16层螺旋CT与导管法冠脉成像的对照研究

目的 与导管法冠脉成像相对照，探讨16层螺旋CT冠脉造影的临床应用价值。方法 20例16层螺旋CT冠脉造影病例，使用GE Pro lightspeed Plus 16层螺旋CT，选择图像显示最优相位窗对所有管腔直径大于≥2mm冠脉及主要分支血管进行评估及狭窄评价，图像重建方法包括二维曲面重建（CPR）、最大密度投影（MIP）和容积再现（VR）重建，均行导管法冠脉造影对照。结果 在205支冠脉血管中180支可以进行评价，以导管法冠脉造影结果为对照，16层螺旋CT诊断冠脉狭窄≥50%的敏感度、特异度、阳性预测值、阴性预测值分别为89．4%、95．7%、88．5%、96．6%。结论 16层螺旋CT能较准确诊断冠状动脉50%以上的狭窄，是无创性诊断冠状动脉狭窄的有效检查方法。

Relation between 16-slice spiral computed tomography and conventional coronary artery angiography

Objective To evaluate the clinical value of 16-slice spiral CT coronary angiography in comparison with conventional coronary artery angiography. Methods 20 patients underwent coronary imaging with GE Lightspeed Pro 16 computed tomography. All coronary artery and side branches with luminal diameter 〉 2mm were assessed. The imaging data of 16-slice CT scans was reconstructedwith MIP（maximal intensity projection）, CPR（curved planner reconstruction）, VR （ volume rendering ）. Conventional coronary artery angiography was performed in all cases by contrast. Results Of 205 coronary arteries, 180 could be evaluated. Comparative study showed that the sensitivity, specificity, positive predictive value, negative predictive value for the detection of ≥ 50% stenosis of 16-slice coronary CT angiography were 80.7%, 94.8%, 72.4%, 96.6% respectively. Conclusion 16-slice spiral CT coronary angiography provides a noninvasive and sensitive diagnostic technique for the screening of ≥50% stenosis of coronary artery disease.