Methods: 52 patients were studied with multi-slice spiral CT(retrospectively ECG-gating; 0.5s rotation; cardiac segment or burst reconstruction algorithm; intravenous contrast agent).

• [方法]对52例病人进行多层螺旋CT冠状动脉成像检查，采用回顾性心电门控和心脏分段数据采集或多扇区数据采集方式，选择0.；5秒螺旋扫描。