Fig. : Principle of scanning-SAXS imaging. The specimen (for example a tooth section) is scanned across the x-ray beam with a diameter between tens of nanometers and several micrometers. Parameters extracted from the scattering patterns can then be mapped with a resolution corresponding to the x-ray beam diameter. In the figure, this is the thickness of mineral particles in dentin (the star indicates an area with a caries lesion). Picture adapted from .