Dear List We performed single subject ICA analysis on 23 subjects, then sorted IC maps of each subject acording to "task-relatedness" of the timecourse. In a second step "task related" IC maps went into another ICA using command line melodic (variance normalization = off) , resulting in a new set of task related ICs. So far so good. But now, we are not able to overlay the "2ndlevel" IC-maps on a structural image (e.g. mni-template) to identify anatomical structures. We also tried to co-register these images in various ways, but never ended with a reasonable result. Does anyone have an idea how to co-register IC-maps to a structural image without having "filtered_func_data"- file as input? Cheers Andreas