Correction information acquisition method for performing attenuation correction on PET images of breath or heart

A technology of attenuation correction and correction information, which is applied in the field of PET systems, can solve the problems of attenuation image truncation, increased workload of doctors, and low signal-to-noise ratio of gated images, so as to improve image signal-to-noise ratio, solve attenuation artifacts, and improve The effect of image quality
CN110458779BActive Publication Date: 2021-11-16JIANGSU SINOGRAM MEDICAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JIANGSU SINOGRAM MEDICAL TECH CO LTD
Publication Date
2021-11-16

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Abstract

The invention discloses a correction information acquisition method for performing attenuation correction on PET images of breathing or heart. The method includes: acquiring PET detection data with time-of-flight information and gating signals reflecting periodic movement of breathing or heart; The PET detection data of a cycle is divided into B phases, the PET detection data of the same phase in all cycles are combined, the sum of each phase is obtained, and the transformation matrix between any phase in the B phases and the basic phase is obtained, and the transformation is established. The first relationship between the matrix and the estimated value of the PET activity distribution corresponding to each phase; obtain the PET activity distribution estimation model corresponding to the basic phase; iteratively process the PET activity distribution estimation model to obtain The PET activity distribution corresponding to the basal phase. The foregoing can solve the problem of attenuation artifacts in PET image reconstruction in the prior art, and can ensure accurate quantification of attenuation correction.
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Description

technical field

[0001] The invention relates to the field of medical imaging, in particular to a correction information acquisition method and a PET system for performing attenuation correction on PET images of respiration or heart. Background technique

[0002] Positron Emission Tomography (PET) is a high-end nuclear medicine imaging diagnostic equipment. Use of radionuclides (such as 18 F. 11 C, etc.) Label metabolites and inject nuclides into the human body, and then perform functional metabolic imaging on patients through PET system to reflect the metabolic activities of life. PET scans are usually matched with other modal scans (such as CT, MRI, etc.) to obtain the imaging of the patient's anatomical structure. The tissue density distribution of the patient is obtained, the attenuation property (attenuation coefficient) of the tissue to the radiation is calculated, and then applied to the image reconstruction, the attenuation correction is performed on the PET data, ...

Claims

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