中国医疗设备2017，Vol.32Issue(4)：66-69,4.DOI:10.3969/j.issn.1674-1633.2017.04.018
关于MRI质量控制中ROI对信噪比检测影响的研究
Research on the Effect of Region of Interest on Signal to Noise Ratio Evaluation in MRI Quality Control
林迪逵 1倪萍 2陈冲2
作者信息
- 1. 福州大学 电气工程与自动化学院,福建福州 350116
- 2. 南京军区福州总医院医学工程科,福建福州 350025
- 折叠
摘要
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.关键词
磁共振成像/信噪比/感兴趣区域/图像噪声/检测体模Key words
magnetic resonance imaging/signal to noise ratio/region of interested/image noise/test phantom分类
医药卫生引用本文复制引用
林迪逵,倪萍,陈冲..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):66-69,4.
