Kang H S, Kindynis P, Brahme S K, Resnick D, Haghighi P, Haller J, Sartoris D J
Department of Radiology, Veterans Administration Medical Center, San Diego, CA.
Radiology. 1991 Nov;181(2):401-4. doi: 10.1148/radiology.181.2.1924779.
To provide further understanding of the magnetic resonance (MR) signal intensities in the triangular fibrocartilage (TFC) and interosseous ligaments of the wrist, the authors performed MR imaging with gross pathologic and histologic analysis in 10 cadaveric wrists. Spin-echo T1- and T2-weighted coronal images were obtained, and 3-mm coronal sections of the specimens were then made that correlated precisely with the MR images. Normal portions of the TFC showed asymmetrical bow tie-like low signal intensity, except near the radial and ulnar attachments. Degeneration of the TFC, present in all cases, was more severe on the proximal surface and was characterized by high signal intensity on T1-weighted images and less high signal intensity on T2-weighted images. These findings differed from those in TFC perforation, which showed high signal intensity on T2-weighted images. Similar signal intensity characteristics could allow differentiation of degeneration and perforation of the scapholunate and lunotriquetral ligaments. These findings suggest that in vivo MR imaging may accurately delineate degeneration and perforation of the TFC and intercarpal ligaments.
为了进一步了解腕关节三角纤维软骨（TFC）和骨间韧带的磁共振（MR）信号强度，作者对10个尸体腕关节进行了MR成像及大体病理和组织学分析。获得了自旋回波T1加权和T2加权冠状位图像，然后制作了与MR图像精确对应的3毫米厚的标本冠状切片。TFC的正常部分显示出不对称的领结样低信号强度，桡侧和尺侧附着处附近除外。所有病例中均存在TFC退变，近端表面更为严重，其特征是T1加权图像上呈高信号强度，T2加权图像上高信号强度较低。这些表现与TFC穿孔不同，TFC穿孔在T2加权图像上呈高信号强度。类似的信号强度特征可用于区分舟月韧带和月三角韧带的退变和穿孔。这些发现表明，活体MR成像可能准确描绘TFC和腕骨间韧带的退变和穿孔情况。
