|
FIG 2. Diffusion maps.
Diffusion maps were generated from unweighted (b = 0) and weighted (b = 1228 s/cm2) images. The b factor refers to the effective diffusion weighting; it is a function of the amplitude of the gradients and their duration (see Methods for details). It is readily apparent that at 12 and 24 hours there are widespread changes in signal intensity in the hippocampus and piriform cortex. These alterations are quantified by an increase in ADC in the hippocampus (arrowheads), whereas there is a decrease in the piriform cortex (arrows) and retrosplenial cortex (*). Note that the retrosplenial cortex returns to control ADC levels by 24 hours.
|