比率法判定颈椎管狭窄的应用价值

作者对经临床确诊为颈椎管狭窄的２００例影像学资料，包括Ｘ线平片和ＣＴ扫描片各１００份，测量Ｃ＿（４－５）椎管与椎体的矢状径与横径。将椎管矢状径为１１ｍｍ及其以下者（绝对值法）和椎管下矢径／椎体中矢径之比率值为０．７１及其以下者（比率法），暂作为颈椎管狭窄的判定标准。分析并比较两种方法对颈椎管狭窄的检出率。结果提示，比率法平片组与ＣＴ组均明显优于绝对值法。运用比率法诊断颈椎管狭窄，Ｘ线平片与ＣＴ扫描同样有效。

Application of Ratio Method in Determinating Cervical Spinal Stenosis

Radiographys and CT films of 200 cases identified clinically as cervical spinal stenosis were used for measurement of the sagittal and the transverse diameter of spinal canal and vertebral body in C4-5 Images of he patients whose sagittal diameters of cervical spinal canal were 11 mm or less(absolute value method)and he values of the canal inferior sagittal diameter divided by the corresponding body median diameter were 0.71 or less(ratio value method)were considered as cervical spinal stenosis.We analysed and compared the diagnistic efficiency of the two methods for the spinal stenosis of myelopathy type.Results indicated that the ratio method in either radiography group or CT film group was significantly superior to the absolute value method in demonstrating cervical spinal stenosis.With ratio value method,radiography has the same efficiency as CT scanning in the assessment of the spinal stenosis.