Hi - it depends whether you are talking about inverting the
projection of the nonlinear aligned data (all_FA) onto the skeleton,
or inverting the initial nonlinear registration - I suspect that you
are talking about the latter.
In which case...the good news is that there's a -invert flag in the
IRTK program "transformation". The bad news is that it doesn't seem
to work.
Then...the other good news is that we can convert from the IRTK dof
warp format to a NIFTI warp image (script attached)....the bad news
is that we haven't released a warp inversion program yet....
So - watch this space...
Cheers.
On 7 Nov 2006, at 16:44, Vasanth Pappu wrote:
> Hi,
>
> I have used TBSS to register the FA data of some subjects' volumes.
> If I draw an ROI in this registered space, and want to see how it
> looks in the native space of each individual subject, how would I
> go about applying a reverse transform?
>
> Thanks,
> Vasanth
>
> --
> --
> Vasanth Pappu
> MGH-NMR Center
> Department of Neurology
> 149 13th Street - 2271
> Charlestown, MA 02129
> [log in to unmask]
> 617-726-9128
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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
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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