电子束CT冠状动脉成像质量分析

Quality analysis of EBCT angiography of coronary artery

目的探讨影响电子束CT冠状动脉成像质量的因素。方法66例患者行电子束CT冠状动脉造影检查,并进行“容积再现”（VR）图像重建,比较冠状动脉的主要分支在不同相位的影像质量。结果14例因图像质量差不能用于冠状动脉评价,呼吸伪影为其主要影响因素。52例可评价的图像中,右冠状动脉（RCA）、左冠状动脉主干（LM）、左冠状动脉前降支（LAD）、左冠状动脉旋支（LCX）最佳显示相位分别为32%-54%、32%-62%、32%-62%、32%-38%。结论呼吸伪影是影响冠状动脉成像质量的最主要因素;冠状动脉成像质量与相位有关,多相位成像可提高冠状动脉成像质量。

Objective To explore the factors affecting the quality of electron beam computed tomography angiography （EBA） of coronary artery. Methods Sixty-six cases received EBA of coronary artery, and then the images were reconstructed using volume rendering （VR）. The quality of reconstructed images of main branches of coronary artery in different phases was compared. Results Fourteen cases failed to evaluate because of poor image quality, in which breath artifact was the main cause. Of the other 52 cases, the best displaying phases of right coronary artery （RCA）, left main coronary artery （LMA）, left anterial desending artery （LAD）, and left circumflex coronary artery （LCX） were between 32%-54%, 32%-62%, 32%-62%, 32%- 38%, respectively. Conclusion Breath artifact is the main affecting factor for image quality, and multi-phase imaging can improve the image quality of EBA of coronary artery.