16层螺旋CT冠状动脉成像的技术与应用

目的:探讨多层螺旋CT冠状动脉造影(multislice spiral CT coromary angiography,MSCTCA)的成像技术和临床应用价值。方法:37例患者行MSCTCA检查,利用多种方法进行重建,分析影响冠状动脉图像质量的重要因素,MSCTCA对冠状动脉的显示能力,冠状动脉狭窄程度的评价,冠状动脉斑块性质的判断,冠状动脉的解剖变异,并了解桥血管和支架的通畅性。结果:容积再现图像最佳的显示相位窗为75%,左主干、左前降支重建的最佳相位为75%,右冠和左回旋支为50%~70%。MSCTCA能显示的管腔最小径1.5mm。对冠状动脉的解剖变异、冠状动脉狭窄的程度、斑块的性质及桥血管和内支架显示良好。结论:MSCTCA可作为冠心病介入治疗前的筛选,能能评价斑块的性质,在血运重建后的复查中也有很高的应用价值,并能提供冠状动脉其他病变的信息。

Climical application of 16-slice spiral CT coronary angiography

Objective:To assess the clinical value of multislice spiral CT coronary angiography(MSCTCA).Methods:31 patients were examined with MSCTCA and the images were reconstructed by several methods to analyze the factors crucial for the image quality.The ability of MSCTCA showing the coronary artery vessels,along with the nature of plaques,the presence of the degree of vascular stenosis,as well as the visualization of the bypass graft implanted and the patency of vessels were evaluated.Results:CT images obtained by volume rendering showed the best quality at 75%R-R phases.The left main coronary artery and the left anterior descending artery were all best visualized in 75%R-R phases.While the right artery and the left circumflex artery were seen well in 60%R-R phases.16-slice spiral CT was able to show the vessels in 1.5mm.It not only clearly displayed the coronary plaques and stenosis,implanted stents and bypass grafts,but also the variation of coronary artery.Conclusion:MSCTCA has a good value in the primary indentification of coronary artery disease and reexamination after revascularization.Even more it can shows the information in other diseases of coronary artery.