论文部分内容阅读
目的:探讨计算机自动化测量下腰椎CT图像及其对腰椎管狭窄症的诊断价值。方法:应用Matlab自动测量程序对下腰椎CT图像进行自动分割和测量,完成对100例正常者和193例腰椎管狭窄症患者L4/5及L5/S1的椎管矢状径(APDC)、椎管面积(CAC)、硬膜囊面积(CAD)和硬膜外间隙(LAC)的测量,并进行统计学分析,利用正常组各项指标的95%下限值判断193例腰椎管狭窄症患者的狭窄节段,验证其诊断符合率。结果:腰椎管狭窄组L4/5及L5/S1两节段的APDC、CAC、CAD和LAC均显著小于正常组(P<0.01或0.001)。正常组L4/5的APDC、CAC、CAD和LAC的95%下限值分别为12.63mm、215.31mm~2、139.16mm~2和28.50mm~2,L5/S1分别为13.05mm、240.74mm~2、133.94mm~2和29.67mm~2。APDC、CAC、CAD和LAC对L4/5椎管狭窄的诊断符合率分别为63%、85%、82%和98%,对L5/S1分别为67%、86%、73%和96%。结论:计算机辅助下腰椎CT自动化测量精确、快速,可信度高,有助于腰椎管狭窄症的诊断。
Objective: To investigate the computerized automated measurement of lumbar spine CT images and its diagnostic value of lumbar spinal stenosis. Methods: Automated segmentation and measurement of CT images of lower lumbar spine were performed by using automatic measurement program of Matlab. The vertebral canal sagittal diameter (APDC) of L4 / 5 and L5 / S1 in 100 normal subjects and 193 patients with lumbar spinal stenosis were analyzed. (CAC), dural area (CAD) and epidural space (LAC) were measured and statistically analyzed. The 95% lower limit of each index of the normal group was used to determine the value of 193 patients with lumbar spinal stenosis Of the narrow segments, verify the diagnostic accuracy. Results: APD, CAC, CAD and LAC in L4 / 5 and L5 / S1 segments of lumbar spinal canal stenosis were significantly lower than those in normal group (P <0.01 or 0.001). The 95% lower limits of APDC, CAC, CAD and LAC of L4 / 5 in normal group were 12.63mm, 215.31mm ~ 2,139.16mm ~ 2 and 28.50mm ~ 2 respectively, L5 / S1 were 13.05mm and 240.74mm ~ 2,133.94 mm ~ 2 and 29.67 mm ~ 2. The coincidence rates of APDC, CAC, CAD and LAC on L4 / 5 spinal canal stenosis were 63%, 85%, 82% and 98%, respectively, and 67%, 86%, 73% and 96% for L5 / S1. Conclusion: The computer-aided measurement of lumbar spine CT is accurate, rapid and reliable, which is helpful for the diagnosis of lumbar spinal stenosis.