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Method for acquiring attenuation coefficient of pet image, method and system for attenuation correction

A technology of attenuation coefficient and acquisition method, applied in the medical field, can solve problems such as low accuracy and reliability, increase human injury, increase CT radiation dose, etc., and achieve accurate and reliable results

Active Publication Date: 2020-04-10
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

However, there is no clear correspondence between the radioactivity distribution of PET and the attenuation image of γ-rays, so the accuracy and reliability of this method are low
In addition, in order to perform attenuation correction on PET whole-body imaging, another typical approach is to use CT scans to cover the entire human body to obtain attenuation images of gamma rays throughout the body, but this method increases the dose of CT radiation and increases the impact on the human body. s damage

Method used

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  • Method for acquiring attenuation coefficient of pet image, method and system for attenuation correction
  • Method for acquiring attenuation coefficient of pet image, method and system for attenuation correction
  • Method for acquiring attenuation coefficient of pet image, method and system for attenuation correction

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Embodiment Construction

[0051] The core idea of ​​the present invention is to provide a method for obtaining a PET image attenuation coefficient, which specifically includes:

[0052] Acquiring the PET data of the first predetermined section, and obtaining the PET image of the first predetermined section according to the PET data of the first predetermined section, the PET image of the first predetermined section includes the PET image of the first partial section and A PET image of the second partial segment, and segmenting the PET image of the second partial segment to obtain a first sub-region and a second sub-region;

[0053] Acquiring CT data of a second predetermined section, the first predetermined section covers the second predetermined section, and the CT data of the second predetermined section includes CT data of a first partial section;

[0054] According to the pixel data included in the PET image of the first partial section and the CT data of the first partial section, obtain a mapping...

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Abstract

The invention relates to a PET image attenuation coefficient acquisition method, attenuation correction method and system. In the case of segmental CT scanning, the CT value of the first sub-region such as bone tissue can be obtained objectively through the mapping relationship between the CT value of the CT scanning area and the pixel value of the PET scanning area, and according to the first sub-region Quantitatively obtaining the first attenuation coefficient of the first sub-region from the CT value of the region is more accurate and reliable than directly assigning the attenuation coefficient to the first sub-region such as bone tissue after image segmentation.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a method for acquiring PET image attenuation coefficients, a method and system for attenuation correction. Background technique [0002] PET / CT equipment (Positron Emission Tomography / X-ray Computed Tomography, full name PositronEmission Tomography / Computed Tomography) is a combination of PET (functional metabolic imaging) and CT (anatomical structure imaging) two imaging technologies A new type of imaging equipment that is organically combined. Specifically, PET technology is to inject radiolabeled drugs into the human body, then use detectors to detect the annihilation of radiolabeled drugs in various organs of the human body, and obtain tomographic images of human organs according to the annihilation event, and at the same time apply CT technology for The distribution of radiolabeled drugs in the human body can be precisely located, making this machine have the advantages of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/161
CPCA61B6/03A61B6/037A61B6/52G06T11/005G06T2207/30008G06T2207/10081G06T5/50G06T2207/10104G06T7/11G06T11/008G06T7/32
Inventor 顾笑悦徐天艺孙友军刘伟平
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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