【摘要】：目的:評估冠狀動脈追蹤凍結技術(snapshot freeze,SSF)在回顧性心電門控下對CT冠狀動脈圖像質量的價值。方法:選取30例疑似冠心病患者進行回顧性心電門控掃描,比較標準算法(standard,STD)重建和SSF重建兩種方法的圖像質量和可判讀性。所獲圖像由兩位醫(yī)師判讀,分別按每一冠狀動脈節(jié)段、每支冠狀動脈及每例冠狀動脈進行評分,按Likert 5分制為標準。結果:45%期相SSF算法重建圖像可判讀性按例[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],和按節(jié)段[98.1%(413/421)vs 90.7%(382/421),P=0.000]均高于標準算法圖像;75%期SSF算法重建圖像可判讀性按分支[70.0%(63/90)vs 55.6%(50/90),P=0.02]和按節(jié)段[82.7%(348/421)vs 78.4%(330/421),P=0.018]比較高于標準算法重建圖像,SSF算法45%和75%期相圖像質量按例數(shù)(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)和按節(jié)段(3.3±0.9vs 2.9±1.0,P=0.000)(2.9±1.2vs2.7±1.1,P=0.000)比較均明顯高于標準算法。結論:冠狀動脈追蹤凍結技術能明顯提高后門控冠狀動脈CT圖像質量及可判讀性,其中對45%期相重建的右冠狀動脈圖像質量改善作用最為明顯。
[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. 緇撴灉:45%鏈熺浉SSF綆楁硶閲嶅緩鍥懼儚鍙垽璇繪，

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