Detection system and detection method for optical crosstalk of scintillation crystal array

Abstract

The invention specifically discloses a detection system and a detection method for optical crosstalk of a scintillation crystal array. The detection system comprises a shielding box body, a three-dimensional moving module, an objective table, a photosensitive device, a radiation source, a signal processing module and a computer, the three-dimensional moving module, the objective table, the photosensitive device, the radiation source and the signal processing module are arranged in the shielding box body; the three-dimensional moving module is arranged at the bottom of the shielding box body, the objective table is horizontally placed on the three-dimensional moving module, the photosensitive device is placed on the objective table and used for being coupled with a scintillation crystal array to be detected, and the three-dimensional moving module can move in the horizontal direction and the vertical direction; the radiation source is arranged at the top of the shielding box body, and the collimator is arranged below the radiation source; the signal processing module is connected with the photosensitive device, used for processing the electric signals and connected with the computer. The device can be used for automatically detecting the optical crosstalk of scintillation crystal arrays of various specifications, is high in detection efficiency, can effectively protect workers, and improves the safety.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear radiation detection, and in particular relates to a detection system and a detection method for optical crosstalk of a scintillation crystal array. Background Art

[0002] Scintillator crystal array is a key device used for nuclear radiation imaging and particle detection, as shown in the schematic diagram Figure 1 As shown, the scintillation crystal array consists of several crystal units 01, all of which are arranged in an array, and a reflective layer 02 is provided between two adjacent crystal units 01. It uses special scintillation crystal materials to convert gamma rays or positrons released from radioactive isotopes into light signals. In positron emission tomography (PET) and single photon emission computed tomography (SPECT), the position and energy of the rays can be accurately measured, thereby generating high-resolution three-dimensional images. In high-energy physics experiments, scintillation crystal arrays can be used to measure and identify the properties and trajectories of high-energy particles.

[0003] In the process of developing and producing scintillation crystal arrays, due to the light leakage of the reflective layer between the crystal units of the scintillation crystal array, the scintillation light generated by the measured crystal unit is transmitted to the adjacent crystal unit, which will cause undesirable optical output signal crosstalk, such as Figure 2 shown.

[0004] The optical crosstalk judgment and optical crosstalk rate calculation are shown in the following formula:

[0005]

[0006] Where: LC i --Optical crosstalk, the maximum value of the ratio of the ray response value of the crystal unit adjacent to the i-th crystal unit in the scintillation crystal array to the ray response value of the i-th crystal unit. i When ≥20%, the crystal unit is judged to have crosstalk;

[0007] V j —The ray response value of the jth crystal unit adjacent to the i-th crystal unit in the scintillation crystal array;

[0008] V i —The ray response value of the i-th crystal unit in the scintillation crystal array;

[0009] R C - Scintillator crystal array crosstalk rate;

[0010] N C —The number of crystal units in the scintillator array, i.e., LC i ≥20% of the crystal units, number;

[0011] N s—Number of crystal units tested in the scintillation crystal array, pieces.

[0012] This optical crosstalk will seriously damage the performance of the scintillation crystal array, such as reducing the energy resolution, time resolution, sensitivity, affecting the spatial resolution, etc. At present, the optical crosstalk between the crystal units of the scintillation crystal array is usually reduced by changing the reflective layer material, increasing the thickness of the reflective layer or improving the scintillation crystal array manufacturing process. However, the current equipment for detecting the optical crosstalk of the scintillation crystal array can only detect scintillation crystal arrays of the same specification, and can only detect one detection point at a time, the retrieval efficiency is low, and there are also radiation safety risks for workers. However, there are many types of scintillation crystal arrays, and the number and size of pixels vary due to specifications, which makes it difficult to detect the crosstalk rate. In addition, due to the different types and thicknesses of the reflective layers of the scintillation crystal arrays, as well as the different energies of the detection rays, the scattered ray components scattered to adjacent scintillation crystal units will be different (such as Figure 3 As shown), this affects the judgment of optical crosstalk. Summary of the invention

[0013] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a detection system and method for optical crosstalk of scintillation crystal arrays. The present invention can be used for automatic detection of optical crosstalk of scintillation crystal arrays of various specifications, has high detection efficiency, and can effectively protect workers and improve safety.

