determination of irradiation route for lineac-driven dynamic 3d non-coplanar treatment with collison detection between lineac and couch

• Project/Area Number: 15K10009
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Radiation science
• Research Institution: Kyoto College of Medical Science
• Principal Investigator: sawada akira 京都医療科学大学, 医療科学部, 教授 (80543446)
• Co-Investigator(Renkei-kenkyūsha): MORIYAMA Masamitsu 近畿大学, 理工学部, 准教授 (00283953)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 動的照射 / 最適軌道 / 3次元動的回転照射 / 危険度マップ / 動的3次元回転照射 / 動的3次元照射 / 干渉シミュレータ

Outline of Final Research Achievements

For the dynamic 3D rotational irradiation, software having functions to acquire positional parameters of irradiation devices and the treatment couch from the system was implemented. In addition, we devised an algorithm to determine irradiation route from cumulative dose distribution along it. From the 2D map based on the polar coordinates in which the irradiation position of the irradiation radiation from each of the organs created by 3D model and the irradiation position from the radiation source are plotted along the abscissa and the latitude as the ordinate, a risk map indicating the degree of risk of each organ and a search map were generated. It has been observed that the obtained irradiation route works well as expected on the simulator. In addition, we posted paper on each subject regarding quantitative consideration on image quality and exposure dose in the target treatment device and gold marker detection algorithm with high robustness.

Research Products

• [Journal Article] Detection of Spherical Gold Fiducials in kV X-Ray Images Using Intensity-Estimation-Based Method (2018)
  • Author(s): M Kokubo, M Yamada, A Sawada, N Mukumoto, Y Miyabe, T Mizowaki, M Hiraoka
  • Journal Title: International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Volume: 7 Pages: 115-130
  • Peer Reviewed
• [Journal Article] Investigation of Well-Balanced kV X-Ray Imaging Conditions between Skin Dose and Image Noise for Dynamic Tumor Tracking Irradiation (2017)
  • Author(s): T Nakai, A Sawada, H Tanabe, M Sueoka, S Taniuchi, K Takayama, T Shiinoki, Y Ishihara, M Kokubo
  • Journal Title: International Journal of Medical Physics, Clinical Engineering and Radiation Oncology Volume: 6 Pages: 410-420
  • Peer Reviewed
• [Presentation] ABRICATION OF A 3D-PRINTED SHIELDING BLOCK WITH HIGH ACCURACY FOR TOTAL BODY IRRADIATION (2016)
  • Author(s): A Sawada, N Itoh, Y Imataki, M Shintani, M Sueoka, S Taniuchi, M Kokubo
  • Organizer: International conference of medical physics 2016
  • Place of Presentation: Bangkok, Thailand
  • Year and Date: 2016-12-09
  • Int'l Joint Research
• [Presentation] INVESTIGATION OF WELL-BALANCED KV X-RAY IMAGING CONDITIONS BETWEEN SKIN DOSE AND IMAGE NOISE (2016)
  • Author(s): T Nakai, A Sawada, H Tanabe, M Sueoka, S Taniuchi, T Shiinoki, Y Ishihara, M Kokubo
  • Organizer: International conference of medical physics 2016
  • Place of Presentation: Bangkok, Thailand
  • Year and Date: 2016-12-09
  • Int'l Joint Research
• [Presentation] Feasibility Study of Markerless Tracking Using Dual Energy Fluoroscopic Images for Real-Time Tumor-Tracking Radiotherapy System (2016)
  • Author(s): T Shiinoki, A Sawada , T Uehara , Y Yuasa , M Koike , S Kawamura , K Shibuya
  • Organizer: Amedican association of physicists in medicine
  • Place of Presentation: Washington DC, USA
  • Year and Date: 2016-07-31
  • Int'l Joint Research
• [Presentation] Accuracy verification of a collision-detection simulator between treatment unit and patient for dynamic wave arc irradiation (2015)
  • Author(s): Watanabe D, Sawada A, Moriyama M, Kohnoike A, Ishihara Y, Siinoki T, Miyabe Y, Suzuki Y, Mizowaki T, Kokubo M, Hiraoka M
  • Organizer: 15th Asia-Oceania Congress of Medical Physics
  • Place of Presentation: Xi'an, China
  • Year and Date: 2015-11-05
• [Presentation] Dosimetric verification of dynamic tumor tracking intensity modulated radiation therapy (2015)
  • Author(s): Sueoka M, Sawada A, Tanabe H, Okada Y, Taniuchi S, Yamane Y, Okuuchi N, Takayama K, Kokub M
  • Organizer: 15th Asia-Oceania Congress of Medical Physics
  • Place of Presentation: Xi'an, China
  • Year and Date: 2015-11-05
• [Presentation] 放射線治療装置の干渉検知シミュレータの精度検証 (2015)
  • Author(s): Watanabe D, Sawada A, Moriyama M, Kohnoike A, Ishihara Y, Siinoki T, Miyabe Y, Suzuki Y, Mizowaki T, Kokubo M, Hiraoka M
  • Organizer: 第110回日本医学物理学会学術大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2015-09-18
• [Presentation] Effects on the dose distribution due to aging of gafchromic film(EBT3) (2015)
  • Author(s): Watanabe D, Sawada A, Moriyama M, Kohnoike A, Ishihara Y, Siinoki T, Miyabe Y, Suzuki Y, Mizowaki T, Kokubo M, Hiraoka M
  • Organizer: 第109回日本医学物理学会学術大会
  • Place of Presentation: パシフィコ横浜
  • Year and Date: 2015-04-16