Calibration of radiotherapy ionization chambers using Co-60 is outdated and should be replaced by direct calibration in linear accelerator beams

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1118/1.4922710
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  1. National Research Council Canada. Measurement Science and Standards
FormatText
TypeArticle
Journal titleMedical Physics
ISSN0094-2405
Volume42
Issue9
Pages5003–5006
Abstract
Most medical linear accelerators worldwide are calibrated using ionization chambers that are themselves calibrated by a standards laboratory, or secondary standards laboratory, in a Co-60 beam. Because these chambers are actually used to calibrate high-energy x-ray beams, it has been suggested that calibration against Co-60 is outdated and should be replaced by calibration in linear accelerator beams. This is the claim debated in this month’s Point/Counterpoint.
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LanguageEnglish
Peer reviewedYes
NPARC number23000718
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