屈伸位颈椎MR扫描对颈椎管狭窄程度的研究

目的：研究颈椎管狭窄者在颈椎屈伸位下椎管狭窄程度的变化。方法：30例颈椎管狭窄，男13例，女17例；年龄28～66岁，平均39岁。颈椎椎管矢状径10mm以下即绝对狭窄者12例，颈椎椎管矢状径10～12mm即相对狭窄者18例．均行中立、前屈、后伸位MR扫描，获取MR图像后评价颈椎管的狭窄程度和颈髓受压情况的变化，结果：颈椎管狭窄者在后伸位上出现颈椎管狭窄加重19例，较前屈位8例明显多（P〈0．05）。结论：对于颈椎管狭窄的影像学诊断，屈伸位颈椎MR扫描可较好地补充常规中立位MR检查，而且后伸位MR较中立位和前屈位更具敏感性

Study the degree of cervical spinal canal stenosis by MRI in flexion and extension of the cervical vertebrae

Objective: To study the degree and changes of cervical spinal canal stenosis by MRI scans in flexion and extension of the cervical vertebrae. Methods: Thirty cases of cervical stenosis included 13 male and 17 female with an average age of 39 years ranging from 28 to 66 years. The sagittal diameter of cervical spinal canal were below 10 mm(absolute stenosis) in 12 cases,within 10 to 12 mm(correspondence stenosis) in 18 cases. MRI scans in neutrality,flexion,extension performanced and the degree of cervical spinal canal stenosis and the changes of spinal cord compression were evaluated after MRI scans obtained. Results: Nineteen patients of extension occurrenced stenosis more serious,8 patients of flexion occurrenced(P<0.05). Conclusion: For the cervical stenosis imaging diagnostic,flexion and extension of cervical MRI scan can be used to supplement conventional MRI examination neutral position,and the extension of MRI is more sensitivity than neutral position and flexion bit.