 |
 |
Hi, By combining functionally defined masks from three different groups (by taking the logical OR), I have constructed composite masks that I would now like to 'Featquery'. I see that is very straight forward to compute the overall % signal change or to count the number of voxels with z values exceeding a given threshold within these composite masks for each individual, but is it possible to combine both measures and calculate the mean % signal change in only those voxels within the composite mask that exceed a given z value threshold? This is necessary because the size of the composite masks makes for very low mean % signal change values (0.04, for example). Any ideas would be gratefully received. Dan.