X-Ray fluorescence ghost tomography

X-ray fluorescence computed tomography (XRF-CT) is an important imaging technique that provides three-dimensional chemical maps. It can be used in many fields for example, to study the distribution of trace elements in biological tissues, to map the distribution of metal ions in materials, or to study the distribution of contrast agents in medical imaging. Despite its success XRF-CT faces several challenges related to the requirement to focus the incident beam and raster scan the sample. We propose to exploit an innovative approach known as Ghost Imaging for XRF-CT that eliminates the need for raster scanning the sample and that can be used as a full field imaging method. This approach has several advantages including (a) a significant reduction in the measurement time or deposited dose, (b) measuring more complex samples and at higher resolutions compared to present-day techniques, (c) higher tolerance to positioning drifts.