| 王明亮,董光,耿海,侯伟娜,刘志健,缪飞.双源CT冠状动脉成像的重建时相及其与心率的相关性[J].中国医学影像技术,2010,26(6):1034~1037 |
| 双源CT冠状动脉成像的重建时相及其与心率的相关性 |
| Reconstruction phases of dual-source CT coronary angiography and correlation with heart rate |
| 投稿时间：2009-10-26 修订日期：2010-02-09 |
| DOI： |
| 中文关键词: 冠状血管疾病 体层摄影术,X线计算机 心率 |
| 英文关键词:Coronary disease Tomography, X-ray computed Heart rate |
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| 中文摘要: |
| 目的 探讨双源CT(DSCT)冠状动脉成像的最佳重建时相及其与心率的相关性。方法 163例患者接受DSCT冠状动脉成像检查,选择自动化最佳舒张期和最佳收缩期重建模式,按美国心脏协会(AHA)分类指南将冠状动脉树分为15个节段,分3级评价图像质量。分析冠状动脉成像重建的最佳舒张期和最佳收缩期时相位置,采用Pearson相关分析评价其与心率的相关性。结果 163例患者平均心率为(69.3±14.6)次/分,冠状动脉成像重建的最佳舒张期时相为(75.5±4.6)% R-R间期,最佳收缩期时相为(36.4±4.5)% R-R间期;最佳舒张期、最佳收缩期时相的位置与心率分别存在相关性(r=0.307、0.579,P均<0.05);单一最佳时相重建时,总体冠状动脉图像质量得分为(1.06±0.22)分。结论 DSCT冠状动脉成像质量存在两个高峰期,即舒张中期和收缩中晚期;随着心率的增高,最佳舒张期时相位于舒张中期越晚的时相,最佳收缩期时相位于收缩中晚期越晚的时相。 |
| 英文摘要: |
| Objective To evaluate the correlation of reconstruction phases and heart rate (HR) in patients undergoing dual-source CT (DSCT) coronary angiography. Methods A total of 163 patients underwent contrast-enhanced DSCT coronary angiography. Datasets of best diastolic phase (BDP) and best systolic phase (BSP) were reconstructed automatically. The image quality was assessed using a three-point scale according to the AHA criteria. Pearson correlation analysis was used for statistical procession. Results During scanning, the mean heart rate was (69.3±14.6)bpm. BDP was at (75.5±4.6)% R-R intervals, and BSP was at (36.4±4.5)% R-R intervals. Positive correlation was found between HR and BDP (r=0.307, P<0.05), also between HR and BSP (r=0.579, P<0.05). The mean score of the whole coronary in the optimal reconstruction phase was 1.06±0.22. Conclusion In DSCT coronary angiography, the best image quality can be obtained both in mid-diastole intervals and mid-late systole intervals. With the increase of HR, BDP appears more often in the later phase in mid-diastole intervals, and BSP appears more often in the later phase in mid-late systole intervals. |
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