The Value of the Volumetric CT Scanning in the Diagnosis of Lumbar Spondylolysis

Objective To discuss the va]ue of volumetric scanning with 64 row multi — slice CT(MSCT) in the diagnosis of lumbar spondylolysis(LS).Methods twenty-eight patients who were clinically suspected of having LS underwent volumetric scanning with MSCT,then various post — processing techniques including multi — planar reformation(MPR) in oblique saggital angle and volume rendering technique(VRT)were carried out at the workstation.Result Among 28 patients,bilateral and unilateral LS lesions were found in 24 cases(85.7%),4 cases(14.2%)respectively;Among all these cases,24 cases were at L5(85.7%);3 cases at L4(10.7%),1 case at L3(3.5%);2 cases at both L4、L5;(7.1%);Altogether 54 lesions in 28 patients.The typical fissure signs were found in all patients in axial scanning;The courser sign of vertebra small joint and arch and thebroken neck sign in oblique saggital angle scanning;which position is better to the demonstration of disruption end in isthmus、dislocation of disruption end and pseudoarthrosis.Conclusion The images in axial thin layer reconstruction and saggital oblique angle MPR by using MSCT play an important role in diagnosis of lumbar spondylolysis.