Title :
Characterisation of radioluminesence based optical fibre dosimeter in radiotherapy beam applications
Author :
Woulfe, Peter ; O´Keeffe, S. ; McCarthy, D. ; Grattan, M. ; Hounsell, A. ; Cronin, Joseph ; Lewis, Elfed
Author_Institution :
Dept. of Radiotherapy Phys., Galway Clinic, Galway, Ireland
Abstract :
A PMMA (polymethyl methacrylate) based plastic optical fibre is coated with radiation sensitive inorganic scintillators that fluoresce when exposed to ionising radiation. The emitted signal penetrates the fibre and propagates along the fibre where it is remotely monitored using a fluorescence spectrometer. The dosimeter is characterised for a range of parameters associated with radiotherapy treatment plans, including field size and dose rate. The results demonstrate good repeatability, with a maximum percentage error of 0.59% and the response is independent of dose rate.
Keywords :
dosimeters; dosimetry; fluorescence; optical fibres; optical polymers; plastics; radiation therapy; scintillation; dose rate; field size; fluorescence spectrometer; ionising radiation; maximum percentage error; polymethyl methacrylate-based plastic optical fibre; radiation sensitive inorganic scintillators; radioluminesence based optical fibre dosimeter; radiotherapy beam applications; radiotherapy treatment plans; remote monitoring; signal emission; Materials; Optical fiber sensors; Optical fibers; Optical filters;
Conference_Titel :
SENSORS, 2013 IEEE
Conference_Location :
Baltimore, MD
DOI :
10.1109/ICSENS.2013.6688478
