Attempting to correct Elastic (quadratic) transform on the 3D->3D liver registration. For some reason function is not performing as in the past.

After registering the Liver in 4D,  returned back to Axial projection.  Specified the Macroseed (green box on the right) over the portal vein.  Then ran fully automatic vessel (IDIF) segmenter.  (Peak time eps=30 sec, Vessel diam=10mm).  Resulting ROI is shown on Axial and Sagittal projections in Blue.
Corresponding Input function is displayed in concentration units as in the Sourbron's paper.

Registration:
Converted DCDI-(Dual Compartment Dual Input) Eovist Liver dataset to the isotropic sagittal.  For Registration purposes sagittal projection seems to be more suitable due to the liver motion mostly perpendicularly to the axial plain (is this true?). So it is easier to evaluate registration  quality.  Additionally, it is easier (at least for unexperienced in-anatomy users) to outline liver ROI in sagittal view (is this true?)

Question: after registration, for the remainder of the workflow, should we return to the axial projection? I assume yes, due to the higher resolution in the axial plain and further presentation of the results.