Multiscale X-ray imaging using ptychography

High Resolution Hard X-ray Magnetic Imaging with Dichroic Ptychography

Claire Donnelly, 2 Valerio Scagnoli, 2, ∗ Manuel Guizar-Sicairos, Mirko Holler, Fabrice Wilhelm, Francois Guillou, Andrei Rogalev, Carsten Detlefs, Andreas Menzel, Jörg Raabe, and Laura J. Heyderman 2, † Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland Paul Scherrer Institute, 5232 Villigen PSI, Switzerland ESRF, 71 Avenue des Martyrs, 38000 Greno...

Imaging of highly inhomogeneous strain field in nanocrystals using x-ray Bragg ptychography: A numerical study

Dynamic imaging using ptychography.

We demonstrate through experiment an example of "mixed state" reconstruction using x-ray ptychography. We demonstrate successful imaging of a vibrating sample that has dynamics that are of one order magnitude faster than the measurement times. We show how increased vibrational amplitude leads to an increased population of illumination modes, a characteristic of partial coherence. Implications o...

Framework for three-dimensional coherent diffraction imaging by focused beam x-ray Bragg ptychography.

We present the framework for convergent beam Bragg ptychography, and, using simulations, we demonstrate that nanocrystals can be ptychographically reconstructed from highly convergent x-ray Bragg diffraction. The ptychographic iterative engine is extended to three dimensions and shown to successfully reconstruct a simulated nanocrystal using overlapping raster scans with a defocused curved beam...

Multiscale deformable registration for dual-energy x-ray imaging.

Dual-energy (DE) imaging of the chest improves the conspicuity of subtle lung nodules through the removal of overlying anatomical noise. Recent work has shown double-shot DE imaging (i.e., successive acquisition of low- and high-energy projections) to provide detective quantum efficiency, spectral separation (and therefore contrast), and radiation dose superior to single-shot DE imaging configu...