The study of dosimetric characteristics for flattening filter free beams

• Project/Area Number: 15K19204
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Medical Physics and Radiological Technology
• Research Institution: Kyoto Prefectural University of Medicine (2016-2017); Kobe University (2015)
• Principal Investigator: Ogata Toshiyuki 京都府立医科大学, 医学(系)研究科(研究院), 助教 (90460576)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: フラットニングフィルターフリー / フラットニングフィルター充填 / 強度変調放射線治療 / 体幹部定位放射線治療 / 医学物理学 / 肝臓定位放射線治療 / 極性効果 / 電離箱 / 頭頸部がん強度変調放射線治療

Outline of Final Research Achievements

Flattening filter free (FFF) beams have recently been employed in commercial C-arm linear accelerators. The purpose of this study was to investigate the differences in the dose distribution and dosimetric parameters between FFF and flattening filter (FF) beams. Our data provides several insights into the different dosimetric parameters of FFF and FF beams.

Research Products

• [Journal Article] Identification of the suitable leaf margin for liver stereotactic body radiotherapy with flattening filter-free beams (2017)
  • Author(s): Ogata T, Nishimura H, Mayahara H, Uehara K, Okayama T.
  • Journal Title: Medical dosimetry Volume: 42 Issue: 4 Pages: 268-272
  • DOI: 10.1016/j.meddos.2017.06.002
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Polarity correction factor for flattening filter free photon beams in several cylindrical ionization chambers. (2016)
  • Author(s): Toshiyuki Ogata, Kazuyuki Uehara, Masao Nakayama, Shinji Tsudou, Takashi Masutani, Takanobu Okayama
  • Journal Title: Radiological Physics and Technology Volume: 9 Issue: 2 Pages: 187-192
  • DOI: 10.1007/s12194-016-0348-3
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A Dosimetric Comparison of Volumetric Modulated Arc Therapy (VMAT) with Unflattened Beams to VMAT with Flattened Beams and TomoTherapy for Head and Neck Cancer (2016)
  • Author(s): Toshiyuki Ogata, Hideki Nishimura, Hiroshi Mayahara, Aya Harada, Yoshiro Matsuo, Masao Nakayama, Kazuyuki Uehara, Shinji Tsudou, Yasuo Ejima, Ryohei Sasaki, Takanobu Okayama
  • Journal Title: Journal of Nuclear Medicine and Radiation Therapy Volume: 7 Issue: 01 Pages: 274-274
  • DOI: 10.4172/2155-9619.1000274
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 画像誘導放射線治療における医工連携 (2018)
  • Author(s): 尾方俊至
  • Organizer: 第21 回 関西 Radiology Update 講演会
  • Invited
• [Presentation] MVCT (2016)
  • Author(s): 尾方 俊至
  • Organizer: 日本医学物理学会サマーセミナー
  • Place of Presentation: グリーンピアせとうち
  • Year and Date: 2016-09-01
  • Invited
• [Presentation] Identification of the appropriate leaf margin for liver stereotactic body radiotherapy with flattening filter free beams (2015)
  • Author(s): 尾方俊至、西村英輝、馬屋原博、上原和之、中山雅央、津藤真司、枡谷隆史、上薗玄、原田文、橋本直樹、岡山貴宣
  • Organizer: 日本放射線腫瘍学会
  • Place of Presentation: ベイシア文化ホール・前橋商工会議所会館
  • Year and Date: 2015-11-21
• [Presentation] Flattening filter freeビームにおける電離箱の極性効果の検討 (2015)
  • Author(s): 尾方俊至、上原和之、枡谷隆史、中山雅央、津藤真司、岡山貴宣
  • Organizer: 日本放射線技術学会
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2015-04-17