Detailed knowledge of the hemodynamic conditions in normal cerebral arteries is important for a better understanding of the underlying mechanisms leading to the initiation and progression of cerebrovascular diseases. Information about the baseline values of hemodynamic variables such as wall shear stresses is necessary for comparison to pathological conditions such as in cerebral aneurysms or arterial stenoses. The purpose of this study was to compare the blood-flow patterns in cerebral arteries of normal subjects determined by 4D phase-contrast magnetic resonance and image-based computational fluid-dynamics techniques in order to assess their consistency and to highlight their differences. The goal was not to validate (or disprove) any of the two methodologies but rather to identify regions where disagreements are to be expected and to provide guidance when interpreting the data produced by each technique.

中文翻译：

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正常脑动脉的血流动力学：4D 相位对比磁共振和基于图像的计算流体动力学的定性比较

详细了解正常脑动脉的血流动力学状况对于更好地了解导致脑血管疾病发生和发展的潜在机制非常重要。有关血流动力学变量（例如壁剪切应力）的基线值的信息对于与病理状况（例如脑动脉瘤或动脉狭窄）进行比较是必要的。本研究的目的是比较由 4D 相位对比磁共振和基于图像的计算流体动力学技术确定的正常受试者脑动脉的血流模式，以评估它们的一致性并突出它们的差异。