Breathing movement gating correction technology implemented with ring true photon number gating method

Abstract

The invention relates to a breathing movement gating correction technology implemented with a ring true photon number gating method, and belongs to the technical field of nuclear medical imaging. According to the breathing movement gating correction technology, data with PET scanning results in the list model format are obtained; the data are divided into N frames; in data in each frame, the ring true photon number of each ring in PET is counted; one frame is selected to serve as a reference frame, the ring true photon number of the reference frame is respectively compared with the ring true photon numbers of all frames, and absolute errors between the ring true photon numbers of other frames and the ring true photon number of the reference frame are obtained; one threshold value is selected, the absolute errors between the ring true photon numbers of the other frames and the ring true photon number of the reference frame are compared with the threshold value, and the frames with the absolute errors smaller than the threshold value are placed together to form new list model data; then three-dimensional reconstruction is carried out on the new list model data, and a clear PET image after gating correction is obtained. By means of the breathing movement gating correction technology, auxiliary devices are not required to be additionally arranged, algorithms are simple, automatic and independent operation is carried out, and the PET breathing movement correction efficiency is accordingly improved.

Description

technical field [0001] The invention relates to a respiratory movement gating correction technology using a ring true photon number gating method, and belongs to the technical field of nuclear medicine imaging. Background technique [0002] Respiratory motion can lead to PET (Positron Emission Tomography) and PET / CT thoracic and abdominal diagnostic images blurred, resulting in underestimation of the SUV (standardized uptake value) value and overestimation of the lesion volume, directly affecting the clinician's characterization of thoracic and abdominal tumor lesions, Staging and planning of radiation therapy for lesions. [0003] In order to reduce the impact of breathing motion on PET diagnostic images and improve the accuracy of PET image diagnosis, many experts and scholars have conducted in-depth research and proposed various respiratory motion correction methods in the past ten years. Among them, the respiratory motion gating method is the most widely used respirator...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: the present invention provides a respiratory motion gating correction technology based on the ring true photon number to overcome the problems of complex algorithm, low efficiency and low accuracy of the above-mentioned existing respiratory motion correction technology. The invention uses the feature that the number of true photons of the PET ring will change with the movement of the lungs to carry out PET respiratory motion gating correction technology, which can effectively reduce the respiratory motion artifacts of PET images, and make the shape and size of lung tumors and position near stationary

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