Phantoms, both numerical (software) and physical (hardware), can serve as a gold standard
for the validation of MRI methods probing the brain microstructure. This review aims to …

As part of an issue celebrating 2 decades of Joseph Ackerman editing the Journal of
Magnetic Resonance, this paper reviews recent progress in one of the many areas in which …

Despite their widespread use in non-invasive studies of porous materials, conventional MRI
methods yield ambiguous results for microscopically heterogeneous materials such as brain …

Conventional diffusion MRI yields voxel‐averaged parameters that suffer from ambiguities
for heterogeneous anisotropic materials such as brain tissue. Using principles from solid …

Designing novel diffusion-weighted pulse sequences to probe tissue microstructure beyond
the conventional Stejskal-Tanner family is currently of broad interest. One such technique …

Recently, several biophysical models and signal representations have been proposed for
microstructure imaging based on tensor-valued, or multidimensional, diffusion MRI. The …

In biological tissues, typical MRI voxels comprise multiple microscopic environments, the
local organization of which can be captured by microscopic diffusion tensors. The measured …

For large diffusion weightings, the direction‐averaged diffusion MRI (dMRI) signal from white
matter is typically dominated by the contribution of water confined to axons. This fact can be …

Whereas diffusion NMR can probe the structural configurations configurations of
microscopic environments in biological tissue, relaxation can provide complementary …

Recent advances in diffusion weighted MRI have reignited interest in spherical (or isotropic)
diffusion encoding. For such encoding to reach high efficiency (minimal echo time), the …