Variation in output factor caused by secondary blocking for 7–16 MeV electron beams

Myung C. Choi, James A. Purdy, Bruce Gerbi, Fred G. Abrath, Glenn P. Glasgow

Research output: Contribution to journalLetterpeer-review

18 Scopus citations

Abstract

The effect of secondary blocking on the output factor for 7–16 MeV electron beams is investigated for the two most widely used methods of field shaping, i.e.,(a) shield on surface, and (b) shield at end of cone with subsequent air gap. For these two methods differences in output on the order of 10% are observed. These effects are explained in terms of the blocking geometry and its influence on scattered radiation.

Original languageEnglish (US)
Pages (from-to)137-139
Number of pages3
JournalMedical Physics
Volume6
Issue number2
DOIs
StatePublished - Mar 1979

Keywords

  • BETATRONS
  • COLLIMATORS
  • ELECTRON BEAMS
  • ELECTRON DOSIMETRY
  • LINEAR ACCELERATORS
  • MEV RANGE 01−10
  • MEV RANGE 10−100
  • RADIOTHERAPY
  • SCATTERING
  • SHIELDING MATERIALS
  • SPATIAL DOSE DISTRIBUTION

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