Hi - there may be a few things going on here. Could you start by looking
at the registration report page for each first-level analysis (click on
the summary registration overlay image towards the bottom of the
first-level FEAT output web page). Do all stages look like they worked ok?
Cheers.
On Mon, 8 Mar 2004, Jane Aspell wrote:
> Hi
>
> Thanks for all the previous help. I've a question about rendering in higher
> level analysis...my lower level feat directories are all from a single
> subject and in the higher level analysis i want to render the activations
> onto the high res structural image for this subject. i chose the render onto
> 'first highres' option as i thought that would achieve this. when i open the
> resulting 'rendered_threshzstat1.hdr' for example, it seems that is has used
> the correct image but it looks distorted - the frontal and occipital cortex
> look squashed. the image also looks blurred.
> i wanted to overlay some masks i have from a retinotopic scan onto the high
> res image showing activations. the masks show the location of the lower
> visual areas and they normally overlay onto the same sturctural image that i
> selected for the higher level analysis but i am not able to put together the
> high res, the activations and the masks at once -'cannot load incompatible
> overlay'.
> can you explain why the subject's high res seems to have been distorted by
> the higher level analysis and why i can't overlay my masks onto the highres
> image showing activations?
>
> thanks very much
>
> Jane Aspell
>
Stephen M. Smith DPhil
Associate Director, FMRIB and Analysis Research Coordinator
Oxford University Centre for Functional MRI of the Brain
John Radcliffe 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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