Hi,
Yes - that's what the "Threshold stats images as well as masking"
button is for.......sorry it's so confusingly named ;-)
Cheers.
On 10 Mar 2009, at 14:01, Daniel Shaw wrote:
> Hi,
>
> By combining functionally defined masks from three different groups
> (by taking the logical
> OR), I have constructed composite masks that I would now like to
> 'Featquery'.
>
> I see that is very straight forward to compute the overall % signal
> change or to count the
> number of voxels with z values exceeding a given threshold within
> these composite masks
> for each individual, but is it possible to combine both measures and
> calculate the mean %
> signal change in only those voxels within the composite mask that
> exceed a given z value
> threshold? This is necessary because the size of the composite masks
> makes for very low
> mean % signal change values (0.04, for example).
>
> Any ideas would be gratefully received.
>
> Dan.
>
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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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