 may remain perpendicular to the same straight line (not shown) intersecting both the X-ray source 120 and the X-ray detector 130. In one embodiment, when in the plurality of positions, the tray 140 may remain parallel to the same radiation receiving surface of the X-ray detector 130.
[0041] In one embodiment, reference Figure 1 and Figure 2, the tray 140 may include a plurality of horizontal straight lines H1-H7 and a plurality of vertical straight lines V1-V7 with equal line spacing. In other words, the distance between any two adjacent horizontal straight lines is the same as the distance between any two adjacent vertical straight lines. For example, the line spacing of H1-H7 and V1-V7 may be 5 cm, which means that d(H1,H2)=d(H2,H3)=d(H3,H4)=d(H4,H5)=d(H5,H6)=d(H6,H7)=d(V1,V2)=d(V2,V3)=d(V3,V4)=d(V4,V5)=d(V5,V6)=d(V6,V7)=5 cm. d(V1,V2) represents the distance between lines V1 and V2, and so on.
[0042] X-ray detectors
[0043] In one embodiment, reference Figure 1 , the X-ray detector 130 can capture an image of the sample 190 based on the interaction between the sample 190 and the X-rays (e.g., the X-ray beam 122) from the X-ray source 120.
[0044] The interaction between the X-ray beam 122 and the sample 190 may include scenarios such as the following: (A) some radiation particles of the X-ray beam 122 incident on the sample 190 are blocked by the sample 190, and (B) some radiation particles of the X-ray beam 122 incident on the sample 190 pass through the sample 190 without changing their direction.
[0045] In one embodiment, the X-ray detector 130 may be located in the chamber 110 .
[0046] Camera
[0047] In one embodiment, reference Figure 1 , the camera 150 may capture images of the tray 140 and the sample 190 on the tray 140. In one embodiment, the camera 150 may be positioned adjacent to the X-ray source 120 (as shown).
[0048] In one embodiment, the field of view of the camera 150 may encompass the field of view of the X-ray imaging subsystem 120+130 relative to the tray 140. In other words, when the tray 140 is located in any of the above-mentioned multiple positions, any point on the tray 140 and within the field of view of the X-ray imaging subsystem 120+130 is within the field of view of the camera 150.
[0049] In one embodiment, the camera 150 may be within the chamber 110. Alternatively, the camera 150 may include: (A) an image sensor (not shown) and (B) a lens system (not shown), and the image sensor of the camera 150 is located outside the chamber 110. In addition, in one embodiment, the image sensor of the camera 150 may not be exposed to any X-rays from any X-ray source (including the X-ray source 120) within the chamber 110.
[0050] In one embodiment, the camera 150 may be a visible light camera.
[0051] In one embodiment, the line spacings of the lines H1-H7 and V1-V7 of the tray 140 may be such that when the tray 140 is located at any of the plurality of positions, at least two parallel lines of the lines H1-H7 and V1-V7 are located in the image of the tray 140 captured by the camera 150 when the tray 140 is located at any of the plurality of positions. Figure 3 , two parallel lines H4 and H5 are located on the tray 140. Figure 1 The position shown is in the image 300 of the tray 140 captured by the camera 150.
[0052] Controller
[0053] In one embodiment, reference Figure 1 , the controller 160 may be configured to process data (eg, image data) from the camera 150 and the X-ray detector 130 .
[0054] monitor
[0055] In one embodiment, reference Figure 1 The display 170 may display on its screen (A) an image of the tray 140 and the sample 190 on the tray 140 captured by the camera 150 , and (B) a magnification of the X-ray imaging subsystem 120+130 determined by the controller 160 .
[0056] Cabinet X-ray System Operation - Overview
[0057] In one embodiment, reference Figure 1 and Figure 2 , the operation of the cabinet X-ray system 100 can be described as follows.
[0058] Assume that when the tray 140 is located at Figure 1 In the first position shown, the surface of the field of view of the camera 150 intersects the tray 140 along the enclosing line 142.1, which has a rectangular shape with four sides parallel to the lines H1-H7 and V1-V7 (as shown). The enclosing line 142.1 intersects two adjacent horizontal lines H4 and H5 at points X1 and Y1, respectively.
