解放军福州总医院 a. 医学影像中心;b. 医学工程科/福建省医学装备管理质量控制中心,福建 福州 350025
Quality Control Test of MRI System and Action Limits Setting Based on American
College of Radiology (ACR) Standards
FU Liyuana, LIANG Yongganga, CHEN Ziqiana, ZHONG Quna, XIAO Huia, XU Shangwena, XIONG Huia, LIN Dikuib
a. Medical Image Center, b. Department of Medical Engineering, Medical Equipment Quality Control Center of Fujian Province,
Fuzhou General Hospital, Fuzhou Fujian 350025, China
Abstract:Objective To test the central frequency, spatial resolution, low contrast resolution, signal-to-noise ratio (SNR), image
uniformity, geometric accuracy and thickness of Siemens Trio 3.0 T MRI system based on ACR standards. Methods According
to the ACR standard, the ACR MRI phantom was scanned using spin echo sequence. The quality control testing parameters were
calculated in the scanned image, and then we got the test results and action limits setting. Results The mean central frequency
was (123216843.8±16.71) Hz, and action limits was≤246 Hz. Spatial resolution of both left-right and top-bottom were 1.0 mm
respectively, and action limits was ≤1.0 mm. Low contrast resolution total number of spokes on all slices was 40, while action limits
was 40. The signal-to-noise ratio was (520.214±56.20), and action limits was allowable within ±56.20. Image uniformity action
limits was ≥82%. Geometric accuracy (X-direction, Y-direction and Z-direction) action limits was within ±2 mm of the true values,
and the layer thickness should be within (5.0±0.7) mm. Conclusion The quality control testing parameters based on the ACR
standard are all in action limits.
付丽媛a,梁永刚a,陈自谦a,钟群a,肖慧a,许尚文a,熊晖a,林迪逵b. 基于美国放射学院(ACR)标准的医用磁共振成像系统质量控制检测及处置界限建立[J]. 中国医疗设备, 2018, 33(10): 7-11.
FU Liyuana, LIANG Yongganga, CHEN Ziqiana, ZHONG Quna, XIAO Huia, XU Shangwena, XIONG Huia, LIN Dikuib. Quality Control Test of MRI System and Action Limits Setting Based on American
College of Radiology (ACR) Standards. China Medical Devices, 2018, 33(10): 7-11.