64排螺旋CT冠状动脉成像的临床应用

目的探讨64排螺旋CT用于冠状动脉成像的图像质量和诊断冠状动脉狭窄≥50％的准确性，方法 采用64排螺旋CT对临床拟诊为冠状动脉性心脏病的113例病例扫描，其中42例有冠状动脉造影与64排螺旋CT冠状动脉成像作为对照。分析冠状动脉成像质量和计算诊断冠状动脉狭窄≥50％的敏感性、特异性、阳性预测价值及阴性预测价值。结果成像质量Ⅰ级93例（82．30％），Ⅱ级17例（15．04％），Ⅲ级3例％（2．65％）。64螺旋CT冠状动脉成像诊断冠状动脉狭窄≥50％的准确性为92．86％，敏感性、特异性、阳性和阴性预测价值分别为95．29％、93．33％、96．15％、87．50％。结论64排螺旋CT冠状动脉成像图像质量高，对冠状动脉狭窄≥50％有较高的诊断价值。

Clinical application of 64-slice CT on coronary images

Objective To evaluate the quality of coronary images of 64-slice CT and the diag nostic accuracy of coronary artery stenosis ≥ 50%. Methods One hundred and thirteen patients with suspected coronary artery disease were analyzed with 64-slice CT. Among them, 42 patients underwent conventional coronary angiography ( CAG ). Image quality was analyzed, and the sensitivity, specificity, positive and negative predictive value of ≥ 50% stenosis were also calculated. Results The images were excellent ( Ⅰ, 93, 82.30% ), sufficient ( Ⅱ, 17, 15.04% ) andnon-diagnostic ( Ⅲ, 3, 2.65% ), respectively. The sensitivity, specificity, positive and negative predictive value of ≥ 50% stenosis were 95. 29%, 93.33%, 96.15%, 87.50%, respectively. Conclusion Coronary images from 64-slice CT have excellent quality. The 64-slice CT angiography provides high diagnosis value in detecting coronary artery stenosis ≥ 50%.