4层螺旋CT血管成像显示Adamkiewicz动脉和脊髓前动脉临床研究  

Clinical Study with 4-slice Helical CT Angiography in Showing Adamkiewicz Artery and Anterior Spinal Artery

作　　者：汤敏[1] 曾蒙苏[1] 吴东[1] 张兴伟[1] 陈刚[1] 陈锦[1] 缪熙音[1] 陈文芳[1] 陆怡[1] 陆海峰[1] 陆秀良[1] 

机构地区：[1]复旦大学附属中山医院放射科上海市影像医学研究所,上海200032

出　　处：《临床放射学杂志》2005年第1期12-16,共5页Journal of Clinical Radiology

摘　　要：目的　评价 4层螺旋CT血管成像 (CTA)显示Adamkiewicz动脉 (ADA)和脊髓前动脉 (ASA)的能力。资料与方法　采用 4层螺旋CT对 5 4例无动脉系统疾病的受检者进行增强扫描检查 ,扫描参数 :0 .5s/r,有效层厚1.3mm ,重建间隔 0 .6mm ,对比剂总量 10 0ml,流率 3ml/s ,扫描延迟时间的设定是机器自备自动追踪技术 ,于降主动脉强化最佳时开始预设定扫描程序。在横断面的基础上行多平面重建 (MPR)、曲面重建 (CPR)和电影模式 (Cine)重建 ,由 2位有经验的放射科医师分别阅片 ,经讨论最后达成一致看法 ,明确ADA及ASA显示及其定位。结果　 4 8例 (48/5 4 ,88.9% )至少有单支ADA可以清晰地显示 ,其行径从胸腹主动脉发出 ,经椎间孔到脊髓与ASA接合成“发夹状”。 11例 (11/5 4 ,2 0 .4 % )可以显示有 2支ADA ,故 4 8例共显示 5 9支ADA ,其中 4 2支ADA(71.2 % )起源于左侧肋间动脉。 5 5支ADA(93.2 % )起源于T8～L1之间主动脉。共有 15例 (31.3% )在CINE或CPR中追踪到ADA和ASA全程连续显影。结论　 4层螺旋CT显示ADA和ASA有很高的成功率。Objective To assess the ability of the visualization of the ADA and the ASA by using 4-slice helical CT angiography (CTA).Materials and Methods Fifty four patients without vascular diseases were underwent postcontrast CT scan. Scans were obtained with the following parameters: 0.5s/r, 3mm slice thickness, 0.6mm reconstruction space,total of contrast media 100ml, at a rate of 3ml/s, the scan delay was set by means of an automatic triggering system, CT started force setting scan protocol when the optimal opacification of the descending artery was detected. Multiplanar, curved planar reformation and cine mode displays were conducted on the basis of axial image. A general evaluation of the image quality was conducted by two experienced radiologists respectively. A final decision was arrived at through discussion on the visualization and location of ADA, ASA.Results At least a single artery of Adamkiewicz was clearly visualized from thoracoabdominal aortic artery, via the intervertebral foramen to the “hairpin-shaped” union with the anterior spinal artery in In 48 (48/54,88.9%). Two arteries of Adamkiewicz were identified in 11 (11/54,20.4%) of these patients,so total 59 ADA arterys were visualized in 48 cases. Forty two arteries of Adamkiewicz (71.2%) originated from the left side. Fifty five (93%) originated between T 8 and L 1. Continuity of the entire length was traceable on cine mode displays or on curved planar reformation images in 15 (31.3%) patients.Conclusion 4-slice helical CT could depict ADA and ASA with great successful rate.

关 键 词：ADA 螺旋CT 血管成像 脊髓前动脉 CPR 临床研究 多平面重建 显示 机器 设定 

分 类 号：R816.2[医药卫生—放射医学]