Crystal module for gamma ray detector, manufacturing method thereof and gamma ray detector

Abstract

The invention provides a crystal module for a gamma ray detector, which comprises a crystal submodule superposed by a plurality of layers and formed by arraying a plurality of crystal bars along the width direction of the crystal bars. The plurality of the crystal bars comprise a central crystal bar and side crystal bars on two sides of the central crystal bar, and the side crystal bars on the two sides of the central crystal bar are symmetrical. The length of the central crystal bar is greater than that of the side crystal bars; and the length of inner-side crystal bars of adjacent side crystal bars is greater than that of outer-side crystal bars. One side of two sides, which is on the top surface of each crystal bar along the superposed direction of the crystal submodule and is far away from the central crystal bar, and a corresponding side on the top surface of the central crystal bar are positioned on the same inclined plane; and the bottom surfaces of various crystal bars are positioned on the same plane. The module can reduce the abrasive magnitude of the crystal bars, save the cost, reduce the abrasive time and improve the finished product rate. The invention further provides a method for manufacturing the crystal module for the gamma ray detector and the gamma ray detector with the crystal module.

Description

technical field [0001] The invention relates to the field of radiation detection, in particular to the design and manufacturing method of a crystal module used in a radiation detector, and a radiation detector with the crystal module. Background technique [0002] Radiographic imaging is to use the ray beam to project on the detector array through the measured object (such as workpieces of different shapes, human organs, etc.), and through electronic device readout and computer data acquisition and analysis system to make the internal structure of the measured object A technique by which images are reproduced on a computer screen. [0003] Radiography is a device that can not only perform external irradiation of radiation on the measured object, but also reconstruct its tomographic image around a large amount of radiation absorption data obtained by scanning, or allow the organism to receive some kind of radioactive drug first, and these drugs are gathered in a certain area....

AI Technical Summary

Problems solved by technology

[0007] First, crystal strips will inevitably have cutting damage rate, cutting error rate and scrap ratio, resulting in a certain proportion of crystal strips being scrapped, especially detector crystal strips that are the main cost of detector design, such as commonly used BGO, LSO, LYSO, etc. are relatively brittle and are easily damaged during cutting

This increases the design cost of the crystal detector

[0008] Second, the process of cutting the bevel involves most (part of the plan is all) crystals. The cutting process is complicated and time-consuming, and requires high angular accuracy of machining, which increases the threshold and cost of finding suitable machining. extended design cycle

[0009] To sum up, the crystal strips in the prior art require high cutting process, large cutting volume, high design cost and long manufacturing time

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