Groso, A.Margaritondo, G.Hwu, Y.Tsai, W. L.Je, J. H.Lai, B.2006-10-032006-10-032006-10-03200210.1063/1.1524292https://infoscience.epfl.ch/handle/20.500.14299/234878WOS:0001792073000551019Can the photon energy dependence of coherence-enhanced radiographs lead to elemental identification? Our tests pave the way to a positive response by showing that image details do change as the photon energy crosses an absorption threshold. The observed changes are explained by a simple model of the interplay between the real and imaginary parts of the refractive index. (C) 2002 American Institute of Physics.PHASE-CONTRASTX-RAYStext::journal::journal article::research article