[0014] The technical solution of the present invention is achieved in this way:

[0015] The first scintillation crystal array optical crosstalk detection system includes a shielding box, a three-dimensional moving module, a stage, a photosensitive device, a radiation source, a signal processing module and a computer; the three-dimensional moving module, the stage, the photosensitive device, the radiation source and the signal processing module are arranged in the shielding box.

[0016] The three-dimensional mobile module is arranged at the bottom of the shielding box, the stage is horizontally placed on the three-dimensional mobile module, the photosensitive device is placed on the stage for coupling with the scintillation crystal array to be detected, and the three-dimensional mobile module can move in the horizontal direction and the vertical direction, thereby driving the scintillation crystal array to be detected to move.

[0017] The ray source is arranged on the top of the shielding box, and a collimator is arranged below the ray source, so that the rays generated by the ray source are collimated from the collimator to the scintillation crystal array to be detected.

[0018] The signal processing module is connected to the photosensitive device and the computer to receive the electrical signal of the photosensitive device and convert the electrical signal into a digital signal for transmission to the computer for processing to obtain detection data.

[0019] Furthermore, the radiation source and the collimator are arranged on the top of the shielding box through a horizontally arranged support plate, the radiation source is arranged above the support plate, and a mounting seat for mounting the collimator is provided below the support plate. At the same time, through holes for radiation to pass through are provided on the support plate and the mounting seat, so that the radiation generated by the radiation source can enter the collimator through the through holes.

[0020] Furthermore, the photosensitive device is a CMOS camera, a CCD camera, a position-sensitive photomultiplier tube or a silicon photomultiplier tube array.

[0021] Furthermore, the ray source is an X-ray machine or a gamma ray source.

[0022] The second scintillation crystal array optical crosstalk detection system comprises a shielding box, a stage, a supercontinuum spectrum, an optical fiber array module, a spectrometer and a computer; the stage, the supercontinuum spectrum, the optical fiber array module and the spectrometer are arranged in the shielding box.

[0023] The loading platform is arranged at the bottom of the shielding box and is used for placing the scintillation crystal array to be detected.

[0024] The optical fiber array module is arranged on the top of the shielding box, and is used for coupling with each pixel of the scintillation crystal array to be detected one by one. The optical fiber array module has a plurality of optical fibers, one of which is connected to the supercontinuum spectrum to receive the light source, and the remaining optical fibers are connected to the spectrometer to transmit the optical signal to the spectrometer and convert it into a digital signal. At the same time, the spectrometer is connected to a computer to transmit the digital signal to the computer for processing to obtain detection data.

[0025] Furthermore, the optical fiber array module is arranged on the top of the shielding box through a support frame, and the support frame includes a horizontally arranged support plate and a mounting seat arranged below the support plate for mounting the optical fiber array module.

[0026] A method for detecting optical crosstalk of a scintillation crystal array is provided, which uses the above-mentioned first optical crosstalk detection system of a scintillation crystal array to perform detection, and specifically comprises the following steps:

[0027] (1) Wipe the light-emitting surface of the scintillation crystal array to be detected clean and leave it in a dark place for at least 12 hours. Then, couple the light-emitting surface of the crystal array to be detected with the photosensitive surface of the photosensitive device using optical glue and place them on the stage, so that the scintillation crystal array to be detected is located above the photosensitive device.

[0028] (2) determining a number of crystal units as detection points according to the number of crystal units in the scintillation crystal array to be detected; aligning the collimation hole of the collimator with the center of the crystal unit corresponding to one of the detection points in the scintillation crystal array to be detected, activating the radiation source, closing the shielding box, and measuring the radiation response value of the crystal unit and its adjacent crystal units;

[0029] (3) After the measurement of the detection point is completed, the three-dimensional moving module drives the scintillation crystal array to be detected to move so that the collimation hole of the collimator is aligned with the center of the crystal unit corresponding to the next detection point, and the ray response value of the crystal unit and its adjacent crystal units is measured;

[0030] (4) Repeat step (3) to complete the measurement of all detection points, turn off the ray source, and then perform optical crosstalk judgment and crosstalk ratio calculation.

[0031] Furthermore, when determining the detection points in step (2), if the number of crystal units in the scintillation crystal array to be detected is ≤500, a detection point is set for every other crystal unit; if the number of crystal units in the scintillation crystal array to be detected is >500, the scintillation crystal array to be detected is first divided into a number of detection areas, and then a crystal unit is randomly selected in each detection area as a detection point.

