Updated on 2025/05/02

写真a

 
TANAKA NOBUKAZU
 
Organization
Faculty of Medical Sciences Department of Health Sciences Assistant Professor
School of Medicine Department of Health Sciences(Concurrent)
Title
Assistant Professor
Contact information
メールアドレス
Tel
0926426696
Profile
教育活動: 学部生を対象とした講義・演習,実験・実習,卒業研究等の指導. 研究活動: 医用ディジタル画像を対象とした撮像手技や画質の評価法に関する研究. 臨床活動: 九州大学病院医療技術部放射線部門における診療放射線技師業務.
External link

Research Areas

  • Life Science / Radiological sciences

Degree

  • Ph.D.

Research History

  • 純真学園大学 保健医療学部 放射線技術科学科 助教 (2013年4月1日-2017年3月31日)   

Research Interests・Research Keywords

  • Research theme: Investigation on imaging technology for ultrasound diagnostic system

    Keyword: ultrasonography, elastography, breast image, imaging technique, image evaluation

    Research period: 2017.4

  • Research theme: Investigation on evaluation for image quality and exposure dose for digital radiographic system

    Keyword: flat panel detector, computed radiography, image quality evaluation, exposure dose, detectability

    Research period: 2008.4

  • Research theme: Investigation on evaluation of characteristics of liquid crystal display

    Keyword: liquid crystal display, image quality evaluation, luminance, gradation characteristic, lighting environment

    Research period: 2007.4

Awards

  • Outstanding Paper Award

    2021.5   Korean Society of Radiological Science Conference (KSRSC) 2021   Korean Society of Radiological Science Conference(KSRSC)2021にて発表を行った「Relationship Between Exposure Index and Detector Performance for an Indirect-Conversion-Type Flat-Panel Detector System」の演題が受賞した.

  • 令和元年度がん研究助成金 奨励賞

    2019.10   公益財団法人福岡県すこやか健康事業団   研究課題として作成・提出した「画像表示装置の画質と視認性の関連性に関する研究」について,審査の結果,奨励賞を受賞し,助成金を受給することとなった.

  • 平成29年度がん研究助成金 奨励賞

    2017.12   公益財団法人福岡県すこやか健康事業団   研究課題として作成・提出した「ディジタルイメージングシステムにおける新しい指標を適用した散乱X線除去用グリッド使用法に関する研究」について,審査の結果,奨励賞を受賞し,助成金を受給することとなった.

Papers

  • Effect of anti‑scatter grids on the image improvement factor in digital radiography for various phantom thicknesses and irradiation fields Reviewed International coauthorship International journal

    Nobukazu Tanaka, Yongsu Yoon

    Physical and Engineering Sciences in Medicine   46 ( 3 )   1187 - 1192   2023.9

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    Digital radiography (DR) is used to acquire digital images with a consistent image brightness under different exposures and in the presence of various anti-scatter grids. This study effectively evaluates the image improvement factor and the conventional physical imaging properties, such as grid selectivity, contrast improvement ratio, and grid exposure factor. Various grids and acrylic phantoms of thicknesses 20 cm and 12 cm were used in this evaluation to simulate the pelvis and lumbar spine, and the cervical spine, respectively. Applied irradiation fields were adjusted according to the simulated body parts. Eight grids (four at 40 cm−1 strip frequency with grid ratios of 6:1, 8:1, 10:1, and 12:1, and four at 60 cm−1 strip frequency with grid ratios of 8:1, 10:1, 12:1, and 14:1) were used in this study. The grid selectivity, contrast improvement ratio, and grid exposure factor increased with higher grid ratios. At a constant grid ratio, these three parameters exhibited higher values at lower strip frequency (40 cm−1) than at higher strip frequency (60 cm−1). The change in the image improvement factor of the simulated cervical spine with respect to the grid was smaller than those of the simulated pelvis and lumbar spine. Our results suggested that the image improvement factor is a useful index for selecting grids according to object thickness at a constant exposure in DR systems.

  • Combination system in advanced image processing for improving image contrast and a conventional row-ratio grid for an indirect flat-panel detector system: An experimental study Reviewed International journal

