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2012 Fiscal Year Research-status Report

動態下における強度変調放射線治療の安全性に関する基礎的検討

Research Project

Project/Area Number 23791408
Research InstitutionKyoto University

Principal Investigator

中村 光宏  京都大学, 医学(系)研究科(研究院), その他 (30584255)

Keywords呼吸性移動 / 強度変調放射線治療
Research Abstract

呼吸性移動を伴う腫瘍に対して強度変調放射線治療(IMRT)を実施する場合,多葉絞り(MLC)との相互作用により,意図せぬ線量分布となり非動態下における線量分布とは大きく異なる.しかも,その乖離度はMLCの動きやIMRT照射時間内の動態周期・移動量等に依存する.また,同じ動態下であっても照射タイミングの違いにより,様々なIMRT線量分布が存在するため,実測から傾向を読み取ることは困難である.
平成24年度では,MLC位置情報や動態周期・移動量,照射タイミングおよび照射回数等のパラメーターを入力することで,動態下におけるフルエンスマップが作成可能なソフトウェアを開発した.本ソフトウェアはパラメーターを入力するだけで動態下におけるフルエンスマップを作成できることから,IMRT品質保証の判定にも使用でき,その臨床的意義は大きい.
当ソフトウェアを用いて単純なシミュレーションを実行した結果,IMRT照射時間内の動態周期が短く,移動量が小さく,線量率が低いほど,非動態下におけるフルエンスマップとの差異が小さくなる傾向にあった.また,照射回数が多いほど乖離度が小さくなることも明らかとなってきた.
研究最終年度では,様々なパラメーターを入力して得られた動態下におけるフルエンスマップと非動態下におけるフルエンスマップを比較し,統計学的手法等を用いて差異の原因を解明する予定である.また,動態下において安全にIMRTを施行するためのガイドライン原案を策定にも着手する予定である.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

平成24年度に予定していた動態下におけるフルエンスマップ作成ソフトウェアを開発した.

Strategy for Future Research Activity

開発したフルエンスマップ作成ソフトウェアにMLC位置情報や動態周期・移動量,照射タイミングおよび照射回数等のパラメーターを入力して得られた動態下におけるフルエンスマップと非動態下におけるフルエンスマップと比較する.また,フルエンスマップの差異の原因を追究する.また,動態下において安全にIMRTを施行するためのガイドライン原案を策定にも着手する予定である.

Expenditure Plans for the Next FY Research Funding

動態下におけるIMRTの安全性は未だ明らかになっていないため,国内外の学会での情報収集が必要である.このため,旅費が多く必要となる見込みである.これ以外にデータ集積用の消耗品を研究費に用いる予定である.

  • Research Products

    (27 results)

All 2013 2012

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (17 results) (of which Invited: 1 results)

  • [Journal Article] Differences in dose-volumetric data between the analytical anisotropic algorithm and the x-ray voxel Monte Carlo algorithm in stereotactic body radiation therapy for lung cancer2013

    • Author(s)
      Mampuya WA, Matsuo Y, Nakamura A, Nakamura M, Mukumoto N, Miyabe Y, Narabayashi M, Sakanaka K, Mizowaki T, Hiraoka M.
    • Journal Title

      Med Dosim.

      Volume: 38 Pages: 95-9

    • DOI

      10.1016/j.meddos.2012.07.007

    • Peer Reviewed
  • [Journal Article] Differences in the dose-volume metrics with heterogeneity correction status and its influence on local control in stereotactic body radiation therapy for lung cancer2013

    • Author(s)
      Ueki N, Matsuo Y, Shibuya K, Nakamura M, Narabayashi M, Sakanaka K, Norihisa Y, Mizowaki T, Hiraoka M.
    • Journal Title

      J Radiat Res.

      Volume: 54 Pages: 337-43

    • DOI

      10.1093/jrr/rrs084

    • Peer Reviewed
  • [Journal Article] A feasibility study on reduction of the entrance-surface dose to neonates by use of a new digital mobile X-ray system2013

    • Author(s)
      Utsunomiya S, Monzen H, Akimoto M, Mukumoto N, Ishihara Y, Shiinoki T, Nakamura M, Miyabe Y, Sato S, Matsuo S, Hiraoka M.
    • Journal Title

      Radiol Phys Technol.

