Method and device used for ray detection

Abstract

The invention discloses a method and device used for initial position judgment of rays. The method used for initial position judgment of rays includes constructing a scintillator array through a simulation program; simulating an energy deposition condition after interaction between rays of different incident angles, carrying different energy and irradiating into different scintillators and the scintillator array; recording the energy deposition distribution of energy of the rays in the scintillator array; and contructing an energy distribution probability table. The invention provides a methodand device used for initial position judgment of rays and provides the novel method for initial position judgment of rays.

Description

technical field [0001] The invention relates to the technical field of nuclear spectroscopy and nuclear detection, in particular to a method and device for judging the initial position of a ray. Background technique [0002] Scintillation detector arrays are often used for position resolution, eg, in particular for detecting the position of incidence of gamma rays. In the field of nuclear medical imaging, such as gamma cameras and positron emission imaging detectors, rely on the detection of characteristic gamma rays emitted by radiolabeled drugs injected into the human body to obtain metabolic images of related tissues or organs. If the detector is biased in judging where the gamma rays hit the detector, the quality of the reconstructed image will also degrade. In fact, since the gamma ray may be scattered when interacting with the scintillator array in the detector, it is very likely that the energy of the gamma ray will be deposited in multiple scintillator detection uni...

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Problems solved by technology

[0005] like figure 1 as shown in figure 1 In the left figure in the figure, the gamma ray is incident from the No. 1 scintillator, and the E1 energy is deposited in the No. 1 scintillator, and the gamma ray energy scatters to the No. 2 scintillator, and the remaining E2 energy is deposited, and the scattering angle is θ1, When the scattering angle θ1 is less than 90°, E2 will be greater than E1, and the gamma-ray incident coordinates obtained by the center of gravity method are between the No. 1 scintillator and the No. 2 scintillator, and are closer to the No. 2 scintillator. In this case, the gamma-ray incident position determined by the center of gravity method cannot correctly reflect the original incident position of the gamma-ray

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