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Detecting method and equipment for X-or gamma-radiation imaging

A technology of gamma radiation and detection device, applied in the field of nuclear technology application, can solve the problems of unfavorable discovery of organic prohibited items, inability to obtain backscattered images, and lack of availability.

Inactive Publication Date: 2002-04-10
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] ① What is obtained is only the transmission image of X and γ radiation, but not the backscattered image of the object;
[0004] ②It does not have the function of automatically "highlighting" the image of the organic matter in the subject's body, thus losing a lot of important information, which is not conducive to the discovery of organic prohibited items

Method used

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  • Detecting method and equipment for X-or gamma-radiation imaging
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  • Detecting method and equipment for X-or gamma-radiation imaging

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Embodiment 1

[0030] Embodiment 1 of the first aspect of the present invention relates to a non-destructive testing method capable of obtaining X, γ backscattered digital images, comprising the following steps:

[0031] 1) Install a backscatter array detection device with a grid-shaped collimator between the ray source and the object of the X, γ imaging detection system, so that it only accepts and detects the backscatter from the object to be inspected;

[0032] 2) The X or γ-ray is collimated by the front collimator into a longitudinal sheet-like beam;

[0033] 3) The backscatter emitted when the sheet-shaped ray beam enters the object to be inspected passes through the grid-shaped collimator and then enters each detector element of the backscatter array detection device;

[0034] 4) Due to the effect of the grid-shaped collimator, each detector element of the backscatter array detection device is aimed at different parts in the ray action area on the object to be inspected, and the backs...

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Abstract

An X-or gamma-radiation imaging detection method and equipoment for nuclear technique is composed of ray source, front collimator, drive mechanism, the backscatter detector array and its signal acquiring and processing system for detecting the backscattered signals from different positions of object, the transmission detector array and its signal acquiring and processing system behind the object,and post collimator. It can brightent the images of organic substances and the substance rich in hydrogen, and acquire overall information about object.

Description

technical field [0001] The invention belongs to the application field of nuclear technology, and in particular relates to an X or gamma backscattering and transmission imaging non-destructive detection technology for inspecting the internal conditions of objects such as containers, trucks, luggage and the like. Background technique [0002] Existing gamma radiation imaging container detection devices or accelerator X-ray imaging container detection devices (hereinafter referred to as "detection devices"), as shown in Chinese invention patents ZL96102080.6, ZL98101501.8 and ZL86108035, all use transmission imaging mode to detect containers and other objects. They can well meet the needs of customs inspections and play an important role. However, they also have some shortcomings: [0003] ① What is obtained is only the transmission image of X and γ radiation, but not the backscattered image of the object; [0004] ②It does not have the function of automatically "highlightin...

Claims

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Application Information

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IPC IPC(8): G01N23/04G01N23/18
Inventor 安继刚向新程王立强刘以思邬海峰刘金汇周立业吴志芳刘锡明谈春明张玉爱
Owner TSINGHUA UNIV