Radiological Physics and Technology

, Volume 9, Issue 2, pp 277–285 | Cite as

Evaluation of the impact of carotid artery bifurcation angle on hemodynamics by use of computational fluid dynamics: a simulation and volunteer study

  • Tatsunori SahoEmail author
  • Hideo Onishi


In this study, we evaluated the hemodynamics of carotid artery bifurcation with various geometries using simulated and volunteer models based on magnetic resonance imaging (MRI). Computational fluid dynamics (CFD) was analyzed by use of OpenFOAM. The velocity distribution, streamline, and wall shear stress (WSS) were evaluated in a simulated model with known bifurcation angles (30°, 40°, 50°, 60°, derived from patients’ data) and in three-dimensional (3D) healthy volunteer models. Separated flow was observed at the outer side of the bifurcation, and large bifurcation models represented upstream transfer of the point. Local WSS values at the outer bifurcation [both simulated (<30 Pa) and volunteer (<50 Pa) models] were lower than those in the inner region (>100 Pa). The bifurcation angle had a significant negative correlation with the WSS value (p<0.05). The results of this study show that the carotid artery bifurcation angle is related to the WSS value. This suggests that hemodynamic stress can be estimated based on the carotid artery geometry. The construction of a clinical database for estimation of developing atherosclerosis is warranted.


Computational fluid dynamics Pulsatile flow Carotid artery bifurcation angle Wall shear stress Atherosclerosis 



This study was supported by the Digital image scientific research conference in Mihara.

Complicance with ethical standards

Conflict of interest

The authors declare no conflicts of interest.


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Copyright information

© Japanese Society of Radiological Technology and Japan Society of Medical Physics 2016

Authors and Affiliations

  1. 1.Department of Radiological TechnologyKokura Memorial HospitalFukuokaJapan
  2. 2.Program in Biological System SciencesGraduate School of Comprehensive Scientific Research, Prefectural University of HiroshimaHiroshimaJapan

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