Carbon Fiber as Material for Radiation Fixation on Device : A comparative study with acrylic

고정기구 재질로써 탄소 섬유와 아크릴의 방사선량 감쇄 영향 비교

  • Chie, Eui-Kyu (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Park, Jang-Pil (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Huh, Soon-Nyung (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Hong, Se-Mie (Department of Radiation Oncology, Konkuk University College of Medicine) ;
  • Park, Suk-Won (Department of Radiology, Chung-Ang University College of Medicine) ;
  • Kim, In-Ah (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Wu, Hong-Gyun (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Kim, Jae-Sung (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Kang, Wee-Saing (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Kim, Il-Han (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Ha, Sung-Whan (Department of Radiation Oncology, Seoul National University College of Medicine) ;
  • Park, Charn-Il (Department of Radiation Oncology, Seoul National University College of Medicine)
  • 지의규 (서울대학교 의과대학 방사선종양학교실) ;
  • 박장필 (서울대학교 의과대학 방사선종양학교실) ;
  • 허순녕 (서울대학교 의과대학 방사선종양학교실) ;
  • 홍세미 (건국대학교 의과대학 방사선종양학교실) ;
  • 박석원 (중앙대학교 의과대학 방사선과학교실) ;
  • 김인아 (서울대학교 의과대학 방사선종양학교실) ;
  • 우홍균 (서울대학교 의과대학 방사선종양학교실) ;
  • 김재성 (서울대학교 의과대학 방사선종양학교실) ;
  • 강위생 (서울대학교 의과대학 방사선종양학교실) ;
  • 김일한 (서울대학교 의과대학 방사선종양학교실) ;
  • 하성환 (서울대학교 의과대학 방사선종양학교실) ;
  • 박찬일 (서울대학교 의과대학 방사선종양학교실)
  • Published : 2005.03.30

Abstract

Radiation absorption parameters of carbon fiber panel were measured in comparison to acrylic panel. $30{\times}30cm$ sized 2mm thick carbon fiber panel and identical sized 6mm thick acrylic panel were placed in tray holder position and 0cm, 5cm, 10cm from surface of phantom. Radiation field size was $10{\times}10cm$. 50MU of 4MV photon was irradiated to the phantom with dose rate of 300MU/min. Source-to-phantom distance was 120cm. Radiation dose was measured with 0.6cc Farmer-type ionization chamber with 1cm build-up. Measurement was repeated thrice and normalization was done to the dose of the open field. Radiation transmission rate of carbon fiber panel is approximately 1% lower than acrylic panel of equivalent thickness. However, considering the strength of the material, transmission rate is higher for carbon fiber panel. Although carbon fiber panel increases the radiation dose when attached to the surface for about 2%, it normalizes the radiation dose to 97-99% of irradiated dose which could have been lowered to as much as 5-7.5% with acrylic panel. As carbon fiber panel is stronger than acrylic panel, radiation fixation device could be made thinner and thus lighter and furthermore, with increased radiation transmission. This in turn makes carbon fiber more ideal material for radiation fixation device over conventionally used acrylic.

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