Hi Tim,
Sorry - I wasn't clear - the zero.img had the correct voxel sizes (1mm). It looks like flirt has halved the voxel size and fit as many voxels as it could into the new volume without resampling them. Is that right? Maybe, since the input and output images have different volumes (182*218*182 vs 157*189*136) I can't do this without actually normalising to a brain? I think this would change the template image sufficiently that I would no longer be comparing like with like (for clarification, I've run some routines in FSL that I'd previously run in SPM and want to compare them. SPM's templates are 91*109*91 but it outputs at 157*189*136).
Any suggestions would be great,
thanks,
Clare.
>>> [log in to unmask] 02-07-2002 15:38:41 >>>
Hi there
Your reference image (zero.img) should have the same dimensions AND voxel
size as your desired output, so your reference image should have
dimensions 157 189 136 and voxel size 1mm isotropic.
this should then work - you should also think aboput what interpolation
scheme you want to use (you can change this with the -interp option)
hope this helps
cheers
Tim
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Tim Behrens
Centre for Functional MRI of the Brain
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