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目的探讨重建相位对64排螺旋CT冠状动脉造影图像质量的影响。方法对56例拟诊冠心病患者行64排螺旋CT扫描后,使用Philips独立工作站提供的冠状动脉分析软件,进行冠状动脉重建。重建的方法包括容积再现、多平面重组、最大密度投影和曲面重组等。分析不同R-R时相各支冠状动脉的显示情况。结果右冠状动脉近段、远段及左前降支、左回旋支近段的最佳重建时相是70%～75%,右冠状动脉中段、后降支及左回旋支远段重建的最佳时相为70%～75%或35%～40%。结论选择回顾性心电门控最佳R-R时相重建冠状动脉可最大限度减轻心脏运动伪影,提高图像质量。
Objective To investigate the effect of reconstruction phase on the quality of 64-slice spiral CT coronary angiography. Methods Sixty-six patients diagnosed with coronary heart disease underwent 64-slice spiral CT scan, and the coronary artery was reconstructed using the coronary analysis software provided by Philips independent workstation. Reconstruction methods include volume reproduction, multi-plane reorganization, the maximum density projection and surface reorganization. Analysis of different R-R phase of the coronary arteries showed. Results The optimal reconstructive phase of proximal segment, distal segment, left anterior descending branch and left circumflex artery segment of the right coronary artery was 70% -75%. The reconstruction of middle right coronary artery, descending branch and left circumflex artery was the best The time is 70% ~ 75% or 35% ~ 40%. Conclusions The retrospective ECG-gated optimal R-R phase reconstruction of the coronary arteries can minimize heart motion artifacts and improve image quality.