联勤保障部队第 900 医院（原南京军区福州总医院）a. 医学工程科/ 福建省医学装备管理质量控制中心|
b. 放射诊断科，福建 福州 350025
Research on Determination of Image Uniformity in Diagnostic Magnetic Resonance Imaging
LIN Dikuia，WU Jianweia，Fu Liyuanb，XIONG Huib，CHEN Ziqianb
a.Department of Medical Engineering, Medical Equipment Quality Control Center of Fujian Province| b. Department of Radiology, 900th Hospital of Joint Logistics Support Force (Formerly Fuzhou General Hospital of Nanjing Military Region),
Fuzhou Fujian 350025, China
Abstract：Objective To compare and analyze the difference and relationship between the uniform distributed method and the WW-WL method for MRI quality control image uniformity detection. Methods The Magphan SMR170 phantom was used to test the performance of six MRI devices. Within a short time, Uniform-distributed method and WW-WL method were used to detect the image uniformity of the front and rear lines of the test layer twice. Statistical methods were used to evaluate the consistency of the two methods. The coefficient of variation was used to evaluate the repeatability of the two methods. Results The measurement results of the two detection methods were tested by paired t-test, and P>0.05 was obtained. The difference was not statistically significant, and the measurement consistency was good. The coefficient of variation of the measured results by Uniform-distributed method was all greater than 0.16%, and the coefficient of variation of the measured results by WW-WL method was all less than 0.09% except for equipment 3. The variation coefficient of the measurement results by the WW-WL method was lower than that of the Uniform-distributed method, that is, the repeatability of the WW-WL method was better than that of the Uniform-distributed method. Conclusion Compared with the Uniform-distributed method, the WW-WL method is more suitable for the detection of image uniformity due to its advantages such as higher detection accuracy, higher sensitivity to the initial problems of related performance, quick and convenient detection procedures.
林迪逵a，吴剑威a，付丽媛b，熊晖b，陈自谦b. 医用磁共振成像系统质量控制图像均匀度检测方法的研究[J]. 中国医疗设备, 2020, 35(11): 9-11.
LIN Dikuia，WU Jianweia，Fu Liyuanb，XIONG Huib，CHEN Ziqianb. Research on Determination of Image Uniformity in Diagnostic Magnetic Resonance Imaging. China Medical Devices, 2020, 35(11): 9-11.
