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1·Objective To investigate the value of 64-slice spiral CT with bolus tracking in aortic angiography.

目的探讨团注追踪法64层螺旋CT增强扫描技术在主动脉成像中的应用价值。

2·In group one, the scanning delays were fixed, whereas in group two and three, scanning delays were determined individually by means of a semiautomatic bolus tracking device.

第一组以固定时间间隔扫描，第二组及第三组以团注造影剂跟踪技术启动扫描。