[0059] Figure 3 An image 300 of the tray 140 and the sample 190 captured by the camera 150 when the tray 140 is in the first position is shown. It should be noted that (A) the image of the horizontal line H3 in the image 300 is the line H3' (and so on), (B) the image of the enclosing line 142.1 in the image 300 is the edge 142.1' of the image 300, and (C) the images of the points X1 and Y1 in the image 300 are the points X1' and Y1', respectively.
[0060] In one embodiment, the line spacing of lines H1-H7 and V1-V7 can be such that when the tray 140 is located at any position among the plurality of positions, there are at least two points on the tray 140 such that (A) the two images of the two points are respectively on the edges of the image of the tray 140 captured by the camera 150 when the tray 140 is located at the any position, and (B) the two points are respectively on two adjacent parallel lines of lines H1-H7 and V1-V7. For example, referring to Figure 1-Figure 3 , when the tray 140 is in the first position (eg Figure 1 As shown), (A) the images X1′ and Y1′ of the two points X1 and Y1 are located on the edge 142.1′ of the image 300, and (B) the two points X1 and Y1 are respectively on two adjacent parallel lines H4 and H5.
[0061] In one embodiment, the reference line spacing of the lines H1-H7 and V1-V7 may be specified in units of pixels of the camera 150. For example, the reference line spacing of the lines H1-H7 and V1-V7 may be specified as 50 pixels in units of pixels of the camera 150. As a result, the reference distance between the two points X1 and Y1 in units of pixels of the camera 150 is specified as 50 pixels.
[0062] In one embodiment, the controller 160 may analyze the edge 142 . 1 ′ of the image 300 and locate the two points X1 ′ and Y1 ′.
[0063] Next, in one embodiment, the controller 160 may determine the distance between X1' and Y1' in units of pixels of the camera 150. Assume that the controller 160 determines that the distance between X1' and Y1' in units of pixels of the camera 150 is 100 pixels.
[0064] Next, in one embodiment, the controller 160 may determine the magnification of the X-ray imaging subsystem 120+130 when the tray 140 is located at the first position based on the distance between X1' and Y1' and the reference distance between X1 and Y1. For example, the controller 160 may determine that the magnification of the X-ray imaging subsystem 120+130 when the tray 140 is located at the first position is 100 / 50=2.
[0065] In other words, the magnification is equal to the distance between X1' and Y1' (referred to as the pattern distance) multiplied by a constant factor. The constant factor is equal to the inverse of the reference distance between X1 and Y1 (ie, 1 / 50).
[0066] Next, in one embodiment, the display 170 may display (A) the image 300 and (B) the phrase “Magnification=2” on its screen for viewing by the user of the cabinet X-ray system 100 .
[0067] Next, in one embodiment, if the user is satisfied with (A) the position of the sample 190 on the tray 140 and (B) the magnification of the X-ray imaging subsystem 120+130, the user can enable the X-ray imaging subsystem 120+130 to take an X-ray image of the sample 190.
[0068] Operation of a Cabinet X-ray System - Summary
[0069] In one embodiment, the operation of the cabinet X-ray system 100 can be summarized as follows. The user places the sample 190 on the tray 140 and then places the tray 140 in a first position in the chamber 110. Then, the camera 150 captures an image 300 ( Figure 3 ). The controller 160 then searches for 2 points on two adjacent parallel lines in the lines H1-H7 and V1-V7 in the edge 142.1' of the image 300, and thereby finds and locates the two points X1' and Y1' on the edge 142.1'. Next, the controller 160 determines that the distance between X1' and Y1' is 100 pixels in units of pixels of the camera 150. The controller 160 then determines that the magnification of the camera 150 is 100 / 50=2, which is used to estimate the magnification of the X-ray imaging subsystem 120+130 (because the camera 150 and the X-ray source 120 are adjacent to each other). Next, the display 170 displays (A) the image 300 and (B) the phrase "Magnification = 2" on its screen for the user to view.
