【摘要】 目的研究64层CT不同角度MPR图像诊断腰椎弓峡部裂的价值。方法利用64层CT扫描的50例腰椎弓峡部裂病例的各向同性扫描的容积数据,采用不同角度的多平面重组(MPR)方式进行图像后处理。利用MPR模拟出4种扫描模式(1)常规的椎间盘扫描方式的断面图像;(2)腰椎横断面图像;(3)沿椎弓方向的斜横断位(椎弓反角度扫描)图像;(4)沿腰椎长轴的矢状断面图像。分析4种方法的峡部裂隙检出率、峡部裂断端错位检出率、碎骨片检出率、假关节形成检出率。结果峡部裂隙检出率以矢状MPR图像、斜横断MPR(100%)最高(u=8.51,P<0.05);峡部裂断端错位检出率以矢状MPR图像(90%)最高(u=4.18,P<0.05);碎骨片检出率以斜横断MPR(28%)和矢状MPR图像(20%)最高(u=2.08,P<0.05);假关节形成检出率以斜横断MPR(18%)最高(u=2.237,P<0.05)。结论64层CT后处理图像的多平面重组(MPR)可以从不同角度、不同平面分析椎弓峡部裂的各种征象。更多还原

【Abstract】 Objective To study the value of different angle MPR using 64-slice CT in diagnosing spondylolysis.Methods The volume data of isotropic scanning in 50 cases of spondylolysis using 64-slice CT were post-processed by different angle MPR. Four scanning modes were imitated: conventional intervertebral disc scanning mode, transverse scanning, oblique transverse scanning along the direction of vertebral arch, longitudinal and sagittal images of lumbar vertebrae. The detective rate of isthmus fissue, dislocation of disruption end, bone frature piece, false joint of above four methods were analysed. Results The sensitivity of detecting the isthmus fissue was highest by sagittal MPR and oblique transverse MPR images (100%)(u=8.51,P<0.05); The sensitivity of detecting disruption end dislocation was highest by sagittal MPR images(90%)(u=4.18,P<0.05); The detective rate of frature piece was highest by oblique transverse MPR images (28%) and by sagittal MPR(20%)(u=2.08, P<0.05); The detective rate of false joint was highest by oblique transverse MPR images (18%)(u=2.237, P<0.05).Conclusion MPR images of 64-slice CT can show the features of spondylolysis at different angles and planes.更多还原