膝关节半月板撕裂的磁共振表现

MRI Manifestations of Meniscus Tear of Knee Joint

目的进一步认识膝关节半月板撕裂的磁共振成像(MRI)表现。方法回顾分析50例膝关节半月板撕裂的MRI资料,所有病例均经关节镜手术证实。采用永磁型MRI机,场强0.2T。结果50例半月板撕裂中,按照部位分类,半月板撕裂位于内侧半月板前角2例,内侧后角37例,外侧半月板前角5例,外侧后角3例,同时累及半月板前角、体部和后角者内侧2例,外侧1例。按照半月板撕裂的形式分为:水平撕裂8例;垂直撕裂4例;斜形撕裂26例;纵形撕裂3例;放射状撕裂4例;桶柄状撕裂2例;复杂撕裂3例。结论MRI能够清楚显示膝关节半月板撕裂的部位和形式,为临床治疗提供可靠的依据,是目前诊断半月板撕裂的最好的影像学检查方法。

Objective To investigate MRI manifestations of meniscus tear of the knee and to evaluate the value of MRI for diagnosing meniscus tear of the knee joint. Methods Fifty patients with meniscus tear of the knee were examined by MRI, and then the manifes- tations were retrospectively analyzed. All patients were examined with 0.2T dedicated extremity MR system, and were confirmed by subsequent arthroscopy or surgery. Results Of the 50 patients, MRI showed that the lesion was located at medial meniscus inferior horn in 2 patients, at medial meniscus posterior horn in 37 patients, at lateral meniscus irgferior horn in 5 patients, at lateral meniscus poste- rior horn in 3 patients. Of 3 patients with the tear of anterior, mid- body and posterior horn of menisci, 2 patients were in the medial meniscus, 1 patient was in the lateral meniscus. Of all patients, 8 patients were with horizontal tears, 4 patients with vertical tears, 26 patients with inclined tears, 3 patients with longitudinal tears, 4 patients with radial tears, 2 patients with bucket handle tears, 3 patients with complicated tears. Conclusion MRI of knee ioint apparently shows the location and form of meniscus tear. MRI is the best examination in diagnosis of meniscus tear of the knee.