[0032] A method for detecting optical crosstalk of a scintillation crystal array is provided, which adopts the second optical crosstalk detection system of the scintillation crystal array described above for detection, and specifically comprises the following steps:

[0033] (1) Wipe the light-emitting surface of the scintillation crystal array to be detected clean and leave it in a dark place for 12 hours. Then, couple the light-emitting surface of the crystal array to be detected with the optical fiber array module using optical glue. The crystal units of the crystal array to be detected correspond to the optical fiber array module one by one. Then, place them on the stage, and make sure that the scintillation crystal array to be detected is located below the optical fiber array module.

[0034] (2) Enable supercontinuum spectroscopy, use a preset wavelength band light source, and then use one of the optical fibers in the fiber array module to connect to the light source, and use the other optical fibers for measurement. Use this method to complete the measurement of all crystal units in the scintillation crystal array.

[0035] Furthermore, when wiping, use absorbent cotton or dust-free paper dipped in 120# solvent gasoline or alcohol to wipe the light-emitting surface of the scintillation crystal array to be tested.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The three-dimensional mobile module of the present invention can drive the scintillation crystal array to be detected to move, so that scintillation crystal arrays of different specifications can be detected. At the same time, the three-dimensional mobile module can complete the detection of all detection points of the scintillation crystal array at one time, thereby improving the detection efficiency. In addition, the staff does not need to open the shielding box to move the scintillation crystal array to be detected, thereby effectively protecting the staff and improving safety.

[0038] 2. The present invention adopts a supercontinuum spectrum light source instead of the scintillation light excited by radiation, which can effectively avoid the influence of scattered radiation on optical crosstalk, improve the accuracy of optical crosstalk, and at the same time avoid radiation radiation causing harm to workers, thereby improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 -Schematic diagram of the structure of the scintillation crystal array.

[0040] Figure 2 - Schematic diagram of optical crosstalk between crystal units in a scintillation crystal array.

[0041] Figure 3 -Schematic diagram of the effect of scattered rays on optical crosstalk of crystal units in a scintillation crystal array.

[0042] Figure 4 -The first detection system of optical crosstalk of scintillation crystal array of the present invention.

[0043] Figure 5 -Schematic diagram of detection point distribution when the number of crystal units in the scintillation crystal array is ≤500.

[0044] Figure 6 - Schematic diagram of detection point distribution when the number of crystal units in the scintillation crystal array is greater than 500.

[0045] Figure 7 -The second detection system of the optical crosstalk of the scintillation crystal array of the present invention.

[0046] Among them: 01-crystal unit; 02-reflection layer; 03-detection point; 04-detection area; 1-shielding box; 2-mounting seat; 3-scintillation crystal array to be detected; 4-photosensitive device; 5-supercontinuum spectrum; 6-spectrometer; 7-signal processing module; 8-computer; 9-collimator; 10-fiber array module; 11-support frame; 12-three-dimensional moving module; 13-stage; 14-ray source. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] See also Figure 4 The first detection system of scintillation crystal array optical crosstalk includes a shielding box 1, a three-dimensional moving module 12, a stage 13, a photosensitive device 4, a radiation source 14 (X-ray machine or gamma-ray source), a signal processing module 7 and a computer 8; the three-dimensional moving module 12, the stage 13, the photosensitive device 4, the radiation source 14 and the signal processing module 7 are arranged in the shielding box 1.

[0049] The three-dimensional moving module 12 is arranged at the bottom of the shielding box 1, the stage 13 is horizontally placed on the three-dimensional moving module 13, and the photosensitive device 4 is placed on the stage 4 for coupling with the scintillation crystal array 3 to be detected. The three-dimensional moving module 12 can move in the horizontal direction and the vertical direction, thereby driving the scintillation crystal array 3 to be detected to move.

[0050] The ray source 14 is arranged on the top of the shielding box 1 , and a collimator 9 is arranged below the ray source 14 , so that the rays generated by the ray source 14 can be collimated by the collimator 9 and directed toward the scintillation crystal array 3 to be detected.

[0051] The signal processing module 7 is connected to the photosensitive device 4 and the computer 8 to receive the electrical signal of the photosensitive device 4 and convert the electrical signal into a digital signal for transmission to the computer 8 for processing to obtain detection data.

