磁共振斜冠状位扫描对正常膝关节前交叉韧带的显示作用

The displaying value of thin scan of oblique coronal MR images on anterior cruciate ligament

目的探讨磁共振斜冠状位扫描对膝关节前交叉韧带的显示价值。方法对60例正常膝关节行常规扫描,包括斜矢状位、冠状位、横断位。所有病例均行在斜矢状位图像基础上平行于前交叉韧带FSE序列斜冠状位薄层无间隔质子密度加权扫描,分析斜冠状、斜矢状、冠状及横断位对前交叉韧带的显示情况。结果斜冠状可清楚全程显示前交叉韧带于一幅图片上,显示率为100%(60∕60),斜矢状位显示率为86.7%(52∕60),而横断及冠状位则分段显示前交叉韧带,即不能在一幅图中完整显示前交叉韧带。结论斜冠状位扫描符合前交叉韧带解剖走向,可明显提高前交叉韧带的完整显示率,有利于其损伤后评价。

Objective To investigate the value of oblique coronal MR images in visualization of tile anterior cruciate ligament （ACL）. Methods Conventional scan was performed in 60 normal knees, including axial section, coronal section and median sagittal section. Then thin scan of oblique coronal which was paralled to ACL, based on FSE conventional oblique sagittal images, was acqired. The visualization of ACL on thin scan of oblique coronal, axial, coronal and obligue sagittal were analysed. Results The clear visualization of the whole ACI. was 100% （60/60） shown on one image of the thin scan of oblique coronal, 86.7 % （52/60） on one of the Conventional oblique sagittal images while it was sectionally shown on the images of axial section and coronal section, that is, it can＇t be completely shown on one image. Conclusion The thin scan of oblique coronal agrees with the dissect trend of anterior cruciate ligament and significantly improves the complete display rate of anterior cruciate ligament, benefiting its assessment after it is damaged.