期刊
JOURNAL OF NEUROLOGY
卷 269, 期 5, 页码 2715-2719出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00415-021-10869-z
关键词
Intracranial aneurysm; Hemodynamics; 4D-flow; Permeability; Dynamic contrast-enhanced
资金
- National Key Research & Development (R&D) Program of China [2017YFC0108702]
- National Natural Science Foundation of China [81371540, 81771233, 81901197, 81930119]
- Beijing Municipal Natural Science Foundation [Z190024]
- Specific Research Projects for Capital Health Development [2018-2-2041]
In this study, the spatial relationship between hemodynamic forces and aneurysm wall permeability in unruptured saccular intracranial aneurysms was investigated. It was found that aneurysm wall permeability varied between aneurysms and within the same aneurysm, showing spatial heterogeneity. Higher permeability was associated with lower wall shear stress, indicating a potential link between aneurysm wall remodeling and hemodynamic factors.
Aneurysm wall permeability has recently emerged as an in vivo marker of aneurysm wall remodeling. We sought to study the spatial relationship between hemodynamic forces derived from 4D-flow MRI and aneurysm wall permeability by DCE-MRI in a region-based analysis of unruptured saccular intracranial aneurysms (IAs). We performed 4D-flow MRI and DCE-MRI on patients with unruptured IAs of >= 5 mm to measure hemodynamic parameters, including wall shear stress (WSS), oscillatory shear index (OSI), WSS temporal (WSSGt) and spatial (WSSGs) gradient, and aneurysm wall permeability (K-trans) in different sectors of aneurysm wall defined by evenly distributed radial lines emitted from the aneurysm center. The spatial association between K-trans and hemodynamic parameters measured at the sector level was evaluated. Thirty-one patients were scanned. K-trans not only varied between aneurysms but also demonstrated spatial heterogeneity within an aneurysm. Among all 159 sectors, higher K-trans was associated with lower WSS, which was seen in both Spearman's correlation analysis (rho = - 0.18, p = 0.025) and linear regression analysis using generalized estimating equation to account for correlations between multiple sectors of the same aneurysm (regression coefficient = - 0.33, p = 0.006). Aneurysm wall permeability by DCE-MRI was shown to be spatially heterogenous in unruptured saccular IAs and associated with local WSS by 4D-flow MRI.
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