Abstract

Gafchromic external beam therapy 3 (EBT3) film has widely been used in medical field applications. Principally, the EBT3 film’s color gradually changes from light green to darker color under incremental exposures by ionizing or even non-ionizing ultraviolet (UV) radiation. Peak absorbance of the EBT3 film can be used to predict absorbed doses by the film. However, until today, related researches still rely on spectrometers for color analysis of EBT3 films. Hence, this paper presents a comparative analysis between results produced by the spectrometer and a much simpler light-emitting diode-photodiode based system in profiling the color changes of EBT3 films after exposure by solar UV radiation. This work has been conducted on a set of 50 EBT3 samples with incremental solar UV exposure (doses). The wavelength in the red region has the best sensitivity in profiling the color changes of EBT3 films for low solar UV exposure measurement. This study foresees the ability of blue wavelength to profile films with a large range of solar UV exposure. The LED (light emitting diode)-based optical system has produced comparable measurement accuracies to the spectrometer and thus, with a potential for replacing the need for a multipurpose spectroscopy system for simple measurement of light attenuation.

Details

Title
Spectroscopy and Light Emitting Diodes Based System in Characterizing External Beam Therapy 3 Films for Solar Ultraviolet Measurement
Author
Ahmad Shah Wan Insaniah Saleha 1 ; Omar Ahmad Fairuz 1 

 Universiti Sains Malaysia, School of Physics, Penang, Malaysia (GRID:grid.11875.3a) (ISNI:0000 0001 2294 3534) 
Pages
34-44
Publication year
2020
Publication date
Mar 2020
Publisher
Springer Nature B.V.
ISSN
16749251
e-ISSN
21907439
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2291118404
Copyright
Photonic Sensors is a copyright of Springer, (2019). All Rights Reserved. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.