Feasibility basic study of three-dimensional printed device for head and neck immobilization in radiotherapy

• Project/Area Number: 26460715
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Medical Physics and Radiological Technology
• Research Institution: Tohoku University
• Principal Investigator: Takeda Ken 東北大学, 医学系研究科, 教授 (60312568)
• Co-Investigator(Kenkyū-buntansha): 角谷 倫之 東北大学, 大学病院, 助教 (20604961)
• Co-Investigator(Renkei-kenkyūsha): Sato Kiyokazu 東北大学, 病院・診療技術部, 主任診療放射線技師 (90800144) ; dobashi Suguru 東北大学, 大学院医学系研究科, 助教 (70399806)
• Research Collaborator: Ito Kengo 東北大学, 病院, 助手 (40705076) ; Chiba Mizuki 東北大学, 病院, 助手 (40756441)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
• Keywords: 放射線治療 / 患者補助固定具 / 3Dプリンター / 3Ｄプリンター

Outline of Final Research Achievements

We investigated the feasibility of a three-dimensional (3D) -printed head-and-neck (HN) immobilization device. We prepared a 3D-printed immobilization device (3DID) consisting of a mask and headrest with acrylonitrile-butadiene-styrene resin developed from the computed tomography data obtained by imaging a HN phantom. For comparison, a conventional immobilization device (CID) comprising a thermoplastic mask and headrest was prepared using the same HN phantom. We measured the setup error. Furthermore, we measured the changes in the dose due to the difference in the immobilization device material from the photon of 4 and 6 MV. The positional accuracy of the two devices was almost similar. When the thickness was the same, the dose difference was almost similar at a 50 mm depth. At a 1 mm depth, the 3DID-plate had a 2.9-4.2% lower dose than the CID-plate. This study suggested that the positional accuracy and dosimetric properties of 3DID were almost similar to those of CID.

Research Products

• [Journal Article] Evaluation of the Positional Accuracy and Dosimetric Properties of a Three-dimensional Printed Device for Head and Neck Immobilization (2017)
  • Author(s): Sato K, Takeda K, Dobashi S, Kadoya N, Ito K, Chiba M, Kishi K, Yanagawa I, Jingu K
  • Journal Title: Japanese Journal of Radiological Technology Volume: 73 Issue: 1 Pages: 57-65
  • DOI: 10.6009/jjrt.2017_JSRT_73.1.57
  • NAID: 130005289778
  • ISSN: 0369-4305, 1881-4883
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Positional accuracy valuation of a three dimensional printed device for head and neck immobilisation (2016)
  • Author(s): Sato K, Takeda K, Dobashi S, Kishi K, Kadoya N, Ito K, Chiba M, Jingu K
  • Organizer: European Society for Radiotherapy and Oncology, 35
  • Place of Presentation: Turin, Italy
  • Year and Date: 2016-05-01
• [Presentation] Evaluation of the Positional Accuracy and Dosimetric Properties of a Three-dimensional Printed Device for Head and Neck Immobilization (2016)
  • Author(s): Sato K, Takeda K, Dobashi S, Kishi K, Kadoya N, Yanagawa I
  • Organizer: 日本放射線技術学会第72回総会学術大会
  • Place of Presentation: 横浜市パシフィコ横浜会議センター
  • Year and Date: 2016-04-15
• [Presentation] Positional accuracy valuation of a three dimensional printed device for head and neck immobilization. (2016)
  • Author(s): K. Sato, K. Takeda, S. Dobashi, K. Kishi, N. Kadoya, K. Ito, M. Chiba, K. Jingu.
  • Organizer: European Society for Therapeutic Radiology and Oncology
  • Place of Presentation: Turin, Italy
  • Int'l Joint Research
• [Presentation] Evaluation of the positional accuracy and dosimetric properties of a three-dimensional printed device for head and neck immobilization. (2016)
  • Author(s): K Sato, K Takeda, S Dobashi, K Kishi, N Kadoya, I Yanagawa.
  • Organizer: 第72回日本放射線技術学会総会学術大会
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜市）