Distribution and regional variation of wall shear stress in the curved middle cerebral artery using four-dimensional flow magnetic resonance imaging

Quantitative Imaging in Medicine and Surgery

article

Xiaoyan Bai¹  Mingzhu Fu⁴  Zhiye Li¹  Peiyi Gao³  Haiqing Zhao⁵  Rui Li⁴  Binbin Sui¹ 

[1] Tiantan Neuroimaging Center of Excellence, Beijing Tiantan Hospital , Capital Medical University;China National Clinical Research Center for Neurological Diseases;Department of Radiology, Beijing Tiantan Hospital , Capital Medical University;Center for Biomedical Imaging Research, Biomedical Engineering Department, School of Medicine , Tsinghua University;Department of Radiology , Beijing Chui Yang Liu Hospital

关键词: Wall shear stress (WSS);    oscillatory shear index (OSI);    middle cerebral artery (MCA);    magnetic resonance imaging (MRI);    four-dimensional flow imaging;   

DOI  :  10.21037/qims-22-67

学科分类：外科医学

来源: AME Publications

【 摘 要 】

Background: To investigate the distribution and regional variation of wall shear stress (WSS) in the curved middle cerebral artery (MCA) in healthy individuals using four-dimensional (4D) flow magnetic resonance imaging (MRI). Methods: A total of 44 healthy participants (18 males; mean ages: 27.16±5.69 years) were included in this cross-sectional study. The WSS parameters of mean, minimum, and maximum values, the coefficient of variation of time-averaged WSS (TAWSSCV), and the maximum values of the oscillatory shear index (OSI) were calculated and compared in the curved proximal (M1) segments. Three cross-sectional planes were selected: the location perpendicular to the beginning of the long axis of the curved M1 segment of the MCA (proximal section), the most curved M1 location (curved M1 section), and the location before the insular (M2) segment bifurcation (distal section). The WSS and OSI parameters of the proximal, curved, and distal sections of the curved M1 segment were compared, including the inner and outer curvatures of the curved M1 section. Results: Of the curved M1 segments, the curved M1 section had significantly lower minimum TAWSS values than the proximal (P=0.031) and distal sections (P=0.002), and the curved M1 section had significantly higher maximum OSI values than the distal section (P=0.001). The TAWSSCV values at the curved M1 section were significantly higher than the proximal (P=0.001) and distal sections (P<0.001). At the curved M1 section, the inner curvature showed a significantly lower minimum TAWSS (P=0.013) and higher maximum OSI values (P=0.002) than the outer curvature. Conclusions: There are distribution variation of WSS and OSI parameters at the curved M1 section of the curved MCA, and the inner curvature of the curved M1 section has the lowest WSS and highest OSI distribution. The local hemodynamic features of the curved MCA may be related to the predilection for atherosclerotic plaque development.

【 授权许可】

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