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

Summary, in English

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.

• Författare: Kristian R. Rix; Till Dreier; Tao Shen; Martin Bech
• Avdelning/ar: Medicinsk strålningsfysik, Lund; X-ray Phase Contrast
• Publiceringsår: 2019-08-14
• Språk: Engelska
• Sidor: 1-8
• Publikation/Tidskrift/Serie: Physics in Medicine and Biology
• Volym: 64
• Issue: 16
• Länkar: http://dx.doi.org/10.1088/1361-6560/ab2ff5
• Dokumenttyp: Artikel i tidskrift
• Förlag: IOP Publishing
• Ämne: Physical Sciences; Other Physics Topics
• Nyckelord: x-ray; Phase-contrast imaging; dark-field imaging; X-ray phase-contrast imaging; super-resolution imaging
• Status: Published
• Forskningsgrupp: X-ray Phase Contrast
• ISBN/ISSN/Övrigt: ISSN: 1361-6560