目前常用的MRA技术有时间飞越法（ time- offlight,TOF）及相位对比法（ phase- contrast, PC）。TOF 的原理为将所需采集信号区域内静态质子预饱和化，从而可以清楚地显示流入动脉血管。
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目的：通过建立适当的流体模型，评价磁共振相位对比电影法对流体定量测量的可行性及准确性。
Objective: to evaluate the feasibility and accuracy of MR phase-contrast cine technique in cerebral blood flow quantification by establish appropriate flow phantoms.
目的：通过建立适当的流体模型，评价磁共振相位对比电影法对流体定量测量的可行性及准确性。
Purpose: to evaluate the feasibility and accuracy of MR phase-contrast cine technique in cerebrospinal fluid and cerebral blood flow quantification by establish appropriate flow phantoms.
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