[0070] If the user is satisfied with (A) the position of the sample 190 on the tray 140 and (B) the 2x magnification of the X-ray imaging subsystem 120+130, the user can enable the X-ray imaging subsystem 120+130 to take an X-ray image of the sample 190 (not shown).
[0071] If the user is not satisfied with the position of the sample 190 on the tray 140 (e.g., part of the sample 190 is not displayed in the image 300), the user may move the sample 190 on the tray 140 while viewing the image of the tray 140 on the screen of the display 170 until the sample 190 is located at the desired position on the tray 140. The user may then cause the X-ray imaging subsystem 120+130 to take an X-ray image of the sample 190 (assuming that the user is satisfied with the 2x magnification of the X-ray imaging subsystem 120+130).
[0072] If the user is not satisfied with the 2x magnification of the X-ray imaging subsystem 120+130 and wants to adjust the magnification, the user can move the tray 140 up or down to the second position, and then perform the above-mentioned whole process, and the display 170 again displays the image of the tray 140 and the new magnification of the X-ray imaging subsystem 120+130 corresponding to the tray 140 located in the second position.
[0073] For example, when the tray 140 is located at the second position, it is assumed that the distance between X1' and Y1' in units of pixels of the camera 150 is 200 pixels. Therefore, the magnification of the X-ray imaging subsystem 120+130 can be determined to be 200 / 50=4.
[0074] If the user is satisfied with the position of the sample 190 on the tray 140 and the new 4x magnification of the X-ray imaging subsystem 120 + 130 , the user may cause the X-ray imaging subsystem 120 + 130 to take an X-ray image of the sample 190 on the tray 140 .
[0075] Alternative Embodiments
[0076] X-ray imaging subsystem acts as a camera
[0077] In the embodiments described above, reference is made to Figure 1-Figure 3 , camera 150 is used to help estimate the magnification of the X-ray imaging subsystem 120+130. In an alternative embodiment, camera 150 may be omitted, and the X-ray imaging subsystem 120+130 may be used to help estimate its own magnification. In other words, the X-ray imaging subsystem 120+130 plays the role of camera 150 in determining the magnification of the X-ray imaging subsystem 120+130.
[0078] Specifically, the operation of the cabinet X-ray system 100 in this alternative embodiment can be described as follows. The user places the sample 190 on the tray 140, and then places the tray 140 in the first position in the chamber 110. Next, the X-ray imaging subsystem 120+130 takes an X-ray image of the tray 140. Then, the controller 160 searches the X-ray image and locates points X1' and Y1' on the edge. Next, the controller 160 determines the distance between X1' and Y1' (for example, 100 pixels) in units of pixels of the X-ray detector 130. Then, assuming that the reference distance between X1 and Y1 is specified as 50 pixels in units of pixels of the X-ray detector 130, the controller 160 determines the magnification of the X-ray imaging subsystem 120+130 to be 100 / 50=2, and causes the display 170 to display (A) the X-ray image and (B) a magnification of 2 times on the screen of the display for the user to view.
[0079] Image of the tray indicates magnification and does not require controller determination
[0080] In the embodiments described above, reference is made to Figure 1-Figure 3 , an image of the tray 140 captured by the camera 150 (e.g., Figure 3 The image 300 of the tray 140 does not indicate the magnification of the X-ray imaging subsystem 120+130. The magnification of the X-ray imaging subsystem 120+130 is determined by the controller 160. In an alternative embodiment, the image of the tray 140 taken by the camera 150 indicates the magnification of the X-ray imaging subsystem 120+130 and does not need to be determined by the controller 160.
[0081] Specifically, in one embodiment, reference Figure 4 Instead of including grid lines H1-H7 and V1-V7 ( Figure 1-Figure 2 ). For simplicity, Figure 4 In the following figures, sample 190 is omitted.
[0082] In one embodiment, each of the four magnification marks 410a, 415a, 420a, and 425a may have an L shape.
[0083] In one embodiment, for confirmation (which will be self-explanatory later), the tray 140 may include three additional sets of similar magnification markings and magnification indicators (e.g., Figure 4 shown).
