Florian Bayer

TL;DR: In this paper, it was shown that a distribution of micrometer-sized calcifications in the human breast which are not visible in clinical x-ray mammography at diagnostic dose levels can produce a significant dark-field signal in a grating-based xray phase-contrast imaging setup with a tungsten anode xray tube operated at 40 kVp.

TL;DR: The authors used a least squares fitting algorithm to calculate the noise behavior of the three quantities absorption, differential phase, and dark-field image and found that the variance of the reconstructed phase is only dependent of the total number of photons used to generate the phase image and the visibility of the experimental setup.

TL;DR: In this article, a prototype particle tracking telescope was constructed using Timepix and Medipix ASIC hybrid pixel assemblies as the six sensing planes Each telescope plane consisted of one 14 cm2 assembly, providing a 256 ×256 array of 55μm square pixels The telescope achieved a pointing resolution of 24μm at the position of the device under test.

TL;DR: Comparison with the histomorphometric image proofs that the darkfield signal correlates with a tumor region containing small calcification grains of 3 to 30μm size, which reveals considerably higher contrast than those observed in digital mammography.

TL;DR: A reconstruction method is proposed for grating-based X-ray dark-field tomography, which models the orientation-dependent signal as an additional observable from a standard tomographic scan, and extends the tomographic volume to a tensorial set of voxel data, containing the local orientation and contributions todark-field scattering.