摘要
目的评价最佳心电脉冲窗技术对降低双源CT冠状动脉成像(CTCA)辐射剂量的价值。方法 201例患者接受双源CT冠状动脉检查,并分成A、B两组。A组使用最佳心电脉冲窗技术,慢心率(<70次/分)、中等心率(70～80次/分)和快心率(>80次/分)患者使用的最佳心电脉冲窗范围分别为61%～77%R-R间期、30%～78%R-R间期和32%～49%R-R间期。B组使用常规心电脉冲窗技术,范围均为25%～80%R-R间期。比较两组的辐射剂量和图像质量。结果 A组慢心率、中等心率和快心率患者接受的有效辐射剂量依次为(5.41±1.36)mSv、(7.82±1.80)mSv和(4.36±0.88)mSv,B组慢心率、中等心率和快心率患者接受的有效辐射剂量依次为(10.20±3.41)mSv、(8.82±2.21)mSv和(7.61±2.19)mSv,A组和B组各心率段有效辐射剂量比较差异均有统计学意义(P均<0.05),慢心率、中等心率和快心率患者使用最佳心电脉冲窗技术时分别减少约46.96%、11.34%和42.71%的辐射剂量,而两组图像质量比较差异无统计学意义(P>0.05)。结论运用最佳心电脉冲窗技术能明显降低双源CTCA的辐射剂量,而图像质量不受影响。
Objective To evaluate the value of reducing radiation dose with optimum ECG-pulsing windows in dual-source CT coronary angiography.Methods Two hundred and one patients were divided into two groups and underwent dual-source CT coronary angiography.In group A,61%—77% R-R interval,30%—78% R-R interval and 32%—49% R-R interval of optimum ECG-pulsing windows according heart rate（HR）were used for slow HR（70 bpm）and intermediate HR（70—80 bpm）and fast HR（80 bpm）,respectively.25%—80% R-R interval of routine ECG-pulsing windows were used for all patients neglect HR in group B.The radiation dose and image quality in group A and group B were compared.Results In group A,effective dose were（5.41±1.36）mSv,（7.82±1.80）mSv and（4.36±0.88）mSv for slow,intermediate and fast HR patients,respectively.In group B,effective dose were（10.20±3.41）mSv,（8.82±2.21）mSv and（7.61±2.19）mSv for slow,intermediate and fast HR patients,respectively.There were statistical difference on effective dose for slow,intermediate and fast HR patients between two groups（all P0.05）.Radiation exposure at patients with slow,intermediate and fast HR were decreased 49.96%,11.34% and 42.71% using optimum ECG-pulsing windows,respectively.But there was no difference on image quality between two groups（P0.05）.Conclusion Radiation exposure to patients can be reduced significantly with optimum ECG-pulsing windows in dual-source coronary angiography while preserving good image quality.
出处
《中国医学影像技术》
CSCD
北大核心
2010年第11期2191-2194,共4页
Chinese Journal of Medical Imaging Technology
