【摘要】 目的评价导航技术三维对比剂增强磁共振冠状动脉成像的应用价值。方法应用导航技术三维对比剂增强磁共振血管成像方法,对20例受检者分别进行左、右冠状动脉成像,经后处理获得左、右冠状动脉血管图像。应用信噪比和对比噪声比评价增强前后的冠状动脉图像,并对冠状动脉主干及其主要分支的显示情况进行评价。结果(1)对获得成功的18例冠状动脉图像进行评价,增强前冠状动脉图像的信噪比为26.37±7.02,对比噪声比为14.76±6.97;增强后冠状动脉图像的信噪比为38.87±11.62,对比噪声比为33.72±10.80,经统计学比较,信噪比和对比噪声比增强前后的差异有统计学意义(t=2.91,4.62;P<0.05)。(2)对比剂增强后左、右及左回旋支冠状动脉近中段的显示率为100%,远侧段的显示率分别为94.4%、88.8%、77.8%。结论导航技术三维对比剂增强磁共振冠状动脉成像有较高的信噪比和对比噪声比,应用于临床尚需进一步的对照研究。更多还原

【Abstract】 Objective To evaluate the value of real-time navigator three-dimensional contrast enhanced MR coronary angiography. Methods Real-time navigator three-dimensional contrast enhanced MR coronary angiography was performed in twenty cases, the major coronary arteries were acquired after post-processing. The images of the major coronary arteries were evaluated with signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR), and observe the demonstration of the major coronary arteries and branches. Results Of twenty cases, real-time navigator three-dimensional contrast enhanced MR coronary angiography were successfully performed in eighteen cases. SNR and CNR were 26.37±7.02,14.76±6.97 before contrast enhancement vs 38.87±11.62,33.72±10.80 after contrast enhancement, respectively. Statistical differences were significant between them(P<0.05). The demonstration of proximal and middle of the major coronary branches, including left coronary(left main branch and left anterior descending branches), right coronary and left circumflex branch were 100%, and distal of them were 94.4%, 88.8%, and 77.8%, respectively. Conclusion Better SNR and CNR can be achieved with real-time navigator three-dimensional contrast enhanced MR coronary angiography, more researches should be done before application in clinics.更多还原