Drapé J L, Dubert T, Silbermann O, Thelen P, Thivet A, Benacerraf R
Department of Bone-Joint Radiology, Hôpital Bichat, Paris, France.
Radiology. 1994 Aug;192(2):469-76. doi: 10.1148/radiology.192.2.8029417.
To assess detectability of the components of the extensor hood, especially the sagittal bands, with magnetic resonance (MR) imaging in normal and injured metacarpophalangeal (MP) joints.
T2*-weighted, T1-weighted, and contrast material-enhanced T1-weighted images were obtained of 54 normal MP joints (108 sagittal bands). The ability to detect the sagittal bands with each sequence was rated for three observers. These same sequences were used for MR imaging of nine patients with acute MP injury. Seven patients underwent surgery.
The sensitivity of MR imaging for the detection of normal sagittal bands was 0.89-0.92 for T2*-weighted images, 0.80-0.88 for T1-weighted images, and 0.81-0.91 for contrast-enhanced T1-weighted images. MR imaging findings in patients with extensor hood injury included irregularity, poor definition, and increased signal intensity or uptake of contrast material by structures in and around the extensor hood. All MR imaging findings correlated well with those of surgery.
MR imaging is accurate for determination of the presence and severity of injury to the extensor hood.
利用磁共振成像（MR）评估正常和损伤的掌指关节（MP）中伸肌帽各组成部分，尤其是矢状带的可检测性。
对54个正常MP关节（108条矢状带）进行T2*加权、T1加权及对比剂增强T1加权成像。由三名观察者对每个序列检测矢状带的能力进行评分。对9例急性MP损伤患者进行相同序列的MR成像检查。其中7例患者接受了手术。
T2*加权成像检测正常矢状带的敏感度为0.89 - 0.92，T1加权成像为0.80 - 0.88，对比剂增强T1加权成像为0.81 - 0.91。伸肌帽损伤患者的MR成像表现包括不规则、边界不清以及伸肌帽内及周围结构的信号强度增加或对比剂摄取增加。所有MR成像表现与手术结果相关性良好。
MR成像对于确定伸肌帽损伤的存在及严重程度是准确的。