      Volume: 6 Pages: 157-61

    • DOI

      10.1007/s12194-012-0182-1

    • Peer Reviewed
  • [Journal Article] Interfractional Dose Variations in the Stomach and the Bowels during Breath-hold Intensity-modulated Radiotherapy for Pancreatic Cancer: Implications for a Dose-escalation Strategy2013

    • Author(s)
      Nakamura A, Shibuya K, Nakamura M, Matsuo Y, Shiinoki T, Nakata M, Mizowaki T, Hiraoka M.
    • Journal Title

      Med Phys.

      Volume: 40 Pages: 021701-1-9

    • DOI

      10.1118/1.4773033

    • Peer Reviewed
  • [Journal Article] Evaluation of 4D dose to a moving target with Monte Carlo dose calculation in stereotactic body radiotherapy for lung cancer2013

    • Author(s)
      Matsugi K, Nakamura M, Miyabe Y, Yamauchi C, Matsuo Y, Mizowaki T, Hiraoka M.
    • Journal Title

      Radiol Phys Technol.

      Volume: 6 Pages: 233-40

    • DOI

      10.1007/s12194-012-0193-y

    • Peer Reviewed
  • [Journal Article] Accuracy verification of infrared marker-based dynamic tumor-tracking irradiation using the gimbaled x-ray head of the Vero4DRT (MHI-TM2000)2013

    • Author(s)
      Mukumoto N, Nakamura M, Sawada A, Suzuki Y, Takahashi K, Miyabe Y, Kaneko S, Mizowaki T, Kokubo M, Hiraoka M.
    • Journal Title

      Med Phys.

      Volume: 40 Pages: 041706-1-9

    • DOI

      10.1118/1.4794506.

    • Peer Reviewed
  • [Journal Article] Dosimetric evaluation of the impacts of different heterogeneity correction algorithms on target doses in stereotactic body radiation therapy for lung tumors2012

    • Author(s)
      Narabayashi M, Mizowaki T, Matsuo Y, Nakamura M, Takayama K, Norihisa Y, Sakanaka K, Hiraoka M.
    • Journal Title

      J Radiat Res.

      Volume: 53 Pages: 777-84

    • DOI

      10.1093/jrr/rrs026

    • Peer Reviewed
  • [Journal Article] Positional accuracy of novel x-ray-image-based dynamic tumor-tracking irradiation using a gimbaled MV x-ray head of a Vero4DRT (MHI-TM2000)2012

    • Author(s)
      Mukumoto N, Nakamura M, Sawada A, Takahashi K, Miyabe Y, Takayama K, Mizowaki T, Kokubo M, Hiraoka M.
    • Journal Title

      Med Phys.

      Volume: 39 Pages: 6287-96

    • DOI

      10.1118/1.4754592

    • Peer Reviewed
  • [Journal Article] Optimization of the x-ray monitoring angle for creating a correlation model between internal and external respiratory signals2012

    • Author(s)
      Akimoto M, Nakamura M, Mukumoto N, Yamada M, Ueki N, Matsuo Y, Sawada A, Mizowaki T, Kokubo M, Hiraoka M.
    • Journal Title

      Med Phys.

      Volume: 39 Pages: 6309-15

    • DOI

      10.1118/1.4754648

    • Peer Reviewed
  • [Journal Article] Guidelines for respiratory motion management in radiation therapy2012

    • Author(s)
      Matsuo Y, Onishi H, Nakagawa K, Nakamura M, Ariji T, Kumazaki Y, Shimbo M, Tohyama N, Nishio T, Okumura M, Shirato H, Hiraoka M.
    • Journal Title

      J Radiat Res.

