Iradon toolbox

Relation between Radon transformation and EPRI

Spatial imaging

Spectral imaging

Three parameters of spectral imaging are number of spectral angles N_α, image spatial support ΔL and image spectral support ΔB. The resulting image has physical dimensions of ΔL and ΔB. The equal spectral angle gradient scheme given above is not the best and is given as an example. ΔB that covers all regions of EPR spectrum with significant intensity is required for proper reconstruction. For a single line spectrum ΔB of 5-7 line widths is recommended.
Note that the required B^sweep and G are quickly growing with the increase of N_α. For reconstruction methods that demand equal number of points in all projections (e.g. iradon_d2d_mstage), the EPR spectra have to be re-sampled to accommodate difference in B^sweep. Correspondingly, the intensity of EPR spectra I has to be renormalized.