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X‐ray beam characteristics of the Varian Clinac 6‐100 linear accelerator
Author(s) -
Coffey Charles W.,
Beach J. Larry,
Thompson Donald J.,
Mendiondo Marta
Publication year - 1980
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 - 10.1118/1.594831
Subject(s) - linear particle accelerator , field size , flatness (cosmology) , dosimetry , optics , wedge (geometry) , beam (structure) , physics , field (mathematics) , nuclear medicine , materials science , mathematics , medicine , cosmology , quantum mechanics , pure mathematics
Beam characteristics and dosimetry measurements of the 6 MV x‐ray beam from a Varian Associates Clinac ® 6‐100 linear accelerator are presented. Percentage depth dose tables are given as a function of field size for square fields. Tissue‐maximum ratios and scatter‐maximum ratios are tabulated as a function of depth and field size. Investigation of surface dose and depth of maximum dose reveal a dependence on field size. Other beam parameters measured and presented include field flatness, symmetry, SSD dependence, and penumbra. Treatment planning parameters including field size output factors and wedge factors are discussed.