Hi, I am thinking of moving my study to a different site, with a different scanner for practical reasons. Do people have opinions on whether this is acceptable or not and are there ways to account for variances in things like signal to noise between scanners? cheers, chris Christopher-J. Harvey Ph.D. Student Direct line: +44(0)141 232 7699 Fax: +44(0)141 232 7566 http://www.glasgowsleepcentre.co.uk University of Glasgow Sleep Centre Sackler Institute of Psychobiological Research Section of Psychological Medicine Southern General Hospital Glasgow G51 4TF, Scotland, UK.