Hi All, If you pass an 4D image to slicer, does it mean over the temporal dimension before creating the png? I ask because we were looking at two slicer outputs that should have been the same data, where one was in Analyze format (passed in a single volume) and the other a 4D nifti, and the nifti image appeared to have much better contrast to noise. (I know nifti is better, but I didn't think *that* was one of the virtues!) Can you think of anything else that would account for this? Michael