A scintillator array luminescence decay time testing method

Abstract

The invention relates to the technical field of radiation detectors, in particular to a method and device for testing luminescent decay time of a scintillator array. The method comprises the steps that a photodetection array receives a scintillation light emitted by the detected scintillator array and converts the light into an electrical pulse signal; the obtained electrical pulse signal is transmitted to a resistance network and integrated into output of four paths, and the electrical pulse signals output from the four paths are respectively sent to a pulse shape analysis system through fourpreamplifiers to obtain four-path pulse shape information; the obtained four-path pulse shape information is calculated to obtain the coordinate position of each scintillator illumination event and the luminescent decay time distribution of the scintillator before correction; the luminescent decay time is corrected to obtain the luminescent decay time distribution of each scintillator of the detected scintillator array. The method can be used for the light yield and time performance evaluation of the scintillator array, and greatly improve the test selection efficiency of the scintillator light yield and the luminescent decay time.

Description

technical field [0001] The invention relates to the technical field of radiation detectors, in particular to a method and device for testing the luminescence decay time of a scintillator array. Background technique [0002] In the field of radiation detectors, scintillator detectors are widely used in the detection fields of γ-rays, X-rays, β-rays, neutrons, and cosmic rays. Especially in nuclear medical instruments, the current mainstream SPECT and PET detectors all use scintillator detectors. [0003] As the core component of the scintillator detector, the performance of the scintillator itself, such as light yield and luminescence decay time (decaytime), has a fundamental impact on the final energy spectrum and time characteristics of the detector. For individual scintillators, there are many well-established methods to evaluate these properties. [0004] However, in modern radiation imaging detectors, especially PET detectors, scintillator arrays composed of dozens or ...

AI Technical Summary

Problems solved by technology

In this application, it is obviously too inefficient to use the traditional scintillator performance test method to test each scintillator during the scintillator array manufacturing process, and the traditional single scintillator performance test method cannot be used in the final detection of the array performance. Distinguish the performance of each scintillator, so there is a need for a more efficient and accurate method to solve this problem

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