冠状动脉追踪冻结技术对高心率受检者CT冠状动脉成像质量的影响

发布时间：2018-08-06 08:57

【摘要】：目的探讨冠状动脉追踪冻结(SSF)技术对高心率(85~135 bpm)受检者CT冠状动脉成像质量的影响。方法搜集冠状动脉CT造影的228例患者,其中188例患者扫描前未服用控制心率药物;对照组控制心率患者40例,扫描前常规服用倍他乐克,减少心率变异性;回顾性心电门控和单扇区重组扫描技术,原始数据使用标准算法(STD)和SSF两种方法重组,由2名资深医师采用双盲法判读,采用4分评分法对冠状动脉血管每个阶段进行评分,≤3分为可诊断图像。对STD和SSF两种算法数据图像整体质量的比较采用卡方检验,对节段水平图像质量等级评分采用配对设计两样本比较的秩和检验(Wilcoxon两样本比较法)分析。结果 188例患者共评价冠状动脉节段1494段,可显示节段1494段,显示率100%;STD重组算法组冠状动脉可诊断节段总数为1415段,不可诊断节段共79段,总体可诊断率94.7%。SSF重组算法组冠状动脉可诊断节段为1450段,不可诊断节段共44段,总体可诊断率97.1%。两种算法冠脉总体可诊断率比较,其差异有统计学意义(χ2=812.02,P0.05)。40例对照组STD重组算法冠状动脉可诊断节段总数为469段,不可诊断节段共19段,总体可诊断率96.1%。SSF重组算法冠状动脉可诊断节段总数为485段,不可诊断节段共3段,总体可诊断率99.4%。两种算法冠状动脉总体可诊断率比较,其差异有统计学意义(χ2=865.84,P0.05)。基于节段水平分析,两种重组算法图像质量差异有统计学意义(P0.05)。结论与STD相比,SSF对中低心率和高心率冠状动脉节段图像质量均有改善,但对易受高心率心脏运动影响的右冠状动脉节段效果更为显著,高心率受检者CT冠脉成像采用SSF技术,可以显著减轻运动伪影,提高右冠状动脉图像质量。
[Abstract]:Objective to investigate the effect of frozen coronary artery tracing (SSF) technique on CT coronary angiography in patients with high heart rate (85 ~ 135 bpm). Methods 228 patients with coronary arteriography, 188 patients without heart rate control drugs before scanning, 40 patients with heart rate control group, 40 patients with heart rate control, who were routinely taken betaloc before scanning, to reduce heart rate variability. Retrospective ECG gating and single sector recombination scanning techniques were performed. The original data were reconstructed by two standard algorithms, (STD) and SSF. The two senior physicians interpreted the data by double blind method, and scored each stage of coronary artery by 4 points scoring method. 鈮，

本文编号：2167204