[0052] The shielding box here is mainly made of lead and high-density steel, which is used to prevent radiation leakage and shield external light sources. In this way, when performing optical crosstalk detection of scintillation crystal arrays, the three-dimensional mobile module can drive the scintillation crystal array to be detected to move, so that scintillation crystal arrays of different specifications can be detected. At the same time, the three-dimensional mobile module can also complete the detection of all detection points of the scintillation crystal array at one time, improving the detection efficiency, and the staff does not need to open the shielding box to move the scintillation crystal array to be detected, thereby effectively protecting the staff and improving safety.

[0053] The three-dimensional moving module is composed of a ball screw, a guide rail and a motor, etc., which can provide horizontal and vertical movement forces, thereby driving the scintillation crystal array to be detected to move in the horizontal and vertical directions.

[0054] Here, the rays generated by the ray source are collimated by a collimator and directed onto the scintillation crystal array to be detected, generating a light signal. The photosensitive device converts the light signal into an electrical signal. The signal processing module converts the original pulse signal generated by the photosensitive device into a processable digital signal through filtering, amplification, shaping, analog-to-digital conversion and other processes, and then connects to the computer host for processing to obtain detection data.

[0055] In a specific implementation, the radiation source 14 and the collimator 9 are arranged on the top of the shielding box 1 through a horizontally arranged support plate 11, the radiation source 14 is arranged above the support plate 11, and a mounting seat 2 for mounting the collimator 9 is provided below the support plate 11. At the same time, through holes for radiation to pass through are provided on the support plate 11 and the mounting seat 2, so that the radiation generated by the radiation source 14 can enter the collimator 9 through the through holes.

[0056] In a specific implementation, the photosensitive device is a CMOS camera, a CCD camera, a position-sensitive photomultiplier tube or a silicon photomultiplier tube array.

[0057] The photosensitive device is coupled with the scintillation crystal array to generate electrical signals, which are divided into integral type and counting type. When a scintillation crystal array has small and numerous crystal units, an integral type photosensitive device such as a CMOS camera, a CCD camera, etc. can be used, and X-ray excitation is suitable at this time. When the scintillation crystal array is a conventional model and is in mass production, a counting type photosensitive device such as a position-sensitive photomultiplier tube and a silicon photomultiplier tube array can be used, and a γ reflection source is suitable for excitation at this time.

[0058] The first detection system is used to detect the optical crosstalk of the scintillation crystal array, which specifically includes the following steps:

[0059] (1) Use absorbent cotton or dust-free paper dipped in 120# solvent gasoline or alcohol to wipe the light-emitting surface of the scintillation crystal array to be tested clean, then shield it from light and let it stand for at least 12 hours. Then use optical glue to couple the light-emitting surface of the crystal array to be tested with the photosensitive surface of the photosensitive device, and place them on the stage, so that the scintillation crystal array to be tested is located above the photosensitive device;

[0060] (2) determining a number of crystal units as detection points according to the number of crystal units in the scintillation crystal array to be detected; aligning the collimation hole of the collimator with the center of the crystal unit corresponding to one of the detection points in the scintillation crystal array to be detected, activating the radiation source, closing the shielding box, and measuring the radiation response value of the crystal unit and its adjacent crystal units;

[0061] (3) After the measurement of the detection point is completed, the three-dimensional moving module is controlled by a computer to move, and the three-dimensional moving module drives the scintillation crystal array to be detected to move, so that the collimation hole of the collimator is aligned with the center of the crystal unit corresponding to the next detection point, and the radiation response value of the crystal unit and its adjacent crystal units is measured;

[0062] (4) Repeat step (3) to complete the measurement of all detection points, turn off the ray source, and then perform optical crosstalk judgment and crosstalk ratio calculation.

[0063] In specific implementation, when determining the detection point 03 in step (2), if the number of crystal units 01 in the scintillation crystal array to be detected is ≤500, a detection point 03 is set for every other crystal unit (e.g. Figure 5 If the number of crystal units in the scintillation crystal array to be detected is greater than 500, the scintillation crystal array to be detected is first divided into a number of detection areas 04, and then a crystal unit 01 is randomly selected in each detection area 04 as a detection point 03 (such as Figure 6 shown).

