多层螺旋CT多平面容积重建诊断腰椎峡部裂的价值

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

目的探讨多层螺旋CT诊断腰椎峡部裂的检查合理方案及其价值。方法对连续540例无明确外伤史的腰腿痛患者行多层螺旋CT腰椎容积扫描,范围从胸12至骶1。所有病例均利用容积数据重建腰椎间盘横断位、全腰椎横断位、矢状位及冠状位图像。观察有无明确的椎弓峡部裂。结果540例中,5.37%(29/540)能明确显示共54处峡部裂。20例伴相应椎体滑脱。矢状位清晰、直观显示了所有裂隙的特征及伴随改变。全腰椎横断位亦显示了所有裂隙,但效果较矢状位差。冠状位、椎间盘横断位分别显示51.85%、7.41%的裂隙。结论多层螺旋CT全腰椎矢状位容积重建是显示腰椎峡部裂的最好方法,应将其列为腰腿痛患者腰椎多层螺旋CT检查的常规重建项目。

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.