Hi Suzanna,
I would just add to what Saad has suggested that in
any DTI analysis (TBSS or voxel-based approach), it's
always more successful to use the FA rather than the
B0 maps to constrain the non-linear registration of
the native diffusion images (B0, MD, FA etc.)...
Best,
Gwenaelle
--- Suzanna Laycock <[log in to unmask]> a
écrit :
> Hi FSL users,
>
> I'm contemplating using FSL to conduct some DTI
> analysis. We've alrady
> looked at another analysis approach, but it hasn't
> been hugely sucessful. I
> apologise for the simplicity of the following
> questions.
>
> I have data from a Philips 3T scanner, the DTI
> consists of 70 slices over
> the whole brain, with 34 directions. We also
> conducted a further DWI scan
> to acquire another B=0 dataset. We have two groups
> of data correcponding to
> an experimental group and an age-, sex-, IQ-matched
> control group.
>
> The step taken after that was to put both DTI and
> DWI scan data together and
> generate one large ANALYZE file. We then used
> DTIStudio to generate the FA
> maps and saved the B0 scan. Our plan had then been
> to use SPM to spatially
> normalise the B0 data to their EPI template, then
> conduct statistical
> analyses on the grouped data. Unfortunately the
> spatial normalising doesn't
> seem very robust.
>
> I'm presuming that something like this can be done
> using FDT. Is it
> possible to use FSL on FA data generated in another
> package, or should one
> just use FSL from the start? Also, I've looked at
> the FAQs, but I was
> wondering if there was a step-by-step guide to using
> FDT for newbies who
> don't have much analysis knowledge!
>
> Thanks in advance for any advice.
>
> Best wishes
> Suzanna
>
>
----------------------------------------------------------------
> Miss Suzanna K. Laycock
> Postgraduate Student
> Department of Psychology and Academic Unit of
> Radiology
> Weston Bank, Sheffield, S10 2TN, UK
> Phone: (0114) 22 26526
> Email: [log in to unmask]
>
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