Dear FSL experts,
contrast of parameter estimate (COPE) represent the final images in FEAT fMRI data analysis, I understand that are calculated by performing simple algebra on the EV parameter estimates. For example, for the contrasts 1 -1, the contrast parameter estimate is calculated by subtracting the parameter estimate for EV 2 from the parameter estimate for EV1. The COPE image will show regions in the brain in which this difference is large. (http://fsl.fmrib.ox.ac.uk/fslcourse/lectures/practicals/feat2/index.html). My questions is:
The cope images contain negative and positive values. Is there any way to convert these images to another type of images that contain only positive values?
Thank you for any clarification
john.
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