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。
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。
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。
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