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

Super-resolution X-ray phase-contrast and dark-field imaging with a single 2D grating and electromagnetic source stepping.
Phys Med Biol. 2019 Jul 08;:
Authors: Rix KR, Dreier T, Shen T, Bech M
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 one high-resolution image for each modality. 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.
PMID: 31284279 [PubMed - as supplied by publisher]

Source: Physics in Medicine and Biology - July 7, 2019 Category: Physics Authors: Rix KR, Dreier T, Shen T, Bech M Tags: Phys Med Biol Source Type: research