Steve:
Thanks, but is there any way to figure this out?
It must somehow be set improperly for BOLD but
not for T1 images. Is there an algorithm I can use to check it?
Darren
At 03:30 AM 10/10/2005, Stephen Smith wrote:
>Hi - this sounds strange - maybe there's a strange interaction with the
>scl_inter and scl_slope settings in the header? FSL deals with these by
>initially resetting these to the defaults and scaling the actual data
>accordingly...
>
>Cheers, Steve.
>
>
>On Mon, 10 Oct 2005, Darren G wrote:
>
> > Hi:
> >
> > I tried using BET for skull stripping BOLD images and it produced an image
> > that was skull stripped but the voxels values
> were around 10^8. The original
> > values were around ~400-500. The image was generated in spm5b and so is a
> > nifti hdr+img. FSLview seems to read the original image correctly with the
> > proper voxel values, and it also shows the skull stripped image with the
> > wrong values. However, BET produces correct
> values when skull stripping a T1.
> >
> > Thanks,
> > Darren
> >
>
>--
> 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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Darren R. Gitelman, M.D.
Cognitive Neurology and Alzheimer¹s Disease Center
Northwestern Univ., 320 E. Superior St., Searle 11-470, Chicago, IL 60611
Voice: (312) 908-9023 Fax: (312) 908-8789
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