CT装置の高精度線量評価に必要な実効エネルギー計測法の研究

• 研究課題/領域番号: 16K21553
• 研究種目: 若手研究(B)
• 配分区分: 基金
• 研究分野: 放射線科学; 医学物理学・放射線技術学
• 研究機関: 川崎医療福祉大学 (2017); 純真学園大学 (2016)
• 研究代表者: 五反田 龍宏 川崎医療福祉大学, 医療技術学部, 准教授 (60711447)
• 研究期間 (年度): 2016-04-01 – 2018-03-31
• 研究課題ステータス: 完了 (2017年度)
• 配分額: 2,470千円 (直接経費: 1,900千円、間接経費: 570千円); 2017年度: 1,170千円 (直接経費: 900千円、間接経費: 270千円); 2016年度: 1,300千円 (直接経費: 1,000千円、間接経費: 300千円)
• キーワード: 実効エネルギー / X線CT / 線量計測用フィルム / GAFCHROMIC EBT3 / スキャナ特性 / GAFCHROMIC Film

研究成果の概要

CT装置の医療被曝を正確に評価するためには，X線束の線質を測定することが重要である．本研究では，いかなる施設においてもCT装置の線質評価を簡易的かつ高精度に評価する方法を開発することを目的としていた．
初年度は，最もエネルギー依存性の低いGAFCHROMIC EBT3が実効エネルギー特性の評価に優れていることが実証された．また，平台型スキャナのスキャン方法が確立された．
最終年度は，CT装置のX線束中心のみの実効エネルギーを計測した．次に，CT装置のX線束全域の実効エネルギーの分布を計測した．本研究では，CT装置の実効エネルギーの2次元分布評価ならびに簡易的計測が可能であることが実証された．

研究成果

• [雑誌論文] Evaluation of effective energy distribution of 320-multidetector CT using GAFCHROMIC EBT3 (2018)
  • 著者名/発表者名: Tatsuhiro Gotanda, Toshizo Katsuda, Rumi Gotanda, Takuya Akagawa, Tadao Kuwano, Nobuyoshi Tanki, Hidetoshi Yatake, Yasuyuki Kawaji, Takashi Amano, Shinichi Arao, Atsushi Ono, Akihiko Tabuchi
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Influence of image resolution property on aliasing error of digital wiener spectrum (2018)
  • 著者名/発表者名: Yasuyuki Kawaji, Tatsuhiro Gotanda, Tetsunori Shimono, Nobuyoshi Tanki, Toshizo Katsuda, Rumi Gotanda, Tadao Kuwano, Takuya Akagawa
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Temporal characterization of the flat-bed scanner influencing dosimetry using radiochromic film (2018)
  • 著者名/発表者名: Rumi Gotanda, Toshizo Katsuda, Tatsuhiro Gotanda, Nobuyoshi Tanki, Hidetoshi Yatake, Yasuyuki Kawaji, Tadao Kuwano, Takuya Akagawa, Akihiko Tabuchi, Atsushi Ono, Shinichi Arao
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Accurately evaluating settling responses of ionization chambers used in radiation therapy depend on the accelerating tube (2018)
  • 著者名/発表者名: Tetsunori Shimono, Yasuyuki Kawaji, Tatsuhiro Gotanda, Rumi Gotanda, Hiroshi Okuda
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Effect of Weight Input in Magnetic Resonance Imaging System on Radio-Frequency-Induced Heating of Metallic Implants (2018)
  • 著者名/発表者名: Atsushi Ono, Shinichi Arao, Satoru Takata, Tatsuhiro Gotanda, Rumi Gotanda, Akihiko Tabuchi
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Optimal Variable Refocus Flip Angle Control Method and Echo Train Length for Suppressing Exposure to Radio Frequency (2018)
  • 著者名/発表者名: Akihiko Tabuchi, Shinichi Arao, Toshizo Katsuda, Atsushi Ono, Tatsuhiro Gotanda, Rumi Gotanda
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Basic study of the imaging conditions on tumor volume measurement using 3D-MR imaging of the liver while patient holds breath (2018)
  • 著者名/発表者名: Shinichi Arao, Akihiko Tabuchi, Yasuhiko Okura, Hajime Harauchi, Atsushi Ono, Tatsuhiro Gotanda, Rumi Gotanda, Akiko Hayashi
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Size and shape of spherical objects on full-field digital mammography and digital breast tomosynthesis images (2018)
