Premium
Corrections to megavoltage depth‐dose values due to reduced backscatter thickness
Author(s) -
Goede Myron R.,
Anderson David W.,
McCray Ken L.
Publication year - 1977
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 - 10.1118/1.594308
Subject(s) - backscatter (email) , imaging phantom , materials science , field size , optics , dosimetry , irradiation , nuclear medicine , beam (structure) , physics , medicine , nuclear physics , computer science , telecommunications , wireless
Multiplicative corrections for percent depth‐dose values were measured for situations with nonmaximal backscatter because of reduced thickness of the irradiated phantom. Data were obtained for common clinical field sizes for a 60 Co beam as well as beams from a 2.5‐MV and a 4.0‐MV generator. Functional forms, which summarize the results and include field size effects, depth, and the thickness of the backscatter medium as variables, were obtained by regression analysis.