This should help you 


> Date: Fri, 13 May 2011 10:54:33 +0100
> From: [log in to unmask]
> Subject: [SPM] viewing individual slices for a single volume
> To: [log in to unmask]
> Dear SPMers,
> Is there a way to view each individual slice of a functional volume at the same time? This seems like something that should have a straight-forward solution, but I cannot figure it out. Perhaps this is not possible within SPM?
> Any help would be greatly appreciated.
> Regards,
> Patrick