  • 著者名/発表者名: Hidetoshi Yatake, Yuka Sawai, Takahiro Kozuka, Yoshihiro Takeda, Mariko Kajihara, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Shuji Abe, Makoto Shimada, Nobuyoshi Tanki, Toshio Nishi, Hideo Inaji
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 68
  • 査読あり
• [雑誌論文] Determining optimum wavelength of ultraviolet rays to pre-exposure of non-uniformity error correction in Gafchromic EBT2 films (2018)
  • 著者名/発表者名: Toshizo KATSUDA, Rumi GOTANDA, Tatsuhiro GOTANDA, Takuya AKAGAWA, Nobuyoshi TANKI, Tadao KUWANO, Atsushi NOGUCHI, Kouichi YABUNAKA
  • 雑誌名: Polish Journal of Medical Physics and Engineering 巻: 24 号: 1 ページ: 11-14
  • DOI: 10.2478/pjmpe-2018-0002
  • 査読あり / オープンアクセス
• [雑誌論文] Influence of scattered radiation on Gafchromic EBT3 (2017)
  • 著者名/発表者名: Tatsuhiro Gotanda, Toshizo Katsuda, Ayano Kawasaki, Rumi Gotanda, Takuya Akagawa, Tadao Kuwano, Nobuyoshi Tanki, Yasuyuki Kawaji, Tetsunori Shimono, Kenyu Yamamoto, Koichi Yabunaka
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 65 ページ: 1037-1040
  • DOI: 10.1007/978-981-10-5122-7_101
  • ISBN: 9789811051210, 9789811051227
  • 査読あり
• [雑誌論文] Intensities of Incident and Transmitted Ultraviolet-A Rays through Gafchromic Films (2017)
  • 著者名/発表者名: Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Tadao Kuwano, Atsushi Noguchi, Kouichi Yabunaka
  • 雑誌名: Journal of Medical Physics 巻: 42 号: 2 ページ: 86-89
  • DOI: 10.4103/jmp.jmp_136_16
  • 査読あり / オープンアクセス
• [雑誌論文] Ultraviolet Ray Strength for Pre-irradiation in Gafchromic EBT2 (2017)
  • 著者名/発表者名: T Katsuda, R Gotanda, T Gotanda, T Akagawa, N Tanki, A Noguchi, T Kuwano, K Yabunaka
  • 雑誌名: IFMBE Proceedings 巻: 65 ページ: 386-389
  • DOI: 10.1007/978-981-10-5122-7_97
  • ISBN: 9789811051210, 9789811051227
  • 査読あり
• [雑誌論文] UV Intensity of Pre-irradiation in Gafchromic XR-RV3 and XR-SP2 (2017)
  • 著者名/発表者名: Tadao Kuwano, Yoshihiro Takeda, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Atsushi Noguchi, Yasuyuki Kawaji, Kenyu Yamamoto, Koichi Yabunaka
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 65 ページ: 53-56
  • DOI: 10.1007/978-981-10-5122-7_14
  • ISBN: 9789811051210, 9789811051227
  • 査読あり
• [雑誌論文] Basic research on countermeasures against barium sulfate aggregation using a gastric phantom (2017)
  • 著者名/発表者名: Kenyu Yamamoto, Naoko Fujiwara, Yoshihiro Takeda, Rena Takakura, Tetsushi Ishida, Toshizo Katsuda, Tadao Kuwano, Misao Yoneda, Tatsuhiro Gotanda, Shuji Abe, Makoto Shimada, Masami Azuma, Sachiko Tanaka
  • 雑誌名: International Fedration Medical and Biological Engineering Proceedings 巻: 65 ページ: 675-678
  • DOI: 10.1007/978-981-10-5122-7_169
  • ISBN: 9789811051210, 9789811051227
  • 査読あり
• [雑誌論文] Effective energy measurement using Radiochromic film: Application of a mobile scanner (2016)
  • 著者名/発表者名: Tatsuhiro Gotanda, Toshizo Katsuda,Rumi Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Tadao Kuwano, Yasuyuki Kawaji, Tetsunori Shimono, Yoshihiro Takeda
  • 雑誌名: Polish Journal of Medical Physics and Engineering 巻: 22(4) 号: 4 ページ: 83-90
  • DOI: 10.1515/pjmpe-2016-0015
  • 査読あり
• [雑誌論文] Simplified method for creating a density-absorbed dose calibration curve for the low dose range from GAFCHROMIC EBT3 film (2016)
