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PET scattering correction method, PET imaging method and PET imaging system

A scatter correction and imaging method technology, applied in the field of scatter correction and PET imaging systems, can solve the problems of PET imaging resolution and contrast, reduce the quantitative accuracy of resolution imaging, etc., to ensure consistency and reduce accuracy drop Effect

Active Publication Date: 2017-03-15
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

[0004] However, in the latest TOF-PET scanners, while the coincidence count acquisition for all oblique response lines increases the sensitivity of the system relative to conventional 2D and extended 2D data acquisition modes, it also introduces a large number of scattered coincidence counts, This reduces the resolution of the system and the quantitative accuracy of imaging; similarly, in data acquisition using a lead or tungsten baffle, the photon scattering generated on the baffle will also greatly affect the resolution and contrast of PET imaging. Impact

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  • PET scattering correction method, PET imaging method and PET imaging system
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[0066] Some embodiments of the present application will be described below. It should be pointed out that, in the process of describing these implementations, for the sake of concise description, it is impossible for this specification to describe all the features of the actual implementations in detail.

[0067] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application, and those skilled in the art can also apply the present application to other similar scenarios. In addition, it can also be understood that although such development efforts may be complex and lengthy, for those of ordinary skill in the art relevant to the content disclosed in this application, the technology disclosed in this application Some design, manufacturing or production changes based on the content are just conventional technical means, and should not be understood as insufficient content disclosed in this application.

[0068]...

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Abstract

The invention provides a PET scattering correction method. The PET scattering correction method comprises the steps that TOF-PET data of a target zone of a subject is obtained when PET scanning is conducted on the subject, wherein the TOF-PET data includes coincidence event data and TOF data; a PET image of the target zone is obtained according to the coincidence event data; initial scattering estimation for TOF-PET imaging is obtained based on the PET image and the TOF-PET data; correction processing is conducted on the initial scattering estimation to obtain scattering estimation for TOF-PET imaging; scattering correction is conducted on the TOF-PET data based on the scattering estimation for TOF-PET imaging. By the adoption of the PET scattering correction method, the scattering estimation accuracy can be improved, and the quality of TOF-PET images can be improved. In addition, the invention further provides a PET imaging method and system.

Description

technical field [0001] The present application relates to the technical field of positron emission tomography (Positron Emission Tomography, PET), and in particular to a scattering correction method, PET imaging method and PET imaging system based on time of flight (Time of Flight, TOF) positron emission tomography. Background technique [0002] Positron emission computed tomography is a non-invasive medical imaging technique to detect the metabolic characteristics of human or animal organs. It has the characteristics of high sensitivity, good accuracy and accurate positioning. In PET imaging, the radiopharmaceutical that can emit positrons is injected into the organism, and the positrons annihilate with the electrons in the organism, producing two gamma photons with opposite directions and energy of 511keV, surrounding the measured organism The detector detects the pair of photons and stores its information in the form of coincidence counts. If there are enough coincidence ...

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Application Information

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IPC IPC(8): A61B6/03G06T11/00
CPCA61B6/037A61B6/5205A61B6/5229A61B6/5282G06T7/0012G06T11/005G06T2207/10081G06T2207/10088G06T2207/10104G06T2211/421G06T2211/424
Inventor 朱闻韬李弘棣
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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