Figure 6

Extraction of the mean XRF spectra of a chosen area in a virtual slice of the Arabidopsis seed. (A) Reconstructed high-resolution virtual slice of the sum XRF spectra of the Arabidopsis seed. (B) Comparison of the mean XRF spectra of the selected area, marked by a red dashed circle in (A), obtained by FBP (red curve) and MLEM (blue curve) algorithm. (C) The mean XRF spectra of the selected area obtained by MLEM from 360 projections (blue curve) and from 20 projections (fuchsine curve).