100 kV前门控CT冠脉造影图像质量与辐射剂量的分析
邢桂荣;刘挨师
【期刊名称】《内蒙古医学院学报》 【年(卷),期】2014(000)002
【摘要】Objective:To evaluate image quality and radiation dose for coronary artery computed tomographic angiography( CTA) obtained with low tube voltage for a prospectively gated axial( PGA) CT technique in low body mass index. Methods:Eighty patients enrolled in this study. The group A was 40 patients with low BMI, HR and HRv using PGA scan technique ( tube voltage was 120kV and tube current was 400mA). Image acquisition was performed at 75%of the R-R interval. The percentage of assessable coronary artery segments and radiation dose were used to evaluate diagnostic value. Results:527 coronary artery segments were depicted and evaluated. The percentage of assessable coronary artery segments was 99. 05%. The mean DLP and effective dose were(91. 41±13. 36)mGy·cm,1. 58±0. 23 mSv,respectively. Conclusion:Low tube voltage for PGA CT technique could offer assessable image quality and substantially reduced effective radiation dose at low HR and HRv.%目的：评价前门控模式下低体质量指数人群降低管电压的图像质量与辐射剂量。方法：本研究入选行CTCA检查的病人40例,其中心率( heart rate,HR)<65 bpm、心率变异( heart rate variability,HRv)<5 bpm、体质量指数( body mass index,BMI)≤24 kg/m2,
100 kV前门控CT冠脉造影图像质量与辐射剂量的分析
