Tung G A, Davis L M, Wiggins M E, Fadale P D
Department of Diagnostic Imaging, Brown University School of Medicine, Rhode Island Hospital, Providence 02903.
Radiology. 1993 Sep;188(3):661-7. doi: 10.1148/radiology.188.3.8351329.
To investigate primary and secondary signs of anterior cruciate ligament (ACL) tear at magnetic resonance (MR) imaging, the authors retrospectively reviewed 103 MR imaging examinations obtained in 99 patients, the original interpretations of these examinations, clinical records, and arthroscopy reports. Fifty cases of arthroscopy-documented complete ACL tear were included. The primary signs of ACL tear (ie, abnormal ACL morphologic features or signal intensity) had respective sensitivity and specificity values of 96% (48 of 50 examinations) and 94% (50 of 53) on sagittal images and 92% (46 of 50) and 83% (43 of 52) on coronal images. As a secondary sign of ACL tear, bone bruise involving the lateral compartment of the knee was found in 40% (20 of 50) of cases of ACL tear and in 4% (2 of 53) of cases of normal ACL. The mean curvature of the posterior cruciate ligament was increased (0.40 vs 0.27; P < .0001) in cases of ACL tear. An abnormal appearance of the ACL on sagittal images remains the single most sensitive and specific sign of ACL tear.
为了研究磁共振（MR）成像上前交叉韧带（ACL）撕裂的主要和次要征象，作者回顾性分析了99例患者的103次MR成像检查、这些检查的原始解读、临床记录和关节镜检查报告。其中包括50例经关节镜证实的ACL完全撕裂病例。ACL撕裂的主要征象（即ACL形态特征或信号强度异常）在矢状位图像上的敏感度和特异度分别为96%（50次检查中的48次）和94%（53次中的50次），在冠状位图像上分别为92%（50次中的46次）和83%（52次中的43次）。作为ACL撕裂的次要征象，40%（50例中的20例）的ACL撕裂病例和4%（53例中的2例）的ACL正常病例出现了累及膝关节外侧间室的骨挫伤。ACL撕裂病例中后交叉韧带的平均曲率增加（0.40对0.27；P <.0001）。矢状位图像上ACL的异常表现仍然是ACL撕裂最敏感和特异的单一征象。
