双源Flash CT前瞻性心电门控序列扫描窄R-R间期曝光显示冠状动脉的可行性研究
发布时间:2018-04-27 03:37
本文选题:辐射剂量 + 冠心病 ; 参考:《医学影像学杂志》2013年02期
【摘要】:目的比较双源Flash CT前瞻性心电门控(简称前门控)序列扫描实验组(窄R-R间期)与对照组(宽R-R间期)的诊断准确率、图像质量及辐射剂量。方法每组各纳入100例患者,采用前门控序列扫描,管电压120kV,管电流通过care dose4D自动调节。实验组:当心率≤75次/min时,65%~75%R-R间期曝光;心率75次/min时,35%~45%R-R间期曝光。对照组:35%~70%R-R间期曝光。由2名放射科医师采用双盲法对两组患者的图像质量进行主观评分,结果不一致时由1名高年资医师裁定。记录所有患者的剂量长度乘积(DLP),计算出有效辐射剂量(ED)。实验组有53例、对照组有51例患者行冠状动脉造影(CAG)。结果实验组与对照组的诊断准确率和图像质量主观评分差异无统计学意义(P0.05)。实验组有效辐射剂量(3.01±0.45)mSv,对照组有效辐射剂量(6.91±0.38)mSv,差异有统计学意义(P0.05)。结论双源Flash CT前门控序列扫描窄R-R间期曝光在保证诊断准确率及图像质量的前提下可明显降低辐射剂量,是冠心病患者的一种安全可靠的检查方法。
[Abstract]:Objective to compare the diagnostic accuracy, image quality and radiation dose between the experimental group (narrow R-R interval) and the control group (wide R-R interval) by dual source Flash CT prospective ECG gating. Methods one hundred patients in each group were scanned by the front door control sequence. The voltage of the tube was 120kV, and the current of the tube was automatically adjusted by care dose4D. The experimental group: when the heart rate 鈮,
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