A Combined Computational Fluid Dynamics and Arterial Spin Labeling MRI Modeling Strategy to Quantify Patient-Specific Cerebral Hemodynamics in Cerebrovascular Occlusive Disease

被引:14
作者
Schollenberger, Jonas [1 ]
Osborne, Nicholas H. [2 ]
Hernandez-Garcia, Luis [1 ,3 ]
Figueroa, C. Alberto [1 ,2 ]
机构
[1] Univ Michigan, Dept Biomed Engn, Ann Arbor, MI 48109 USA
[2] Univ Michigan, Dept Surg, Ann Arbor, MI 48109 USA
[3] Univ Michigan, Funct MRI Lab, Ann Arbor, MI 48109 USA
关键词
arterial spin labeling; computational fluid dynamics; cerebral hemodynamics; cerebrovascular occlusive disease; circle of willis; collateral flow; carotid stenosis; FRACTIONAL FLOW RESERVE; 3-DIMENSIONAL HEMODYNAMICS; CIRCULATION; SIMULATION; INFARCTS; STROKE; RISK;
D O I
10.3389/fbioe.2021.722445
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
Cerebral hemodynamics in the presence of cerebrovascular occlusive disease (CVOD) are influenced by the anatomy of the intracranial arteries, the degree of stenosis, the patency of collateral pathways, and the condition of the cerebral microvasculature. Accurate characterization of cerebral hemodynamics is a challenging problem. In this work, we present a strategy to quantify cerebral hemodynamics using computational fluid dynamics (CFD) in combination with arterial spin labeling MRI (ASL). First, we calibrated patient-specific CFD outflow boundary conditions using ASL-derived flow splits in the Circle of Willis. Following, we validated the calibrated CFD model by evaluating the fractional blood supply from the main neck arteries to the vascular territories using Lagrangian particle tracking and comparing the results against vessel-selective ASL (VS-ASL). Finally, the feasibility and capability of our proposed method were demonstrated in two patients with CVOD and a healthy control subject. We showed that the calibrated CFD model accurately reproduced the fractional blood supply to the vascular territories, as obtained from VS-ASL. The two patients revealed significant differences in pressure drop over the stenosis, collateral flow, and resistance of the distal vasculature, despite similar degrees of clinical stenosis severity. Our results demonstrated the advantages of a patient-specific CFD analysis for assessing the hemodynamic impact of stenosis.
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页数:15
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