Jürgen Durst

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: 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: In this paper, a simple expression for the signal-to-noise ratio (SNR) and zero-frequency quantum efficiency (DQE) of a photon counting pixel detector is given.

TL;DR: In this paper, the expected energy deposition distribution with the help of the Monte-Carlo simulation tool ROSI was calculated and the energy response function was used in two deconvolution methods to determine X-ray spectra from measured energy deposition spectra.