Radiation Oncology Journal

The Korean Society for Radiation Oncology (대한방사선종양학회)
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Dose Distribution in the Brain in Radiotherapy of Whole Brain

전뇌조사시(全腦照射時) 뇌(腦)에 있어서의 선량분포(線量分布)

  • Kang, Wee Saing (Department of Radiology, College of Medicine, Seoul National University) ;
  • Ha, Sung Whan (Department of Radiology, College of Medicine, Seoul National University) ;
  • Park, Charn Il (Department of Radiology, College of Medicine, Seoul National University)
  • 강위생 (서울대학교 의과대학 방사선과학교실) ;
  • 하성환 (서울대학교 의과대학 방사선과학교실) ;
  • 박찬일 (서울대학교 의과대학 방사선과학교실)
  • Published : 1983.10.30
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Abstract

Whole brain irradiation is one mode in the treatment of brain cancer and brain metastasis, but it might cause brain injury such as brain necrosis. It has been studied whether the dose distribution could be a cause of brain injury. The dose distribution in whole brain irradiated by Co-60 beam has been measured by means of calibrated TLD chips inserted in the brain of Humanoid phantom. The following results were obtained. 1. Dose distribution on each transverse section of the brain was uniform. 2. On the midsagital plane of the brain, the dose was highest in upper portion and lowest in lower portion, varying 8 from 104% to 90%. 3. When the radiation field includes free space of 2cm or more width out of the head, the dose distribution in the whole brain is almost independent of the field width. 4. It is important to determine adequate shielding area and to set shielding block exactly in repetition of treatment.

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