Dose measurements for gamma knife with radiophotoluminescent glass dosemeter and radiochromic film

Shih Ming Hsu, Jeng Hung Lee, Fang Yuh Hsu, Hsiu Wen Lee, Shih Kai Hung, Yi Jen Liao, Moon Sing Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Stereotactic radiosurgery (SRS) is designed for patients with small lesion areas that are not suitable for actual surgery. SRS delivers high dose to the lesion with high gradient on the irradiation margin area. In this study, radiophotoluminescent glass dosemeter (RPLGD) and radiochromic film were used to measure the output factor of a gamma knife. Also, a Monte Carlo code (OMEGA/BEAM) was applied to simulate the output factor. For 14 and 8 mm sizes of helmet collimators, the variations of output factors determined with RPLGD, radiochromic film, the Monte Carlo code and Elekta were all within 0.5 %. When helmet collimator size was 4 mm, the output factors detected from RPLGD, radiochromic film and Monte Carlo simulation were all within 3.2 % when compared with Elekta. Taken together, RPLGD, radiochromic film and Monte Carlo simulation will be used as precise tools to measure the output factor of a gamma knife.

Original languageEnglish
Article numberncr164
Pages (from-to)256-259
Number of pages4
JournalRadiation Protection Dosimetry
Volume146
Issue number1-3
DOIs
Publication statusPublished - Jul 2011
Externally publishedYes

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ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology
  • Radiation
  • Public Health, Environmental and Occupational Health

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