Hi Thomas! Thanks for your mail! Does the code for zeroing NaN values also
work for spm2? Somehow it crashes after spm_create_images?
I also normalized my subjects to a customized kids template (but run into
the same problem because the mask image is much much smaller than the
template). Could this be due to the NaN values?
Thanks
nadine
Nadine,
>
>> Hello! I have the same problem than previously reported in 2002 (see
>> mail below). I would appreciate any advice how to handle the problem.
>>
>>>> We have been examining the mask.img produced from a second level
>>>> random effects analysis (one-sample t-test) across 14 subjects.
>>>> We find it a bit alarming to see that the mask.img falls well
>>>> within the perimeter of the MNI template brains in all 3
>>>> dimensions.
>
> I'm afraid there isn't much to add to the original thread; take a look
> at the original message
> http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind02&L=SPM&P=107309
> and all of the responses. In particular, see Dan's response about
> checkign for dud scans due to movement.
>
> One other idea, if you smooth your contrast images *or* if
> you spatially normalize contrast images (done if intrasubject analyses
> are done in subject space instead of atlas space), then you could be
> experiencing NaN problems. If you either smooth or interpolate
> contrast images you need to change NaN's to zero. For more on that
> see
> http://www.jiscmail.ac.uk/cgi-bin/wa.exe?A2=ind03&L=SPM&P=R232392
>
> -Tom
>
>
> -- Thomas Nichols -------------------- Department of Biostatistics
> http://www.sph.umich.edu/~nichols University of Michigan
> [log in to unmask] 1420 Washington Heights
> -------------------------------------- Ann Arbor, MI 48109-2029
>
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