afni.nimh.nih.gov

Hello,

We have collected some fmri data using arterial spin labelling. This involves collecting tagged and untagged scans and then doing a subtraction. For instance, 0-1, 2-3, 4-5, etc. So, if you start off with 200 time points, the actual functional dataset after the subtractions would consist of 100 time points.

I'm wondering if there is a way to do this with 3dcalc without first creating all the intermediate files and then concatenating them together.

Thanks for your help!