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Research on appropriate utilization of imaging in Japan

Research Project

Project/Area Number 16K19176
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Medical sociology
Research InstitutionJuntendo University

Principal Investigator

Kumamaru Kanako  順天堂大学, 医学部, 准教授 (30740451)

Research Collaborator Sano Yukiko  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords画像診断 / ガイドライン / 適正使用 / データベース / 被ばく / 大規模データベース / MRI / 画像検査 / 検査適応 / 放射線診断
Outline of Final Research Achievements

In a national-level claims database, we identified 14,819 non-elderly patients (mean age: 38.7 years) who visited clinics/hospitals for low back pain. Among them, patients visiting facilities without a full-time radiologist were significantly (p<0.001) more likely to undergo acute-period MRI (not recommended by guidelines) than those visiting facilities with at least 1 radiologist partially managing imaging workflow (adjusted odds ratio of 2.93).
By targeting these facilities, we performed a pilot study which intervened referring physicians before completing MRI orders, by showing them guidelines. the intervention reduced the number of inappropriate lumbar MRI.

Academic Significance and Societal Importance of the Research Achievements

近年、画像機器の低価格化や撮像の高速化、訴訟に備えた防衛的医療、外来の出来高払いシステム、日本では特に機器がふんだんにあり待機時間が短い(稼働CT・MRI機器数は米国の3倍以上)などの社会背景により、検査前確率が低く本来適応とならない患者への画像検査の頻用が目立つ。検査適応の教育や是正は放射線科医が担うべきであるが、日本では世界に比べ突出して放射線科医の充足度が低く、CT・MRI装置の6-7割は放射線科医不在のもと稼働している。よって「正しい適応の検査が医療現場で自律的に実施される仕組み」の導入が現在の日本には不可欠である。本研究結果は、その実践に向けた基礎的資料を提供する。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (16 results)

All 2019 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results) Presentation (13 results) (of which Int'l Joint Research: 4 results,  Invited: 11 results)

  • [Journal Article] Large hospital variation in the utilization of Post-procedural CT to detect pulmonary embolism/Deep Vein Thrombosis in Patients Undergoing Total Knee or Hip Replacement Surgery: Japanese Nationwide Diagnosis Procedure Combination Database Study2019

    • Author(s)
      Kumamaru Kanako K.、Kumamaru Hiraku、Yasunaga Hideo、Matsui Hiroki、Omiya Toshinobu、Hori Masaaki、Suzuki Michimasa、Wada Akihiko、Kamagata Koji、Takamura Tomohiro、Irie Ryusuke、Nakanishi Atsushi、Aoki Shigeki
    • Journal Title

      The British Journal of Radiology

      Volume: 92 Issue: 1097 Pages: 0-0

    • DOI

      10.1259/bjr.20180825

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Global and Japanese regional variations in radiologist potential workload for computed tomography and magnetic resonance imaging examinations2018

    • Author(s)
      Kumamaru Kanako K.、Machitori Akihiro、Koba Ritsuko、Ijichi Shinpei、Nakajima Yasuo、Aoki Shigeki
    • Journal Title

      Japanese Journal of Radiology

      Volume: 36 Issue: 4 Pages: 273-281

    • DOI

      10.1007/s11604-018-0724-5

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Radiologist involvement is associated with reduced use of MRI in the acute period of low back pain in a non-elderly population2017

    • Author(s)
      Kumamaru Kanako K.、Sano Yukiko、Kumamaru Hiraku、Hori Masaaki、Takamura Tomohiro、Irie Ryusuke、Suzuki Michimasa、Hagiwara Akifumi、Kamagata Koji、Nakanishi Atsushi、Aoki Shigeki
    • Journal Title

      European Radiology

      Volume: 28 Issue: 4 Pages: 1600-1608

    • DOI

      10.1007/s00330-017-5086-3

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 医療被ばく管理~最近の動向~2019

    • Author(s)
      隈丸加奈子
    • Organizer
      第19回日本術中画像情報学会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] バリュー・ベースド・ケア(価値ベースの医療)の実現に向けた新しい時代の画像診断の意義2019

    • Author(s)
      隈丸加奈子
    • Organizer
      2025年ヘルステック未来予想図を考える第1回
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Standardisation and optimisation of referral/indication (CDS) and Japan-QIBA in Japan2018

    • Author(s)
      Kumamaru KK, Aoki S
    • Organizer
      ECR2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Value Based Imaging in the New Era of Healthcare Systems2018

    • Author(s)
      Kumamaru KK
    • Organizer
      第54回日本医学放射線学会秋季臨床大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] データが拓く次世代医療イノベーション2018

    • Author(s)
      隈丸加奈子
    • Organizer
      Hitachi Social Innovation Forum 2018 TOKYO
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 医療経済の視点から欧米と日本の心臓CT・MRIを考える2017

    • Author(s)
      隈丸加奈子
    • Organizer
      第27回心血管画像動態学会
    • Place of Presentation
      三重
    • Year and Date
      2017-01-20
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Japan Safe Radiology2017

    • Author(s)
      Kumamaru KK
    • Organizer
      The 103nd Scientific Assembly & Annual Meeting of the Radiological Society of North America
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 画像検査のChoosing Wisely2017

    • Author(s)
      Kumamaru KK
    • Organizer
      第15回千葉県放射線技術フォーラム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Value-based Radiologyの現在・未来2017

    • Author(s)
      Kumamaru KK
    • Organizer
      第53回日本医学放射線学会秋季臨床大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Appropriate Utilization and Economics of Non-invasive Cardiovascular Imaging: Today and Future2017

    • Author(s)
      Kumamaru KK
    • Organizer
      11th Congress of Asian Society of Cardiovascular Imaging
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 放射線科医の立場から-画像診断の適切な使用について-2017

    • Author(s)
      Kumamaru KK
    • Organizer
      第151回日本医学会シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Association between Repeat MR Imaging for Benign Lumbar/Cervical Conditions and Imaging Management Fee: An Analysis of Japanese Health Insurance Claims Database2016

    • Author(s)
      Kumamaru KK, Sano Y, Suzuki M, Hori M, Kamagata K, Nakanishi A, Irie R, Aoki S
    • Organizer
      RSNA 102nd Scientific Assembly and Annual Meeting
    • Place of Presentation
      米国シカゴ
    • Year and Date
      2016-11-27
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 若年・壮年患者の良性腰椎疾患に対する「早期」MRI検査頻度と病院因子:大規模レセプトデータベース解析2016

    • Author(s)
      佐野由起子, 隈丸加奈子, 鈴木通真, 堀正明, 入江隆介, 中西淳, 青木茂樹
    • Organizer
      第44回日本磁気共鳴医学会大会
    • Place of Presentation
      埼玉
    • Year and Date
      2016-09-09
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-01-27  

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