      Volume: - Pages: -

    • Peer Reviewed
  • [Presentation] "Predictive accuracy and baseline drift of IR marker positions in IR-marker-based dynamic tumor tracking with Vero4DRT(MHI-TM2000)2013

    • Author(s)
      Mami Akimoto, Mitsuhiro Nakamura, Nobutaka Mukumoto, Hiroaki Tanabe, Masahiro Yamada, Yukinori Matsuo, Hajime Monzen, Takashi Mizowaki, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      Third International Conference on Real-time Tumor-tracking Radiation Therapy with 4D Molecular Imaging Technique
    • Place of Presentation
      Sapporo
    • Year and Date
      20130207-20130208
  • [Presentation] Four-dimensional Monte Carlo dose calculation method for dynamic tumor tracking irradiation using Vero4DRT2013

    • Author(s)
      Yoshitomo Ishihara, Akira Sawada, Yuki Miyabe, Nobutaka Mukumoto, Mitsuhiro Nakamura, Nami Ueki, Yukinori Matsuo, Takashi Mizowaki, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      Third International Conference on Real-time Tumor-tracking Radiation Therapy with 4D Molecular Imaging Technique
    • Place of Presentation
      Sapporo
    • Year and Date
      20130207-20130208
  • [Presentation] Vero4DRTを用いた動体追尾照射における腫瘍位置予測モデルの精度検証2012

    • Author(s)
      中村光宏、椋本宜学、山田昌弘、矢野慎輔、田邊裕朗、松尾幸憲、溝脇尚志、澤田晃、小久保雅樹、平岡真寛
    • Organizer
      第25回日本放射線腫瘍学会
    • Place of Presentation
      東京
    • Year and Date
      20121123-20121125
  • [Presentation] 教育講演 先端治療機器 Vero4DRT(MHI-TM2000)2012

    • Author(s)
      中村光宏
    • Organizer
      第25回日本放射線腫瘍学会
    • Place of Presentation
      東京
    • Year and Date
      20121123-20121125
  • [Presentation] 加速部分乳房照射における乳房内留置クリップを用いた呼吸性移動量の評価2012

    • Author(s)
      佐藤清香、井上実、中村光宏、坂中克行、吉村通央、藤本隆広、矢野慎輔、山田昌弘、小倉昌和、平岡真寛
    • Organizer
      第25回日本放射線腫瘍学会
    • Place of Presentation
      東京
    • Year and Date
      20121123-20121125
  • [Presentation] Improvement Of Tracking Accuracy With Vero4DRT(MHI-TM2000) Using Phase Shift Correction2012

    • Author(s)
      Mami Akimoto, Mitsuhiro Nakamura, Nobutaka Mukumoto, Masahiro Yamada, Kunio Takahashi, Yukinori Matsuo, Takashi Mizowaki, Akira Sawada, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      54th ASTROAnnual Meeting
    • Place of Presentation
      Boston
    • Year and Date
      20121028-20121031
  • [Presentation] Four-dimensional Monte Carlo Dose Calculation Method for Dynamic Tumor Tracking Irradiation With a Gimbaled X-ray Head2012

    • Author(s)
      Yoshitomo Ishihara, Akira Sawada, Yuki Miyabe, Nobutaka Mukumoto, Mitsuhiro Nakamura, Nami Ueki, Yukinori Matsuo, Takashi Mizowaki, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      54th ASTROAnnual Meeting
    • Place of Presentation
      Boston
    • Year and Date
      20121028-20121031
  • [Presentation] Estimation of a Tracking Margin in Surrogate Signal-based Dynamic Tumor Tracking Irradiation With 4DRT2012

    • Author(s)
      Mitsuhiro Nakamura, Nobutaka Mukumoto, Nami Ueki, Mami Akimoto, Masahiro Yamada, Yukinori Matsuo, Takashi Mizowaki, Akira Sawada, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      54th ASTROAnnual Meeting
    • Place of Presentation
      Boston
    • Year and Date
      20121028-20121031
  • [Presentation] Intra-fractional Tracking Accuracy in Surrogate Signal-based Dynamic Tumor-tracking Irradiation with Vero4DRT (MHI-TM2000)2012

    • Author(s)
      Nobutaka Mukumoto, Mitsuhiro Nakamura, Akira Sawada, Masahiro Yamada, Kunio Takahashi, Yuki Miyabe, Yukinori Matsuo, Takashi Mizowaki, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      54th ASTROAnnual Meeting
    • Place of Presentation
      Boston
    • Year and Date
      20121028-20121031
  • [Presentation] Determination of the Optimal X-Ray Monitoring Angle for Creating a Correlation Model in Dynamic Tumor Tracking Irradiation with Vero4DRT(MHI-TM2000)2012

