Fully finished the PET->Anatomy registration workflow with full integrated User Interface.  In this experiment a  344x344x128 volume with 203 timepoints (original DICOM is 5.83 GB).
It was registered to the MPRAGE with 256x256x160.

Two registration modes were used:


Quick (Nearest neighbor final result), total time 79 sec, combined registered (PET+MRI) file = 496 MB.
Regular (Linear interpolation), total time 217 seconds,  combined registered (PET+MRI) file = 653 MB.