Progress in Medical Physics (한국의학물리학회지:의학물리)

Korean Society of Medical Physics (한국의학물리학회)
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Dosimetry by Using EBT2 Film for Total Skin Electron Beam Therapy (TSET)

전신 피부 전자선 치료(TSET)에서 EBT2 필름을 사용한 선량측정

  • 황의중 (국립암센터 양성자 치료센터) ;
  • 라정은 (국립암센터 양성자 치료센터) ;
  • 정호진 (국립암센터 양성자 치료센터) ;
  • 안성환 (국립암센터 양성자 치료센터) ;
  • 김동욱 (경희대학교 동서신의학병원 방사선종양학과) ;
  • 이상엽 (국립암센터 양성자 치료센터) ;
  • 임영경 (국립경상대학교병원 방사선종양학과) ;
  • 윤명근 (국립암센터 양성자 치료센터) ;
  • 신동호 (국립암센터 양성자 치료센터) ;
  • 이세병 (국립암센터 양성자 치료센터) ;
  • 박성용 (국립암센터 양성자 치료센터) ;
  • 표홍렬 (서울삼성병원 방사선종양학과) ;
  • 정원규 (경희대학교 동서신의학병원 방사선종양학과)
  • Received : 2010.01.08
  • Accepted : 2010.03.09
  • Published : 2010.03.31
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Abstract

For treatment of Total Skin Electron beam Therapy (TSET), measurement of dose at various conditions is need on the contrary to usual radiotherapy. When treating TSET with modified Stanford technique based on linear accelerator, the energy of treatment electron beam, the spatial dose distribution and the actual doses deposited on the surface of the patient were measured by using EBT2. The measured energy of the electron beam was agreed with the value that measured by ionization chamber, and the spatial dose distribution at the patient position and the doses at several point on the patient's skin could be easily measured by EBT2 film. The dose on the patient that was measured by EBT2 film showed good agreement with the data measured simultaneously by TLD. With the results of this study, it was proven that the EBT2 film can be one of the useful dosimeter for TSET.

전신 피부 전자선 치료(total skin electron beam therapy, TSET)를 위해서는 흔히 행해지는 일반적인 방사선 치료와 달리 치료 전 다양한 조건에서의 선량 측정과 더불어, 치료 중 지속적인 환자 신체부위별 선량 측정이 요구된다. 본 연구에서는 선형 가속기에 기반한 modified Stanford Technique으로 전신 피부 전자선 치료를 할 때 치료에 필요한 치료 전자선의 에너지와 선량의 공간적 분포 및 치료 중 환자의 각 부위별 조사선량을 EBT2 필름을 이용하여 측정 하였다. 전자선의 에너지는 이온전리함으로 측정한 값과 비교하였을 때 잘 일치하였고, 선량의 공간 분포 및 환자 각 신체부위에서의 선량 분포는 EBT2 필름을 이용하여 편리하게 측정할 수 있었다. 또한 TSET 치료중 EBT2 필름을 사용하여 in-vivo로 측정된 환자 신체 부위별 선량분포의 변화는 열형광선량계(thermoluminescent dosimeter, TLD)로 동시에 측정한 값과 비교하였을 때 잘 일치함을 알 수 있었다. 이로써 EBT2 필름의 전신 피부 전자선 치료를 위한 선량계로서의 가능성을 확인하였다.

Keywords

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