Which gives a more definitive result for panreatitis problems/damage(necrosis) a CT scan or MRI?

By far the best scan for this patient would be the MRI.
MRI scans show much more detail concerning the vasculature than CT scans do. As a matter
of fact, sometimes the vessels on CT can't be visualized at all. CT scans are more
useful with hard, boney structures. If the pancreas is thought to be necrotic (dead),
the patient is a candidate for an angiogram, ERCP, and MRI (magnetic resonance imaging).
Soft tissues, like the pancreas, and associated blood vessels are better visualized with
the MRI scan. Further, if CT scan was employed, it would have to be a scan with
contrast. If the pancreas is necrotic, the patient wouldn't be able to tolerate the
contrast media anyway.