Hi - this flag just affects the way that the different segmented
tissue types are labelled - it doesn't affect the core segmentation
process itself. Where the contrast is improved in a certain modality
(eg PD for deeper structures) you would hope to get better
segmentation than in the T1, though this isn't related to setting the
-T1 flag. You might also try multi-channel segmentation.
Cheers.
On 27 Sep 2007, at 18:01, Matt Glasser wrote:
> Hi,
>
>
>
> I seem to get identical results with FAST no matter what modality
> switch (-t1, -t2, -t3, -t 1, -t 2, -t 3). This is fine for
> segmenting T1 images, because that is the default, however T2
> images and proton density images don’t produce very good results,
> even though they often show better contrast between tissues like
> motor cortex and the basal ganglia. Is this a bug?
>
>
>
> Thanks,
>
>
>
> Matt.
>
>
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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)
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