Fukata, Kyohei



School of Medicine, Cancer Center (Radiotherapy Unit) (Shinanomachi)



External Links

Career 【 Display / hide

  • 2011.04

    National Cancer Center, がん医療支援研究部 放射線治療品質管理推進室, Researcher

  • 2013.05

    Gunma University, Graduate School of Medicine, Assistant Professor

Academic Background 【 Display / hide

  • 2003.04

    Hiroshima University, Faculty of Science, Department of Physical Science

    Japan, University, Graduated

  • 2007.04

    Hiroshima University, 大学院先端物質科学研究科, 量子物質科学専攻

    Graduate School, Completed, Master's course

  • 2010.04

    Juntendo University, Graduate School of Medicine, がん生涯教育センター

    Japan, Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • 博士(医学), Juntendo University, Coursework, 2014.03

Licenses and Qualifications 【 Display / hide

  • Medical Physicist, 2014.12


Research Areas 【 Display / hide

  • Radiation science


Papers 【 Display / hide

  • Output factor determination based on Monte Carlo simulation for small cone field in 10-MV photon beam

    Kyohei Fukata, Satoru Sugimoto, Chie Kurokawa, Akito Saito, Tatsuya Inoue, Keisuke Sasai

    Radiological physics and technology (Springer Singapore)  11 ( 2 ) 192 - 201 2018.04

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  1865-0333

     View Summary

    The difficulty of measuring output factor (OPF) in a small field has been frequently discussed in recent publications. This study is aimed to determine the OPF in a small field using 10-MV photon beam and stereotactic conical collimator (cone). The OPF was measured by two diode detectors (SFD, EDGE detector) and one micro-ion chamber (PinPoint 3D chamber) in a water phantom. A Monte Carlo simulation using simplified detector model was performed to obtain the correction factor for the detector measurements. About 12% OPF difference was observed in the measurement at the smallest field (7.5 mm diameter) for EDGE detector and PinPoint 3D chamber. By applying the Monte Carlo-based correction factor to the measurement, the maximum discrepancy among the three detectors was reduced to within 3%. The results indicate that determination of OPF in a small field should be carefully performed. Especially, detector choice and appropriate correction factor application are very important in this regard.

  • Three-Dimensional Dosimetry of Carbon Ion Beams by Gel Dosimeters

    Hikaru Souda, Makoto Sakai, Kyohei Fukata, and Takayoshi Ishii

    医学物理 (日本医学物理学会)  37 ( 3 ) 181 - 185 2018.02

    Research paper (scientific journal), Joint Work, Accepted

     View Summary

    A three-dimensional dosimetry method is strongly required in the dose distribution measurement of a patient QA of a heavy ion therapy. Nanocomposite Fricke gel dosimeters are the most possible candidate for this purpose. Experimental dose distribution measurements were carried out using a scanning irradiation port of Gunma University Heavy Ion Medical Center. The result showed no significant LET dependence and indicated a possibility for a precise dosimetry of a heavy ion therapy. It also indicated the importance of three-dimensional dosimetry in the commissioning process of the treatment accelerator.

  • Dose–volume histogram analysis of brainstem necrosis in head and neck tumors treated using carbon-ion radiotherapy

    Katsuyuki Shirai, Kyohei Fukata, Akiko Adachi, Jun-ichi Saitoh, Atsushi Musha, Takanori Abe, Tatsuaki Kanai, Daijiro Kobayashi, Yuka Shigeta, Satoshi Yokoo, Kazuaki Chikamatsu, Tatsuya Ohno, Takashi Nakano

    Radiotherapy and Oncology (Elsevier)   2017.08

    Research paper (scientific journal), Joint Work, Accepted

  • Dosimetric impact of anatomical changes in photon and particle therapy for pancreatic cancer

    K Crama, AC Houweling, J Visser, K Fukata, CRN Rasch, T Ohno, A Bel, A Van der Horst

    Radiotherapy and Oncology (Elsevier)  123 2017.05

    Research paper (international conference proceedings)

  • Clinical outcomes using carbon-ion radiotherapy and dose-volume histogram comparison between carbon-ion radiotherapy and photon therapy for T2b-4N0M0 non-small cell lung cancer—A pilot study

    Katsuyuki Shirai, Motohiro Kawashima, Jun-ichi Saitoh, Takanori Abe, Kyohei Fukata, Yuka Shigeta, Daisuke Irie, Shintaro Shiba, Naoko Okano, Tatsuya Ohno, Takashi Nakano

    PloS one (Public Library of Science)  12 ( 4 ) e0175589 2017.04

    Research paper (scientific journal), Joint Work, Accepted

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Presentations 【 Display / hide

  • Interfractional Motion in Carbon Ion Radiation Therapy for Prostate Cancer Spares Rectum with Little Target Degradation

    D Bridges, H Kawamura, K Fukata, T Kanai

    AAPM2018 (San Antonio, TX, USA) , 2018.07, Oral Presentation(general), American Association of Physicists in Medicine

  • Determination of dosimetric leaf gap and MLC transmission using multi-dimensional detector array

    Kyohei Fukata, Takashi Hanada, Naoyuki Shigematsu

    JSMP115 (神奈川県横浜市) , 2018.04, Oral Presentation(general)

  • OC-0354: Dosimetric impact of anatomical changes in photon and particle therapy for pancreatic cancer

    K Crama, AC Houweling, J Visser, K Fukata, CRN Rasch, T Ohno, A Bel, A Van der Horst

    ESTRO 36 (Vienna, Austria) , 2017.05, Oral Presentation(general), ESTRO

     View Summary


Research Projects of Competitive Funds, etc. 【 Display / hide

  • 機械学習を用いて放射線治療における有害事象の予測精度を向上させる


    MEXT,JSPS, Grant-in-Aid for Scientific Research, 深田 恭平, Grant-in-Aid for Early-Career Scientists , Principal Investigator

Awards 【 Display / hide

  • The 3rd GI-CoRE Symposium Poster Award

    2016.03, GI-CoRE, NTCP parameter of mucositis in Carbon ion radiotherapy


Memberships in Academic Societies 【 Display / hide

  • Japanese Society for Radiation Oncology

  • Japan Society of Medical Physics


Committee Experiences 【 Display / hide

  • 2016.04

    選挙管理委員, 日本医学物理学会