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Optical sharing detection system and detection method based on silicon photomultiplier detector
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A silicon photomultiplier tube and detection system technology, applied in the field of photoelectric detection, can solve problems affecting detection efficiency and packaging yield, achieve the effect of improving detection efficiency and time resolution, and improving yield
Active Publication Date: 2021-09-28
FMI MEDICAL SYST CO LTD
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[0004] In order to overcome the above-mentioned technical defects, the object of the present invention is to provide a light-sharing detection system and detection method based on silicon photomultiplier tube detectors, which are used to solve the problem of placing an external light guide sheet between the crystal array and the SiPM array in the existing detectors. , issues that affect detection efficiency and packaging yield
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Embodiment 1
[0047] Embodiment 1: This embodiment discloses a light-sharing detection system based on a silicon photomultiplier (SiPM), see Figure 1-Figure 3 , including a simulation platform (not shown in the figure), a front-end electronics assembly (not shown in the figure) and a detector 1, and the detector 1 includes:
[0048] Crystal assembly 11, including several crystal units distributed in an array, used to capture photons and convert them into low-energy visible light signals;
[0049] Silicon photomultiplier tube assembly 12, including several silicon photomultiplier tube units distributed in an array, is used to convert low-energy visible light signals into electrical signals. crystal coupling;
[0050] A light guide component 13, arranged between the crystal component 11 and the silicon photomultiplier tube component 12, is used to diffuse photons from the crystal component 11 to the silicon photomultiplier tube component 12;
[0051] The specific above-mentioned light guid...
Embodiment 2
[0067] Embodiment 2: This embodiment also provides a light-sharing detection method based on a silicon photomultiplier tube detector, see Figure 1-Figure 7 , applying the light sharing detection system described in the first embodiment above, comprising the following steps:
[0068] S100: Using the simulation platform to establish a physical model under the optimal crystal position, the physical model generates optical glue thickness, filament size, filament the distance parameter of the distribution;
[0069] Specifically, the simulation platform establishes the physical model of the light guide assembly under the optimal crystal position diagram, which is used to obtain the thickness of the filled optical glue 131, the optimal size of the filament 132, and the relative distance parameters of the filament 132 in the plane of the optical glue, Used to obtain the best map of crystal positions.
[0070] S200: Setting the detector according to the thickness of the optical glue...
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Abstract
The invention provides an optical sharing detection system and detection method based on a siliconphotomultiplierdetector, and relates to the technical field of photoelectric detection.The optical sharing detection system comprises a simulation platform, a front-end electronicsassembly and a detector, the detector comprises a crystalassembly, a siliconphotomultiplierassembly and a light guide assembly, and the light guide assembly comprises optical cement and a filament; the reflective thin wires are distributed on the optical cement according to distance parameters of preset thin wire distribution and are coated with reflective coatings; the simulation platform is used for generating distance parameters of optical cement thickness, filament size and filament distribution according to array information of the crystal assembly and the siliconphotomultiplier assembly; and photon position information is acquired by adopting a front-end electronics assembly, electric signal information output by a silicon photomultiplier assembly is read, the electric signal information comprises time information and energy information of electric signals, and the problem that the detection efficiency and the packaging yield are affected due to the fact that an external light guide piece is placed between a crystal array and an SiPM array of an existing detector is solved.
Description
technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a light-sharing detection system and detection method based on a silicon photomultiplier tube detector. Background technique [0002] At present, silicon photomultiplier (SiliconPhotomultiplier, SiPM) detectors are increasingly used in Positron Emission Tomography (PET) systems due to their good energy and time resolution and magnetic compatibility. . For PET detectors composed of high-efficiency, high-resolution crystal arrays and SiPM arrays, in order to reduce the cost of the SiPM array and the complexity of the readout circuit, the cross-section of a single crystal unit is generally much smaller than the area of the SiPM unit. In order to clearly distinguish these crystal units, it is necessary to place a light guide sheet between the crystal array and the SiPM array, so that some photons can diffuse to the adjacent SiPM units. The light guide sheet needs...
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