Dear members of the list, I want to use one segmented structural image series (img1: CSF, white matter, grey matter) to oppose to another (coregistered) image series (img2: has poor grey/white contrast itself), to obtain segmented images from img2. I already have the segmented img1. I assume it's possible to do this, probably with ImCalc. I'm pretty new on SPM, and cannot find the right way. Anyone has experience with this? Best regards Stefan Steens Leiden University Medical Center Leiden, the Netherlands