Research on the Effect of Region of Interest on Signal to Noise Ratio
Evaluation in MRI Quality Control
LIN Di-kui1,2, NI Ping2,
CHEN Chong1
1.College of Electrical Engineering and
Automation, Fuzhou University, Fuzhou
Fujian 350116, China; 2.Department of
Medical Engineering, Fuzhou General
Hospital of Nanjing Military Command,
Fuzhou Fujian 350025, China
Abstract：Objective To research the effect of the change of region of interest (ROI) on the signal to
noise ratio (SNR) detection based on the regulation of metrological verification implemented in some
areas of China, so as to proposed a suitable proportion of ROI to improve the objectivity and accuracy of
the image SNR’s evaluation. Methods Automatic evaluation module was developed based on phantom
SMR170 and combined with SNR detection principle. SNR with different ROI was evaluated by this
module, and SNR trend changing with ROI was discussed. Results The change of ROI had a significant
effect on the SNR results. The value of image noise increased with the enlargement of ROI, while SNR
of the image reduced accordingly. Conclusion It is suggested that the selection ratio of ROI is between
0.60 and 0.75, which effectively reduce the artificial measurement error and ensure the evaluation result
objectively reflected the performance of the imaging system.
林迪逵1,2，倪萍2，陈冲1. 关于MRI质量控制中ROI对信噪比检测影响的研究[J]. 中国医疗设备, 2017, 32(4): 66-69.
LIN Di-kui1,2, NI Ping2,
CHEN Chong1. Research on the Effect of Region of Interest on Signal to Noise Ratio
Evaluation in MRI Quality Control. China Medical Devices, 2017, 32(4): 66-69.
