| 曹建新,王一民,杨诚,陶伟,张昌立,黄毅,余婷婷.最佳心电脉冲窗技术在双源CT冠状动脉成像中的应用[J].中国医学影像技术,2010,26(11):2191~2194 |
| 最佳心电脉冲窗技术在双源CT冠状动脉成像中的应用 |
| Application of optimum ECG-pulsing windows in retrospective ECG-gate dual-source CT coronary angiography |
| 投稿时间：2010-06-08 修订日期：2010-07-08 |
| DOI： |
| 中文关键词: 体层摄影术,X线计算机 心电脉冲 冠状血管造影术 辐射剂量 |
| 英文关键词:Tomography, X-ray computed ECG-pulsing Coronary angiography Radiation dosage |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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 P＜0.05). 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 (P＞0.05). Conclusion Radiation exposure to patients can be reduced significantly with optimum ECG-pulsing windows in dual-source coronary angiography while preserving good image quality. |
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