iobenguane i-131

Right.

Regardless of location, though, we rely on MIBG or DOTATATE scans to localize them.

And we must apply the classic ten percent rule for pheochromocytomas.

Oh, yes.

And so you need to talk to your doctor to do a medication assessment to see if you are on any medications that could interfere with that scan.

Another possible scan is MIBG scintigraphy.

Basically, when the nerves affected in Parkinson's disease are the nerves to the heart, we can see some changes with those nerve activity.

And so we inject, again, a little bit of a radioisotope, and we're able to see whether the nerves are communicating with the heart well enough.