NMR imaging and diffusion

Magnetic resonance in the guise of conventional imaging (MRI, also known as k-space imaging) and diffusion imaging (q-space imaging) and combined k- and q-space imaging provides a powerful means of probing porous media and the dynamic processes occurring within such media. This article provides an overview of the imaging process and the accessible length scales of these techniques for probing porous media as well as the type of information that can be obtained. Image reconstruction as well as sources of artefacts are also covered in detail. Some applications of these techniques are also reviewed. Particular problems related to measurements in nanoporous systems are highlighted.