N
Norimasa Nohara
Researcher at National Institute of Radiological Sciences
Publications - 35
Citations - 484
Norimasa Nohara is an academic researcher from National Institute of Radiological Sciences. The author has contributed to research in topics: Detector & Scintillation. The author has an hindex of 14, co-authored 34 publications receiving 478 citations.
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Journal ArticleDOI
Analytical study of the performance of a multilayer positron computed tomography scanner.
TL;DR: Comparison with experimental data obtained with a head positron tomograph, positologica, showed reasonable agreement both in the total coincidence rates and in the scatter components in the images for a cylindrical phantom of 20 cm in diameter.
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Positologica: A Positron ECT Device with a Continuously Rotating Detector Ring
Norimasa Nohara,Eiichi Tanaka,Takehiro Tomitani,Mikio Yamamoto,Hideo Murayama,Yoshio Suda,Masahiro Endo,Takeshi Iinuma,Yukio Tateno,Fumio Shishido,Kenji Ishimatsul,Ken Ueda,Katsumi Takami +12 more
TL;DR: A rotary positron emission computed tomography device is developed for human brain and animal studies that utilizes 64 rectangular BGO detectors arranged at unequal spacing on a circular ring for high detector redundancy.
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Development of a high resolution PET
T. Yamashita,H. Uchida,Hiroyuki Okada,T. Kurono,T. Takemori,Mitsuo Watanabe,K. Shimizu,Etsuji Yoshikawa,T. Ohmura,N. Satoh,Eiichi Tanaka,Norimasa Nohara,Takehiro Tomitani,Masahito Yamamoto,Hideo Murayama,Masahiro Endo +15 more
TL;DR: In this paper, a high-resolution positron emission tomograph (PET) for brain studies has been developed, which consists of five detector rings (240 BGOs/ring).
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A quad BGO detector and its timing and positioning discrimination for positron computed tomography
TL;DR: In this article, the authors developed a four BGO detectors and the timing and positioning discriminator for high sensitivity multilayer positron computed tomographs, which allows good optical coupling between the crystals and the photomultiplier tubes, which is essential in order to obtain good time resolution with reasonable spatial resolution of the system.
Journal ArticleDOI
"Positology"-the search for suitable detector arrangements for a positron ECT with continuous rotation
Eiichi Tanaka,Norimasa Nohara,Mikio Yamamoto,Takehiro Tomitani,Hideo Murayama,Kenji Ishimatsu,Katsumi Takami +6 more
TL;DR: In this paper, the authors proposed a continuously rotating positron ECT system, in which the detectors are arranged on a circular ring with "non-uniform" spacing so as to provide much finer sampling interval in the projections than the conventional circular ring system.