中华放射医学与防护杂志

曹建新,王一民,杨诚,黄毅,余婷婷.运用心电脉冲窗技术降低双源CT冠状动脉成像的辐射剂量[J].中华放射医学与防护杂志,2010,30(6):737-739

运用心电脉冲窗技术降低双源CT冠状动脉成像的辐射剂量

Reduction of radiation dose with electrocardiogram-pulsing windows technique in dual-source CT coronary angiography

投稿时间：2009-12-01

DOI：

英文关键词:Computed tomography ECG-pulsing Coronary Radiation dose

基金项目:

作者	单位
曹建新	430010 武汉, 中国人民解放军第161医院放射科
王一民	430010 武汉, 中国人民解放军第161医院放射科
杨诚	430010 武汉, 中国人民解放军第161医院放射科
黄毅	430010 武汉, 中国人民解放军第161医院放射科
余婷婷	430010 武汉, 中国人民解放军第161医院放射科

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中文摘要:

目的评价减小心电脉冲窗范围对降低双源CT冠状动脉成像辐射剂量的价值及对图像质量的影响。方法 120例心率稳定的患者接受双源CT冠状动脉检查。根据心率和心电脉冲窗的范围分成4组:心率<70次/min,心电脉冲窗范围为61%～77% R-R间期组;心率<70次/min,心电脉冲窗范围为25%～80% R-R间期组;心率>80次/min,心电脉冲窗范围为31%～47% R-R间期组;心率>80次/min,心电脉冲窗范围为25%～80% R-R间期组。记录各组的辐射剂量参数,并对图像质量进行评分。比较两个慢心率组间、两个快心率组间图像质量和辐射剂量。结果 4组的平均有效剂量依次分别为(7.06±2.13)、(11.34±3.65)、(6.67±1.97)和(9.92±3.15)mSv,慢心率患者和快心率患者使用较窄的心电脉冲窗时分别减少约37.74%和32.76%的辐射剂量,而两个慢心率两组间图像质量比较及两个快心率两组间图像质量比较均无明显差别。结论运用较窄的心电脉冲窗可以明显降低心率稳定患者双源CT冠状动脉成像的辐射剂量,而图像质量不受影响。

英文摘要:

Objective To evaluate the value of reducing radiation dose with decreased size of ECG-pulsing windows and influence on image quality in dual-source CT coronary angiography. Methods 120 patients with stable heart rate(HR) were divided into four groups according to HR and the rang of ECG-pulsing windows in dual-source CT coronary angiography: HR<70 bpm and 61%～77% R-R interval of ECG-pulsing windows,HR<70 bpm and 25%～80% R-R interval of ECG-pulsing windows,HR>80 bpm and 31%～47% R-R interval of ECG-pulsing windows, and HR>80 bpm and 25%～80% R-R interval of ECG-pulsing windows was employed,respectively. The radiation dose parameters were recorded and image quality scores were performed. The image quality and radiation dose between two slow HR groups and between two fast HR groups were compared respectively. Result The effective doses were (7.06±2.13),(11.34±3.65),(6.67±1.97) and (9.92±3.15) mSv for four groups, respectively. The effective dose was decreased by 37.74% for slow HR and by 32.76% for fast HR using narrow ECG-pulsing windows. There was no difference on image quality between two slow HR groups and two fast HR groups.Conclusions The proper application of narrow ECG-pulsing windows can reduce radiation exposure significantly to stable slow or fast HR patients in dual-source CT coronary angiography withont sacrificing the image quality.

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