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Correction factors for A1SL ionization chamber dosimetry in TomoTherapy: machine-specific, plan-class, and clinical fields.

Authors
  • Gago-Arias, Araceli
  • Rodriguez-Romero, Ruth
  • Sanchez-Rubio, Patricia
  • Miguel Gonzalez-Castano, Diego
  • Gomez, Faustino
  • Nunez, Luis
  • Palmans, Hugo
  • Sharpe, Peter
  • Pardo-Montero, Juan
Type
Published Article
Journal
Medical Physics
Publisher
Wiley (John Wiley & Sons)
Publication Date
Apr 01, 2012
Volume
39
Issue
4
Pages
1964–1970
Identifiers
DOI: 10.1118/1.3692181
PMID: 22482617
Source
Medline
License
Unknown

Abstract

The results indicate that the helical field deliveries in this study (including two clinical fields) do not introduce changes on the ion chamber correction factors for dosimetry. For those two specific clinical cases, ratios of chamber readings accurately represent field output factors. The values observed here for intermediate calibration fields are in agreement with previously published data based on alanine dosimetry but differ from values recently reported obtained via radiochromic dosimetry.

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