X-ray phase-imaging scanner with tiled bent gratings for large-field-of-view nondestructive testing

Talbot interferometry with curved quasi-periodic gratings: towards large field of view X-ray phase-contrast imaging.

X-ray phase-contrast imaging based on grating interferometry has become a common method due to its superior contrast in biological soft tissue imaging. The high sensitivity relies on the high-aspect ratio structures of the planar gratings, which prohibit the large field of view applications with a diverging X-ray source. Curved gratings allow a high X-ray flux for a wider angular range, but the...

X-Ray Phase-Contrast Imaging with Three 2D Gratings

X-ray imaging is of paramount importance for clinical and preclinical imaging but it is fundamentally restricted by the attenuation-based contrast mechanism, which has remained essentially the same since Roentgen's discovery a century ago. Recently, based on the Talbot effect, groundbreaking work was reported using 1D gratings for X-ray phase-contrast imaging with a hospital-grade X-ray tube in...

High resolution , large field of view x - ray differential phase contrast imaging on a compact setup

Subnanoradian X-ray phase-contrast imaging using a far-field interferometer of nanometric phase gratings

Hard X-ray phase-contrast imaging characterizes the electron density distribution in an object without the need for radiation absorption. The power of phase contrast to resolve subtle changes, such as those in soft tissue structures, lies in its ability to detect minute refractive bending of X-rays. Here we report a far-field, two-arm interferometer based on the new nanometric phase gratings, w...

A Condenser Scanner for Artifact-Free, Large Field of View, Full-Field X-ray Microscopy at Synchrotrons

Most full-field microscopes at synchrotrons exhibit a highly peaked illumination in the center of the field of view for stationary condenser and objective optics. This illumination pattern is typically reference-corrected by division with an image without the sample to correct for the uneven illumination. However, this correction does not rectify problems such as the poor signal-to-noise ratio ...