[0084] In one embodiment, reference Figure 4 When the tray 140 is located at the first marked position in the chamber 110, and the first marked position causes the magnification of the X-ray imaging subsystem 120+130 to be 2.5 as indicated by the magnification mark 425b, the surface of the field of view of the camera 150 may intersect the tray 140 along the enclosing line 442.25 that intersects with the corresponding magnification mark 425a.
[0085] Figure 5 An image 500 of the tray 140 captured by the camera 150 when the tray 140 is in the first marked position is shown. It should be noted that the edge 442.25' of the image 500 intersects the image 425a' of the magnification mark 425a. As a result, the image 500 of the tray 140 indicates that the magnification of the X-ray imaging subsystem 120+130 is 2.5.
[0086] Similarly, in one embodiment, reference Figure 4 When the tray 140 is located at the second marked position in the chamber 110, and the second marked position causes the magnification of the X-ray imaging subsystem 120+130 to be 2.0 as indicated by the magnification mark 420b, the surface of the field of view of the camera 150 may intersect the tray 140 along the enclosing line 442.20 that intersects with the corresponding magnification mark 420a.
[0087] Figure 6 An image 600 of the tray 140 captured by the camera 150 when the tray 140 is in the second marked position is shown. It should be noted that the edge 442.20' of the image 600 intersects the image 420a' of the magnification mark 420a. As a result, the image 600 of the tray 140 indicates that the magnification of the X-ray imaging subsystem 120+130 is 2.0.
[0088] Figure 7 An image 700 of the tray 140 captured by the camera 150 is shown when the tray 140 is located in a position in the chamber 110. It should be noted that the edge 442.X of the image 700 exceeds the image 420a' of the magnification mark 420a. As a result, the image 700 of the tray 140 as displayed on the screen of the display 170 indicates to the user that the magnification of the X-ray imaging subsystem 120+130 is between 1.5 and 2.0.
[0089] The X-ray imaging subsystem acts as a camera in estimating magnification without requiring the controller to determine
[0090] In the alternative embodiment described above, the image of the tray 140 taken by the camera 150 indicates the magnification of the X-ray imaging subsystem 120 + 130. Alternatively, the camera 150 may be omitted; and the X-ray image of the tray 140 taken by the X-ray imaging subsystem 120 + 130 indicates the magnification of the X-ray imaging subsystem 120 + 130.
[0091] Specifically, the operation of the cabinet X-ray system 100 in this alternative embodiment can be described as follows. The user places the sample 190 on the tray 140 ( Figure 4 ), and then the tray 140 is placed in the chamber 110. Next, the X-ray imaging subsystem 120+130 captures an X-ray image of the tray 140, which is then displayed on the screen of the display 170. The edge of the X-ray image of the tray 140 displayed on the screen indicates to the user the magnification of the X-ray imaging subsystem 120+130. For example, assuming that the X-ray image is as shown in FIG. Figure 7 Thus, edge source 442.X of image 700 indicates to the user that the magnification of the X-ray imaging subsystem 120+130 is in the range of 1.5 to 2.0.
[0092] Although various aspects and embodiments are disclosed herein, other aspects and embodiments will be apparent to those skilled in the art. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the appended claims.
Claims
1. A system comprising: Chamber; Imaging subsystem; a tray configured to support the sample in the chamber and configured to be located at any one of M positions in the chamber (position (i), i=1, ..., M), wherein M is an integer greater than 1; and Controller, wherein, for each value of i, when the tray is at the position (i), at least two pattern points Xi and Yi on the tray are within the field of view of the imaging subsystem, and Wherein, the controller is configured to, for each value of i, (A) respectively locate the two images Xi and Yi in the image (i) of the tray taken by the imaging subsystem when the tray is at the position (i), (B) determine the pattern distance (i) between the two images Xi and Yi in the image (i) in units of pixels of the imaging subsystem, and (C) determine the magnification (i) based on the pattern distance (i).
