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X‐ray depth‐dose characteristics of the Toshiba LMR‐16
Author(s) -
Mantel Joseph,
Perry Harold,
Weinkam James J.
Publication year - 1979
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 - 10.1118/1.594560
Subject(s) - nuclear medicine , dosimetry , medical physics , medicine
The depth‐dose characteristics of the Toshiba LMR‐16 linear accelerator for 14‐MeV x rays have been measured at an SSD of 100 cm using diodes and ion chambers. The surface dose and build‐up depth both exhibit a considerable variation with field size. A new central axis model has been developed which takes account of these variations, and the agreement between the measured and computed data using this model is found to be excellent. Formulas are also presented to estimate the surface dose, buildup depth, and output factor as a function of field size.