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Fig. 2 —When two PET/CT studies are being compared, patient usually
has been scanned in different position. To compare studies slice by slice,
there is facility to offset slices, so that as transaxial slices are scrolled,
there is direct correspondence between two linked studies. As user scrolls
through linked studies, at any time offset can be applied to ensure that
slices are comparable. This often is necessary if chin is down on one study
and up on second study.
