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Figure 1
Schematic layout of the dual-energy imaging technique. (a) Two sets of projections were acquired by STXM at energies below and above the absorption edge of a specific element, (b) the projections were reconstructed by the EST algorithm separately (scale bar 4.0 µm) and (c) the quantitative three-dimensional distribution of the specific element was calculated based on the abrupt change in the absorption (scale bar 2.0 µm).

IUCrJ
Volume 5| Part 2| March 2018| Pages 141-149
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517017912