使用计算流体动力学和4D流动MRI确定脑血管阻力分布
Axel Vikström1, Petter Holmlund2,3, Madelene Holmgren2,4
1Department of Diagnostics and Intervention, Biomedical Engineering and Radiation Physics, Umeå University, 901 87, Umeå, Sweden. axel.vikstrom@umu.se.
Scientific reports
|June 25, 2024
概括
这项研究引入了一种新的方法来计算大脑血管阻力 (CVR) 在个别的大脑区域. 这些发现确定了主要大脑动脉的参考CVR值,有助于分析大脑血液流动.
科学领域:
- 神经科学是一个神经科学.
- 医疗成像医学成像
- 计算流体动力学的流体动力学.
背景情况:
- 脑血管阻力 (CVR) 对于调节大脑血液流动至关重要,但个体大脑区域阻力在很大程度上仍未被表征.
- 了解领土CVR对于诊断和管理脑血管疾病至关重要.
研究的目的:
- 开发和验证使用4D流MRI,CTA和CFD计算领土CVR的方法.
- 在患有脑血管疾病,包括中风和TIA的患者中调查CVR变异.
- 为了确定中脑动脉 (MCA),前脑动脉 (ACA) 和后脑动脉 (PCA) 区域的参考CVR值.
主要方法:
- 结合4D流MRI和计算机断层扫描血管学 (CTA) 数据.
- 利用计算流体动力学 (CFD) 来计算来自威利斯圆的 perfusion 压力.
- 在患者和对照组中计算MCA,ACA和PCA的区域CVR和总CVR (tCVR).
主要成果:
- 对于MCA,ACA和PCA地区的确定的参考CVR值 (分别为33.8±10.5,59.0±30.6和77.8±21.3mmHg s/ml).
- 在患者和对照组之间的tCVR没有显著差异 (9.3±1.9对比9.3±2.0 mmHg s/ml).
- 观察到区域性抵抗和区域性大脑体积之间的反向关联 (p < 0.001).
结论:
- 开发的方法允许对领土CVR进行主体特定分析.
- 计算的区域CVR值可以作为参考,用于在威利斯圆圈中建模血液流动.
- 这种方法为大脑中的血液动力学提供了宝贵的见解,特别是在脑血管疾病的背景下.
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