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相位对比磁共振成像中的扰相射频脉冲分析

DOI: 10.3969/j.issn.1005-3026.2015.05.006, PP. 631-635

Keywords: 磁共振成像,相位对比,扰相射频脉冲,对比度噪声比,梯度回波

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Abstract:

应用仿真实验研究了在基于梯度回波的2维相位对比磁共振序列中扰相射频脉冲的作用,应用模体和志愿者实验来确定在准确测量血流的前提下扰相射频脉冲对相位对比磁共振图像和血流测量结果的影响.相位对比磁共振对血流的测量结果显示:当扰相梯度充足时,是否使用扰相射频脉冲对测量结果无明显影响;但是当扰相梯度不充分时,使用扰相射频脉冲成像测量的血流更准确;并且使用扰相射频脉冲可以改善图像的对比度,更容易区分血流区域和静态组织.

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