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Characterization of an in vivo diode dosimetry system for clinical use
Kai Huang1, William S Bice, Oscar Hidalgo-Salvatierra
1Department of Physics & Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA. khuang1@lsu.edu
Journal of Applied Clinical Medical Physics
|June 5, 2003
Abstract:
An in vivo dosimetry system that uses p-type semiconductor diodes with buildup caps was characterized for clinical use on accelerators ranging in energy from 4 to 18 MV. The dose per pulse dependence was investigated. This was done by altering the source-surface distance, field size, and wedge for photons. The off-axis correction and effect of changing repetition rate were also investigated. A model was developed to fit the measured two-dimensional diode correction factors.