In a conventional diffusion-weighted MRI
experiment, the signal amplitude depends on the squared magnitude of the Fourier
transformation of the pore or cell geometry, i.e. the underlying cell or pore
geometry cannot be reconstructed. Several approaches have been proposed that determine
the otherwise missing phase information and, thus, can image the pore or cell
geometry directly. Here, the performance of these methods is compared with respect
to their applicability in practice, e.g. considering the impact of the noise level,
mixtures of pore sizes, orientations, and shapes, and gradient pulse durations
and diffusion times achievable on standard MRI systems.
