Chen M C, Shih T T, Jiang C C, Su C T, Huang K M
Department of Medical Imaging, National Taiwan University, Medical College and Hospital, Taipei, ROC.
J Formos Med Assoc. 1995 Oct;94(10):605-11.
Findings from magnetic resonance imaging (MRI) studies of 50 knees were retrospectively interpreted. The results were correlated with arthroscopic findings. Multiple pulse sequences were performed including sagittal double-echo, coronal T1-weighted and gradient echo, axial gradient echo or fat suppression imaging. Three-dimensional MRI was performed if there was a high suspicion of a tear of the anterior cruciate ligament. The individual positive predictive value, sensitivity, specificity and accuracy were calculated from the comparison between MRI and arthroscopic findings of the menisci, anterior cruciate ligament and posterior cruciate ligament. The following results were obtained: 1) Tears of the medial meniscus-positive predictive value, 72%; sensitivity, 87%; specificity, 86%; and accuracy, 86%. 2) Tears of the lateral meniscus-positive predictive value, 85%; sensitivity, 85%; specificity, 90%; and accuracy, 88%. 3) Tears of the anterior cruciate ligament-positive predictive value, 88%; sensitivity, 95%; specificity, 89%; and accuracy, 92%. 4) Tears of the posterior cruciate ligament-positive predictive value, 100%; sensitivity, 100%; specificity, 100%; and accuracy, 100%. It is concluded that MRI is a noninvasive and accurate method for detecting the internal derangement of the knee.
对50个膝关节的磁共振成像（MRI）研究结果进行回顾性解读。将结果与关节镜检查结果进行关联。进行了多个脉冲序列检查，包括矢状位双回波、冠状位T1加权和梯度回波、轴位梯度回波或脂肪抑制成像。如果高度怀疑前交叉韧带撕裂，则进行三维MRI检查。根据MRI与关节镜检查半月板、前交叉韧带和后交叉韧带结果的比较，计算出各自的阳性预测值、敏感性、特异性和准确性。得到以下结果：1）内侧半月板撕裂——阳性预测值72%；敏感性87%；特异性86%；准确性86%。2）外侧半月板撕裂——阳性预测值85%；敏感性85%；特异性90%；准确性88%。3）前交叉韧带撕裂——阳性预测值88%；敏感性95%；特异性89%；准确性92%。4）后交叉韧带撕裂——阳性预测值100%；敏感性100%；特异性100%；准确性100%。结论是，MRI是检测膝关节内部紊乱的一种非侵入性且准确的方法。
