Characterization of an in vivo diode dosimetry system for clinical use.
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.
Huang
Kai
K
Department of Physics & Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA. khuang1@lsu.edu
Bice
William S
WS
Hidalgo-Salvatierra
Oscar
O
D002985:Clinical Protocols; D006801:Humans; D017785:Photons; D011785:Quality Assurance, Health Care; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000295:instrumentation* / Q000379:methods*; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry
D012825:Silicon