Open AccessCharacterization of an in vivo diode dosimetry system for clinical use
Author(s) -
Huang Kai,
Bice William S.,
HidalgoSalvatierra Oscar
Publication year - 2003
Publication title -
journal of applied clinical medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.83
H-Index - 48
ISSN - 1526-9914
DOI - 10.1120/jacmp.v4i2.2528
Subject(s) - dosimetry , diode , wedge (geometry) , optics , materials science , photon , semiconductor , nuclear medicine , medical physics , optoelectronics , physics , medicine
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. PACS number(s): 87.66.–a, 87.52.–g