摘要
目的:探讨多层螺旋CT(MSCT)在显示冠状动脉狭窄中的价值和限度。方法:对临床疑诊冠心病的38例患者作MSCT冠状动脉成像检查(回顾性心电门控、0.5s螺旋扫描、心脏单扇区重建算法和静脉注射对比剂),其检查结果与插管法冠状动脉造影对照。结果:在38例患者的152支冠状动脉中,CT图像能够满足管腔评价为104支(占68.4%)。对于CT图像能够满足管腔评价的冠状动脉(左前降支、左回旋支和右冠状动脉),MSCT显示冠状动脉狭窄(叟50%)的敏感度和特异度分别为87.1%和78.4%。阳性和阴性预测值分别为77.1%和87.9%。若将CT图像不能满足评价的叟50%狭窄的13支冠状动脉包括在内,其诊断敏感度为61.4%。结论:如CT图像能够满足影像学评价,MSCT对冠状动脉狭窄(叟50%)的显示具有较高的准确性。
Objective To evaluate the accuracy of multislice spiral computed tomography (MSCT) in detecting the coronary stenoses. Methods A total of 38 consecutive patients with suspected coronary artery disease were studied by MSCT (retrospective ECG-gating, 0.5 s rotation, cardiac segment reconstruction algorithm and intravenous contrast agent). The results were compared with those obtained from the quantitative coronary angiography. Results Among the 152 coronary arteries in 38 patients, 104 (68.4%)were evaluable by MSCT. In the evaluation of the coronary arteries (left anterior descending branch, left circumflex branch and right coronary artery) by CT, the sensitivity of the detection of significant coronary artery segments stenoses (≥50% reduction of vessel diameter) by MSCT was 87.1%, the specificity was 87.4%, the positive predictive value was 77.1% and the negative predictive value was 87.9%. When 13 coronary arteries with significant stenoses, which were unevaluable by MSCT, were included in the analysis, the sensitivity of diagnosis was 61.4%. Conclusions MSCT could visualize the significant coronary artery stenoses ≥50% with high accuracy if image quality is sufficient.
出处
《诊断学理论与实践》
2004年第3期154-157,共4页
Journal of Diagnostics Concepts & Practice