    • Author(s)
      Mami Akimoto, Mitsuhiro Nakamura, Nobutaka Mukumoto, Masahiro Yamada, Nami Ueki, Yukinori Matsuo, Takashi Mizowaki, Akira Sawada, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      54th AAPM Annual Meeting
    • Place of Presentation
      Charlotte
    • Year and Date
      20120729-20120802
  • [Presentation] Quality assurance of the surrogate signal-based dynamic tumor-tracking irradiation with Vero4DRT (MHI-TM2000)2012

    • Author(s)
      Nobutaka Mukumoto, Mitsuhiro Nakamura, Akira Sawada, Yasunobu Suzuki, Kunio Takahashi, Yuki Miyabe, Shuji Kaneko, Takashi Mizowaki, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      54th AAPM Annual Meeting
    • Place of Presentation
      Charlotte
    • Year and Date
      20120729-20120802
  • [Presentation] Dosimetric validation of the algorithm based on linear Boltzmann transport equations for photon 4MV dose calculation2012

    • Author(s)
      Sayaka Sato, Yuki Miyabe, Manabu Nakata, Yusuke Tsuruta, Mitsuhiro Nakamura, Takashi Mizowaki, Masahiro Hiraoka
    • Organizer
      54th AAPM Annual Meeting
    • Place of Presentation
      Charlotte
    • Year and Date
      20120729-20120802
  • [Presentation] Dosimetric investigation of breath-hold intensity-modulated radiotherapy for pancreatic cancer2012

    • Author(s)
      Mitsuhiro Nakamura, Shun Kishimoto, Kohei Iwamura, Takehiro Shiinoki, Akira Nakamura, Yukinori Matsuo, Keiko Shibuya, Masahiro Hiraoka
    • Organizer
      World Congress Medical Physics and Biomedical Engineering
    • Place of Presentation
      Beijing
    • Year and Date
      20120526-20120531
    • Invited
  • [Presentation] Development of four-dimensional Monte Carlo dose calculation system for dynamic tumor-tracking irradiation with a gimbaled X-ray head2012

    • Author(s)
      Yoshitomo Ishihara, Akira Sawada, Yuki Miyabe, Nobutaka Mukumoto, Mitsuhiro Nakamura, Nami Ueki, Yukinori Matsuo, Takashi Mizowaki, Masaki Kokubo, Masahiro Hiraoka
    • Organizer
      World Congress Medical Physics and Biomedical Engineering
    • Place of Presentation
      Beijing
    • Year and Date
      20120526-20120531
  • [Presentation] 外部呼吸信号方式の動体追尾照射におけるPTVマージン算定2012

    • Author(s)
      中村光宏、椋本宜学、澤田晃、植木奈美、高橋邦夫、矢野慎輔、松尾幸憲、溝脇尚志、小久保雅樹、平岡真寛
    • Organizer
      第103回日本医学物理学会学術大会
    • Place of Presentation
      横浜
    • Year and Date
      20120412-20120415
  • [Presentation] Vero 4DRTを用いた動体追尾照射におけるLog fileおよび透視画像解析による追尾精度検証2012

    • Author(s)
      椋本宜学、中村光宏、澤田晃、宮部結城、高橋邦夫、山田昌弘、松尾幸憲、溝脇尚志、小久保雅樹、平岡真寛
    • Organizer
      第103回日本医学物理学会学術大会
    • Place of Presentation
      横浜
    • Year and Date
      20120412-20120415
  • [Presentation] 金マーカーと外部呼吸信号の相関モデル作成のためのX線透視角度の最適化2012

    • Author(s)
      秋元麻未、中村光宏、澤田晃、椋本宜学、植木奈美、松尾幸憲、金子周史、溝脇尚志、小久保雅樹、平岡真寛
    • Organizer
      第103回日本医学物理学会学術大会
    • Place of Presentation
      横浜
    • Year and Date
      20120412-20120415

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Published: 2014-07-24  

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