Fokker-Planck speckle-based tensor tomography

Speckle-based X-ray imaging is an experimentally simple low-exposure imaging technique capable of extracting information regarding a sample’s microstructural organisation, namely through directional dark-field imaging. This proposal will implement and develop the first speckle-based dark-field tensor-tomography experiments, at ID19. Currently, using speckle-based approaches, directional dark-field imaging is limited to projection, therefore providing only two-dimensional information. Current tensor-tomography techniques require tomographic data to be collected about multiple axes of rotation. Due to the two-dimensional sensitivity of speckle-based imaging, data is required about only two rotation axes, making it more dose efficient. We have developed the critical underlying theoretical formalisms and believe that experimental implementation is the next significant step to develop speckle-based X-ray imaging into a user-friendly high-resolution imaging modality.