Image attenuation correction method and device

Abstract

The invention discloses an image attenuation correction method and device and belongs to the technical field of medical imaging. The image attenuation correction method comprises the steps that a first mode image is reconstructed according to first image data and is converted into an attenuation correction image; a second mode image of each gating phase is reconstructed according to second image data; image registration is conducted on the attenuation correction image and the second mode image corresponding to each gating phase to obtain an attenuation correction image of each gating phase; according to the attenuation correction image of each gating phase, the second mode image of each gating phase is reconstructed. The problem is solved that in the relevant art, the matching of PET and CT images is reduced due to the movement in the examination process or the physiological process of a subject, accordingly attenuation correction malposition of the PET images is likely to produce andattenuation artifacts are produced in the PET images, and the advantages of attenuation correction of PET data and quality improvement of PET images are achieved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of medical imaging, and in particular to an image attenuation correction method and device. Background technique [0002] Positron Emission Tomography (PET) is a three-dimensional imaging non-destructive testing technique that utilizes the injection of positron radioactive isotope-labeled compounds into organisms to measure their spatial distribution and time characteristics in vitro, with high sensitivity. , good accuracy and accurate positioning. [0003] The working principle of PET is: label the radionuclides that emit positrons on the compounds that can participate in the blood flow or metabolic process of human tissues, inject the radionuclides marked with compounds with positrons into the subjects, and let the subjects PET imaging was performed within the effective field of view of PET. During the PET scanning process, the positrons emitted by the radionuclide combine with the ...

AI Technical Summary

Problems solved by technology

However, various physiological processes such as the subject's breathing and / or heartbeat can affect the matching of PET and CT images even without taking into account the voluntary or controlled movements that the subject may be making

When the matching between the PET image and the CT image is low, the PET image is prone to attenuation correction misalignment, which will lead to attenuation artifacts in the PET image

Because the attenuation artifacts are easy to increase the misdiagnosis rate of doctors, there is an urgent need for a method to correct the attenuation of PET images

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