双源CT前瞻性心电门控大螺距扫描主动脉血管成像

发布时间：2018-04-15 20:29

本文选题：主动脉CT血管成像 + 图像质量　；参考：《临床放射学杂志》2017年11期

【摘要】：目的探讨双源CT前瞻性心电门控大螺距(Flash spiral)扫描应用于主动脉CTA的可行性。方法将60例行主动脉CTA检查的患者随机分成3组,A组Flash spiral模式,B组胸痛三联模式,C组常规螺旋模式,对3组的扫描时间、主动脉图像质量、主动脉根部伪影及有效辐射剂量(ED)等进行比较。结果 3组扫描时间和ED比较有显著统计学差异(P0.01);3组主动脉图像质量比较无统计学差异(P0.05);3组主动脉根部伪影发生率比较,A、B组无统计学差异(P0.05),C组与A、B组有统计学差异(P0.05)。A组与B、C组CT值和噪声比较有显著统计学差异(P0.01),B、C组CT值和噪声比较无统计学差异(P0.05),3组信噪比(SNR)和对比噪声比(CNR)比较无统计学差异(P0.05)。结论双源CT Flash spiral模式主动脉CTA能获得满足诊断要求的图像,同时显著降低辐射剂量。
[Abstract]:Objective to investigate the feasibility of dual source CT prospective ECG gated large pitch flash spiralography in aortic CTA.Methods 60 patients with aortic CTA were randomly divided into 3 groups: group A, Flash spiral model, group B, group C, triple mode of chest pain, group C, routine spiral mode, scanning time and aortic image quality.Aortic root artifact and effective radiation dose (EDD) were compared.Results there was significant difference in scanning time and Ed among the three groups. There was no significant difference in aortic image quality among three groups. There was no statistical difference in the incidence of aortic root artifact in P0.05 group. There was no statistical difference in the incidence of aortic root artifact in group A (P 0.05). There was statistical difference between group C (P 0.05) and group A (B).There was significant difference in CT value and noise between group A and group B C. There was no significant difference in CT value and noise between group A and group B C. There was no significant difference in SNR (SNR) and ratio of contrast noise (CNR) between group P0.05 and group C (P 0.05).Conclusion Dual-source CT Flash spiral model of aortic CTA can obtain images that meet the diagnostic requirements and significantly reduce the radiation dose.
【作者单位】：大连医科大学附属第一医院心脏CT检查科;
【分类号】：R543.1;R816.2

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