冠状动脉追踪冻结技术在回顾性心电门控下改善CTCA图像质量

发布时间：2018-07-16 23:27

【摘要】：目的:评估冠状动脉追踪冻结技术(snapshot freeze,SSF)在回顾性心电门控下对CT冠状动脉图像质量的价值。方法:选取30例疑似冠心病患者进行回顾性心电门控扫描,比较标准算法(standard,STD)重建和SSF重建两种方法的图像质量和可判读性。所获图像由两位医师判读,分别按每一冠状动脉节段、每支冠状动脉及每例冠状动脉进行评分,按Likert 5分制为标准。结果:45%期相SSF算法重建图像可判读性按例[g0.0%(24/30)vs 53.3%(16/30),P=0.039],按分支[90.0%(81/90)vs 71.1%(64/90),P=0.000],和按节段[98.1%(413/421)vs 90.7%(382/421),P=0.000]均高于标准算法图像;75%期SSF算法重建图像可判读性按分支[70.0%(63/90)vs 55.6%(50/90),P=0.02]和按节段[82.7%(348/421)vs 78.4%(330/421),P=0.018]比较高于标准算法重建图像,SSF算法45%和75%期相图像质量按例数(2.8±1.0±2.1±1.2,P=0.012)(2.1±1.2 vs1.6±1.0,P=0.026),按分支(3.0±0.9 vs2.4±1.0,P=0.000)(2.6±1.2vs2.2±1.2,P=0.000)和按节段(3.3±0.9vs 2.9±1.0,P=0.000)(2.9±1.2vs2.7±1.1,P=0.000)比较均明显高于标准算法。结论:冠状动脉追踪冻结技术能明显提高后门控冠状动脉CT图像质量及可判读性,其中对45%期相重建的右冠状动脉图像质量改善作用最为明显。
[Abstract]:Objective: to evaluate the value of coronary artery tracking technique (snapshot freezeus SSF) in the quality of CT coronary artery images under retrospective electrocardiogram (ECG) gating. Methods: 30 patients with suspected coronary heart disease were selected for retrospective ECG gated scan to compare the image quality and legibility of standard algorithm (standard STD) reconstruction and SSF reconstruction. The images were interpreted by two physicians and scored according to each coronary artery segment, each coronary artery and each coronary artery, according to the Likert score system. 缁撴灉:45%鏈熺浉SSF绠楁硶閲嶅缓鍥惧儚鍙�鍒よ�绘，

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