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Calorimetric determination of the absorbed dose‐to‐water beam quality correction factor k Q for high‐energy photon beams
Author(s) -
Vatnitsky Stanislav M.,
Siebers Jeffrey V.,
Miller Daniel W.
Publication year - 1995
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 - 10.1118/1.597631
Subject(s) - ionization chamber , beam (structure) , absorbed dose , laser beam quality , dosimetry , photon , calorimeter (particle physics) , optics , physics , atomic physics , ionization , quality (philosophy) , materials science , nuclear physics , nuclear medicine , radiation , laser beams , laser , ion , detector , medicine , quantum mechanics
A method has been developed for measuring photon beam quality correction factors k Q using direct transfer with a water calorimeter. k Q values were measured for beam qualities varying between 6 and 23 MV for a Capintec PR‐06 and a PTW W30001 cylindrical ionization chamber. Measured values were intercompared with published sets of computed k Q values and agreement was found to be within measurement uncertainty (1%, one standard deviation).