Dear FSLers
I have some patient data which was half collected at b=1000 and half at
b=2000 - sequence changed but we didn't notice :(
I scanned two controls with both b-values, registered the diffusivity
images, then fitted curves to scatterplots for voxel-wise measures of MD
and L1-3 between the two scans (screen grab attached for MD in one of
the controls). I would like to correct the diffusivity values for the
b=2000 group to match the b=1000 group so i can study the diffusivities
for all patients.
I am interested to know if anyone has done this before? i get very good
agreement between the curve fits between the two control subjects but
i'm not sure how many more i should double scan.
also, are there any problems with correcting the diffusivity values like
this that I have not foreseen? i understand that the SNR is different
but does this prohibit diffusivity correction?
cheers
Scott
--
========================
Scott Kolbe
MS Imaging Group
Howard Florey Institute &
Centre for Neuroscience
University of Melbourne
VIC, Australia, 3010.
ph: +61 3 8344 1887
email: [log in to unmask]
website: www.neuroimaging.org.au/index.php?id=383
--
========================
Scott Kolbe
MS Imaging Group
Howard Florey Institute &
Centre for Neuroscience
University of Melbourne
VIC, Australia, 3010.
ph: +61 3 8344 1887
email: [log in to unmask]
website: www.neuroimaging.org.au/index.php?id=383
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