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Surface dose perturbation due to air gap between patient and bolus for electron beams
Author(s) -
Sharma S. C.,
Johnson M. W.
Publication year - 1993
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.597079
Subject(s) - electron , bolus (digestion) , materials science , dosimetry , cathode ray , air gap (plumbing) , atomic physics , physics , nuclear medicine , nuclear physics , medicine , composite material , surgery
The effect of air gaps under bolus material on the surface dose for electron beams is investigated. Dose measurements were performed for air gaps from 0.0 to 3.0 cm and bolus thicknesses of 0.5 and 1.0 cm using the various electron energies and cone sizes available on an electron linear accelerator. Our results show that the surface dose decreases for lower electron energies, smaller field sizes, thicker boluses, and larger air gaps.