Background suppression timings

9 control slices shown for an 2D EPI PCASL sequence with 2 background suppression pulses that were timed suboptimal, showing an overview of background suppression timing effects. All slices are shown with same a.u. scaling. Note that the CSF suppression is most effective at the first slice, tissue suppression is optimal around slice 4, and GM-WM contrast suppression most effectively around slice 7, which is the aim of background suppression.