Automated hape analysis model in axially loading during CT examination of the lumbar spine

Objective To establish an automated shape analysis model in axially loading during CT examination of the lum- bar spine,and explore its clinical value in diagnosis of patients with degenerative disorders of the lumbar spine.Methods Patients with degenerative disorders were observed during CT in psoas-relaxed position(PRP)and axially compressed supine position(ACE)of the lumbar spine.The number of the maximum transverse diameter,length,width diameter of vertebral canal and dural sac cross-sectional area in membranous sac of center layer for L_2-S_1 disci intervertebrales were compared and statistically analyzed between loading and unloading phrase based on the automatic shape analysis model.Results ACE showed smaller transverse diameter,length,width diameter of vertebral canal and dural sac cross-sectional areas in membra- nous sac of center layer than PRP.Conclusion Automated shape analysis model is of important assisted value in the diagno- sis of degenerative disorders of the lumbar spine.More radiological diagnostic information of spinal stenosis can be obtained with ACE than with PRP CT examination.