a scintillation probe

A technology of scintillation crystals and shells, which is applied in the field of gamma cameras and single photon emission computed tomography devices, can solve the problems of increasing the cost of machinery and electrical control, increasing the overall weight of the probe, and heavy shielding materials, etc., to achieve good visible light transmission rate, diameter reduction requirements, and weight reduction effects

Active Publication Date: 2017-10-31
SHENZHEN BASDA MEDICAL APP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past gamma ray shielding methods of scintillation probes, lead is usually used as the shielding material, and the crystal (except the front surface), photomultiplier tube, and some front-end electronic circuits are directly packaged. This part of the shielding material is very heavy, making the overall weight of the probe increase, leading to the bulk of the final equipment, but also increased the cost of machinery and electronic control

Method used

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Embodiment 1

[0017] Such as figure 1 As shown, a scintillation probe includes a casing 1, and a dark box 3 is arranged inside the casing 1, and both the casing 1 and the dark box 3 are open at the upper and lower ends. A front-end electronic circuit 2 is provided between the top of the dark box 3 and the top of the casing 1, and a plurality of photomultiplier tubes 4 distributed in an array are arranged inside the dark box 3, and the front end of the photomultiplier tube 4 is provided with detectable gamma The scintillation crystal 7 of the ray is NaI (T1) crystal, and the scintillation crystal 7 is fixed on the opening end of the housing 1 by means of a flange 8 . A light guide 6 and an auxiliary shielding plate 5 that can shield gamma rays and an auxiliary shielding plate 5 are provided between the photomultiplier tube 4 and the scintillation crystal 7, and a front hole is provided on the auxiliary shielding plate 5 corresponding to each photomultiplier tube 4. A light guide 6 is arrang...

Embodiment 2

[0020] Such as figure 1 As shown, a scintillation probe includes a casing 1, and a dark box 3 is arranged inside the casing 1, and both the casing 1 and the dark box 3 are open at the upper and lower ends. A front-end electronic circuit 2 is provided between the top of the dark box 3 and the top of the casing 1, and a plurality of photomultiplier tubes 4 distributed in an array are arranged inside the dark box 3, and the front end of the photomultiplier tube 4 is provided with detectable gamma The scintillation crystal 7 of the ray is NaI (Tl) crystal, and the scintillation crystal 7 is fixed on the opening end of the housing 1 by means of a flange plate 8 . A light guide 6 and an auxiliary shielding plate 5 that can shield gamma rays and an auxiliary shielding plate 5 are arranged between the photomultiplier tube 4 and the scintillation crystal 7, and each photomultiplier tube 4 is provided with a front hole on the auxiliary shielding plate 5. A light guide 6 is arranged in ...

Embodiment 3

[0023]A scintillation probe comprises a casing 1, and a dark box 3 is arranged inside the casing 1, and both the casing 1 and the dark box 3 are open at the upper and lower ends. A front-end electronic circuit 2 is provided between the top of the dark box 3 and the top of the casing 1, and a plurality of photomultiplier tubes 4 distributed in an array are arranged inside the dark box 3, and the front end of the photomultiplier tube 4 is provided with detectable gamma The scintillation crystal 7 of the ray is NaI(Tl) crystal, and the scintillation crystal 7 is fixed on the opening end of the housing 1 by means of a flange 8 . Between the photomultiplier tube 4 and the scintillation crystal 7, a light guide and an auxiliary shielding plate that can shield gamma rays are provided, the auxiliary shielding plate is above the light guide, and the area of ​​the light guide and the auxiliary shielding plate covers the photoelectric converter. distribution area.

[0024] The working p...

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Abstract

A kind of scintillation probe, comprising a casing, a dark box is arranged inside the casing, both the casing and the dark box are opened at the upper and lower ends, a front-end electronic circuit is arranged between the top of the dark box and the top of the casing, and several photoelectric circuits are arranged in the dark box A conversion device, the front end of the photoelectric conversion device is provided with a scintillation crystal that can detect gamma rays, and the scintillation crystal is fixed on the opening end of the housing by means of a flange; a shieldable Light guide and auxiliary shielding plate for gamma rays. The invention reduces the shielding space to only shielding crystals without including photoelectric conversion devices, the shielding space is greatly reduced, less shielding materials are used, and the overall weight is correspondingly reduced.

Description

technical field [0001] The invention relates to the field of nuclear medical imaging equipment, especially for gamma cameras and single photon emission computed tomography devices. Background technique [0002] The scintillation probe is a gamma ray detection device, which consists of a collimator, a scintillation crystal (a scintillation substance that detects gamma ray), a photomultiplier tube (a photoelectric conversion device), and a front-end electronic circuit. The collimator limits the incident direction of the gamma ray, and only the gamma ray whose incident direction satisfies certain conditions can enter and irradiate the scintillation crystal from the front face of the scintillation crystal; the function of the scintillation crystal is to convert the gamma ray into a photoelectric The fluorescence detected by the multiplier tube; behind the scintillation crystal is a matrix of photomultiplier tubes or position-sensitive photomultiplier tubes, which are particularl...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01T1/202
Inventor曹文田莫海均陈文波
OwnerSHENZHEN BASDA MEDICAL APP