In group D, the optimal reconstructive window would be narrow ,the optimal phase of both RCA and LCX were at 50%,There was no significant difference in the score of LAD from 40% to 90%.

• D组最佳重建窗较窄,RCA、LCX最佳重建时相均在50%25,LAD在40%25-90%25R-R时相得分差异不明显。