1. Tohoku University,Graduate School of Biomedical Engineering, Tohoku University, Institute of Fluid Science,Sendai,Japan
2. Geneva University Hospital,Faculty of Medicine,Department of Clinical Neurosciences,Geneva,Switzerland
3. Akita University Hospital,Department of Radiology,Akita,Japan
4. Tohoku University Hospital,Department of Radiology,Sendai,Japan
5. Tohoku University, ElyT Max,Institute of Fluid Science,Sendai,Japan
6. Tohoku University,Institute of Fluid Science,Sendai,Japan