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 Positron Medical Center



Kenji Ishii, M.D.


Doctor (Tokyo Metropolitan Geriatric Hospital): Michitaka Yamakawa, M.D., Ph.D.
Visiting doctors: Tadashi Nariai, M.D., Ph.D., Motoki Inaji, Ph.D., Masahiro Mishina, M.D., Ph.D. Yukihisa Suzuki, M.D., Ph.D., Mikio Hiura, M.D., Ph.D., Takuya Kawabe, M.D., Nobuyuki Okamura, M.D., Ph.D., Kotaro Hiraoka, M.D., Ph.D., Kyoji Okita, M.D.
Radiological technologist: Keiichi Oda, Ph.D.,
Radiological technologist (Tokyo Metropolitan Geriatric Hospital): Shintaro Komiya, Ryo Yoshizawa, Naoki Yokokawa, Syunsuke Takahashi, Yu Minowa
Radiosynthesis and quality control: Kiichi Ishiwata, Ph.D., Jun Toyohara, Ph.D.
Data analysis: Muneyuki Sakata, Ph.D.
Technical and administrative staff: Hatsumi Endo, R.N., Kunpei Hayshi, Hiroko Sato


Neurological Disorders, Psychiatric Disorders, Basal Ganglia, Hippocampus, Electrophysiology, Synaptic Plasticity, Dopamine, Acetylcholine

Major Research Titles

 Since its opening in 1990, Positron Medical Center has been conducting basic and clinical research regarding PET as well as clinical PET scans for patient diagnosis. So far 40 radiopharmaceuticals for human use have been approved by the Radiopharmaceutical Committee which consists of experts in chemistry, pharmacy, medicine and radiological sciences and includes members from outside the research institute. They include five radiopharmaceuticals originally developed at the Positron Medical Center (Table 1). The patients are referred by Tokyo Metropolitan Geriatric Hospital and other hospitals (Table 2). All the research protocols are under the review of Institutional Ethical Committee and follow the Ethical Guideline for Clinical Research by the Ministry of Health, Labour and Welfare. Expert clinical stuffs were appointed to support the quality as well as the safety of the clinical studies.

Table 1. Radiopharmaceuticals approved for clinical PET studies at the Positron Medical Center.

Table 2. Overall clinical PET studies at the Positron Medical Center.


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