| 正常和慢心率CT冠状动脉低剂量扫描对比研究 |
| 投稿时间：2015-03-18 修订日期：2015-03-27 点此下载全文 |
| 引用本文：朱玉秀,卢霞,李桢,王晓辉.正常和慢心率CT冠状动脉低剂量扫描对比研究[J].医学研究杂志,2015,44(11):129-132 |
| DOI：
10.11969/j.issn.1673-548X.2015.11.036 |
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| 中文摘要:目的 探索正常和慢心率患者128层螺旋CT冠状动脉低剂量扫描方案。方法 入选临床疑似冠脉疾病患者300例,按心率分为60~75次/分和60次/分以下两大组,分别采用回顾性心电门控和前瞻性心电门控扫描模式,其中每组再随机分为3小组(各50例),分别采用常规扫描技术(默认管电流)、CARE Dose4D技术(实时动态调节技术)及低剂量技术进行扫描,记录各组图像质量评分和辐射剂量并比较分析。结果 回顾性心电门控常规组、4D组及低剂量组的有效辐射剂量分别为6.08±0.91、5.69±0.80、2.74±0.51mSv,前瞻性心电门控常规组、4D组及低剂量组的有效辐射剂量分别为1.63±0.27、1.58±0.23、0.82±0.22mSv。两常规组间、4D组间及低剂量组间的有效辐射剂量差异有统计学意义(P<0.01)。结论 128层螺旋CT冠状动脉检查应尽量降低患者心率,根据心率选择不同扫描方案,心率在60~75次/分者宜采用回顾性心电门控低剂量扫描方案,心率在60次/分以下者宜采用前瞻性心电门控低剂量扫描方案,以最大限度降低患者所接受的辐射剂量。 |
| 中文关键词:冠状动脉 辐射剂量 体层摄影术 X线计算机 |
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| Comparison Study between Normal and Slow Heart Rate CT Coronary Artery Low-dose Scanning. |
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| Abstract:Objective To explore the low doses coronary scanning methods with the different heart rates on 128 slices spiral CT. Methods The study enrolled 300 patients suspected with coronary disease. All cases were divided into two groups according to the heart rate 60-75 times/min or less than 60 times/min, retrospectively ECG-gated technique or prospectively ECG-gated technique. Each group was randomly subdivided into three groups, the normal group(the default tube current), CARE Dose4D group and low-does technique group. The image quality and radiation dose were compared. Results In the retrospective group, the ED of normal group, 4D group and low-does group was 6.08±0.91, 5.69±0.80, 2.74±0.51mSv. In the prospective group, the ED of normal group, 4D group and low-does group was 1.63±0.27, 1.58±0.23, 0.82±0.22mSv, respectively. The ED had significant differences among the normal group, 4D group and low-does group(P<0.01). Conclusion For 128 slice spiral CT coronary angiography examination, the heart rate of patients should be reduced, and different scanning methods are chosen according to heart rate. If the heart rates is less than 60 times/min, the low does and prospectively ECG-gated technique is selected; if the heart rate is 60-75 times/min, the low doses and retrospectively ECG-gated technique is selected in order to minimize radiation dose received by the patients. |
| keywords:Coronary artery Radiation dose Tomography X-ray computed |
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