    Nobukazu Tanaka, Hiroyuki Kuroyanagi

    Physica Medica (European Journal of Medical Physics)   74   40 - 46   2020.6

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    Conventional grids with high grid ratios are not ideal for use in bedside radiography because of the difficulty in maintaining the required alignment. To address this issue, the potential usefulness of a combination system that employs removal processing software for scattered radiation and a conventional grid with a low grid ratio (3:1) for an indirect-conversion-type flat-panel detector system was evaluated by measuring image quality and observer performance. The hypothetical grid ratios for the software were 2:1, 3:1, 6:1, 8:1, and 10:1. The scatter fraction of the combination system was lower than that of the software alone. Significant improvement was observed in the effect of scattered radiation removal up to a hypothetical software grid ratio of 6:1. However, the Wiener spectrum increased (radiographic noise degraded) with an increase in the hypothetical grid ratio. The contrast ratios of the combination system were improved compared to those of the software alone for anthropomorphic chest radiographs. An observer test was also conducted using the contrast-detail phantom. The combination system indicated higher low-contrast detectability compared to the software alone, although there were no statistical differences between the hypothetical grid ratios of 6:1, 8:1, and 10:1 in all combinations of the software alone and the combination system. We concluded that a combination system with software that uses a hypothetical grid ratio of 6:1 or more and a 3:1 conventional grid would be more useful for reducing the scattered radiation component compared to the software alone with a hypothetical higher grid ratio for thicker objects.

  • Effect of readout direction in the edge profile on the modulation transfer function of computed radiographic systems by use of the edge method Reviewed International journal

    Nobukazu Tanaka, Junji Morishita, Norisato Tsuda, Masafumi Ohki

    Radiological Physics and Technology   6 ( 2 )   474 - 479   2013.7

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  • Basic imaging properties of an indirect flat-panel detector system employing irradiation side sampling (ISS) technology for chest radiography: comparison with a computed radiographic system Reviewed International journal

    Nobukazu Tanaka, Yuki Yano, Hidetake Yabuuchi, Tsutomu Akasaka, Masayuki Sasaki, Masafumi Ohki, Junji Morishita

    Radiological Physics and Technology   6 ( 1 )   162 - 169   2013.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  • Investigation of optimum anti-scatter grid selection for digital radiography: physical imaging properties and detectability of low-contrast signals Reviewed International journal

    Nobukazu Tanaka, Kentaro Naka, Aya Saito, Junji Morishita, Fukai Toyofuku, Masafumi Ohki, Yoshiharu Higashida

    Radiological Physics and Technology   6 ( 1 )   54 - 60   2013.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

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Books

  • 医用画像情報学 改訂5版

    分担執筆:田中 延和, 井手口 忠光. 編集:杜下 淳次(Role:Joint author)

    株式会社南山堂  2023.10 

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    Responsible for pages:3章 画像の評価 D ノイズ特性 5 ノイズ特性の測定手順.p.124–p.130   Language:Japanese   Book type:Scholarly book

  • 新・医用放射線技術実験〔基礎編〕 第4版

    分担執筆:田中 延和. 編集者:安部 真治, 小田 叙弘, 小倉 泉, 小山 修司(Role:Joint author)

    共立出版株式会社  2020.12 

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    Responsible for pages:7章 7. 1. 13 散乱線除去グリッドの特性. p.336–p.341   Language:Japanese   Book type:Scholarly book

  • 医用画像検査技術学 改訂4版

    分担執筆:田中 延和, 服部 昭子. 編集:杜下 淳次, 加藤 豊幸(Role:Joint author)

    株式会社南山堂  2020.11 

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    Responsible for pages:3章 一般撮影検査 C 頭部 D 脊椎 E 骨盤. p.63–p.90   Language:Japanese   Book type:Scholarly book

  • 診療放射線技師臨床実習テキスト

    分担執筆:田中 延和. 監修:遠藤 啓吾. 編集:杜下 淳次, 中村 泰彦(Role:Joint author)

    株式会社文光堂  2020.6 

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    Responsible for pages:第3部 臨床実習で学ぶこと 第1章 X線単純撮影 2 耳鼻科系撮影-副鼻腔撮影 3 椎体(頸椎,胸椎,腰椎,全脊椎)撮影 4 頸椎撮影 5 胸椎撮影 6 腰椎撮影 7 全脊椎撮影. p.76–p.82   Language:Japanese   Book type:Scholarly book

  • Handbook of X-ray Imaging: Physics and Technology

    Contributors: Nobukazu Tanaka, Junji Morishita. Editor: Paolo Russo(Role:Joint author)

    CRC Press, Taylor & Francis Group  2017.12 

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    Responsible for pages:Chapter 12: Computed Radiography. p.219-p.238, (Publication date, eBook: December 14, 2017, Hardback: January 5, 2018)   Language:English   Book type:Scholarly book

    The last paragraph of summary. This chapter mainly introduces the characteristics of the CR system with a focus on image quality and detectability. Newer technologies, such as needle-based PSP plates, dual-side reading systems, and line-scanning technology, result in higher image quality. The newer CR system provides excellent diagnostic capabilities coupled with advanced image-processing technology

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Presentations

  • Exposure Index and Image Quality in Abdominal Radiography Using Different Anti-scatter Grids International coauthorship International conference

    Nobukazu Tanaka, Yongsu Yoon, Tadamitsu Ideguchi

    24th Asia-Oceania Congress of Medical Physics (AOCMP) and 22nd Southeast Asia Congress of Medical Physics (SEACOMP)  2024.10 

