平山病屈颈位磁共振扫描技术研究

MR scans of Hirayama Disease by neck-flexion position

目的:探讨平山病屈颈位磁共振扫描技术成功的关键。方法:对6例临床确诊平山病患者行屈颈位磁共振扫描,采用GE 1.5T HD扫描系统,CTL线圈。均行两次屈颈位MR扫描(传统过屈位:患者单纯颈部垫楔形物;优化的过屈位:颈部垫楔形物同时要求患者收下颌),比较两次硬膜外腔宽度,对比分析流空血管的显示情况。结果:优化的屈颈扫描硬膜外宽度明显大于传统的屈颈扫描(P<0.05),两者存在显著性差异;流空血管的显示,传统的屈颈扫描3例,优化的屈颈扫描5例。结论:在平山病屈颈位磁共振扫描技术中,收下颌是扫描成功的关键,能清楚显示扩张的硬膜外腔和流空的异常血管。

Objective： To explore the key technique of MR scanning for the patients with Hirayama disease （HD）. Methods： 6 patients clinical diagnosed as HD performed MR scan on GE 1.5T HD with the coil of CTL in two different flexion positions （the traditional flexion position： putting a wedge beneath the patient′s neck;the optimized -flex position： putting the wedge beneath the patient′s neck and make the patient′s mandible close to the neck）. The width of the epidural space and the flow - void effect were compared between the two flexion positions. Results ： The width of epidural space in the optimized - flexion position was larger than that of the traditional flexion position （P〈0.05 ）. The flow - void effect was shown in 3 cases of the traditional flexion position and 5 cases of the optimized - flex position. Conclusion： The optimized - flex position is better than the traditional position in evaluating HD by MR scan.