Steve,
Do coreg->reslice only. Choose the contrast image as your "target" and
the roi as the "object". That will make a new image called rroi,
assuming the previous was called roi. Next you need to turn back into a
binary image (0s and 1s). Do "imcalc" pick rroi, give a new name (such
as irroi), for the math choose "i1>0".
Your new image irroi will have the same resolution as your contrast...
This is all assuming they are coregistered to the same space as well.
Robert
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Robert C. Welsh, PhD
Research Investigator
Department of Radiology
University of Michigan
(734) - 764 - 2412 (fax)
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>>> Steven Lacey <[log in to unmask]> 05/05/06 7:30 AM >>>
Hi,
I have the following problem. I want to use an roi image in my analysis,
but
I don't know what space the roi is in. I know my data is in MNI space. I
assume the roi is in MNI space, but would like to check. How would I go
about this?
If there is no easier answer to that question, let's assume the roi is
also
in MNI space. I still have a problem in that the dimensions, voxel size,
and
origin of the roi is different than my contrast images.
dimensions Voxel Size origin
roi 91 x 109 x 91 2 x 2 x 2 46 x 64 x 37
contrast 42 x 51 x 28 3.75 x 3.75 x 3.75 22 x 31 x 11
Do I need the roi to match my contrast on these parameters to use it as
a
mask or in a small volume correction using spm99? If so, how would I go
about getting the roi and contrast images to match on these?
Thanks,
Steve
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