...
首页> 外文期刊>European radiology >Adequate image quality with reduced radiation dose in prospectively triggered coronary CTA compared with retrospective techniques.
【24h】

Adequate image quality with reduced radiation dose in prospectively triggered coronary CTA compared with retrospective techniques.

机译:与回顾性技术相比,前瞻性触发的冠状动脉CTA具有足够的图像质量且辐射剂量降低。

获取原文
获取原文并翻译 | 示例
           

摘要

The goal of our study was to compare a prospective triggering (PT) CT technique with retrospectively gated (RG) CT techniques in coronary computed tomographic angiograms (CCTA) with respect to image quality and radiation dose. Sixty consecutive patients were enrolled. CCTAs using the RG technique were obtained with a dual-source 64-slice CT system in 40 patients, using ECG-triggered tube current modulation, with either a broad pulsing window at 30-80% of the RR interval (group RGb, 20 patients, heart rate > 70 bpm) or a small pulsing window at 70% (group RGs, 20 patients, heart rate < 70 bpm). The other 20 patients underwent CCTA using the PT technique on a 128-slice CT system (group PT, heart rate < 70 bpm). All images were evaluated by two observers for quality on a three-point scale, with 1 being excellent and 3 being insufficient. The effective radiation dose was calculated for each patient. The average image quality score was 1.5 +/- 0.6 for PT, 1.35 +/- 0.5 for RGs and 1.65 +/- 0.5 for RGb. The mean effective dose for RGb was 9 +/- 4 mSv, for RGs 7 +/- 3 mSv and for PT 3 +/- 1 mSv. This represents a 57% dose reduction for PT compared with RGs and a 67% dose reduction for PT compared with RGb. In conclusion, in selected patients CCTA with the PT technique offers adequate image quality with a significantly lower radiation dose compared with CCTA using RG techniques.
机译:我们研究的目的是在图像质量和辐射剂量方面,比较前瞻性触发(PT)CT技术与回顾性门控(RG)CT技术在冠状动脉计算机断层血管造影(CCTA)中的应用。连续入选了60名患者。使用RG技术的CCTA通过双源64层CT系统通过ECG触发的管电流调制在40例患者中获得,在RR间隔的30-80%处具有宽脉冲窗口(RGb组,20例患者) ,心率> 70 bpm)或70%时出现小的脉动窗(RGs组,20名患者,心率<70 bpm)。其他20例患者在128层CT系统上使用PT技术进行了CCTA(PT组,心率<70 bpm)。两名观察员对所有图像的质量进行了三点评估,其中1项优秀,3项不够。计算每个患者的有效辐射剂量。 PT的平均图像质量得分为1.5 +/- 0.6,RG的平均图像质量得分为1.35 +/- 0.5,而RGb的平均图像质量得分为1.65 +/- 0.5。 RGb的平均有效剂量为9 +/- 4 mSv,RGs的平均有效剂量为7 +/- 3 mSv,PT 3的平均有效剂量为PT 3 +/- 1 mSv。与RGs相比,这意味着PT的剂量减少了57%,与RGb相比,这意味着PT的剂量减少了67%。总之,与使用RG技术的CCTA相比,采用PT技术的CCTA在选定的患者中可提供足够的图像质量,且辐射剂量明显降低。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号