Purpose To provide the anatomic basis of imaging for the segmental vessels of the thoracolumbar spine side and measure the distance between two adjacent segmental arteries in the three-dimensional images. Materials and Methods After conducting angiography for 30cases of normal adults through the ulnar vein, carring out thoracolumbar CT scans. In the image observation: The course and adjacent relationship of the segmental vessels. Measuring range: the distance between the the upper and lower segmental arteries of the middle line of spine side. Results We could observe the course and the adjacent relationship of thoracolumbar spine lateral vascular. That between the upper and lower segmental vessels consists a relatively non-vascular nerve safe zone where the intervertebral space locates. And we surveyed the related datas. Conclusion Three-dimensional reconstruction of CT images can effectively observe the course and adjacent relationship of the thoracolumbar spinal lateral segmental artery, and can accurately measure the safe zone.%目的:为脊柱胸腰结合段侧面的节段血管走行、'变异及毗邻关系提供影像学解剖基础.资料和方法:对32例正常成人经肘静脉造影后行脊柱胸腰段CT扫描,在图像上观察节段动脉的走行特点并在脊柱侧面正中线上对上、下位节段动脉之间的距离进行测量.结果:在影像三维图像上可观察脊柱胸腰段侧面,节段动脉较为恒定地存在并走行于相应椎体侧面中央浅沟内.上、下位节段动脉间构成了一个相对无血管、神经的安全区,椎间隙恰好位于该安全区中部.并且测量了相关数据,左右两侧比较无显著性差异(P>0.05).结论:CT三维重建图像能有效观察脊柱胸腰结合段侧面节段动脉的走行及毗邻关系,并能准确测量出安全区.
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