Currently my lab is looking at fMRI activation during language tasks. Right now we look at statistically significant voxels using p values (p=0.05. 0.01, 0.001) that I change manually on the GUI after an overlay and underlay have been set. In the same GUI, how could I change the threshold to only show the top 10% of activated voxels?
Just raise the regular threshold slider to the point you want. The power of 10 control is ignored so that values from 0-1 on a power of 10 of 1 corresponds to 0-100%, and a power of 10 of 1 gives the same percentile range of 0-100. Likewise for all power of 10 values. Easier to try than to explain here.
Your image didn’t attach properly, but I think it’s relatively straightforward. You can use the Histogram plugin or 3dhistog to look at the distribution of your data. You could also use a command like this to find the threshold:
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National Institute of Mental Health (NIMH) is part of the National Institutes of
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