某社区中青年人椎管形态学MRI观察

MRI Observation of Spinal Canal Morphology in Young and Middle-aged People in Changqing Road Community

目的 探讨长青路社区中青年人MRI C3～C7椎体矢状径、椎管矢状径、颈髓矢状径、Torg比值及SAC大小变化。方法 50例长青路社区健康中青年人分为男女两组,男21人,女29人,均行颈椎MRI检查。矢状位T2WI测量C3～C7节段椎体矢状、椎管及脊髓矢状径,计算相应节段Torg比值和脊髓缓冲空间（SAC）。结果 男性组C3～C7椎体矢状径大于女性椎体矢状径,差异有统计学意义（P〈0.05）。C3～C7椎管矢状径、脊髓矢状径男女两组比较差异无统计学意义（P〉0.05）。C3～C7节段Torg比值范围男性0.62～1.19,女性0.82～1.34,女性Torg比值大于男性,差异有统计学意义（P〈0.01）。C3～C7SAC值男女两组差异无统计学意义（P〉0.05）。受试者Torg比值与椎体矢状径、脊髓矢状径的皮尔逊相关系数为-0.676、0.153。SAC值与椎体矢状径、脊髓矢状径、椎管矢状径的皮尔逊相关系数为0.241、-0.324、0.869。结论 C3～C7椎体矢状径存在性别差异,椎管矢状径无性别差异,单纯以Torg比值作为椎管狭窄的诊断指标会加大男性椎管狭窄的误诊率。与Torg比值相比,SAC值的变化与椎管矢状径大小明显相关,较Torg比值更能反映椎管狭窄情况。

Objective To study the changes of C3 to C7 vertebral sagittal diameter, canal sagittal di- ameter, spinal cord sagittal diameter, Torg ratio and SAC of the young and middle-aged people in Chan- gqing Road community. Methods Fifty young and middle-aged volunteers from Changqing Road commu- nity were divided into two groups of men （21） and women （29）. Everyone underwent cervical spine MRI. We measured their vertebral sagittal diameter, eter and calculated the corresponding segmental Torg canal sagittal diameter and spinal cord sagittal diam- ratio and SAC on the sagittal T2WI. Results Verte- bral sagittal diameter from C3 to C7 in men was significantly larger than that in women （P〈0.05）. Canal sagittal diameter and spinal cord sagittal diameter had no difference between two groups. The Torg ratio in men ranged from 0. 62 to 1.19, and 0. 82 to 1.34 in women. The Torg ratio in women was significantly larger than that in men （P〈0.01）. SAC from C3 to C7 was of no statistical significance between two groups. All volunteers＇ Pearson correlation coefficients in Torg ratio and vertebral sagittal diameter, and spinal cord sagittal diameter were 0. 676 and 0. 153, respectively. Pearson correlation coefficients in SAC and spinal cord, vertebral sagittal diameter, and canal sagittal diameter were 0. 241, 0. 324 and 0. 241, respectively. Conclusion Vertebral sagittal diameters from C3 to C7 were different according to gender, and canal sagittal diameters were of no difference between two groups. The misdiagnosis rate of canal ste- nosis in men would be increased only by Torg ratio. Compared with Torg, SAC changes were significantly correlated with the size of the canal sagittal diameter, and so the SAC could reflect stenosis more exactly.