• Department of Nuclear Medicine, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China;
JIAZhi-yun, Email: amingjia@163.com
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Objective To analyze the influencing factors for image quality of 18F-deoxyglucose (FDG) positron emission tomography (PET)/CT systemic tumor imaging and explore the method of control in order to improve the PET/CT image quality. Methods Retrospective analysis of image data from March to June 2011 collected from 1 000 18F-FDG whole body tumor imaging patients was carried out. We separated standard films from non-standard films according to PET/CT image quality criteria. Related factors for non-standard films were analyzed to explore the entire process quality control. Results There were 158 cases of standard films (15.80%), and 842 of non-standard films (84.20%). Artifact was a major factor for non-standard films (93.00%, 783/842) followed by patients’ injection information recording error (2.49%, 21/842), the instrument factor (1.90%, 16/842), incomplete scanning (0.95%, 8/842), muscle and soft tissue uptake (0.83%, 7/842), radionuclide contamination (0.59%, 5/842), and drug injection (0.24%, 2/842). The waste film rate was 5.80% (58/1 000), and the redoing rate was 2.20% (22/1 000). Conclusion Complex and diverse factors affect PET/CT image quality throughout the entire process, but most of them can be controlled if doctors, nurses and technicians coordinate and cooperate with each other. The rigorous routine quality control of equipment and maintenance, patients’ full preparation, appropriate position and scan field, proper parameter settings, and post-processing technology are important factors affecting the image quality.

Citation: QIZhong-zhi, JIAZhi-yun. The Image Quality Analysis and Control of Whole Body Tumor Imaging with 18F-uorodeoxyglucose Positron Emission Tomography/Computer Tomography. West China Medical Journal, 2015, 30(10): 1901-1905. doi: 10.7507/1002-0179.20150544 Copy

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