Yoshioka Hiroshi, Tanaka Toshikazu, Ueno Teruko, Carrino John A, Winalski Carl S, Aliabadi Piran, Lang Philipp, Weissman Barbara N
Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
J Magn Reson Imaging. 2007 Sep;26(3):714-9. doi: 10.1002/jmri.21084.
To investigate correlations with ulnar variance and the triangular fibrocartilage complex (TFCC) or cartilage of ulnar side of the wrist on high-resolution MRI with a microscopy coil.
We reviewed ulnar variance, TFCC, and cartilage of the ulnar side of the wrist in 93 subjects (29 asymptomatic volunteers and 64 patients with suspected TFCC injury) with high-resolution MRI using a 47-mm microscopy surface coil. All MR images were obtained with a 1.5 T scanner. Coronal 2D gradient recalled echo T(2)*-weighted images were used for analysis. For qualitative analysis we measured ulnar variance, TFCC angle, thickness in the central portion of TFCC disc proper, and cartilage thickness of the lunate and the ulnar head on MRI and calculated the correlation coefficient between measured values. We also examined the relationship between ulnar variance and age or sex.
High-resolution MR images clearly demonstrated TFCC and cartilage of the wrist and ulnar variance. The mean ulnar variance on MRI was +0.26 mm (range, -4.59 to +3.71 mm). The mean TFCC angle and TFCC thickness were 23.9 degrees (range, -4.6 to +54.1 degrees ) and 1.11 mm (range, 0.4 to 3.22 mm), respectively. Ulnar variance and TFCC angle were positively correlated (r = 0.84), and ulnar variance and TFCC thickness were negatively correlated (r = -0.71). However, ulnar variance and lunate or ulnar head cartilage thickness were not significantly correlated.
High-resolution MRI with a microscopy coil is a useful tool for evaluating the relationship between ulnar variance and ulnar side structures.
使用显微镜线圈在高分辨率MRI上研究尺骨变异与腕关节三角纤维软骨复合体（TFCC）或腕尺侧软骨之间的相关性。
我们使用47毫米显微镜表面线圈，通过高分辨率MRI对93名受试者（29名无症状志愿者和64名疑似TFCC损伤患者）的尺骨变异、TFCC和腕尺侧软骨进行了评估。所有MR图像均使用1.5T扫描仪获得。采用冠状面二维梯度回波T(2)*加权图像进行分析。对于定性分析，我们在MRI上测量了尺骨变异、TFCC角、TFCC盘中央部分的厚度以及月骨和尺骨头的软骨厚度，并计算了测量值之间的相关系数。我们还研究了尺骨变异与年龄或性别的关系。
高分辨率MR图像清晰显示了腕关节的TFCC和软骨以及尺骨变异。MRI上尺骨变异的平均值为+0.26毫米（范围为-4.59至+3.71毫米）。TFCC角和TFCC厚度的平均值分别为23.9度（范围为-4.6至+54.1度）和1.11毫米（范围为0.4至3.22毫米）。尺骨变异与TFCC角呈正相关（r = 0.84），尺骨变异与TFCC厚度呈负相关（r = -0.71）。然而，尺骨变异与月骨或尺骨头软骨厚度无显著相关性。
使用显微镜线圈的高分辨率MRI是评估尺骨变异与尺侧结构之间关系的有用工具。
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