Experimental Study on the Influencing Factors of Abdominal Low Dose CT Image Quality
LIU Shizhu1,2, ZHAO Jingxia3, HU Boqi1, YU Xikun2, ZHANG Jian4, WEI Yulin4, LIU Jingxin1,2
1. Department of Radiology, China-Japan Union Hospital, Jilin University, Changchun Jilin 130033, China; 2. Jilin Province
Engineering Research Center of Medical Imaging, Changchun Jilin 130033, China; 3. Experimental Teaching Center of College of
Nursing, Jilin University, Changchun Jilin 130021, China; 4. Changchun City Metrology and Testing Technology Research Institute,
Changchun Jilin 130012, China
Abstract：Objective The factors affecting the quality of low-dose CT imaging in the abdomen were studied experimentally.
Methods Phantoms of different diameter were scanned using CT of diverse manufactures and models with distinct scanning
parameters such as mA value, kV value, thickness and pitch. Data was acquired and statistically analyzed. Results When mAs was
less than 50 mAs, the low contrast resolution could not meet the standard. When mAs was greater than 75 mAs, the fluctuation of
noise tended to be flat. Therefore, to ensure image quality, the threshold value of low-dose abdominal CT scanning was 75 mAs.
Conclusion There are many factors affecting the quality of low-dose abdominal CT images. A correct and comprehensive
understanding of these factors is very important to the quality control and assurance of CT scanning.
刘师竺1,2，赵静霞3，胡博奇1，于喜坤2，张健4，魏宇林4，刘景鑫1,2. 腹部CT低剂量扫描的应用研究[J]. 中国医疗设备, 2019, 34(4): 9-13.
LIU Shizhu1,2, ZHAO Jingxia3, HU Boqi1, YU Xikun2, ZHANG Jian4, WEI Yulin4, LIU Jingxin1,2. Experimental Study on the Influencing Factors of Abdominal Low Dose CT Image Quality. China Medical Devices, 2019, 34(4): 9-13.
