Diffusion imaging with hyperpolarized 3He Gas
We used MRI of hyperpolarized 3He to demonstrate some novel aspects of gas diffusion. Two different techniques were used. First, a slice was burned into a one-dimensional image by inverting the spins in the slice and diffusion was studied by measuring the magnetization as it filled the depleted slice. A diffusion coefficient was determined by the fit of these data. Second, one-dimensional diffusion images were made using a Stejskal-Tanner PGSE method. This was done with and without a temperature gradient present, showing that the effect of temperature can be dynamically monitored by such diffusion images. Copyright 1997 Academic Press. Copyright 1997Academic Press
Schmidt
DM
Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA.
George
JS
Penttila
SI
Caprihan
A
Fukushima
E