Proceedings of the Korean Society of Medical Physics Conference (한국의학물리학회:학술대회논문집)

Korean Society of Medical Physics (한국의학물리학회)
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Calibration of $^{192}Ir$ HDR Brachytherapy Source in Air and in a Cylindrical Phantom

  • Djarwani S. Soejoko (Physics Department, Faculty of Mathematics and Sciences, University of Indonesia) ;
  • I, Arief-Riva' (Physics Department, Faculty of Mathematics and Sciences, University of Indonesia)
  • Published : 2002.09.01
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Abstract

Two $^{192}$ Ir HDR brachytherapy sources were calibrated with a Farmer ionization chamber in air method and in a PMMA cylindrical phantom. The calibration air method used ionization chamber with buildup cap, and 8 variation distances for center-to-center of the source to chamber. In the optimum distance the measured activity, especially for the high activity source, deviation was 0.3% from the activity provided by manufacturer. Calibration with a PMMA cylindrical phantom was less sensitive, and suitable for quick check method with accuracy less than 10%.

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