[1] Tohoku Univ, Grad Sch Med, Dept Neurol, Sendai, Miyagi, Japan
[2] Tohoku Univ, Grad Sch Med, Dept Pharmacol, Sendai, Miyagi, Japan
[3] Tohoku Univ, Grad Sch Med, Dept Diagnost Radiol, Sendai, Miyagi, Japan
[4] Tohoku Univ, Ctr Cyclotron & Radioisotope, Div Cyclotron Nucl Med, Sendai, Miyagi, Japan
[5] Tohoku Univ, Ctr Cyclotron & Radioisotope, Div Radiopharmaceut Chem, Sendai, Miyagi, Japan
[6] Tohoku Univ, Inst Dev Aging & Canc, Dept Geriatr & Resp Med, Sendai, Miyagi, Japan
[7] Tohoku Univ, Inst Dev Aging & Canc, Div Neuroimaging, Sendai, Miyagi, Japan
[8] Tohoku Pharmaceut Univ Hosp, Dept Neurol, Sendai, Miyagi, Japan
[9] Sendai Med Ctr, Dept Neurol, Sendai, Miyagi, Japan
[10] Natl Hosp Org, Sendai Nishitaga Hosp, Dept Neurol, Sendai, Miyagi, Japan