  • 著者名/発表者名: Tatsuhiro Gotanda, Toshizo Katsuda,Rumi Gotanda,Tadao Kuwano, Takuya Akagawa, Nobuyoshi Tanki,Akihiko Tabuchi, Tetsunori Shimono, Yasuyuki Kawaji
  • 雑誌名: Journal of Medical Physics 巻: 41 号: 4 ページ: 266-270
  • DOI: 10.4103/0971-6203.195192
  • 査読あり / オープンアクセス
• [学会発表] Evaluation of effective energy distribution of 320-multidetector CT using GAFCHROMIC EBT3 (2018)
  • 著者名/発表者名: Tatsuhiro Gotanda, Toshizo Katsuda, Rumi Gotanda, Takuya Akagawa, Tadao Kuwano, Nobuyoshi Tanki, Hidetoshi Yatake, Yasuyuki Kawaji, Takashi Amano, Shinichi Arao, Atsushi Ono, Akihiko Tabuchi
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Comparison of UV-A sensitivity exposed from front side and backside in Gafchromic XR-RV3: preliminary study (2018)
  • 著者名/発表者名: Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Atsushi Noguchi, Tadao Kuwano, Shinya Imai, Kouichi Yabunaka
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Temporal characterization of the flat-bed scanner influencing dosimetry using radiochromic film (2018)
  • 著者名/発表者名: Rumi Gotanda, Toshizo Katsuda, Tatsuhiro Gotanda, Nobuyoshi Tanki, Hidetoshi Yatake, Yasuyuki Kawaji, Tadao Kuwano, Takuya Akagawa, Akihiko Tabuchi, Atsushi Ono, Shinichi Arao
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Efficient X-ray CT dosimetry procedure using radiochromic film and film-folding type phantom (2018)
  • 著者名/発表者名: Nobuyoshi Tanki, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Hidetoshi Yatake, Yasuyuki Kawaji, Hideki Fujita, Atsushi Noguchi, Tadao Kuwano, Shinya Imai, Takuya Akagawa, Yoshihiro Takeda
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Influence of image resolution property on aliasing error of digital wiener spectrum (2018)
  • 著者名/発表者名: Yasuyuki Kawaji, Tatsuhiro Gotanda, Tetsunori Shimono, Nobuyoshi Tanki, Toshizo Katsuda, Rumi Gotanda, Tadao Kuwano, Takuya Akagawa
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Accurately evaluating settling responses of ionization chambers used in radiation therapy depend on the accelerating tube (2018)
  • 著者名/発表者名: Tetsunori Shimono, Yasuyuki Kawaji, Tatsuhiro Gotanda, Rumi Gotanda, Hiroshi Okuda
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Optimal Variable Refocus Flip Angle Control Method and Echo Train Length for Suppressing Exposure to Radio Frequency (2018)
  • 著者名/発表者名: Akihiko Tabuchi, Shinichi Arao, Toshizo Katsuda, Atsushi Ono, Tatsuhiro Gotanda, Rumi Gotanda
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Effect of Weight Input in Magnetic Resonance Imaging System on Radio-Frequency-Induced Heating of Metallic Implants (2018)
  • 著者名/発表者名: Atsushi Ono, Shinichi Arao, Satoru Takata, Tatsuhiro Gotanda, Rumi Gotanda, Akihiko Tabuchi
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Basic study of the imaging conditions on tumor volume measurement using 3D-MR imaging of the liver while patient holds breath (2018)
  • 著者名/発表者名: Shinichi Arao, Akihiko Tabuchi, Yasuhiko Okura, Hajime Harauchi, Atsushi Ono, Tatsuhiro Gotanda, Rumi Gotanda, Akiko Hayashi
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Size and shape of spherical objects on full-field digital mammography and digital breast tomosynthesis images (2018)
