title: Energy weighted x-ray dark-field imaging.
abstract: The dark-field image obtained in grating-based x-ray phase-contrast imaging can provide information about the objects' microstructures on a scale smaller than the pixel size even with low geometric magnification. In this publication we demonstrate that the dark-field image quality can be enhanced with an energy-resolving pixel detector. Energy-resolved x-ray dark-field images were acquired with a 16-energy-channel photon-counting pixel detector with a 1 mm thick CdTe sensor in a Talbot-Lau x-ray interferometer. A method for contrast-noise-ratio (CNR) enhancement is proposed and validated experimentally. In measurements, a CNR improvement by a factor of 1.14 was obtained. This is equivalent to a possible radiation dose reduction of 23%.
authors.forename: Georg
authors.initials: G
authors.lastname: Pelzer
authors.forename: Andrea
authors.initials: A
authors.lastname: Zang
authors.forename: Gisela
authors.initials: G
authors.lastname: Anton
authors.forename: Florian
authors.initials: F
authors.lastname: Bayer
authors.forename: Florian
authors.initials: F
authors.lastname: Horn
authors.forename: Manuel
authors.initials: M
authors.lastname: Kraus
authors.forename: Jens
authors.initials: J
authors.lastname: Rieger
authors.forename: Andre
authors.initials: A
authors.lastname: Ritter
authors.forename: Johannes
authors.initials: J
authors.lastname: Wandner
authors.forename: Thomas
authors.initials: T
authors.lastname: Weber
authors.forename: Alex
authors.initials: A
authors.lastname: Fauler
authors.forename: Michael
authors.initials: M
authors.lastname: Fiederle
authors.forename: Winnie S
authors.initials: WS
authors.lastname: Wong
authors.forename: Michael
authors.initials: M
authors.lastname: Campbell
authors.forename: Jan
authors.initials: J
authors.lastname: Meiser
authors.forename: Pascal
authors.initials: P
authors.lastname: Meyer
authors.forename: Jürgen
authors.initials: J
authors.lastname: Mohr
authors.forename: Thilo
authors.initials: T
authors.lastname: Michel