title: High-resolution mapping of 1D and 2D dose distributions using X-band electron paramagnetic resonance imaging.
abstract: Electron paramagnetic resonance imaging (EPRI) was performed to visualise 2D dose distributions of homogenously irradiated potassium dithionate tablets and to demonstrate determination of 1D dose profiles along the height of the tablets. Mathematical correction was applied for each relative dose profile in order to take into account the inhomogeneous response of the resonator using X-band EPRI. The dose profiles are presented with the spatial resolution of 0.6 mm from the acquired 2D images; this value is limited by pixel size, and 1D dose profiles from 1D imaging with spatial resolution of 0.3 mm limited by the intrinsic line-width of potassium dithionate. In this paper, dose profiles from 2D reconstructed electron paramagnetic resonance (EPR) images using the Xepr software package by Bruker are focussed. The conclusion is that using potassium dithionate, the resolution 0.3 mm is sufficient for mapping steep dose gradients if the dosemeters are covering only ±2 mm around the centre of the resonator.
authors.affiliation: Radiation Physics, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
authors.forename: N
authors.initials: N
authors.lastname: Kolbun
authors.affiliation: Department of Radiation Physics and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden.
authors.forename: E
authors.initials: E
authors.lastname: Adolfsson
authors.affiliation: Department of Medical Technology and Radiation Physics, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden Centre for Medical Image Science and Visualization, CMIV, Linköping University, Linköping, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Gustafsson
authors.affiliation: Radiation Physics, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden eva.lund@liu.se.
authors.forename: E
authors.initials: E
authors.lastname: Lund
mesh_terms: D004578:Electron Spin Resonance Spectroscopy / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008433:Mathematics; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D013871:Thiones / Q000737:chemistry / Q000528:radiation effects*
chemical_list: D013871:Thiones