| 覃杰,刘凌云,孟晓春,朱康顺,何可可,钱孝贤,赵长林,单鸿.320排动态容积CT冠状动脉成像的临床应用[J].中国医学影像技术,2009,25(9):1598~1600 |
| 320排动态容积CT冠状动脉成像的临床应用 |
| Initial clinical application on coronary images of 320-slice dynamic volume MDCT |
| 投稿时间：2009-06-01 修订日期：2009-06-29 |
| DOI： |
| 中文关键词: 冠状血管 体层摄影术,X线计算机 血管造影术 |
| 英文关键词:Coronary vessels Tomography, X-ray computed Angiography |
| 基金项目: |
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| 摘要点击次数: 2373 |
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| 中文摘要: |
| 目的 探讨320排动态容积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320排CT对临床拟诊为冠状动脉性心脏病的200例连续性病例进行心电门控宽探测器平台下非螺旋全器官容积增强扫描,其中18例有冠状动脉造影与冠状动脉CTA作为对照。采用横轴位、容积再现(VR)、最大密度投影(MIP)、多平面重建图像(MPR)和曲面重建(CPR)等技术,重点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 Ⅰ级173例(86.50%),Ⅱ级25例(12.50%),Ⅲ级2例(1.00%)。全部病例无阶梯伪影,运动伪影17例。320排CT冠状动脉成像诊断冠状动脉狭窄≥50%的敏感性、特异性、阳性预测价值、阴性预测价值分别为100%、98.65%、94.00%、100%。结论 320排动态容积CT冠状动脉成像图像质量高,对诊断冠状动脉狭窄≥50%有较高的敏感性和特异性。 |
| 英文摘要: |
| Objective To explore the quality of coronary images of 320-slice dynamic volume MDCT and the diagnostic accuracy of coronary artery stenosis≥50%. Methods Two hundred consecutive patients with suspected coronary artery disease were studied with ECG-gated 320-slice dynamic volume MDCT in non-helical scanning mode. Eighteen patients also underwent conventional coronary angiography (CAG). Images were retrospectively reconstructed with volume rendering (VR) technology, maximum intensity projection (MIP), multiplanar reconstruction (MPR) and curved planar reformation (CPR). Image quality was then analyzed, and the sensitivity, specificity, positive and negative predictive value of ≥50% stenosis were calculated. Results The images were excellent (Ⅰ, n=173, 86.50%), sufficient (Ⅱ, n=25, 12.50%) and non-diagnostic (Ⅲ, n=2, 1.00%), respectively. Motion artifacts were found in 17 patients. No stair-step artifact was found. The sensitivity, specificity, positive and negative predictive value of the 320-slice MDCT in detecting coronary artery stenosis≥50% was 100%, 98.65%, 94.00% and 100%, respectively. Conclusion Coronary images from 320-slice dynamic volume MDCT with wide area detector and non-helical scanning mode have excellent quality and less artifacts. The 320-slice coronary CT angiography provides high sensitivity and specificity in detecting coronary artery stenosis≥50%. |
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