小児CTにおける深層学習画像再構成を用いた低被ばく撮影法の開発

2022 Fiscal Year Annual Research Report

• Project/Area Number: 19K17173
• Research Institution: Kumamoto University
• Principal Investigator: 永山 泰教 熊本大学, 病院, 助教 (60791762)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: CT被ばく / 深層学習画像再構成法

Outline of Annual Research Achievements

令和4年度は、引き続き深層学習画像再構成（deep-learning reconstruction: DLR）についてファントムを用いた物理画質特性ならびに臨床画像での検証を行った。その結果、腹部CT、胸部CT、頭部CTのいずれにおいてもDLRは従来の逐次近似画像再構成法と比べて画質を損なうことなく被ばく低減を達成できるとのデータが得られた。それらの研究成果は、複数の国際学術誌において原著論文として発表した（AJR Am J Roentgenol. 2022 Aug;219(2):315-324, Eur J Radiol.2022 Apr 1;151:110280, Acad Radiol.2023 Mar;30(3):431-440, Eur Radiol. 2023 May;33(5):3253-3265)。

Research Products

• [Journal Article] Deep learning-based reconstruction can improve the image quality of low radiation dose head CT (2023)
  • Author(s): Nagayama Yasunori、Iwashita Koya、Maruyama Natsuki、Uetani Hiroyuki、Goto Makoto、Sakabe Daisuke、Emoto Takafumi、Nakato Kengo、Shigematsu Shinsuke、Kato Yuki、Takada Sentaro、Kidoh Masafumi、Oda Seitaro、Nakaura Takeshi、Hatemura Masahiro、Ueda Mitsuharu、Mukasa Akitake、Hirai Toshinori
  • Journal Title: European Radiology Volume: 33 Pages: 3253～3265
  • DOI: 10.1007/s00330-023-09559-3
  • Peer Reviewed
• [Journal Article] Lung-Optimized Deep-Learning-Based Reconstruction for Ultralow-Dose CT (2023)
  • Author(s): Goto Makoto、Nagayama Yasunori、Sakabe Daisuke、Emoto Takafumi、Kidoh Masafumi、Oda Seitaro、Nakaura Takeshi、Taguchi Narumi、Funama Yoshinori、Takada Sentaro、Uchimura Ryutaro、Hayashi Hidetaka、Hatemura Masahiro、Kawanaka Koichi、Hirai Toshinori
  • Journal Title: Academic Radiology Volume: 30 Pages: 431～440
  • DOI: 10.1016/j.acra.2022.04.025
  • Peer Reviewed
• [Journal Article] Radiation Dose Reduction for 80-kVp Pediatric CT Using Deep Learning?Based Reconstruction: A Clinical and Phantom Study (2022)
  • Author(s): Nagayama Yasunori、Goto Makoto、Sakabe Daisuke、Emoto Takafumi、Shigematsu Shinsuke、Oda Seitaro、Tanoue Shota、Kidoh Masafumi、Nakaura Takeshi、Funama Yoshinori、Uchimura Ryutaro、Takada Sentaro、Hayashi Hidetaka、Hatemura Masahiro、Hirai Toshinori
  • Journal Title: American Journal of Roentgenology Volume: 219 Pages: 315～324
  • DOI: 10.2214/AJR.21.27255
  • Peer Reviewed
• [Journal Article] Radiation dose optimization potential of deep learning-based reconstruction for multiphase hepatic CT: A clinical and phantom study (2022)
  • Author(s): Nagayama Yasunori、Goto Makoto、Sakabe Daisuke、Emoto Takafumi、Shigematsu Shinsuke、Taguchi Narumi、Maruyama Natsuki、Takada Sentaro、Uchimura Ryutaro、Hayashi Hidetaka、Kidoh Masafumi、Oda Seitaro、Nakaura Takeshi、Funama Yoshinori、Hatemura Masahiro、Hirai Toshinori
  • Journal Title: European Journal of Radiology Volume: 151 Pages: 110280～110280
  • DOI: 10.1016/j.ejrad.2022.110280
  • Peer Reviewed
• [Journal Article] DLRが可能とする低被ばくと高画質の両立 (2022)
  • Author(s): 永山泰教
  • Journal Title: INNERVISION Volume: 37 Pages: 4～5
• [Journal Article] 特集 専攻医1年目で知っておきたいCT 14のこと～指導医からのメッセージ～ これだけは知っておきたい CTの医療被ばく (2022)
  • Author(s): 永山 泰教
  • Journal Title: 臨床画像 Volume: 38 Pages: 12～20
  • DOI: 10.18885/ci.0000001052
• [Presentation] 深層学習画像再構成 に関する研究 (2022)
  • Author(s): 永山泰教
  • Organizer: FCA-Webinar in 熊本・宮崎
  • Invited
• [Presentation] DLRが可能とする低被ばくと高画質の両立 (2022)
  • Author(s): 永山泰教
  • Organizer: Global Standard CT Symposium 2022
  • Invited
• [Presentation] Seeing More with Super-Resolution Deep-Learning CT Reconstruction: Physical Property and Clinical Potential (2022)
  • Author(s): Yasunori Nagayama, Takafumi Emoto, Daisuke Sakabe, Sentaro Takada, Takeshi Nakaura, Yoshinori Funama, Toshinori Hirai
  • Organizer: 第108回 北米放射線学会
  • Int'l Joint Research
• [Presentation] Task-based Image Quality Assessments of Super-Resolution Deep-Learning Reconstruction for Coronary CT Angiography (2022)
  • Author(s): Yasunori Nagayama, Takafumi Emoto, Daisuke Sakabe, Sentaro Takada, Takeshi Nakaura, Yoshinori Funama, Toshinori Hirai
  • Organizer: 第108回 北米放射線学会
  • Int'l Joint Research
• [Presentation] Efficacy of Super-Resolution Deep-Learning Reconstruction for the Assessments of Obstructive Coronary Artery Disease on Coronary CT Angiography (2022)
  • Author(s): Yasunori Nagayama, Takafumi Emoto, Daisuke Sakabe, Sentaro Takada, Takeshi Nakaura, Masafumi Kidoh, Seitaro Oda, Hidetaka Hayashi, Yoshinori Funama, Toshinori Hirai
  • Organizer: 第108回 北米放射線学会
  • Int'l Joint Research
• [Presentation] Improvement of Coronary Stent CT Imaging with Super-Resolution Deep-Learning Reconstruction: An Initial In Vivo Experience (2022)
  • Author(s): Yasunori Nagayama, Takafumi Emoto, Daisuke Sakabe, Sentaro Takada, Takeshi Nakaura, Masafumi Kidoh, Seitaro Oda, Hidetaka Hayashi, Yoshinori Funama, Toshinori Hirai
  • Organizer: 第108回 北米放射線学会
  • Int'l Joint Research