Premium
Variations in the beam characteristics of the Varian Clinac‐4 (Pb)
Author(s) -
Jones Douglas,
Shumacher Douglas,
Washington John,
Hilko Robert
Publication year - 1981
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 - 10.1118/1.594963
Subject(s) - reproducibility , nuclear medicine , dosimetry , radiological weapon , range (aeronautics) , beam (structure) , physics , medical physics , optics , medicine , mathematics , materials science , radiology , statistics , composite material
The Northwest Center for Radiological Physics has used a well‐defined protocol in the review of radiotherapy machines. The central axis depth dose and off‐axis factor of fifteen Clinac‐4's are reported. The range in depth dose was on the order of 3.5% and the range in off‐axis factor on the order of 8%. Similar measurements on a Theratron‐80 Cobalt‐60 teletherapy machine are reported to demonstrate the reproducibility of the measurement technique.