2. The system according to claim 1, in, The imaging subsystem includes a camera, and Wherein, the system further comprises: (A) an X-ray source configured to direct an X-ray beam into the chamber; and (B) An X-ray detector configured to capture an X-ray image of the sample on the tray based on an interaction between the sample and the X-ray beam.
3. The system according to claim 2, in, The camera includes an image sensor and a lens system, and Wherein, the image sensor is located outside the chamber.
4. The system of claim 3, wherein: The image sensor is not exposed to any X-rays from any X-ray source within the chamber.
5. The system of claim 2, wherein: The camera is a visible light camera.
6. The system of claim 2, wherein: When located at the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.
7. The system of claim 2, wherein: For each value of i, when the tray is at position (i), any point on the tray that is within the field of view of the X-ray detector is within the field of view of the camera.
8. The system of claim 1, in, The tray includes a plurality of horizontal straight lines and a plurality of vertical straight lines, and Wherein, each point in the 2×M pattern points Xi and Yi is located on the multiple horizontal straight lines and the multiple vertical straight lines.
9. The system of claim 8, wherein: For each value of i, (A) the two images of Xi and Yi are located on the edge of the image (i) of the tray, and (B) Xi and Yi are located on two adjacent parallel lines among the plurality of horizontal straight lines and the plurality of vertical straight lines.
10. The system of claim 8, wherein: The plurality of horizontal straight lines and the plurality of vertical straight lines have equal line intervals.
11. The system of claim 1, further comprising a display configured to display (A) a magnification (i) and (B) the image (i) of the tray when the tray is in the position (i).
12. The system of claim 1, wherein: The magnification factor (i) is equal to the pattern distance (i) multiplied by a constant factor.
13. The system of claim 1, wherein: The imaging subsystem comprises: (A) an X-ray source configured to direct an X-ray beam into the chamber; and (B) An X-ray detector configured to capture an X-ray image of the sample on the tray based on an interaction between the sample and the X-ray beam.
14. The system of claim 13, wherein: When located at the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.
15. A system comprising: Chamber; Imaging subsystem; a tray configured to support the sample in the chamber and configured to be located at any one of M positions in the chamber (position (i), i=1, ..., M), wherein M is an integer greater than 1; and a display configured to display, for each value of i, an image (i) of the tray captured by the imaging subsystem when the tray is located at the position (i); The tray includes (A) N magnification marks (magnification mark (j), j=1, ..., N) and (B) N magnification marks corresponding to the N magnification marks one by one (magnification mark (j), j=1, ..., N), wherein N is a positive integer, and Wherein, for each value of j, when the pallet is at a marked position among the M positions, and the marked position results in a magnification as indicated by the magnification marker (j), an edge of the marked image of the pallet captured by the imaging subsystem when the pallet is at the marked position intersects with an image of the magnification marker (j) in the marked image.
16. The system of claim 15, wherein: For each value of j, the magnification factor identifier (j) comprises a number and is adjacent to the magnification factor label (j).
17. The system of claim 15, wherein: Each of the N magnification marks has an L shape.
18. The system of claim 15, in, The imaging subsystem includes a camera, and Wherein, the system further comprises: (A) an X-ray source configured to direct an X-ray beam into the chamber; and (B) An X-ray detector configured to capture an X-ray image of the sample on the tray based on an interaction between the sample and the X-ray beam.
19. The system of claim 18, in, The camera includes an image sensor and a lens system, and Wherein, the image sensor is located outside the chamber.
20. The system of claim 18, wherein: The camera is a visible light camera.
21. The system of claim 18, wherein: When located at the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.
22. The system of claim 18, wherein: For each value of i, when the tray is at position (i), any point on the tray that is within the field of view of the X-ray detector is within the field of view of the camera.
23. The system of claim 15, wherein: The imaging subsystem comprises: (A) an X-ray source configured to direct an X-ray beam into the chamber; and (B) An X-ray detector configured to capture an X-ray image of the sample on the tray based on an interaction between the sample and the X-ray beam.
24. The system of claim 23, wherein: When located at the M positions, the tray remains perpendicular to the same straight line that intersects both the X-ray source and the X-ray detector.