X-Ray Multimodal Tomography Using Speckle-Vector Tracking

TL;DR

This paper introduces novel x-ray multimodal tomography techniques using speckle-vector tracking, enabling efficient absorption, phase, and dark-field imaging with reduced sample exposures, demonstrated on synchrotron data.

Contribution

It presents two interlaced schemes for speckle-based CT, including a single-image approach for absorption and phase reconstructions, advancing multimodal x-ray imaging.

Findings

Successful CT reconstructions from speckle-based signals.

Reduced number of sample exposures needed.

Potential for complex sample imaging at synchrotrons.

Abstract

We demonstrate computerized tomography (CT) reconstructions from absorption, phase and dark-field signals obtained from scans acquired when the x-ray probe light is modulated with speckle. Two different interlaced schemes are proposed to reduce the number of sample exposures. First, the already demonstrated x-ray speckle-vector tracking (XSVT) concept for projection imaging allows the three signal CT reconstructions from multiple images per projection. Second, a modified XSVT approach is shown to provide absorption and phase reconstructions, this time from a single image per angular projection. Reconstructions from data obtained at a synchrotron facility emphasize the potential of the approaches for the imaging of complex samples.