256层螺旋CT大范围心电门控扫描的冠状动脉成像质量评价

目的：探讨256层螺旋CT大范围心电门控扫描胸腹部血管联合成像对冠状动脉成像质量的评价.方法：对34例因胸痛就诊的患者用256层螺旋CT行大范围心电门控扫描检查,检查完成后,进行冠状动脉图像重建,并与常规CT冠脉扫描的图像进行比较.结果：行大范围心电门控扫描检查组的冠状动脉图像质量优良率为89.7％ （456/508）,能够满足诊断要求的为95.5％（485/508）,常规冠状动脉扫描组中,图像质量优良率为89.8％（460/512）,能够满足诊断要求的为96.3％ （489/512）.两组的图像优良率无明显差异（χ2=1.072,P=-0.192）.结论：256层螺旋CT大范围心电门控扫描能够满足冠状动脉成像的要求,具有较高的临床应用价值.

Evaluation of imaging quality for coronary angiography in extensiveness ECG-gated angiography using 256-slice CT

Objective： To evaluate imaging quality of the coronary arteries with wide range ECG-gated thoracic and ab- dominal angiography using 256 slices CT. Methods： Thirty-four patients with chest pain undertook wide rage ECG-gated scanning using 256 slices CT, and coronary arteries were reconstructed. The image quality and diagnosis were evaluated and compared with conventional coronary CT scanning. Results： All 508 segments in the group of wide range ECG-gated scanning were characterized, among which 89.7%（456/508） of the segments was of high-quality and 95.5%（485/508） of the segments could be evaluated. And 512 segments in the group of conventional scanning were characterized, among which 89.8%（460/512） of the segments was of high-quality and 96.3%（489/512） of the segments could be evaluated. There was no significant differ- ence in image quality between the two groups （χ2=1.072, P=0.192）. Conclusion： Imaging quality of the coronary arteries with wide range ECG-gated thoracic and abdominal angiography using 256 slices CT can meet the requirement in patients with ar- rhythmias, and has high value of clinical application.