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    Event date: 2024.10

    Language:English   Presentation type:Poster presentation  

    Venue:The Wembley - A St Giles Hotel Penang   Country:Malaysia  

  • Experimental Study of Correlation between Exposure Index and Noise on Chest Radiography at Different Tube Voltages International coauthorship International conference

    Nobukazu Tanaka, Yongsu Yoon, Tadamitsu Ideguchi

    The 10th Japan-Korea Joint Meeting on Medical Physics  2024.9 

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    Event date: 2024.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  • ディジタルX線撮影システムにおけるMTF評価の注意点:サンプリング間隔とエリアシングの影響

    田中 延和, 杜下 淳次

    第80回日本放射線技術学会総会学術大会  2024.4 

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    Event date: 2024.4

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:パシフィコ横浜   Country:Japan  

  • FPDシステムの撮影条件に関連する線量指標の解析と有効活用

    田中 延和, ユン ヨンス

    医用画像情報学会令和5年度春季(第198回)大会  2024.2 

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    Event date: 2024.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  • Evaluation of Chromaticity of Color Images in Breast Ultrasound Elastography: Effects of Ambient Lighting and LCD settings International conference

    Nobukazu Tanaka, Nozomi Tateishi, Saki Mitarai

    2023 Korean Society of Radiological Science Conference  2023.6 

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    Event date: 2023.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:ハイブリッド開催(Online発表)   Country:Korea, Republic of  

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MISC

  • LIGA微細加工によるX線画像診断システムの角度分散式Air-Gridマイクロメッシュ製作の技術開発(Ⅲ)

    日高 昌則, 野上 大史, 常葉 信生, 大石 明広, 小林 和矢, 横尾 侑典, 田中 延和, 杜下 淳次

    九州シンクロトロン光研究センター 県有ビームライン利用報告書   2020.10

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    Language:Japanese   Publishing type:Internal/External technical report, pre-print, etc.  

  • LIGA微細加工によるX線画像診断システムの角度分散式Air-Gridマイクロメッシュ製作の技術開発

    日高 昌則, 野上 大史, 常葉 信生, 大石 明広, 小林 和矢, 田中 延和, 杜下 淳次

    九州シンクロトロン光研究センター 県有ビームライン利用報告書   2020.10

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    Language:Japanese   Publishing type:Internal/External technical report, pre-print, etc.  

  • LIGA微細加工によるX線画像診断システムの角度分散式Air-Gridマイクロメッシュ製作の技術開発(Ⅱ)

    日高 昌則, 野上 大史, 常葉 信生, 大石 明広, 小林 和矢, 横尾 侑典, 田中 延和, 杜下 淳次

    九州シンクロトロン光研究センター 県有ビームライン利用報告書   2020.10

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    Language:Japanese   Publishing type:Internal/External technical report, pre-print, etc.  

Professional Memberships

  • European Society of Radiology

  • Medical Imaging and Information Sciences

  • Japan Society of Medical Physics

  • Japanese Society of Radiological Technology

Committee Memberships

  • 公益社団法人 日本放射線技術学会   代議員   Domestic

    2024.6 - 2026.6   

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    Committee type:Academic society

  • 公益社団法人 日本放射線技術学会   代議員   Domestic

    2018.7 - 2020.7   

Academic Activities

  • 座長

    Role(s): Panel moderator, session chair, etc.

    第19回九州放射線医療技術学術大会 画質評価 (シーガイアコンベンションセンター)  2024.12

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    Type:Competition, symposium, etc. 

  • 座長

    Role(s): Panel moderator, session chair, etc.

    医用画像情報学会令和5年度春季(第198回)大会 Session C  ( Japan ) 2024.2

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    Type:Competition, symposium, etc. 

  • 座長

    Role(s): Panel moderator, session chair, etc.

    日本放射線技術学会第79回総会学術大会 CT,単純X線 機械学習・深層学習/判別・検知  ( Japan ) 2023.4

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    Type:Competition, symposium, etc. 

  • Screening of academic papers International contribution

    Role(s): Peer review

    2023

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    Type:Peer review 

    Number of peer-reviewed articles in foreign language journals:2

    Number of peer-reviewed articles in Japanese journals:2

  • 座長

    Role(s): Panel moderator, session chair, etc.

    第17回九州放射線医療技術学術大会 画像工学3 画像評価/深層学習(GAN)  ( Japan ) 2022.11

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    Type:Competition, symposium, etc. 

