Gamma camera based on double encoding plates and method thereof for positioning radioactive materials

Abstract

The invention discloses a gamma camera based on double encoding plates and a method for positioning radioactive materials, belongs to the field of radiation detection technology and radioactive monitoring, and can obtain high-resolution radiation images greater than the number of pixels of an array detector. The gamma camera provided by the invention comprises a first encoding plate, a second encoding plate, an encoding plate switching device, an array detector, a detector position conversion device, a depth camera, a data acquisition processing system and a shielding structure. By using two encoding plates and one array detector, a higher-resolution radiological image can be obtained by performing twice radiological imaging and superimposing the images. At the same time, the energy spectrum and dose data can be obtained by the detector, and the measurement of positions, types, activities and doses of radioactive materials can be realized by combining the distance detection function ofthe depth camera, thereby realizing a multifunctional and multipurpose radioactive location positioning method.

Description

technical field [0001] The invention belongs to the fields of radiation detection technology and radiation monitoring, and in particular relates to a gamma camera based on a double coded board and a method for locating radioactive substances. Background technique [0002] As the nuclear industry and nuclear technology applications penetrate into various fields of national economic development, the safety supervision of radioactive substances and the emergency response capabilities of nuclear accidents have become issues of special concern to the nuclear safety and nuclear security industry. Accurate description of the spatial distribution of radioactive substances is crucial to improving nuclear safety supervision capabilities, and has a wide range of applications in the safety management of industrial and medical radioactive sources, emergency response to nuclear accidents, environmental radiation monitoring, and public safety. [0003] The coded aperture gamma-ray imaging ...

AI Technical Summary

Problems solved by technology

[0004] In practical application scenarios, it is very important to accurately locate radioactive substances, but limited by the small number of pixels in the gamma radiation array detector and the aperture of the coding plate cannot be too small, it is not yet possible to actually locate radioactive substances at the physical measurement level. Break through the limit of the number of detector pixels to achieve higher resolution radiological imaging

Images