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November 26, 2002 01:41PM
I have just used 3dmaskave to get some average response measures for voxels from a particular ROI, and the number of voxels that I am told made up the average is much larger (like 5X) than it should be (based on my manually manually counting them when I look at the mask in afni).

The input dataset and the mask are both +orig files. However, the mask was created by fractionalizing (if that's a word) an ROI originally drawn on a +tlrc dataset.... does this have something to do with the inflated voxel counts? If not, what is going on here?
Subject Author Posted

3dmaskave - and 3dfractionize?

Liz Roy November 26, 2002 01:41PM

Re: 3dmaskave - and 3dfractionize?

bob cox November 26, 2002 03:32PM

Re: 3dmaskave - and 3dfractionize?

Liz Roy November 26, 2002 04:16PM

Re: 3dmaskave - and 3dfractionize?

bob cox November 26, 2002 04:38PM



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