The duration of one CT could already be decreased in test studies
down to one hour by simply acquiring less projections, decreasing the exposure time and the spatial resolution
of the scan. The latter point is quite crucial for dark-field studies, since the origin of the signal allows one to
study processes on a length scale which is well below the spatial resolution of the imaging system. As shown in
this study, we were able to visualize the transport of water from pores with a size of a few micrometers while the
spatial resolution was only 93 μm. This aspect and the fact that time-resolved tomography becomes feasible with
shorter measurement time makes grating-based X-ray dark-field imaging extremely attractive for the study of
slow dynamic processes on the micrometer length-scale.