Open Access3D dose distribution measurement using 2D imaging from NaCl optical crystals
Author(s) -
A Chapsky,
Nigel A. Spooner,
Alexandre Santos,
Thomas P. Rutten
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1662/1/012009
Subject(s) - dosimeter , extrapolation , signal (programming language) , materials science , attenuation , optics , laser , optically stimulated luminescence , radiation , crystal (programming language) , beam (structure) , deposition (geology) , biomedical engineering , optoelectronics , physics , computer science , medicine , luminescence , mathematics , geology , paleontology , sediment , programming language , mathematical analysis
In radiotherapy practice, 1D and 2D dosimeters are used for dose verification prior to patient treatment. Along with high accuracy and precision of dose measurements that these dosimeters provide, acquisition of dose deposition data in three dimensions requires extrapolation of measured data. Development of a 3D dosimeter would provide continuous information of dose distribution in matter. In this work, NaCl 3D crystal has shown that radiation deposition can be imaged using blue laser stimulation in two dimensions. It was further shown that the intensity of collected signal has near – linear dose dependence, however complete signal readout is required, to compensate for gradual signal collection at different depths along the profile of the stimulating laser beam, due to attenuation of the beam within the crystal. A method to extend dose measurement to three dimensions using imaging is proposed.