[0064] For the number of detection points, please see the following table:

[0065]

[0066] See also Figure 7 A second detection system for optical crosstalk of a scintillation crystal array includes a shielding box 1, a stage 13, a supercontinuum spectrum 5, an optical fiber array module 10, a spectrometer 6 and a computer 8; the stage 13, the supercontinuum spectrum 5, the optical fiber array module 10 and the spectrometer 6 are arranged in the shielding box 1.

[0067] The stage 13 is disposed at the bottom of the shielding box 1 and is used to place the scintillation crystal array 3 to be detected.

[0068] The optical fiber array module 10 is arranged on the top of the shielding box 1, and is used for coupling with each pixel of the scintillation crystal array 3 to be detected one by one. The optical fiber array module has a plurality of optical fibers, one of which is connected to the supercontinuum spectrum to receive the light source, and the remaining optical fibers are connected to the spectrometer to transmit the optical signal to the spectrometer and convert it into a digital signal. At the same time, the spectrometer is connected to a computer to transmit the digital signal to the computer for processing to obtain detection data.

[0069] The shielding box here is mainly made of lead and high-density steel, which is used to shield external light sources. The supercontinuum spectrum light source is used here instead of the scintillation light excited by the rays, which can effectively avoid the influence of scattered rays on light crosstalk, and at the same time avoid the harm of radiation to the staff, thus improving safety. The fiber array module here is composed of multiple optical fibers. When in use, the diameter of the optical fiber is smaller than the diagonal length of the array crystal unit, and it can be coupled with each pixel of the scintillation crystal array one by one.

[0070] In a specific implementation, the optical fiber array module 10 is arranged on the top of the shielding box 1 through a support frame, and the support frame includes a horizontally arranged support plate 11 and a mounting seat 2 arranged under the support plate 11 for mounting the optical fiber array module 10 .

[0071] The detection is performed using the second detection system described above, which specifically includes the following steps:

[0072] (1) Use absorbent cotton or dust-free paper dipped in 120# solvent gasoline or alcohol to wipe the light-emitting surface of the scintillation crystal array to be tested clean, then shield it from light and let it stand for at least 12 hours, then use optical glue to couple the light-emitting surface of the crystal array to be tested with the optical fiber array module, so that the crystal units of the crystal array to be tested correspond to the optical fiber array module one by one, and then place them on the stage, and at the same time make the scintillation crystal array to be tested be located below the optical fiber array module;

[0073] (2) Enable the supercontinuum spectrum, use a preset wavelength band light source, and then use the fiber array module to connect one of the optical fibers to the supercontinuum spectrum to access the light source, and connect the other optical fibers to the spectrometer for measurement. Use this method to complete the measurement of all scintillation crystal array crystal units.

[0074] Since different scintillation crystal arrays generate different fluorescence bands, it is necessary to select light sources with different bands according to different scintillation crystals to be detected during detection.

[0075] Finally, it should be noted that the above embodiments of the present invention are only examples for illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes and modifications can be made based on the above description. It is impossible to list all implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A scintillation crystal array optical crosstalk detection system, characterized in that: It includes a shielding box, a three-dimensional moving module, a stage, a photosensitive device, a ray source, a signal processing module and a computer; the three-dimensional moving module, the stage, the photosensitive device, the ray source and the signal processing module are arranged in the shielding box; The three-dimensional moving module is arranged at the bottom of the shielding box, the stage is horizontally placed on the three-dimensional moving module, the photosensitive device is placed on the stage for coupling with the scintillation crystal array to be detected, and the three-dimensional moving module can move in the horizontal direction and the vertical direction, thereby driving the scintillation crystal array to be detected to move; The ray source is arranged on the top of the shielding box, and a collimator is arranged below the ray source, so that the rays generated by the ray source are collimated from the collimator to the scintillation crystal array to be detected; The signal processing module is connected to the photosensitive device and the computer to receive the electrical signal of the photosensitive device and convert the electrical signal into a digital signal for transmission to the computer for processing to obtain detection data.

2. A scintillation crystal array optical crosstalk detection system according to claim 1, characterized in that: The radiation source and the collimator are arranged on the top of the shielding box through a horizontally arranged support plate, the radiation source is arranged above the support plate, and a mounting seat for mounting the collimator is arranged below the support plate. At the same time, through holes for radiation to pass through are arranged on the support plate and the mounting seat, so that the radiation generated by the radiation source can enter the collimator through the through holes.

