Detection of SNR and geometric accuracy of MRI system based on ACR standards

VernacularTitle:基于ACR标准的MRI设备图像信噪比及几何精度检测研究
Author: yuan Li FU ¹ ; gang Yong LIANG ; Ping NI ; kui Di LIN ; Hui XIONG ; chuan Bing LIU ; xin Jian CHEN ; Qun ZHONG ; Hui XIAO ; Zi-qian SHANG-WEN ; CHEN XU
Author Information

1. 福州总医院医学影像中心
Keywords: MRI; SNR; geometric accuracy; ACR phantom; quality control
From: Chinese Medical Equipment Journal 2017;38(9):74-77
CountryChina
Language:Chinese
Abstract: Objective To detect the SNR and geometric accuracy of MRI based on American College of Radiology (ACR)standards.Methods The SNR and geometric accuracy of Siemens Skyra 3.0T,Siemens Trio 3.0T and GE Excite HD 1.5T MRI were measured with ACR phantom,and the detection results were calculated according to the standards.Results The SNR values of Siemens Skyra 3.0T,Siemens Trio 3.0T and GE Excite HD 1.5T MRI were 589.98,438.50 and 277.12 respectively.Siemens Skyra 3.0T MRI had the values of geometric accuracy being-1.93％ at X direction,-3.20％ at Y direction and 0.68％ at Z direction,Siemens Trio 3.0T MRI had the value of geometric accuracy being-0.87％ at X direction,-2.33％ at Y direction and 1.49％ at Z direction,GE Excite HD 1.5T MRI had the values of geometric accuracy being 0.20％ at X direction,-1.53％ at Y direction and 1.69％ at Z direction.Conclusion The detection of the SNR and geometric accuracy of MRI can effectively guarantee the image quality.