Quantitative amplitude and phase contrast imaging in a scanning transmission X-ray microscope.
Phase contrast in X-ray imaging provides lower radiation dose, and dramatically higher contrast at multi-keV photon energies when compared with absorption contrast. We describe here the use of a segmented detector in a scanning transmission X-ray microscope to collect partially coherent bright field images. We have adapted a Fourier filter reconstruction technique developed by McCallum, Landauer and Rodenburg to retrieve separate, quantitative maps of specimen phase shift and absorption. This is demonstrated in the imaging of a germanium test pattern using 525eV soft X-rays.
Hornberger
Benjamin
B
Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794-3800, USA. benjamin.hornberger@stonybrook.edu
Feser
Michael
M
Jacobsen
Chris
C
D005583:Fourier Analysis; D005857:Germanium; D007091:Image Processing, Computer-Assisted; D017348:Microscopy, Electron, Scanning Transmission / Q000379:methods* / Q000706:statistics & numerical data; D008858:Microscopy, Phase-Contrast / Q000379:methods* / Q000706:statistics & numerical data; D014965:X-Rays
D005857:Germanium