1. Department of Diagnostic Radiology, Graduate School of Medicine, Tohoku University, Sendai, Japan
2. Department of Radiology, Akita University Graduate School of Medicine, Akita, Japan
3. Department of Behavioral Neurology and Cognitive Neuroscience, Tohoku University, Sendai, Japan
4. Department of Epileptology, Graduate School of Medicine, Tohoku University, Sendai, Japan,
5. Department of Neurosurgery, Graduate School of Medicine, Tohoku University, Sendai, Japan,