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Gamma camera-based radioactive substance detection method, device and system thereof

A radioactive material and gamma camera technology, applied in the field of radiation detection, can solve the problems of inability to perform gamma radiation imaging at the same time, inability to achieve accurate registration and fusion of visible light images and gamma radiation images, etc.

Active Publication Date: 2016-01-20
BEIJING NOVEL MEDICAL EQUIP LTD +1
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Problems solved by technology

However, in the prior art, when the gamma camera and the visible light camera have different optical paths, the precise registration and fusion of the visible light image and the gamma radiation image of the radioactive substance cannot be realized for the radioactive substance whose distance from the equipment is unknown; When the gamma camera and visible light camera are in the same optical path, gamma radiation imaging and visible light imaging cannot be performed at the same time

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  • Gamma camera-based radioactive substance detection method, device and system thereof
  • Gamma camera-based radioactive substance detection method, device and system thereof
  • Gamma camera-based radioactive substance detection method, device and system thereof

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Embodiment Construction

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0043] An embodiment of the present invention provides a method for detecting radioactive substances based on a gamma camera. The method is based on existing gamma camera imaging techniques for imaging long-distance, large-spatial fields of view. figure 1 is a schematic structural diagram of a detection device according to an embodiment of the present invention. Such as figure 1 As shown, the detection device includes: a gamma camera 10 and a computing device 20 . The gamma camera 10 communicates with the computing device 2...

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Abstract

The invention provides a radioactive substance detection method, a radioactive substance detection device and a radioactive substance detection system based on a gamma camera. The detection method comprises the following steps of: receiving gamma photons incident from all directions of a target angle plane (alpha, beta) defined by radioactive substances by using the gamma camera; generating gamma photon energy spectrums and projection data of the radioactive substances; and reconstructing the projection data by using a 'maximum likelihood estimation' statistical iterative algorithm to obtain a gamma radiation image with quantitative information. By the method, the spatial resolution and the signal to noise ratio of the gamma radiation image are increased, spaces of the radioactive substances are positioned, the radiation dose is measured, nuclide types of the radioactive substances are identified, and the radioactive activity is measured.

Description

technical field [0001] The invention relates to the technical field of radiation detection, in particular to a method for detecting radioactive substances based on a gamma camera, a device and a system thereof. Background technique [0002] The location of radioactive substances, radiation dose measurement, nuclide type identification and activity measurement have a wide range of applications in the fields of nuclear industry, nuclear safety, environmental protection, industrial and medical radioactive source management, and public safety. [0003] Traditional methods used to detect radioactive substances mainly include: dosimeters, gamma spectrometers and gamma cameras. Among them, the gamma camera realizes the two-dimensional plane distribution imaging of radioactive substances by detecting the gamma photons collimated by the collimator. Moreover, the gamma camera also has the function of measuring the gamma radiation dose rate or particle fluence rate at the position of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/29G01T1/08G01T1/38
Inventor 陈思刘亚强王石马天予龚光华何峰孙剑江年铭刘迈
Owner BEIJING NOVEL MEDICAL EQUIP LTD
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