Research on Automatic Measurement of SNR and Uniformity in MRI Quality Control Test
CHEN Jiamin1,2, LIANG Yonggang3, YE Peiyun1,2, CHEN Chujie1,2, FU Liyuan1,2
1. Department of Radiology, Fuzong teaching hospital, Fujian University of Traditional Chinese Medicine, Fuzhou Fujian 350025,
China; 2. Department of Radiology, The 900th Hospital of Joint Logistics Support Force, Fuzhou Fujian 350025, China; 3. General
Hospital of Eastern Theater Command, Nanjing Jiangsu 210002, China
Abstract：Objective Based on the quality control of magnetic resonance imaging system using ACR volume model, to design
the image signal to noise ratio (SNR) and uniformity automatic measurement software to improve the efficiency of measuring
quality control parameters. Methods Based on the SNR and uniformity measurement method of ACR body model quality control
detection image, and according to image characteristics, image preprocessing and feature extraction algorithms were designed and
written on Matlab R2013b platform to realize automatic processing and analysis of SNR and uniformity of image. Bland-altman
statistical method was used to evaluate the consistency between manual measurement and automatic measurement. Results The
automatic detection program designed and written based on Matlab R2013b platform realized the automatic measurement of SNR
and image uniformity. The Bland-Altman diagram showed that the data of the SNR measured by manual measurement and automatic
measurement were within the range of the consistency limit (-53.1, 40.5), and the data of the image uniformity were within the range
of the consistency limit (-4.7%, 3.0%), indicating that the consistency of the two methods was good. Conclusion The automatic
measurement software based on Matlab platform is easy to implement, can greatly improve the efficiency of quality control parameter
measurement, and is expected to replace manual measurement.
陈佳敏1,2，梁永刚3，叶培筠1,2，陈楚洁1,2，付丽媛1,2. MRI系统质量控制检测的SNR及均匀度的自动测量研究[J]. 中国医疗设备, 2022, 37(8): 160-163.
CHEN Jiamin1,2, LIANG Yonggang3, YE Peiyun1,2, CHEN Chujie1,2, FU Liyuan1,2. Research on Automatic Measurement of SNR and Uniformity in MRI Quality Control Test. China Medical Devices, 2022, 37(8): 160-163.
