RÉSUMÉ
Objective To evaluate the clinical application of multi-slice spiral CT(MSCT) and X-ray plain film in congenital scoliosis.Methods 40 cases with congenital scoliosis were undergone MSCT scan,the imaging data were reconstructed with maximum intensity projection(MIP),multiple planar reconstruction(MPR),surface shaded display(SSD) and surface volume rendering(SVR),the applied value of these various reconstructed images were analysed comparatively with X-ray plain film.Results Based on the preoperative X-ray plain films,the spinal formation failure,segmentation failure and mixed failure of spine were found in 18,15 and 7 cases respecitvely.However MSCT scan showed that 13 cases had formation failure,12 cases had segmentation failure and 15 cases were mixed failure of spine,and in combination with spinal bifida in 6,rib deformity in 8 and bony ridge inside vertebral canal in 4.The relative features of congenital scoliosis could be comprehensively evaluated by SVR images.Conclusion The reformatted images of MSCT is remarkedly superior to conventional X-ray images in judging the classification and area of spinal deformity accurately.