MAVRIC-SL技术在膝关节金属置换术后3.0T MR成像上的应用价值  

Application of MAVRIC-SL Technique of Knee Joint Metal Replacement at 3.0T MRI

作　　者：陈庭宇 唐鹤菡[1] 姚凯 徐慧[1] 张金戈[1] CHEN Ting-yu;TANG He-han;YAO Kai(Department of Radiology,West China Hospital of Sichuan University,Chengdu 610041,Sichuan Province,China)

机构地区：[1]四川大学华西医院放射科,四川成都610041 [2]四川大学华西医院骨科,四川成都610041

出　　处：《中国CT和MRI杂志》2020年第9期166-169,F0002,共5页Chinese Journal of CT and MRI

基　　金：四川省医学科学研究课题(编号:16PJ009)。

摘　　要：目的探讨MAVRIC-SL技术在膝关节金属假体置换后3T磁共振成像中的应用价值。方法收集在本院行钛合金材料膝关节置换后需磁共振复查的18名患者。所有患者均在GE 750W 3.0T MRI扫描仪上行术后膝关节冠状及矢状位的PD-FSE及PD-MAVRIC-SL扫描。分别测得两组图像金属假体及周围伪影区域面积大小,记录两组图像的异常病变发现数,并采用双盲法对两组图像的诊断信心、解剖细节、金属植入物与组织交界处可视化进行评分。结果 (1)图像金属假体及周围伪影面积在PD-MAVRIC-SL序列的冠状位(47.47±1.87)cm^2和矢状位(45.05±2.09)cm^2上分别小于PD-FSE的冠状(62.7±1.11)cm^2及矢状(59.87±0.52)cm^2(P<0.05);(2)MAVRIC-SL序列对在金属植入物与组织交界面显示及伪影评分、解剖结构的显示均优于(FSE序列(P<0.05);(3)MAVRIC-SL序列较FSE序列更利于异常病变的发现(P<0.05)。结论较传统FSE序列而言,MAVRIC-SL序列可明显降低膝关节置换术后金属伪影、改善图像质量、提高诊断信心,具有重要的临床应用价值。Objective To explore the application value of MAVRIC-SL technique in patients with metal prosthesis replacement at 3T MRI.Methods 18 patients with Titanium alloy prosthesis were recruited.All patients underwent the MRI examination (GE Discovery 750W 3.0T) with FSE and MAVRIC-SL in coronal and sagittal plane.The area of metal implants and surrounding artifacts were measued.The display and artifact of interface between metal implant and tissue,the anatomical details and the diagnosis confidence were scored by double-blind methods.The number of abnormal lesions found in two groups were recorded.Results (1) The area of metal implants and surrounding artifacts of PD-MAVRIC-SL in coronal plane (47.47±1.87)cm^2 and in sagittal plane (45.05±2.09)cm^2 were less than PD-FSE coronal plane (62.7±1.11)cm^2 and sagittal plane (59.87±0.52)cm^2 respectively (P<0.05).(2) The display and artifact of interface between metal implant and tissue,the anatomical details and the diagnosis confidence of MAVRIC-SL were superior to FSE (P<0.05).(3) Compared with FSE,MAVRIC-SL is beneficial to detecting abnormal lesions (P<0.05).Conclusion Compared with FSE technique,MAVRIC-SL technique could reduce the artifacts of imaging,improve the qualification of image,increase the diagnosis confidence significantly in patients with knee metal arthroplasty.

关 键 词：膝关节 MAVRIC-SL技术 金属伪影 金属假体 

分 类 号：R322.72[医药卫生—人体解剖和组织胚胎学]