Grating-based x-ray phase-contrast imaging with a multi energy-channel photon-counting pixel detector.
We have carried out grating-based x-ray differential phase-contrast measurements with a hybrid pixel detector in 16 energy channels simultaneously. A method for combining the energy resolved phase-contrast images based on energy weighting is presented. An improvement in contrast-to-noise ratio by 58.2% with respect to an emulated integrating detector could be observed in the final image. The same image quality could thus be achieved with this detector and with energy weighting at 60.0% reduced dose compared to an integrating detector. The benefit of the method depends on the object, spectrum, interferometer design and the detector efficiency.
Georg
G
Pelzer
Thomas
T
Weber
Gisela
G
Anton
Rafael
R
Ballabriga
Florian
F
Bayer
Michael
M
Campbell
Thomas
T
Gabor
Wilhelm
W
Haas
Florian
F
Horn
Xavi
X
Llopart
Norbert
N
Michel
Uwe
U
Mollenbauer
Jens
J
Rieger
André
A
Ritter
Ina
I
Ritter
Peter
P
Sievers
Stefan
S
Wölfel
Winnie S
WS
Wong
Andrea
A
Zang
Thilo
T
Michel
D004867:Equipment Design; D019544:Equipment Failure Analysis; D010783:Photometry / Q000295:instrumentation*; D017785:Photons; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D014057:Tomography, X-Ray Computed / Q000295:instrumentation*; D014159:Transducers