Hi,
I would fear that with such thick slices (etc.) these two protocols
are quite likely to be quite different (contain different distortions
etc) and hence quite likely not compatible with each other easily. I
doubt you would be able to end up with better final resolution (etc.)
than either of the separate datasets originally. You would be better
to just acquire better (e.g. isotropic 2.5x2.5x2.5mm) resolution at
the start.
Cheers.
On 10 Oct 2008, at 03:05, Yi-Shin Sheu wrote:
> Dear FSL experts,
>
> Our axial DTI scans have a dimension of 1.7 x 1.7 x 5 mm^3; our
> sagital DTI
> scans also have the same dimension, and both scans share the same
> parameters. Since we collected DTI scans at both planes, I am
> wondering if I
> could combine them together to increase the resolution for TBSS
> analysis or
> tractography?
>
> My initial thinking is that maybe I could reorient the sagital scan
> to the same
> orientation as the axial ones, and then run mcflirt to line them up
> and average
> them voxel by voxel?
>
> My instuition tells me it does not sound like a good idea, but I
> would like to
> get some input on this.
>
> Thank you in advance.
>
> Yi-Shin
>
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
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