MRI自动质量评价系统对层厚及几何精度检测可行性研究  

Feasibility Study of MRI Automatic Quality Evaluation System for the Detection of Slice Thickness and Geometric Accuracy

作　　者：周昕 张淳 ZHOU Xin;ZHANG Chun(Department of Medical Engineering,Beijing Ditan Hospital Capital Medical University,Beijing 100015,China)

机构地区：[1]首都医科大学附属北京地坛医院医工处,北京100015

出　　处：《中国医疗设备》2021年第8期63-66,共4页China Medical Devices

摘　　要：目的基于美国放射学院(American College of Radiology,ACR)标准,探讨MRI自动质量控制系统对层厚、几何精度检测的可行性。方法采用ACR体模,通过手动与自动两种测量方式,对GE 750w 3.0 T MRI设备图像的层厚及几何精度进行检测。图像层厚测量在第1层进行,几何精度在第5层进行。结果设备自动与手动层厚测量值分别(4.99±0.04)mm和(5.24±0.23)mm,精确度分别为99.20%±0.39%和94.66%±3.93%。体模长轴自动与手动测量值分别为(147.54±0.26)mm和(147.45±0.32)mm,精确度分别为99.69%±0.17%和99.57%±0.22%;体模左右径自动与手动测量值分别为(190.04±0.18)mm和(190.05±0.65)mm,精确度分别为99.92%±0.06%、99.74%±0.22%;体模前后径自动与手动测量值分别为(190.20±0.36)mm和(190.26±0.89)mm,精确度分别为99.84%±0.13%、99.58%±0.24%。对于层厚与几何精度,自动与手动两种测量方式得到的测量值之间差异无统计学意义(P>0.05)。结论MRI自动质量评价系统可用于MRI质量控制,且该方法优于手动处理。Objective Based on the American College of Radiology(ACR)standard,the feasibility study of MRI automatic quality control system on the detection of slice thickness and geometric accuracy was discussed.Methods The ACR phantom was used to detect the slice thickness and geometric accuracy of the image of the GE 750 w 3.0 T magnetic resonance device through manual and automatic measurement methods.The image slice thickness measurement was performed on the first slice,and the geometric accuracy was performed on the fifth slice.Results The automatic and manual slice thickness measurement values of the equipment were(4.99±0.04)mm and(5.24±0.23)mm,and the accuracy was(99.20±0.39)%and(94.66±3.93)%,respectively.The automatic and manual measurement values of the longitudinal of the phantom were(147.54±0.26)mm and(147.45±0.32)mm,and the accuracy was(99.69±0.17)%and(99.57±0.22)%respectively;The automatic and manual measurement values of R/L diameters of the phantom were(190.04±0.18)mm,(190.05±0.65)mm,the accuracy was(99.92±0.06)%,(99.74±0.22)%;the automatic and manual measurement values of the phantom’s A/P diameter were(190.20±0.36)mm,(190.26±0.89)mm,and the accuracy was(99.84±0.13)%,(99.58±0.24)%.Conclusion MRI automatic quality evaluation system can be used for MRI quality control,and this method is better than manual processing.

关 键 词：MRI 质量控制 层厚 几何精度 ACR体模 

分 类 号：R197.39[医药卫生—卫生事业管理]