Hi Jessica,
what were the coils? Certainly you will find substantial differences
comparing across both field strength and receive coil. Did the
segmentations look reasonable? Was it the same sequence?
Bruce
On Thu, 23 Jun 2011, Jessica Liu wrote:
Hi everyone!
I'm currently a summer student working at a lab which uses Freesurfer to
measure hippocampal volumes. I noticed that scanning the same patient first
on a GE 3T (Multi-channel head coil) and then a GE 1.5T (single-channel head
coil) 24 hours later resulted in a 30% increase in the left hippocampus
volume and a 18% increase for the right hippocampus based on the values in
aseg.stats. Can anyone please comment on this and explain the large
discrepancies? Thanks!
Jessica Liu
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