作者对81例可疑急性主动脉夹层(AAD)的病人行高速CT检查。在快速静脉团注对比剂期间不进床,在1s间隔内连续采集12层图像,在所选择病例行100ms间隔的原始数据重建,并通过电影显示观察。病人开始时使用10mm层厚,在15～20mm间距内从主动脉弓上到主动脉瓣下平扫。紧接着在每次快速静脉注射33ml对比剂的同时进行三次单层扫描,每秒可得到12幅连续的动态图像。如果最初的单 The authors performed a high-speed CT scan on 81 patients with suspected acute aortic dissection (AAD). During rapid intravenous bolus injection of contrast agent, 12 consecutive images were taken at 1 second intervals and the original data at 100 ms intervals were reconstructed in the selected cases and observed by cinematography. The patient started with 10 mm layer thickness, aortic arch to aortic flatwise within 15-20 mm. This was followed by three single-layer scans each time a bolus of 33 ml of contrast agent was administered, yielding 12 consecutive dynamic images per second. If the original single