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首页> 外文期刊>Journal of the American College of Cardiology >Radiation dose reduction and coronary assessability of prospective electrocardiogram-gated computed tomography coronary angiography: comparison with retrospective electrocardiogram-gated helical scan.
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Radiation dose reduction and coronary assessability of prospective electrocardiogram-gated computed tomography coronary angiography: comparison with retrospective electrocardiogram-gated helical scan.

机译:前瞻性心电门控计算机断层扫描冠状动脉造影的辐射剂量降低和冠脉可评估性:与回顾性心电图门控螺旋扫描的比较。

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OBJECTIVES: The aim of this study was to evaluate radiation dose and coronary assessability of a prospective electrocardiogram (ECG)-gated scan by 64-slice multidetector (row) computed tomography (MDCT)-coronary angiography (CA) compared with a retrospective ECG-gated helical scan. BACKGROUND: The 64-slice MDCT-CA has been widely used; however, a high radiation dose by 64-slice MDCT-CA has been reported. Prospective ECG-gated scan using "step-and-shoot" protocol can reduce radiation exposure effectively. METHODS: MDCT-CA was performed in 229 consecutive patients. Fifty-six patients were excluded because of higher heart rates of >65 beats/min; of patients with heart rates
机译:目的:本研究的目的是评估64层多排(行)计算机断层扫描(MDCT)-冠状动脉造影(CA)与回顾性ECG-CT相比,前瞻性心电图(ECG)门控扫描的辐射剂量和冠状动脉可评估性。门控螺旋扫描。背景技术:64层MDCT-CA已被广泛使用。然而,已经报道了64层MDCT-CA的高辐射剂量。使用“逐步摄影”协议的前瞻性ECG门控扫描可以有效减少辐射暴露。方法:连续229例患者进行了MDCT-CA。由于较高的心率> 65次/分钟,排除了56名患者。在心率≤65次/分钟的患者中,有97位患者通过采用螺旋管电流调制的螺旋扫描进行了分析,有76位患者通过前瞻性门控进行了分析。与选择性CA作为金标准相比,研究了冠状动脉的可评估性和诊断准确性。在两种方案中都评估了辐射剂量。结果:螺旋扫描的冠状动脉可评估性为95.5%(1,364个区段中的1,303个),而前瞻性门控的冠状动脉可评估性为96.6%(1,089个区段中的1,053个),显示相似的冠状动脉可评估性(p = 0.14)。通过螺旋扫描,在可评估的部分中,对冠状​​动脉阻塞性和闭塞性病变的敏感性和特异性分别为97.0%(167个中的162个)和97.6%(1136个中的1,109个),而前瞻性门控的敏感性和特异性为96.4%(84个中的81个,p = 0.84)和98.5%(969中的955,p = 0.12)。螺旋扫描和前瞻性门控的有效剂量分别为21.1 +/- 6.7 mSv和4.3 +/- 1.3 mSv(p <0.0001),表明与螺旋扫描相比,前瞻性门控将放射剂量降低了79%。结论:前瞻性门控的MDCT-CA与具有回顾性心电图门控螺旋扫描的管电流调制相比,具有同等的冠状动脉可评估性和诊断准确性,且辐射剂量降低。

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