Dear Haopei,
SPM will also discard voxels whose time course is constant:
https://github.com/spm/spm12/blob/r7771/spm_spm.m#L582-L597
Could it be what is happening for you at some voxels out of the field of
view after normalisation?
Best regards,
Guillaume.
On 01/03/2021 02:41, Haopei Yang wrote:
> Dear experts,
>
> I realized that I have quite some NaNs in my beta images from a GLM estimation. I understand that those typically represent voxels outside the brain. However, I still got some NaNs after setting "matlabbatch.spm.stats.fmri_spec.mthresh=0", which to my understanding should get rid of the implicit mask. I am also not using any explicit mask. Why would I still get NaN in this case?
>
> Thanks,
> HY
>
--
Guillaume Flandin, PhD
Wellcome Centre for Human Neuroimaging
UCL Queen Square Institute of Neurology
London WC1N 3BG
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