CTA多期动态重建显示腹主动脉夹层内膜搏动的应用价值

发布时间：2018-04-17 18:06

本文选题：动态重建 + 腹主动脉夹层　；参考：《山东大学学报(医学版)》2016年03期

【摘要】：目的探讨低剂量回顾性心电门控CTA多期相动态重建对显示腹主动脉夹层内膜搏动的应用价值。方法腹主动脉夹层患者30例行光子CT低剂量回顾性心电门控扫描,从0%~95%R-R间期每隔5%进行图像重建,测量20期图像中腹腔干、肠系膜上动脉、左右肾动脉根部水平真腔短轴直径和相应水平腹主动脉直径,计算两者比值(d-T/d-AA)、真腔/腹主动脉(d-T/d-AA)的最大值、最小值和位于70%R-R间期时两者的比值;比较三者之间有无差异,间接找出评价内膜搏动范围。结果腹腔干、肠系膜上动脉水平内膜搏动范围较大,在70%R-R、d-T/d-AA的最大值、最小值之间均有明显变化,左右肾动脉水平内膜在d-T/d-AA最大值与最小值期相之间搏动明显,在70%R-R与d-T/d-AA最大、最小值期相之间搏动弱,变化不明显。有效辐射剂量(16.1±2.19)m Sv。结论低剂量回顾性心电门控CTA多期动态重建能良好地显示腹主动脉夹层内膜搏动的情况。
[Abstract]:Objective to investigate the value of multiphase dynamic reconstruction with low dose retrospective gated CTA in the diagnosis of abdominal aortic dissection with endomembranous pulsation.Methods Thirty patients with abdominal aortic dissection underwent low dose retrospective electrocardiogram (ECG) gated scanning with low dose of photon CT. The abdominal trunk and superior mesenteric artery were measured from every 5% of 0%~95%R-R interval in 20 stage images of abdominal cavity and superior mesenteric artery.The short axis diameter of left and right renal artery and the corresponding diameter of abdominal aorta were calculated to calculate the maximum and minimum values of the ratio of d-T / d-AAA, the minimum value and the ratio at the 70%R-R interval, and to compare whether there were any differences among the three groups.Evaluate the range of endometrial pulsatile indirectly.Results the range of endometrial pulsation in the superior mesenteric artery was larger in the celiac trunk, and there were significant changes between the maximum and minimum values of 70 R-Rnd-Tr / d-AA, and between the maximum and minimum phases of d-T/d-AA in the left and right renal arteries, and the maximum pulsation between 70%R-R and d-T/d-AA in the left and right renal artery levels.The pulsation between the phases of the minimum phase is weak and the change is not obvious.The effective radiation dose was 16.1 卤2.19mSv.Conclusion Multi-stage dynamic reconstruction of CTA with low dose retrospective electrocardiogram can well demonstrate the endomembranous pulsatility of abdominal aortic dissection.
【作者单位】：泰山医学院研究生部;山东省医学影像学研究所;山东大学附属省立医院医学影像科;山东大学医学院;
【基金】：国家自然科学基金(81371547) 山东省自然科学基金(ZR2012HM006) 山东省科技发展计划项目(2014GSF118103) 泰山学者工程专项经费
【分类号】：R543.1;R816.2

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