膝关节MR不同成像方位对前交叉韧带撕裂的诊断价值

目的：探讨膝关节MR不同成像方位对前交叉韧带（anterior cruciate ligament，ACL）撕裂的诊断价值，重点探讨横断位T2WI对ACL显示及撕裂的诊断价值。方法：回顾性分析2005年10月～2007年7月间192例膝关节创伤患者MR扫描图像资料，由两位放射诊断医生分析横断位、斜矢状位及斜冠状位T2WI图像对ACL撕裂评价的准确性。结果：192例膝关节创伤患者中关节镜证实ACL损伤23例（n=23）。两名读片医生对ACL损伤评价准确性于横断位为91．7％和88．5％，斜矢状位为92．7％和93．8％，斜冠状位为95．8％和94．3％。三种成像方位对ACL损伤评价的准确性差别无统计学意义，两位读片医生读片一致性检验kappa值横断位、斜矢状位及斜冠状位分别为0．754、0．764和0．867。结论：ACL及其损伤能在T2WI横断位、斜矢状位及斜冠状位三种成像方位上清晰显示，其中横断位T2WI为膝关节扫描常规扫描方位，其价值应得到重视。

Value of different MR imaging planes in diagnosis of anterior cruciate ligament tears

Objectlve：To investigate to value of different MR imaging planes in diagnosis of anterior cruciate ligament （ACL） tears, emphasizing on axial plane.Methods：192 patients with knee trauma underwent MR imaging. Axial, parasagital and paracoronal T2-weighted images were retrospectively analyzed by two diagnostic radiologists. Results：23 ACL tears were confirmed at arthroscopy. Accuracy of two radiologists was 91.7% and 88.5%in the axial plane, 92.7% and 93.8%in the parasagital plane, 95.8% and 94.3%in the paracoronal plane. The difference between each plane was no sttasties. Interobserver agreement was 0.754 for the axial, 0.764 for the sagittal, 0. 867 for the paracoronal plane. Conclusion：ACL tears can be detected on axial, parasagital and paracoronal plane images. For axial plane is the most common and important imaging plane, its value should be recognized.