文档介绍：64层螺旋CT冠状动脉成像诊断其狭窄的准确性
【摘要】目的探讨64层螺旋CT冠状动脉成像对冠状动脉狭窄诊断价值。方法选择60例临床上具有高危因素的可疑及已确诊的拟行冠状动脉造影的冠心病病人,在有创血管造影前1 d先进行对比剂增强的64层螺旋CT检查,其检查结果与有创冠状动脉造影结果进行对照。结果共780个节段中,712个节段能满足管腔评价(每例均对冠状动脉的13个节段进行分析),68个节段因严重钙化、运动伪影无法对管腔进行评价。以有创冠状动脉造影结果为金标准,64层螺旋CT测定狭窄程度&lt;50%、50%~75%、&gt;75%病变的灵敏度分别为75%、81%、88%,特异度达97%。结论 64层螺旋CT冠状动脉血管成像有较高的诊断准确性,可作为评价、筛查冠状动脉狭窄的一种无创检查方法。
【关键词】冠状动脉狭窄体层摄影术 X线计算机血管造影术
[ABSTRACT]ObjectiveTo evaluate the accuracy of 64slice spiral CT in detecting coronary artery with or highly suspected coronary artery disease (n=60) were studied by 64slice spiral CT, one day before invasive coronary angiography (ICA). Data obtained from CT and ICA the 780 segments, 712 met the requirements for assessment, in which, 13 segments were evaluated in each patient; 68 segments failed to evaluate due to severe calcifications and motion artifacts. Based on the gold standards of ICA, the accuracy in detection of coronary segment stenosis was 75%,81%,88% vs &
lt;50%, 50%-75% and &gt;75%, respectively. Specificity was 97%.Conclusion64slice spiral CT is an useful method to evaluate and screen coronary artery stenosis with high accuracy.
[KEY WORDS]coronary stenosis; tomography, Xputed; angiography
临床上对具有高危因素的可疑冠心病及已确诊冠心病病人冠状动脉狭窄程度的测定,均有赖于有创的冠状动脉造影术(ICA)。但此法为有创性检查,有一定的并发症甚至死亡率,而且费用高。另外,20%~27%有创造影结果显示正常或轻微病变[1]。2004年,64层螺旋CT进入临床,这种应用于临床的最新一代的多层螺旋C