After the transfer from the PVIEW tool the voxel-wise TACs are arranged in the Region list labeled with the VOI name followed by the voxel coordinate in the image. As for average TACs, the blood and plasma data have to be loaded, or a reference approach used.
The whole PKIN functionality is then available for modeling. For instance, a few TACs can be averaged, a 1-tissue compartment model fitted as illustrated, propagated to all TACs using Copy to All Regions entry Model & Par, and fitted with Fit all regions.