基于ACR标准的MRI图像均匀度及层厚的检测  

The detection of image uniformity and slice thickness of MRI system based on ACR standards

作　　者：付丽媛[1] 梁永刚[1] 倪萍[2] 陈自谦[1] 陈坚[1] 李威[2] 林迪逵 刘冰川[1] 陈建新[1] 

机构地区：[1]南京军区福州总医院医学影像中心,福建福州350025 [2]南京军区福州总医院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

出　　处：《中国医学装备》2016年第7期16-19,共4页China Medical Equipment

基　　金：福建省科技计划(2016I0010)"基于同步视频脑电图;PET/CT和多模态功能磁共振对癫痫精准定位的应用研究";军事医学计量科研专项课题(2011-JL2-014)"功能磁共振成像专用体模及质量控制检测方法的研究";南京军区重大课题(14ZX23)"军人创伤后应激障碍的多模态功能磁共振研究"

摘　　要：目的:采用ACR模体对Siemens Skyra 3.0 T与GE Excite HD 1.5T磁共振成像(MRI)系统的图像均匀度及层厚进行测量,研究MRI图像均匀度及层厚的测量方法,纳入质量控制流程,以保证为诊断提供优质的图像。方法:使用美国放射学院(ACR)磁共振性能模体对2台MRI系统的图像均匀度及层厚进行检测,并根据相应的测量计算方法得出检测结果。结果:3.0T MR和1.5T MR图像的均匀度分别为96.0%和92.7%,所侧层厚分别为4.64 mm和5.58 mm,层厚偏差分别为0.36 mm和0.58 mm,所测指标均满足检测标准的要求。结论:掌握MRI图像均匀度和层厚的检测方法,定期进行检测,是保证图像质量与层厚准确性的重要质量控制手段。Objective：To detect the image uniformity and slice thickness of Siemens Skyra 3.0 T and GE Excite HD 1.5 TMRI system based on ACR standards. Methods：Image uniformity and slice thickness of MRI were measured with ACR phantom, and the detection results were calculated. Results： The image uniformity were 96.0% and 92.7% of Siemens Skyra 3.0T and GE Excite HD 1.5T MRI respectively, the slice thickness were 4.64 mm and 5.58 mm, the thickness deviation is 0.36 mm and 0.58 mm, then the results measured in the research were in the normal range. Conclusion： The detection of image uniformity and slice thickness can effectively guarantee the image quality and the accuracy of slice thickness.

关 键 词：磁共振成像系统 图像均匀度 层厚 ACR模体 质量控制 

分 类 号：R445.2[医药卫生—影像医学与核医学]