Motion door control method and system in positron emission tomography

Abstract

The invention discloses a motion door control method in positron emission tomography (PET), which comprises the following steps of: dividing the acquired PET list type single event data into a plurality of data frames; generating a single event data change curve by counting the counting rate of the single event data of data frames in detection modules; regulating the single event data change curve to make the single event data change curve have obvious local interval periodicity, dividing motion sections of rotary motion by utilizing the local interval periodicity, and calculating the rotation period in each motion section; obtaining a motion phase corresponding to the data frames in each motion section by using the rotation period and the number of the data frames; and integrating the data frames with the same phase for reconstructing an image. The invention also discloses a motion door control system in PET. Under the condition of not increasing any hardware equipment, the rotary motion of an object is monitored, image artifact brought by the motion of the object can be well reduced, and the resolution of the image is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear medicine engineering imaging, and relates to a motion gating method and system in positron emission tomography imaging. Background technique [0002] Positron Emission Tomography (PET) is a non-invasive imaging technique with millimeter-level spatial resolution, which can provide quantitative information on dynamic physiological processes, and can detect human or animal tumors, cardiac diseases and neurological diseases. Early diagnosis and staging of systemic diseases can also be used for research on plant metabolic processes. Artifacts in reconstructed images caused by object movement during imaging are one of the main reasons for limiting the quality of PET imaging. Gating technology is the main method to solve image artifacts caused by object movement in PET imaging. [0003] There are many forms of motion in the PET imaging process, and these motions will affect the quality of imaging to var...

AI Technical Summary

Problems solved by technology

Compared with the patient motion in clinical PET, rotational motion is characterized by a larger motion range, which causes serious image artifacts and quantization errors. There are few relevant reports on the gating method of rotational motion.

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