Thanks that explains part of it. With the linear transformation there is
part of the temporal cut-off (which appears to be appropriate). With the
non-linear it appears the brain is stretched, there appear to be parts
of the temporal lobe present that was not present before.
Thanks,
Vina
Steve Smith wrote:
> Hi - we definitely see improved registrations (of the structurals to
> standard space) when adding FNIRT on top of the affine FLIRT-derived
> transformation. One possibly confusing factor is the end-slice
> interpolation is currently different when using FNIRT (that'll be made
> more consistent in future) so it may appear that the very top and
> bottom of the data are 'stretched' (though this shouldn't affect any
> higher-level analyses as it should be outside the standard space brain
> space). [Jesper - did I get that bit right?]
>
> Cheers.
>
>
>
> On 12 Nov 2008, at 01:53, Vina Goghari wrote:
>
>> Hi,
>> I used the older FSL version previously with FLIRT to register my
>> images. With this new version I also used the nonlinear Warp
>> Resolution as well with default of 10 (same subject). The other
>> search options remained the same. However, it appears the
>> registration does not look as good with the new version in some
>> regards? I wasn't able to attach images...
>>
>> Thanks for any insight you can provide!
>>
>> Vina
>>
>
>
> ---------------------------------------------------------------------------
>
> 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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