摘要
目的：回顾性分析腰椎峡部裂的ＣＴ表现并讨论其诊断与鉴别诊断。材料与方法：２３例患者先行腰椎侧位扫描定位图像，采用与椎间盘平行的角度，自病变脊椎的上一椎体下缘边续扫描至下一椎体上缘，层厚４或５ｍｍ，必要时在峡部行２ｍｍ层厚扫描。结果：２３例中，累及双侧者２１例，单侧２例；发生在Ｌ５者１６例，Ｌ４者７例。ＣＴ表现为同一脊椎关节空间的低密度裂隙，出现在椎弓根下缘平面，走行不规则，裂隙可宽可窄，表面不光滑，呈锯齿状。伴脊柱滑脱１９例、椎管变形１９例、椎小关节增生１７例、侧隐窝狭窄６例、黄韧带肥厚１５例、相邻椎间盘退变１０例、椎弓裂４例和椎弓发育不良１例。结论：ＣＴ不仅是显示腰椎峡部裂的首选方法，也是了解并发症的良好方法。
To evaluate the CT findings of the isthmic defect in the lumbar spine and to discuss the diagnosis as well as differential diagnosis of this abnormality.Materials and Methods:Twenty-three patients were scanned with axial CT using 4～5mm slice thickness parallel to the intervertebral space. The scan region was from the inferior surface of the vertebral body above the pathological site to the superior surface of the vertebral body below the pathological site. 2mm slice thickness of axial scans were also performed if necessary. Results:The CT scans revealed an irregular band of lower density which represented the isthmic defect located between the ipsilateral articular processes at the level of inferior margin of the pedicle. In 21 cases the defect was bilateral.while in 2 cases it was unilateral.The isthmic defects were found at L5 in l6 cases and at L4 in 7.The combined findings included spondylolisthesis(19),deformity of the spinal canal(19),hypertrophy of the intervertebral joints(17),stenosis of the lateral recess(6),thickening ofthe ligamentum flavum(15),degeneration of adjacent disk(10),spondyloschisis(4),dysplasia of vertebral arch(1)respectively. Conclusion:CT should be considered as the primary choice not only for demonstration of the isthmic defect in the lumbar spine but also for the evaluation of its complicated conditions.
出处
《放射学实践》
北大核心
1996年第2期55-58,共4页
Radiologic Practice
