PET Scan

Cannot find this information anywhere.

Generally, after a nuclear medicine procedure, it is advisable to quarantine a patients body fluids for 4 half-lives.

F18, the isotope used for pet scan, has a half life of just under two hours. Patients routinely undergo procedures immediately after a PET scan.

Is there any recommendation for any quarantine at all following PET scan?

Not really a big issue. This from NHS Choices:

They do also add this though: "*Close contact with pregnant women, babies or young children should be avoided for a few hours after having a PET scan. *
http://www.nhs.uk/conditions/PET-scan/Pages/Introduction.aspx

As an anecdote, a friend of mine who was breastfeeding at the time of her PET (not a PET/CT) was told to pump and dump a couple of times before feeding again, and these are her quotes, supposedly from the nurse: “just to be on the safe side.”