Evaluation of organ-absorbed dose in ECG-gated coronary CTA

证实了心电门控冠状动脉CTA中胸部器官吸收的辐射剂量随采集技术和心率的不同而不同。在接受心电门控冠状动脉CTA的患者中，心电门控高音双螺旋模式、步射模式和低音螺旋模式患者肺癌的终生归因危险度分别为0.006%、0.034%和0.073%。应适当选择每种采集模式，在应用心电门控高音双螺旋模式时，要仔细考虑图像质量恶化的风险。

It was confirmed that radiation doses absorbed by thoracic organs during ECG-gated coronary CTA were different according to the acquisition technique and heart rate. The estimated lifetime attributable risks of lung cancer incidence in patients who underwent ECG-gated coronary CTA were 0.006% with the ECG-gated high-pitch dual-spiral mode, 0.034% with the ECG-gated step-and-shoot mode, and 0.073% with the ECG-gated low-pitch spiral mode, respectively. Each acquisition mode should be selected appropriately, and it is necessary to carefully consider the risk for deterioration of image quality when the ECG-gated high-pitch dual-spiral mode is applied.