Research on comparison of exposure with electrocardiographic gated mA modulation (ECG) and ECG＆CAREDose 4D mode in coronary multi-slice spiral CT angiography

VernacularTitle:基于体模试验对比研究不同模式下多层螺旋CT冠状动脉成像照射剂量
Author: Bin LIU ; Senlin GUO ; Lan WEI ; Xiaolu FEI ; Mei BAI
Publication Type:Journal Article
Keywords: Tomography,X-ray computed; Coronary vessels; Radiation dosage
From: Chinese Journal of Radiology 2009;43(4):394-396
CountryChina
Language:Chinese
Abstract: Objective The objective of this article was to compare patients' dose with electrocardiographic gated mA modulation (ECG) and ECG＆CAREDose 4D mode during coronary MSCT angiography.Methods The research was based on phantom experiment and computer simulation to get the mean value of peak skin dose data and effective dose data respectively and to analyze deterministic and stochastic radiation risk.Results The peak skin dose using ECG mode alone and using ECG＆CAREDose 4D mode with the same image noise level was (87.4±0.9) and (45.9 ± 1.2) mGy respectively.Effective dose was 17 and 10 mSy for ECG mode and ECG＆CAREDose 4D mode respectively.Comparing with ECG mode alone, ECG＆CAREDose 4D mode reduced organ dose of gonad, red marrow, lung, stomach, breast and thyroid by 40.0%, 36.7%, 39.3%, 37.7%, 38.8% and 38.9%, respectively. Conclusion Results showed that ECG ＆ CAREDose 4D mode can reduce radiation dose effectively comparing using ECG mode alone, and that ECG ＆ CAREDose 4D mode should be widely applied ehnically with appropriate initial settings.