中文摘要：

为了研究扰相梯度对流动伪影的抑制作用,针对相位对比磁共振成像的过程进行仿真研究。在仿真中模拟液体中质子的流动、磁共振成像中信号采集和信号处理的整个过程。经过仿真得到的相位对比图像可用来测量液体的流速,并与设定的流速值进行对比。结果表明,仿真结果反映了真实的流速信息。为了对仿真结果进行进一步的验证,进行了模体的实验。仿真结果和实验结果具有良好的一致性。

英文摘要：

2D phase contrast magnetic resonance imaging （PC-MR/） is a very important technique for measuring the flow of the blood and cerebrospinal fluid. Choosing the correct parameter is very important for PC-MR/, because the PC-MR/is focused on imaging the flow, but the flow can very easily cause artifact on image which makes the measured result inaccurate. To do the simulation is very important to analyze the gradient spoiler for suppressing the flow artifact. This simulation includes the flow of the proton, the whole process of the signal acquisition and processing for MRI. The simulated phase-contrast image can be used to calculate the flow and compare with the programmed value. A flow phantom experiment has been carried out to validate the simulation result. The result indicates that our simulation and flow phantom experiment have good agreement.