  • 著者名/発表者名: Hidetoshi Yatake, Yuka Sawai, Takahiro Kozuka, Yoshihiro Takeda, Mariko Kajihara, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Shuji Abe, Makoto Shimada, Nobuyoshi Tanki, Toshio Nishi, Hideo Inaji
  • 学会等名: World Congress on Medical Physics & Biomedical Engineering
  • 国際学会
• [学会発表] Development of ultraviolet ray irradiation device for Gafchromic XR-SP2 films (2018)
  • 著者名/発表者名: Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, A Sasaki, Takuya Akagawa, Nobuyoshi Tanki, Atsushi Noguchi, Tadao Kuwano, Koichi Yabunaka
  • 学会等名: European Congress of Radiology 2018
  • 国際学会
• [学会発表] Effective energy evaluation of 320-multidetector CT using Radiochromic Film (2017)
  • 著者名/発表者名: Gotanda T, Katsuda T, Akagawa T, Kawaji Y, Gotanda R, Tanki N, Kuwano T, Shimono T, Tabuchi A
  • 学会等名: European Congress of Radiology 2017
  • 発表場所: オーストリア，ウィーン
  • 年月日: 2017-03-01
  • 国際学会
• [学会発表] Influence of scattered radiation on Gafchromic EBT3 (2017)
  • 著者名/発表者名: Tatsuhiro Gotanda, Toshizo Katsuda, Ayano Kawasaki, Rumi Gotanda, Takuya Akagawa, Tadao Kuwano, Nobuyoshi Tanki, Yasuyuki Kawaji, Tetsunori Shimono, Kenyu Yamamoto, Koichi Yabunaka
  • 学会等名: The joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering (NBC)
  • 国際学会
• [学会発表] Ultraviolet Ray Strength for Pre-irradiation in Gafchromic EBT2 (2017)
  • 著者名/発表者名: Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Atsushi Noguchi, Nobuyoshi Tanki, Tadao Kuwano, Kouichi Yabunaka
  • 学会等名: The joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering (NBC)
  • 国際学会
• [学会発表] UV Intensity of Pre-irradiation in Gafchromic XR-RV3 and XR-SP2 (2017)
  • 著者名/発表者名: Tadao Kuwano, Yoshihiro Takeda, Toshizo Katsuda, Rumi Gotanda, Tatsuhiro Gotanda, Takuya Akagawa, Nobuyoshi Tanki, Atsushi Noguchi, Yasuyuki Kawaji, Kenyu Yamamoto, Koichi Yabunaka
  • 学会等名: The joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering (NBC)
  • 国際学会
• [学会発表] Basic research on countermeasures against barium sulfate aggregation using a gastric phantom (2017)
  • 著者名/発表者名: Kenyu Yamamoto, Naoko Fujiwara, Yoshihiro Takeda, Rena Takakura, Tetsushi Ishida, Toshizo Katsuda, Tadao Kuwano, Misao Yoneda, Tatsuhiro Gotanda, Shuji Abe, Makoto Shimada, Masami Azuma, Sschiko Tanaka
  • 学会等名: The joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering (NBC)
  • 国際学会
• [学会発表] Response characteristics of radiochromic film at CT radiation quality (2017)
  • 著者名/発表者名: Rumi Gotanda, Hitoshi Sato, Erika Nakajima, Kumi Sano, Saki Osumi, Tatsuhiro Gotanda, Takuya Akagawa, Tadao Kuwano, Nobuyoshi Tanki, Toshizo Katsuda
  • 学会等名: The joint conference of the European Medical and Biological Engineering Conference (EMBEC) and the Nordic-Baltic Conference on Biomedical Engineering (NBC)
  • 国際学会
• [学会発表] Temporal characteristic of the scanner influencing dosimetry using radiochromic film (2016)
  • 著者名/発表者名: Gotanda T, Katsuda T, Gotanda R, Akagawa T, Tanki N, Kuwano T, Kawaji Y, Shimono T, Fukuda K，Mizumoto T
  • 学会等名: 1st European Congress of Medical Physics
  • 発表場所: ギリシャ・アテネ
  • 年月日: 2016-09-01
  • 国際学会