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Dosimetric aspects of the therapeutic photon beams from a dual‐energy linear accelerator
Author(s) -
AlGhazi M. S. A. L.,
Arjune B.,
Fiedler J. A.,
Sharma P. D.
Publication year - 1988
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 - 10.1118/1.596266
Subject(s) - linear particle accelerator , flatness (cosmology) , photon , physics , dosimetry , field size , optics , particle accelerator , nuclear medicine , photon energy , atomic physics , beam (structure) , nuclear physics , medicine , cosmology , quantum mechanics
Parameters of the photon beams (6 and 20 MV) from a dual‐energy linear accelerator (Mevatron‐KD, Siemens Medical Laboratories, CA) are presented. The depth dose characteristics of the photon beams are d max of 1.8 and 3.8 cm and percentage depth dose of 68% and 80% at 10‐cm depth and 100‐cm source–surface distance for a field size of 10×10 cm 2 for 6 and 20 MV, respectively. The 6 and 20 MV beams were found to correspond to nominal accelerating potentials of 4.7 and 17 MV, respectively. The stability of output is within ±1% and flatness and symmetry are within ±3%. These figures compare favorably with the manufacturer's specifications.