Development of inexpensive and simple quantitative evaluation system for radiation dermatitis

• Project/Area Number: 18K07638
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 52040:Radiological sciences-related
• Research Institution: Kyoto Prefectural University of Medicine
• Principal Investigator: Suzuki Gen 京都府立医科大学, 医学(系)研究科(研究院), 准教授 (80279182)
• Co-Investigator(Kenkyū-buntansha): 増井 浩二 京都府立医科大学, 医学(系)研究科(研究院), 客員講師 (20783830) ; 山崎 秀哉 京都府立医科大学, 医学(系)研究科(研究院), 教授 (50301263) ; 武中 正 京都府立医科大学, 医学(系)研究科(研究院), 助教 (80626771)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2020: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2018: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: 放射線皮膚炎 / 乳癌術後照射 / ソフトウェア / 乳房温存療法 / 全乳房照射 / 乳癌術後 / 色素 / 定量的評価

Outline of Final Research Achievements

We investigated the correlation between dosimetry parameters and acute radiation dermatitis in breast cancer patients who received postoperative radiation therapy, and confirmed the usefulness of the parameters.
In patients who received postoperative radiotherapy after breast-conserving surgery, quantitative evaluation of radiation dermatitis over time revealed that the change in skin tone progressed linearly during the irradiation period.
We tried to create software to predict radiation dermatitis from digital camera images, but it was difficult to capture accurate color changes from digital cameras.

Academic Significance and Societal Importance of the Research Achievements

これまで放射線皮膚障害の評価が"主観的"であることに問題提議は行われてこなかった。このため、コンセンサスの得られた放射線皮膚炎の"客観的"評価方法は存在しない。本研究はデジカメを用いて安価に簡便に放射線皮膚炎の定量評価を試み、世界初の皮膚炎の重症度予測可能なソフトウェア開発を目指した。症例ごとのデータのばらつきが予想外に大きく、ソフトウェア開発までに至らなかったが、色彩色素計を用いた実測値とデジカメ画像から抽出した一部の色データ(b*)に相関がみられ、今後、b*値をどのようにソフト開発に結び付けるかが課題である。本研究は、今後の放射線皮膚炎研究の発展に期待がもてる成果を得た。

Research Products

• [Journal Article] Definitive Radiotherapy for Penoscrotal Extramammary Paget’s Disease: A Case Report with Long-Term Follow-Up (2021)
  • Author(s): Suzuki Gen、Machida Kazutaka、Asato Akito、Seri Sho、Ikemoto Chika、Yamazaki Hideya、Yamada Kei、Katsumori Tetsuya
  • Journal Title: Clinical Medicine Insights: Case Reports Volume: 14 Pages: 1-4
  • DOI: 10.1177/11795476211009251
  • Peer Reviewed / Open Access
• [Journal Article] Comparison of Three Fractionation Schedules in Radiotherapy for Early Glottic Squamous Cell Carcinoma (2020)
  • Author(s): SUZUKI GEN、YAMAZAKI HIDEYA、AIBE NORIHIRO、MASUI KOJI、SHIMIZU DAISUKE、KIMOTO TAKUYA、NISHIMURA TAKESHI、KAWABATA KANAKO、NAGASAWA SHINSUKE、MACHIDA KAZUTAKA、YOSHINO YUKI、WATANABE SHO、SUGIYAMA YOICHIRO、ARAI AKIHITO、HIRANO SHIGERU、YAMADA KEI
  • Journal Title: In Vivo Volume: 34 Issue: 5 Pages: 2769-2774
  • DOI: 10.21873/invivo.12101
  • Peer Reviewed / Open Access
• [Journal Article] Is there clinical meaningful threshold in dose volume analysis between grade 0‐2 and 3‐4 radiation dermatitis? (2020)
  • Author(s): Yamazaki Hideya、Suzuki Gen、Takenaka Tadashi、Yoshida Ken
  • Journal Title: Head & Neck Volume: 42 Issue: 8 Pages: 2217-2218
  • DOI: 10.1002/hed.26115
  • Peer Reviewed
• [Journal Article] Objective and quantitative assessment in acute radiation-induced skin toxicity: Way to overcome the barriers? (2020)
  • Author(s): Yamazaki Hideya、Suzuki Gen、Takenaka Tadashi、Aibe Norihiro、Yoshida Ken
  • Journal Title: Radiotherapy and Oncology Volume: 151 Pages: 304-305
  • DOI: 10.1016/j.radonc.2020.08.018
  • Peer Reviewed
• [Journal Article] Correlation Between Dosimetric Parameters and Acute Dermatitis of Post-operative Radiotherapy in Breast Cancer Patients (2018)
  • Author(s): TAKENAKA TADASHI、YAMAZAKI HIDEYA、SUZUKI GEN、AIBE NORIHIRO、MASUI KOJI、SHIMIZU DAISUKE、NISHIMURA TAKESHI、NAKASHIMA AKIHIRO、OGATA TOSHIYUKI、MATSUSHITA KEIICHIRO、YOSHIDA KEN、YAMADA KEI
  • Journal Title: In Vivo Volume: 32 Issue: 6 Pages: 1499-1504
  • DOI: 10.21873/invivo.11406
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Comparison of radiation dermatitis between hypofractionated and conventionally fractionated postoperative radiotherapy: objective, longitudinal assessment of skin color. (2018)
  • Author(s): Yamazaki H, Takenaka T, Aibe N, Suzuki G, Yoshida K, Nakamura S, Masui K, Kimoto T, Sasaki N, Nishimura T, Nakashima A, Goto M, Yamada K.
  • Journal Title: Sci Rep. Volume: 8 Issue: 1 Pages: 12306-12306
  • DOI: 10.1038/s41598-018-30710-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Endoscopic submucosal dissection followed by chemoradiotherapy for superficial esophageal cancer (2019)
  • Author(s): 鈴木弦
  • Organizer: 第7８回日本医学放射線学会総会
• [Remarks] 京都府立医科大学放射線科ホームページ 業績
  • URL: http://www.f.kpu-m.ac.jp/k/radiol/class/archive.html
• [Remarks] research gate
  • URL: https://www.researchgate.net/profile/Gen-Suzuki-3