摘要
目的探讨64层螺旋CT冠状动脉成像评价冠状动脉钙化和狭窄的临床应用价值。方法对32例临床确诊或疑诊冠状动脉粥样硬化性心脏病患者行64层螺旋CT冠状动脉成像。利用平扫图像进行钙化积分测量,冠状动脉CTA扫描后进行多平面重建(MPR)、曲面重建(CPR)及容积再现(VRT),其中,9例行常规冠状动脉造影作对照,总结CTA的评价方法和显示情况,分析影响冠状动脉成像质量的因素。结果64层螺旋CT平扫能测定钙化积分,而MPR、CPR及VRT能多角度显示冠状动脉主干及主要分支,MPR与CPR对显示冠状动脉病变优于VRT。本组患者中,冠状动脉管壁欠光滑见于10例,管壁钙化11例,非钙化斑块15例,管腔狭窄18例。影响图像质量的因素主要是心率、心律及呼吸运动。结论64层螺旋CT冠状动脉成像是一种安全、快速、无创的诊断冠状动脉粥样硬化性心脏病的方法,也可作为筛查公众中冠状动脉病变的重要手段。
Objective To discuss the clinical application of （M-slice spiral CT coronary angiography （CTA） in the evaluation of coronary artery calcification and stenosis. Methods Thirty-two patients with known or suspective atherosclerotic coronary artery disease （CAD） underwent 64-slice coronay CTA. The calcification scores were measured on plain scan images. Multiplanar reconstruction （MPR）, curved planar reconstruction （CPR） and volume rendering technique （VRT） were carried out after coronary CTA scans. Of whom, 9 patients who underwent conventional coronary angiography were be taken as controls. The evaluation modality and visualization capability of CTA were summarized together with analyzing the influencing factors of imaging quality. Results 64-slice spiral CT plain scans may measure the calcification scores, while MPR, CPR and VRT may show at muhiangular the main trunci and main branches of coronary arteries. MPR and CPR images were superior to VRT images in visualizing coronary arteries. Among the group patients, insufficient smooth of coronary artery walls were found in 10, calcification of walls in 11, noncalcified plaque in 15, and luminal stenosis in 18. The influencing factors of imaging quality were mainly heart rate, the presence or absence of arrhythmia and respiratory motion. Conclusion 64-slice coronary CTA is a safe, quick and noninvasive means for diagnosing atherosclerotic CAD and it can be taken as an important method for screening CAD in public population.
出处
《实用医学影像杂志》
2010年第1期15-17,23,共4页
Journal of Practical Medical Imaging
