不同心率水平256层CT前瞻性心电门控冠状动脉成像质量评价

Image quality assess for patients with different heart rate by 256-silce computed tomography coronary angiography with prospective ECG-gating

目的:比较不同心率水平256层CT前瞻性心电门控冠状动脉成像的图像质量。方法:对临床拟诊冠心病的200例患者行256层CT前瞻性心电门控冠状动脉成像,根据心率分为两组:第1组,50次/min≤心率<70次/min(n=99);第2组,70次/min≤心率<90次/min(n=111)。用双盲法评价两组的图像质量。结果:第1组患者可评估的冠状动脉节段为1 410个(94.95%),其中1 123个(79.65%)节段图像质量优秀,253个(17.94%)节段图像质量为良,34个(2.41%)节段图像质量为差;第2组可评估的冠状动脉节段为1 571个(94.35%),其中1 208个(76.89%)节段图像质量优秀,309个(19.67%)节段图像质量为良,54个(3.44%)节段图像质量为差,两组之间差异均无统计学意义(P>0.05)。结论:心率在90次/min以下的患者能进行256层CT前瞻性心电门控冠状动脉成像,图像质量能满足诊断要求。

Objective：To compare image quality of patients with different heart rate（HR）by 256-silce computed tomography coro-nary angiography（CTCA）using prospective electrocardiogram（ECG）-gating.Methods：Two hundred patients with suspected coronary artery disease underwent 256-slice CTCA using prospective ECG-gating.Patients were divided into two groups according to their HR：the first group（50 b.p.m≤HR 〈 70 b.p.m,n = 99）and the second group（70 b.p.m≤HR 〈 90 b.p.m,n = 111）.Image quality was e-valuated between those two groups.Results：Total 1410（94.95%）segments of the first group were evaluated,among which 1 123（79.65%）segments were classified as excellent,253（17.94%）were good and 34（2.48%）were bad.Total 1 571（94.35%）segments of the second group could be evaluated,1 208（76.89%）segments were classified as excellent,309（19.67%）were good and 54（3.44%）were bad.Conclusion：The patients with HR 〈 90 b.p.m can undergo CTCA using prospective ECG-gating.Image quality can satisfy the diagnostic requirement.