腕管综合征的MRI诊断

研究腕管综合征（CTS）的MRI特征及应用价值。材料和方法：经临床及手术证实的CTS12例，行MRI检查，以横断面为主。结果：12例CTS的MRI表现为：正中神经进入腕管时肿胀增粗12例，正中神经肿胀率（MNSR）为2．25：1。正中神经腕管内受压变扁12冽，正中神经扁平率（MNFR）为3．4。腕横韧带向掌侧膨隆10例，腕横韧带膨隆率（BR）为15．8％。T2WI像正中神经信号增高12例。结论：MRI对CTS的诊断、治疗方式的选择及疗效观察有重要的价值。

MRI Diagnosis of Carpal Tunnel Syndrome

To evaluate the diagnosis and clinical value of MRI in carpal tunnel syndrome(CTS). Materials and mothods: 12 surgical proven patients (3 male, 9 female)were studied with MRI, the images weremainly aquired in transaxial planes. Results: The MRI findings of CTS incuded: swelling of the mediannerve,best evaluated as it entered the carpal tunnel at the pisiform level, the mean median nerve swellingratio(MNSR) was 2. 25: 1. flattening of the median nerve, most reliably judged at the hamate level, reveded median nerve flattening ratio as 3. 4. palmar bowing of the flexor retinaculum, with a mean bowingradio(BR) 0f 15.8%. increased signal intensity of the medan nerve on T2WI in all 12 wrists with CTS.Conclusion: MRI is contributory to the diagnosis and treatment in patients with CTS.