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Research Projects

  • 深層学習による線量指標を用いた画質管理の基礎的研究

    Grant number:20K16792  2020 - 2024

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Early-Career Scientists

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    Authorship:Principal investigator  Grant type:Scientific research funding

  • LIGA微細加工によるX線画像診断システムの角度分散式Air-Gridマイクロメッシュ製作の技術開発

    2019.11

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid) 

  • ディジタルX線画像システムの画質と撮影関連データの有効利用に関する研究

    2019.3 - 2024.3

    Joint research

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Other funds from industry-academia collaboration

  • 令和元年度がん研究助成金/画像表示装置の画質と視認性の関連性に関する研究.(2021年度まで)

    2019

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    Grant type:Donation

  • 課題解決型高度医療人材養成プログラム「実践能力強化型チーム医療加速プログラム」

    2017.4 - 2019.3

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    Authorship:Coinvestigator(s) 

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Educational Activities

  • 医学部保健学科放射線技術科学専攻の学部生を対象とした講義・演習,実習・実験,卒業研究等の指導を担当.

Class subject

  • 放射化学実験

    2025.6 - 2025.8   Summer quarter

  • 画像解剖学演習Ⅱ

    2025.6 - 2025.8   Summer quarter

  • 卒業研究

    2025.4 - 2026.3   Full year

  • 放射線技術科学入門Ⅰ

    2025.4 - 2025.9   First semester

  • 放射線計測学実験

    2025.4 - 2025.9   First semester

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FD Participation

  • 2025.3   Role:Participation   Title:令和6年度全学FD M2B講習会(2025年3月17日)

    Organizer:University-wide

  • 2024.9   Role:Participation   Title:医学部保健学科FD 教育におけるハラスメント(2024年9月12日)

    Organizer:Undergraduate school department

  • 2024.4   Role:Participation   Title:大学教職員職能開発FD ⽣成AIを大学の教育・学習・業務にどのように組み込むか?-第一弾 生成AIを使った授業デザイン支援のアイデア-(2024年4月26日)

    Organizer:University-wide

  • 2024.3   Role:Participation   Title:令和5年度全学FD M2Bシステムの使い方(2024年3月8日)

    Organizer:University-wide

  • 2024.3   Role:Participation   Title:医学部・医学系学府合同教育FD 大学病院の苦悩と医学研究の課題(2024年3月6日)

    Organizer:[Undergraduate school/graduate school/graduate faculty]

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Participation in international educational events, etc.

  • 2024.11

    九州大学大学院医学研究院保健学部門

    第19回九州大学保健学国際フォーラム(2023年11月24日)

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    Venue:日本・福岡

  • 2024.6

    iDSRI UM-KU committee

    5th Symposium on Intelligent Data Science for Radiological Imaging (iDSRI) between Universiti Malaya and Kyushu University (June 10, 2024)

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    Venue:Online (Japan・Fukuoka,Malaysia・Kuala Lumpur)

  • 2024.3

    九州大学大学院医学研究院

    第7回医系地区国際フォーラム(2024年3月22日)

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    Venue:日本・福岡

  • 2023.12

    Hacettepe Uiniversity and Kyushu University

    International Symposium on Radiation in Oncology between Hacettepe Uiniversity and Kyushu University (December 13, 2023)

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    Venue:Turkey・Ankara(Online: Japan・Fukuoka)

  • 2023.11

    九州大学大学院医学研究院保健学部門

    第18回九州大学保健学国際フォーラム(2023年11月24日)

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    Venue:日本・福岡

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Other educational activity and Special note

  • 2024  Class Teacher  学部

  • 2023  Class Teacher  学部

  • 2021  Class Teacher  学部

  • 2020  Class Teacher  学部

  • 2019  Class Teacher  学部

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Outline of Social Contribution and International Cooperation activities

  • 公益社団法人日本放射線技術学会 2019・2020年度代議員(任期:2018年7月31日~次回代議員選挙終了まで)

Social Activities

  • 第16回九州大学医学部保健学科公開講座 講演「最新のX線画像検査」

    九州大学医学部保健学科  九州大学病院キャンパス医学部保健学科棟  2018.9

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    Audience:General, Scientific, Company, Civic organization, Governmental agency

    Type:Lecture

  • 平成30年度大学セミナー「保健学を学ぶ学生とその進路」

    福岡県立明善高等学校  2018.7

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    Audience:Infants, Schoolchildren, Junior students, High school students

    Type:Seminar, workshop

Travel Abroad

  • 2024.10

    Staying countory name 1:Malaysia   Staying institution name 1:24th Asia-Oceania Congress of Medical Physics (AOCMP) and 22nd Southeast Asia Congress of Medical Physics (SEACOMP) (October 10th - 13th, 2024)

  • 2023.11 - 2023.12

    Staying countory name 1:Thailand   Staying institution name 1:Mahidol University (November 27th - December 1st, 2023)

Notable Clinical Activities

  • 九州大学病院医療技術部放射線部門における診療放射線技師業務(週1日).