膝关节侧副韧带MRI显示方法分析

目的 探讨正常人膝关节侧副韧带MRI检查方法及表现. 方法 对55例成人选择矢状面、冠状面、后斜冠状面进行MR扫描,观察侧副韧带显示的情况,测量内、外侧副韧带的有关数据,并与解剖文献大体测量结果进行比较. 结果 (1)矢状面上内侧副韧带的定位线与胫骨干长轴的夹角为0.55°±0.25°;外侧副韧带的定位线与腓骨颈长轴的夹角为11.47°±1.61°.(2)内侧副韧带在常规冠状位1个层面上完整显示占96%,同时外侧副韧带在1个层面上完整显示占82%;外侧副韧带在11°后斜冠状位1个层面上完整显示占90%.(3)正常内、外侧副韧带在T1WI和PDWI上均呈扁平条状低信号,平均长度分别为11.53 cm和5.31 cm.结论选择完全显示胫骨干、腓骨颈的矢状面为基准面,层厚3 mm MR扫描能很好地显示内、外侧副韧带的解剖结构.

MRI Analysis of the Way in Showing Collateral Ligaments of Knee

Objective To study the way in showing collateral ligaments of knee by MRI and MRI findings of the normal collateral ligaments.Methods MR imaging examinations were performed in 55 healthy volunteers . MR imaging included T1WI and PDWI sequence on the coronal, sagittal and coronal posterior oblique plane, in order to observe the collateral ligaments, and to measure the medial collateral ligament and the lateral collateral ligament dimension, which were compared with the results of the cadaver published in the related anatomic literatures.Results (1)On sagittal MRI, the angle between the line of medial collateral ligament and the tibia long axis was 0.55°±0.25°,the angle between the line of lateral collateral ligament and the long axis of the fibular neck was 11.47°±1.61)°.(2)On coronal MRI, 96% of the medial collateral ligaments was completely showed on only one slice, at the same time, 82% of the lateral collateral ligaments was completely showed on only one slice .On 11°coronal posterior oblique plane,90% of the lateral collateral ligaments was completely showed on only one slice .(3)The normal medial and lateral collateral ligaments were hypointense string on both T1WI and PDWI coronal MR images , with an average length of 11.53 cm for the medial collateral ligament and 5.31 cm for the lateral collateral ligament.Conclusion Using sagittal plane completely shown the tibia and fibular neck as the standard plane and thickness of 3mm in examining the collateral ligaments of knee by MR imaging can display the medial and the lateral collateral ligament clearly .