i guess you could add an EV in your GLM to account for variance
associated with the choice of sequence.
check that the sequences have the same b-value.
if possible, scan a control subject with both sequences and look for any
large differences in diffusivities.
s
Vishwadeep Ahluwalia wrote:
> Hi,
> We have some old DTI data from about 17 controls and 17 patients. Some DTI
> data was acquired with 23 directions, 23 slices, 5mm thickness and 0 spacing
> and some was acquired with 25 directions, 32 slices, 3.5mm thickness and 0
> spacing. I want to contrast the FA maps of controls and patients using
> either TBSS or VBM. Can i do this considering that the acquisition
> parameters are inhomogeneous?
> -Vish
>
--
========================
Scott Kolbe
Neuroimaging Group
Florey Neuroscience Institutes and
Centre for Neuroscience
University of Melbourne
VIC, Australia, 3010.
ph: +61 3 8344 1929
email: [log in to unmask]
website: www.neuroimaging.org.au/index.php?id=383
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