Single-photon fault imaging method and system

A tomographic imaging and single photon technology, applied in computerized tomography scanners, echo tomography, etc., can solve problems such as difficulty in determining deformation maps, spatial distortion, and lack of practical application
CN101449980AInactive Publication Date: 2009-06-10北京海思威科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
北京海思威科技有限公司
Publication Date
2009-06-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a single photon fault imaging method and system, the method can acquire Gamma photons by a photomultiplier tube array through collision on a scintillation crystal to generate a fluorescent signal, the fluorescent signal is converted into a fluorescent digital signal by a data acquisition module, the fluorescent digital signal is sent into a positioning module to perform positioning calculation, the positioning data can be formed and all effective data can be converted into images, the algorithm adopted in the positioning calculation is maximum likelihood positioning algorithm guided by a mass center, at first the Gamma photon collision position can be calculated with a mass center method, then the Gamma photon collision positioning data can be formed by accurately estimating with local two-dimension maximum likelihood method in a selected scope; the system comprises the scintillation crystal, the photomultiplier tube array, the data acquisition module, the positioning module and an imaging module. The positioning accuracy of the invention is approximate to the maximum likelihood positioning method, thereby shortening the calculating time and reducing the requirements for the computer hardware and the memory space greatly.
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Description

technical field

[0001] The present invention relates to a single-photon tomographic imaging method, and also relates to a single-photon tomographic imaging system using this method, which can be mainly used for clinical diagnosis of diseases, monitoring of nuclide treatment process and scientific research (including animal imaging system), etc. . Background technique

[0002] Single-photon emission computed tomography (SPECT) is an important disease diagnostic equipment and can be used to monitor the nuclide treatment process. It receives gamma rays through scintillation crystals, and produces fluorescent flashes at the collision positions of gamma photons. The photomultiplier tube array behind the scintillation crystal receives the fluorescent flashes, generates corresponding fluorescent signals, and converts the fluorescent signals into fluorescent digital signals through the data acquisition module and sends them to the positioning module for positioning calculation, form...

Claims

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