The values of MSCT multi-planar reconstruction in the diagnosis of lumbar spondylolysis

Objective To study the reasonable schedule and diagnostic values of MSCT multi-planar reconstruction in patients with lumbar spondylolysis. Methods Volume scan ranging from T12 to S1 was done in 540 cases suffered from backleg pain without definite trauma. The lumbar disc axial and whole lumbar axial,sagital,coronal images were reconstructed from raw data of MSCT. Results Of the 540 cases,54 spondylolysis in isthmus of lumbar pedicle were demonstrated in 29 ones (29/540,5.37%). 20 cases were accompanied with spondylolisthesis. The sagital multi-planar reconstruction was the best way to reveal the fissures of spondylolysis and accompanying abnormalities. The detectable ratio of fissures in lumbar disc with axial,whole lumbar axial,sagital and coronal multi-planer reconstruction images were 7.41%,100%,100% and 51.85% respectively. Conclusions MSCT sagital multi-planar reconstruction is the best images to reveal the fissures of spondylolysis. It should be taken as routine item in MSCT examination for the patients with lower back pain.