1. Department of Diagnostic and Interventional Radiology, Osaka University Graduate School of Medicine, Osaka, Japan
2. Department of Neurology, Osaka University Graduate School of Medicine, Osaka, Japan
3. Departments of Biomedical Engineering and Radiology, Cornell University, MedImageMetric LLC, New York, NY, USA
4. Departments of Radiology and Biomedical Engineering, Cornell University, New York, NY, USA