I have been running into some problems when generating contrast maps for
individual subjects. When viewing individual subject contrast maps
there are occassionally small areas with no Beta values estimated. In
one subject, a relative large portion of the most posterior visual
cortex has no values estimated. In looking at the functional images
there does not seem to be any grossly obvious problems in these
regions. Can someone please provide some possible explanations for
these missing data values and how they are typically handled?
Thanks,
Dustin
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