【摘要】 目的:探讨64-MDCT冠状动脉成像质量的影响因素,以提高冠状动脉成像的质量。方法:对临床拟诊为冠状动脉疾患的483例注射对比剂前心律整齐的患者行64排螺旋CT心电门控扫描,并对影响成像质量的常见因素(心率、呼吸、重建时相的选择和VRT、MIP、CPR等图像后处理技术等)进行分析。结果:483例患者中,冠状动脉显示优良者右冠状动脉(RCA)占91.3%,左前降支(LAD)占90.7%,左旋支(LCX)占88.6%。15例因注射对比剂后出现严重心律失常或心动过速致冠状动脉显示极差不能满足诊断。结论:64排螺旋CT对心律整齐,注射对比剂后心率≤70次/分的患者,注意克服各种成像质量因素的影响,一般可以获得较高质量的图像,是无创性筛查冠心病的有效方法,具有较重要的临床意义。更多还原

【Abstract】 Objective:To analyze the factors that affect the quality of 64 multi-detector CT angiography of coronary artery in order to improve the technique.Methods: Gated electrocardiograph (ECG) scanning with 64 multi-detector CT were performed on a totally of 483 patients who were diagnosed or suspected as coronary artery diseases (CAD) and had no arrhythmia before injection of contrast agents. Common factors which may affect the image quality including heart rate,phases of reconstruction and reconstructive techniques were analyzed. Results: Among coronary artery images with good quality,91.3% were right coronary artery (RCA),90.7% were left anterior descending artery (LAD),and 88.6% were left circumflex artery (LCX).Images of 15 cases were too poor to be used for diagnosis due to severe arrhythmia or tachycardia after contrast agent injection. Conclusion: 64 multi-detector CT coronary angiography is an effective and noninvasive technique to check coronary artery diseases for patients who have no arrhythmia and can keep a heart rate of ≤70 times/min after injection of contrast agents.更多还原