摘要
目的:显示正常人膝关节软骨分层的最佳MRI序列,为关节病变的早期诊断提供技术支持。方法:选择无膝关节症状的志愿者140例,分别采用SE-T1WI、脂肪抑制二维快速小角度激发(FS-2D-FLASH)和脂肪抑制三维稳态旋进快速成像(FS-3D-FISP)三个扫描序列,行膝关节矢状面扫描。分析显示软骨分层的最佳MRI序列。结果:FLASH序列显示结果为140例中有129例显示膝关节软骨分3层,9例无分层,2例可见分5层,显示分层例数多,分层清楚,扫描时间较短;SE序列140例中有101例显示膝关节软骨分3层,39例无分层,未见分5层者,显示分层例数较少;FISP序列140例中有133例显示膝关节软骨分3层,5例无分层,2例分5层,显示分层例数多,但分层模糊,扫描时间长。结论:FS-FLASH-2D序列是显示膝关节软骨分层的最佳序列。
Objective：To investigate the best pulse sequence of MRI in demonstrating the articular cartilage layering of normal knee joint,and to provide a technical basis for the early diagnosis of knee joint diseases. Methods：The sagittal section of knee joint in 140 health volunteers were studied by MR scanning using a 1.5 Tesla super-conductive magnetic ransonance unit, with fat suppression-2D-FLASH,SE T1WI and fat supression-3D-FISP sequences. 3mm thickness was applied in FLASH and SE sequences,and 1.5mm thickness was applied in FISP sequence. The MRI appearances of the articular cartilage layering were studied and the best sequence in demonstrating the cartilage layers was selected. Results： In FLASH images,3 cartilage layers were assessed in 129 of 140 cases,5 layers were assessed in 2 cases,and only 1 layer was showed in 9 cases, which was the pulse sequence showing the maximal number and the clearest delineation of cartilage layers. In SE images,3 cartilage layers were assessed in 101 of 140 cases,only 1 layer was showed in 39 cases,no one showed 5 layers,which was the sequence showing the least number of cartilage layers. In FISP images, 133 of 140 cases showed 3 cartilage layers, 2 cases showed 5 cartilage layers,5 cases showed only 1 cartilage layer,which was the sequence showing the majority of layering, yet the cartilage layers were not clearly delineated, and the scanning time was the longest, but the layers is not clearly and long scan time. Conclusion： Fat suppression-2D-FLASH was the pulse sequence of choice for showing the articular cartilage of knee joint.
出处
《放射学实践》
2007年第7期747-749,共3页
Radiologic Practice
基金
河北省科技攻关计划项目(052761664)
关键词
磁共振成像
膝关节
关节软骨
Magnetic resonance imaging
Knee joint
Articular cartilage
