Oblique MR imaging of the anterior cruciate ligament based on three-dimensional orientation
Oblique MR imaging of the anterior cruciate ligament based on three-dimensional orientation
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DOI：
10.1002/jmri.20922
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发表时间：
2007-09-01
影响因子：
4.4
通讯作者：
Mayerhoefer, Marius E.
中科院分区：
文献类型：
--
作者：
Breitenseher, Martin J.;Mayerhoefer, Marius E.
目的：研究前交叉韧带（ACL）的三维（313）走向，并确定斜位全长MRI检查的最佳平面。获得20名志愿者膝关节的轴向质子密度加权（PDw）图像。沿着ACL的路线和相应的切线构建3D路径沿着。测量这些切线与参考线RFL-1（连接股骨髁后缘的线）、RFL-2（穿过髁间关节间隙的线）和RFL-3（连接内侧胫骨髁前缘和后缘的线）之间的角度。这些角度被用于斜T2加权（T2 W）MRI的其余5名志愿者的膝盖，和切片的数量，描绘了整个ACL calculated.Results：ACL的平均角度为74.0度RFL-1，79.9度RFL-2，和70.4度RFL-3。RFL-1、RFL-2、RFL-3的矢状面、冠状面分别为1.4层、2.4层、1.4层。结论：矢状面与髁间关节间隙夹角80 °时显示ACL的效果最好。
Purpose: To investigate the three-dimensional (313) course of the anterior cruciate ligament (ACL) and determine the optimum planes for oblique full-length MRI of the ligament.Materials and Methods: Twenty-five healthy volunteers were examined. Axial proton density-weighted (PDw) images of the knees of 20 volunteers were obtained. 3D paths along the course of the ACL and corresponding tangents were constructed. Angles between these tangents and reference lines RFL-1 (the line connecting the posterior edges of the femoral condyles), RFL-2 (the line through the intercondylar joint space), and RFL-3 (the line connecting the anterior and posterior edge of the medial tibial condyle) were measured. These angles were used for oblique T2-weighted (T2w) MRI of the knees of the remaining five volunteers, and the number of slices that depicted the entire ACL was calculated.Results: The mean angles to the ACL were 74.0 degrees for RFL-1, 79.9 degrees for RFL-2, and 70.4 degrees for RFL-3. Full-length visualization of the ACL was demonstrated by 1.4 slices using the sagittal oblique plane prescribed for RFL-1, 2.4 slices using the sagittal oblique plane prescribed for RFL-2, and 1.4 slices using the coronal oblique plane prescribed for RFL-3.Conclusion: The ACL is best depicted using a sagittal oblique imaging plane angled at 80 degrees from a line through the intercondylar joint space.