摘要
目的:初步探讨MSCT冠状动脉成像的临床应用价值。方法:45例临床诊断或可疑冠心病的患者做MSCT冠状动脉成像检查(回顾性心电门控、0.5s螺旋扫描、心脏分段重建算法和静脉注射对比剂)。在9个心电相位窗上对冠状动脉进行图像重建并分析影像学表现。结果:45例中,左前降支、左回旋支和右冠状动脉重建图像质量最佳的相位窗多数为70％,分别占84.4％,77.8％和66.7％。左冠状动脉主干、左前降支、左回旋支和右冠状动脉显示较好且能满足影像学评价分别占93.3％,80％,60％和42.2％。在心率<60次/分的16例中,左前降支、左回旋支和右冠状动脉显示较好且能满足影像学评价分别占93.8％,75％和62.5％。在心率为60-70次/分的21例中,左前降支、左回旋支和右冠状动脉图像质量较好且能满足影像学评价分别占85.7％,66.7％和42.9％。在心率>70次/分的8例中,左前降支、左回旋支和右冠状动脉图像质量较好且能满足影像学评价分别占37.5％,12.5％和0。在冠状动脉正常或狭窄程度<50％的12例中,二维曲面重建图像显示左前降支、左回旋支和右冠状动脉的长度分别为108±15mm,81±26mm和126±16mm。结论:MSCT在多数情况下能较好地显示冠状动脉,可以作为冠状动脉病变的筛选方法。
Objective: To evaluate the clinical applicability of multislice spiral CT-coronary angiography. Materials and Methods: A total of 45 consecutive patients with known or suspected coronary artery disease were studied with a multislice spiral CT. A volume data set of the heart was acquired(retrospectively ECG-gating, 0.5s rotation, cardiac segment reconstruction algorithm, intravenous contrast agent). Next to retrospective reconstructions of contiguous cross sections at 9 phase window of the cardiac cycle, 3-dimensional reconstructions of coronary arteries were performed. Results: In the 45 patients, for left anterior descending, left circumflex and right coronary artery, optimal image quality was usually achieved in 70% phase window of the cardiac cycle. The proportion of the left main, left anterior descending, left circumflex and right coronary artery that could be evaluated were 93.3%, 80%, 60% and 42.2%, respectively. In the 16 patients with heart rate <60bpm, the proportion of the left anterior descending, left circumflex and right coronary artery that could be evaluated were 93.8%, 75% and 62.5%, respectively. In the 21 patients with heart rate 60-70bpm, the proportion of the left anterior descending, left circumflex and right coronary artery that could be evaluated were 85.7%, 66.7% and 42.9%, respectively. In the 8 patients with heart rate > 70bpm, the proportion of the left anterior descending, left circumflex and right coronary artery that could be evaluated were 37.5%, 12.5% and 0, respectively. In the 12 patients with normal coronary artery or stenoses (<50% diameter reduction), the mean visualized length of the left anterior descending was 108±15mm; left circumflex, 81±26mm; right coronary artery, 126± 16mm. Conclusions: Multislice spiral CT -coronary angiography permits the detection of coronary artery. It might be a method of choice for patients with coronary artery disease.
出处
《中国临床医学影像杂志》
CAS
2003年第3期177-180,共4页
Journal of China Clinic Medical Imaging
