Your second method wouldn’t work as is, because the con images don’t contain p-values, just parameter estimate contrasts. The spmT images contain T-values, so if you find the critical T-value for your degrees of freedom and p=0.05, and then threshold with i1>critT you would have a binary mask. But saving an already thresholded mask as a binary image should work just the same.
--
Mike Angstadt
Research Computer Specialist / PANLab Lab Manager
Department of Psychiatry / University of Michigan
(734) 936-8229
From: SPM (Statistical Parametric Mapping) [mailto:[log in to unmask]] On Behalf Of Alexandre Obert
Sent: Monday, February 06, 2017 3:25 AM
To: [log in to unmask]
Subject: [SPM] Contrast binary mask
Dear all,
I would like to create a binary mask of an activation map (at p = 0.05) from a computed contrast but I don't really know how to create it:
1) Saving an activation map as a "all clusters binary" image at a p = 0.05 threshold
2) Using the I1>0.05 function in ImCalc with the con_0001.nii file as an input?
(I don't really understand the differences between these two processes...?)
3) Any of these two process...
Regards,
Alexandre
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