I would like to reduce a 3D+timeseries brik to include only Z images involved in specific event-related contrasts (e.g. base and condition 1, omitting images throughout the brik which are involved in different conditions). Then, using afni, I could view the intensities for these conditions (e.g., base vs condition1), and view how well the reference function relates to the actual time series. I know that 3dzcut can be used to cut z slices ( although it seems to only want to keep contiguous images), and that imcat can be used to patch them together into a single brik. thus, using a shell, I could cut and cat the images I want into a file. But, I was wondering if there is a utility that would open an existing timeseries specification text file and only include in the output brik images labelled 0 and 1, for instance? Images labelled >33333 (per usual) would not be included... thanks, Margaret Bradley