自由呼吸状态下冠状动脉CT造影可行性研究

发布时间：2018-12-13 19:56

【摘要】：目的探讨自由呼吸、不屏气状态下,利用256-MDCT行冠状动脉造影的可行性。方法 80例受检者随机分为两组:A组40例,扫描时须受检者屏气配合;B组40例,检查全过程无屏气口令,受检者自由呼吸。比较两组图像噪声水平、信噪比、主观评分(3分制:3分最佳,2分尚可,1分不能满足诊断)、辐射剂量。比较两组增强扫描前后心率变化程度。结果两组间噪声水平、信噪比、辐射剂量均无统计学差异。增强扫描前与增强扫描中心率差异:A组(6.80±7.59)bpm,B组(3.03±2.58)bpm(P=0.012)。图像质量主观评分:A组(2.55±0.64)分,B组(2.85±0.36)分(P=0.018)。两种扫描模式相比,自由呼吸状态心率变化较小,检查效果更佳。结论针对本研究中使用的设备及扫描方案,自由呼吸状态下行CCTA检查,效果优于屏气状态下检查。
[Abstract]:Objective to investigate the feasibility of coronary angiography with 256-MDCT under the condition of free breathing and no breath holding. Methods 80 patients were randomly divided into two groups: group A (n = 40), group A (n = 40) and group B (n = 40). The noise level, signal-to-noise ratio and subjective score of the two groups were compared (3 points were the best, 2 points were fair, 1 score could not meet the diagnosis), radiation dose. The changes of heart rate before and after enhanced scan were compared between the two groups. Results there was no significant difference in noise level, signal-to-noise ratio and radiation dose between the two groups. The center rate of contrast enhanced scanning was (6.80 卤7.59) bpm,B (3.03 卤2.58) bpm (). Subjective score of image quality: group A (2.55 卤0.64), group B (2.85 卤0.36) (P0. 018). Compared with the two scanning modes, the heart rate in the free breathing state changed less and the examination effect was better. Conclusion for the equipment and scanning scheme used in this study, the effect of CCTA examination under the condition of free breathing is better than that under breath holding state.
【作者单位】：北京大学人民医院放射科;
【分类号】：R816.2

【相似文献】