Super-resolution x-ray phase-contrast and dark-field imaging with a single 2D grating and electromagnetic source stepping

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift


Here we report a method for increased resolution of single exposure three modality x-ray images using super-resolution. The three x-ray image modalities are absorption-, differential phase- contrast-, and dark-field-images. To create super-resolution, a non-mechanically movable micro- focus x-ray source is used. A series of almost identical x-ray projection images is obtained while the point source is translated in a two-dimensional grid pattern. The three image modalities are extracted from fourier space using spatial harmonic analysis, also known as the single-shot method. Using super-resolution on the low-resolution series of the three modalities separately results in high- resolution images for the modalities. This approach allows to compensate for the inherent loss in resolution caused by the single-shot method without increasing the need for stability or algorithms accounting for possible motion.


Enheter & grupper
Externa organisationer
  • Lund University
  • University of Copenhagen
  • Excillum AB

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Fysik


Sidor (från-till)1-8
Antal sidor8
TidskriftPhysics in Medicine and Biology
StatusPublished - 2019 aug 14
Peer review utfördJa