Does the photon beam quality factor depend on the type of ionization chamber?

Gunter Christ, Jörg Major, Fridtjof Nüsslin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The photon beam quality factor Q of 6- and 15-MV photon beams has been measured using different types of thimble ionization chambers with various wall, electrode and insulator materials. Some types of chambers seem to overestimate the corresponding Q-value by 0.4% (6 MV) and 0.7% (15 MV), respectively. The effect on the stopping power ratio water to air and on the pertubation correction will be discussed.

Original languageEnglish
Pages (from-to)153-155
Number of pages3
JournalRadiotherapy and Oncology
Volume36
Issue number2
DOIs
StatePublished - Aug 1995
Externally publishedYes

Keywords

  • Ionization dosimetry
  • Photon beam quality factor
  • TPR

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