延迟采集和连续采集以及心动周期对冠状静脉CT图像质量的影响

发布时间：2018-04-20 00:09

本文选题：X线计算机 + CT冠状动脉造影　；参考：《广东医学》2017年12期

【摘要】：目的比较320排CT前瞻性心电门控冠状动、静脉成像时延迟采集和连续采集两种静脉延迟采集方法及心脏收缩舒张期对冠状静脉的显示质量和显示率的影响。方法 50例临床需要进行冠状动、静脉CT造影的患者随机分为两组:连续组22例连续扫描5个心动周期,前面3个心动周期用于冠状动脉成像,最后1~2个心动周期用于冠状静脉重建;延迟组28例先扫描1~2个心动周期用于冠状动脉成像,延迟5 s后再扫描1~2个心动周期用于冠状静脉重建。比较两种扫描模式、心脏收缩期和舒张期的冠状静脉显示质量和显示率。结果延迟组的扫描方案较连续组静脉管腔内CT值更高,差异有统计学意义(P0.05)。静脉窦及其属支在静脉窦及其属管径、面积收缩期均大于舒张期。静脉窦在75%舒张期CT值较高,而心中静脉及左室后静脉在35%收缩期CT值较高,心中静脉无明显差异。结论 320排CT前瞻性心电门控冠状动、静脉成像时冠状动脉采集后延迟5 s进行心脏收缩期采集可以得到更高的冠状静脉显示质量及显示率。
[Abstract]:Objective to compare the two methods of delayed acquisition and continuous acquisition in 320 slice CT prospective ECG gated coronary artery, and to compare the effect of cardiac systolic and diastolic phase on the display quality and display rate of coronary vein. Methods Fifty patients with coronary arteriography and venography were randomly divided into two groups: continuous group (n = 22), continuous scanning for 5 cycles, and coronary angiography for the first 3 cycles. The last 1 ~ 2 cardiac cycles were used for coronary vein reconstruction, 28 cases in delayed group were scanned for coronary artery imaging at first, and then 1 ~ 2 cardiac cycles were scanned for coronary vein reconstruction after 5 seconds delay. The quality and display rate of coronary veins in systolic and diastolic phases were compared. Results the CT value of the delayed group was higher than that of the continuous group, and the difference was statistically significant (P 0.05). The diameter and area of venous sinus and its branches were larger than that in diastolic period. The CT value of venous sinus at 75% diastolic phase was higher than that of cardiac vein and left ventricular posterior vein at 35% systolic phase. Conclusion 320-slice CT prospective ECG gated coronary artery, coronary artery acquisition delayed 5 seconds after coronary artery acquisition for cardiac systolic sampling can obtain higher display quality and display rate of coronary vein.
【作者单位】：河北北方学院研究生部;中国人民解放军第三○九医院放射科;天津泰达心血管医院放射科;
【基金】：国家自然科学基金资助项目(编号:81671680) 北京市科技计划课题(编号:Z161100000516177)
【分类号】：R541.4;R816.2

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