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

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
Organisations
External organisations
  • Lund University
  • University of Copenhagen
  • Excillum AB
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Physical Sciences

Keywords

  • x-ray, Phase-contrast imaging, dark-field imaging, X-ray phase-contrast imaging, super-resolution imaging
Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalPhysics in Medicine and Biology
Volume64
Issue number16
Publication statusPublished - 2019 Aug 14
Publication categoryResearch
Peer-reviewedYes