Hi,
On 15 Aug 2007, at 19:16, James N. Porter wrote:
> Hello-
>
> I'm having an odd error with Featquery. For one subject in my
> sample everything seems to not work properly when passing in a
> mask. For example, in one instance I specify a mask that is 51
> voxels in size, and everybody but this one subject spits out a
> featquery report that has '51' in the voxels column.
What space is the mask in? If it's in standard space I would have
thought that this would corresponding to slightly different numbers
of voxels in different subjects, and if it's in native (example_func)
space, then I would have thought that it wouldn't be aligned with all
the subjects?
> This subject reports on 9265 voxels instead. The situation is the
> same, no matter what mask I pass in, with the problem subject
> wildly inflating the number of voxels to report upon.
You should check in detail the registration results for this subject,
as well as its mask image and stats images (cope* etc.).
Cheers, Steve.
> The thing is, every step of my analysis from pre- to post-
> processing has been performed with for each loops, so everybody has
> been given exactly the same set of commands from dinifti through
> featquery. Does anybody have any ideas why this one subject would
> have this problem?
>
> Thanks,
>
> --
> Jim Porter
> TRiCAM Lab Coordinator
> Elliott Hall N437
> 612.624.3892
> www.psych.umn.edu/research/tricam
------------------------------------------------------------------------
---
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
------------------------------------------------------------------------
---
|