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RISS 인기검색어
- 검색키워드
- 저자 : Taku Kitagawa (검색결과 2 건)
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Status of a Carbon-Ion Therapy Facility and Development for Advanced Treatment
Atsushi Kitagawa,Takashi Fujita,Akifumi Fukumura,Takuji Furukawa,Taku Inaniwa,Yoshiyuki Iwata,Tatsuaki Kanai,Mitsutaka Kanazawa,Nobuyuki Kanematsu,Yuki Kase,Masataka Komori,Koji Noda,Yumiko Ohno,Shinj 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.6
Over 3000 cancer patients have already been treated with 140- to 400-MeV/n carbon beams produced by the heavy ion medical accelerator in Chiba (HIMAC) at the National Institute of Radiological Sciences (NIRS) since 1994. These clinical results have clearly verified the advantages of carbon ions. Based on our experience at HIMAC, a hospital-specific facility optimized for carbon-ion therapy has been designed. The prototype developments of an electron cyclotron resonance (ECR) ion source, a radio frequency quadruple (RFQ) linac, an inter digital H (IH) linac, an acceleration system of synchrotron, a beam-delivery system and other key-technology parts have been successfully finished. Thus, in co-operation with NIRS, Gunma University has been constructing a carbon-therapy facility since April, 2006. If the present clinical results are to be improved, it is necessary to create a more accurate dose distribution on tumors without an undesired dose being deposited in normal tissue. Beam-scanning methods with respiration-gated irradiation are especially important to treat a cancer tumor located in the trunk of a patient. Over 3000 cancer patients have already been treated with 140- to 400-MeV/n carbon beams produced by the heavy ion medical accelerator in Chiba (HIMAC) at the National Institute of Radiological Sciences (NIRS) since 1994. These clinical results have clearly verified the advantages of carbon ions. Based on our experience at HIMAC, a hospital-specific facility optimized for carbon-ion therapy has been designed. The prototype developments of an electron cyclotron resonance (ECR) ion source, a radio frequency quadruple (RFQ) linac, an inter digital H (IH) linac, an acceleration system of synchrotron, a beam-delivery system and other key-technology parts have been successfully finished. Thus, in co-operation with NIRS, Gunma University has been constructing a carbon-therapy facility since April, 2006. If the present clinical results are to be improved, it is necessary to create a more accurate dose distribution on tumors without an undesired dose being deposited in normal tissue. Beam-scanning methods with respiration-gated irradiation are especially important to treat a cancer tumor located in the trunk of a patient.
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Realization of Mobility-Controlled Flying Router in Information-Centric Networking
Yuhao Gao,Taku Kitagawa,Suyong Eum,Shingo Ata,Masayuki Murata 한국통신학회 2018 Journal of communications and networks Vol.20 No.5
Constructing a large-scale network in outdoor fieldswith wired or wireless antennas involves a huge deployment cost. New devices, called movable routers, are able to realize the networksat a low cost. Recently, a large number of internet of thingsnodes have been deployed into the networks in outdoor fields. Inthe current communication network, users intend to communicatewith devices without knowing where they are, but the currentnetwork still focuses on device locations, complicating configurationand implementation of the network. In this study, we designan architecture called router-movable information-centric networking(RMICN) to realize content-based communication insteadof host-based communication, for facilitating communications betweendisjointed networks using movable routers. We incorporateinformation-centric networking technologies in the design of thesystem for the naming scheme and the strategy layer, enabling devicecontrol over the movable routers, called flying routers. In thesimulation results, we show that RMICN can further reduce the responsetime of content requests compared with delay-tolerant networking. Furthermore, we present a proof-of-concept implementationof the architecture to confirm the feasibility of the design.
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