3. A scintillation crystal array optical crosstalk detection system according to claim 1, characterized in that: The photosensitive device is a CMOS camera, a CCD camera, a position-sensitive photomultiplier tube or a silicon photomultiplier tube array.

4. The scintillation crystal array optical crosstalk detection system according to claim 1, characterized in that: The ray source is an X-ray machine or a gamma ray source.

5. A scintillator crystal array optical crosstalk detection system, characterized in that: It includes a shielding box, a stage, a supercontinuum spectrum, an optical fiber array module, a spectrometer and a computer; the stage, the supercontinuum spectrum, the optical fiber array module and the spectrometer are arranged in the shielding box; The stage is arranged at the bottom of the shielding box and is used to place the scintillation crystal array to be detected; The optical fiber array module is arranged on the top of the shielding box, and is used for coupling with each pixel of the scintillation crystal array to be detected one by one. The optical fiber array module has a plurality of optical fibers, one of which is connected to the supercontinuum spectrum to receive the light source, and the remaining optical fibers are connected to the spectrometer to transmit the optical signal to the spectrometer and convert it into a digital signal. At the same time, the spectrometer is connected to a computer to transmit the digital signal to the computer for processing to obtain detection data.

6. A scintillation crystal array optical crosstalk detection system according to claim 5, characterized in that: The optical fiber array module is arranged on the top of the shielding box through a support frame, and the support frame includes a horizontally arranged support plate and a mounting seat arranged below the support plate for mounting the optical fiber array module.

7. A method for detecting optical crosstalk of a scintillation crystal array, characterized in that: The detection is performed using a scintillation crystal array optical crosstalk detection system as claimed in any one of claims 1 to 4, specifically comprising the following steps: (1) Wipe the light-emitting surface of the scintillation crystal array to be detected clean and leave it in a dark place for at least 12 hours. Then, couple the light-emitting surface of the crystal array to be detected with the photosensitive surface of the photosensitive device using optical glue and place them on the stage, so that the scintillation crystal array to be detected is located above the photosensitive device. (2) determining a number of crystal units as detection points according to the number of crystal units in the scintillation crystal array to be detected; aligning the collimation hole of the collimator with the center of the crystal unit corresponding to one of the detection points in the scintillation crystal array to be detected, activating the radiation source, closing the shielding box, and measuring the radiation response value of the crystal unit and its adjacent crystal units; (3) After the measurement of the detection point is completed, the three-dimensional moving module drives the scintillation crystal array to be detected to move so that the collimation hole of the collimator is aligned with the center of the crystal unit corresponding to the next detection point, and the ray response value of the crystal unit and its adjacent crystal units is measured; (4) Repeat step (3) to complete the measurement of all detection points, turn off the ray source, and then perform optical crosstalk judgment and crosstalk ratio calculation.

8. The method for detecting optical crosstalk of a scintillation crystal array according to claim 6, characterized in that: When determining the detection points in step (2), if the number of crystal units in the scintillation crystal array to be detected is ≤500, a detection point is set for every other crystal unit; if the number of crystal units in the scintillation crystal array to be detected is >500, the scintillation crystal array to be detected is first divided into a number of detection areas, and then a crystal unit is randomly selected in each detection area as a detection point.

9. A method for detecting optical crosstalk of a scintillation crystal array, characterized in that: The detection is performed using a scintillation crystal array optical crosstalk detection system as claimed in any one of claims 5 to 6, specifically comprising the following steps: (1) Wipe the light-emitting surface of the scintillation crystal array to be detected clean and leave it in a dark place for 12 hours. Then, couple the light-emitting surface of the crystal array to be detected with the optical fiber array module using optical glue. The crystal units of the crystal array to be detected correspond to the optical fiber array module one by one. Then, place them on the stage, and make sure that the scintillation crystal array to be detected is located below the optical fiber array module. (2) Enable supercontinuum spectroscopy, use a preset wavelength band light source, and then use one of the optical fibers in the fiber array module to connect to the light source, and use the other optical fibers for measurement. Use this method to complete the measurement of all crystal units in the scintillation crystal array.

10. A method for detecting optical crosstalk of a scintillation crystal array according to claim 7 or 8, characterized in that: Use absorbent cotton or dust-free paper dipped in 120# solvent gasoline or alcohol to wipe the light-emitting surface of the scintillation crystal array to be tested.

Images