Effects of restricted diffusion on microscopic NMR imaging

Nuclear Magnetic Resonance of Laser-Polarized Noble Gases in Molecules, Materials, and Organisms

“…Up to one million particles were used in order to reduce the noise in the simulations. The algorithm used for these simulations is similar to those used by Hyslop and Lauterbur [191] and Putz et al [192]; the calculations presented here agree with their previous results when given the same set of parameters.…”

“…[12,204,205]). In fact, it has been suggested that the effects of diffusion on MRI can be used to detect impermeable and semi-permeable membranes [191]. As previously mentioned, it has been shown that diffusion-mediated edge spikes like those seen in Fig.…”

“…This effect was first suggested by numerical simulations [191,192] and was later explored experimentally [193,194] using lH NMR of liquid samples.…”

“…Gx ( [191,192,196]. Edge spikes such as these have been observed (but not characterized) recently in polarized gas samples [200,203]; Saam et al [200] used this effect to demonstrate edge enhancement in the images of polarized 3He gas samples.…”

A general framework to quantify the effect of restricted diffusion on the NMR signal with applications to double pulsed field gradient NMR experiments

“…33 It was demonstrated that the anisotropy observed in double-PFG experiments with short mixing times can be attributed to the same kind of anisotropy, this time in microscopic pores. 22 In this work, mapping of microscopic anisotropy was generalized to data obtained with higher 2qa values, where a is a characteristic pore dimension.…”