3D プリンタで作製した頭頚部放射線治療補助固定具の検討~従来固定具との固定精度および線量特性比較調査~  [in Japanese] Evaluation of the Positional Accuracy and Dosimetric Properties of a Three-dimensional Printed Device for Head and Neck Immobilization  [in Japanese]

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Author(s)

    • 武田 賢 Takeda Ken
    • 東北大学大学院医学系研究科保健学専攻放射線治療学分野 Course of Radiological Technology, Health Sciences, Tohoku University School of Medicine
    • 土橋 卓 Dobashi Suguru
    • 東北大学大学院医学系研究科保健学専攻放射線治療学分野 Course of Radiological Technology, Health Sciences, Tohoku University School of Medicine
    • 角谷 倫之 Kadoya Noriyuki
    • 東北大学大学院医学系研究科放射線腫瘍学分野 Department of Radiation Oncology, Tohoku University School of Medicine
    • 伊藤 謙吾 Ito Kengo
    • 東北大学大学院医学系研究科放射線腫瘍学分野 Department of Radiation Oncology, Tohoku University School of Medicine
    • 千葉 瑞己 Chiba Mizuki
    • 東北大学大学院医学系研究科放射線腫瘍学分野 Department of Radiation Oncology, Tohoku University School of Medicine
    • 岸 和馬 Kishi Kazuma
    • 東北医科薬科大学病院放射線部 Radiological Technology, Tohoku Medical and Pharmaceutical University Hospital
    • 神宮 啓一 Jingu Keiichi
    • 東北大学大学院医学系研究科放射線腫瘍学分野 Department of Radiation Oncology, Tohoku University School of Medicine

Abstract

<p>Our aim was to investigate the feasibility of a three-dimensional (3D) -printed head-and-neck (HN) immobilization device by comparing its positional accuracy and dosimetric properties with those of a conventional immobilization device (CID). 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 CID comprising a thermoplastic mask and headrest was prepared using the same HN phantom. We measured the setup error using the ExacTrac X-ray image system. Furthermore, using the ionization chamber and the water-equivalent phantom, we measured the changes in the dose due to the difference in the immobilization device material from the photon of 4 MV and 6 MV. The positional accuracy of the two devices were almost similar in each direction except in the vertical, lateral, and pitch directions (t-test, p<0.0001), and the maximum difference was 1 mm, and 1°. The standard deviations were not statistically different in each direction except in the longitudinal (F-test, p=0.034) and roll directions (F-test, p<0.0001). 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.</p>

Journal

  • Japanese Journal of Radiological Technology

    Japanese Journal of Radiological Technology 73(1), 57-65, 2017

    Japanese Society of Radiological Technology

Codes

  • NII Article ID (NAID)
    130005289778
  • NII NACSIS-CAT ID (NCID)
    AN00197784
  • Text Lang
    JPN
  • ISSN
    0369-4305
  • NDL Article ID
    027966988
  • NDL Call No.
    Z19-205
  • Data Source
    NDL  J-STAGE 
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