Pet scan VS. Booster Shot

Two weeks ago I had a pet scan, I am looking for anyone who is familiar with the scan.  I had a booster shot Monday & Tuesday then the pet scan on Wednesday.  The result of my scan showed my bones let up like a Christmas Tree.  The people doing the scan was unaware I recently had Boosters that week.  So I am concerned the material they injected 45 minutes before the scan went only to my bone marrow because of the booster.  Is this possible?  My scan results came back no evidence of recurrencts or resideual adenopathy.  I am hesitant to believe the impression from the office.  I feel a new lump on my neck and continue to feel the mass under my arm still.  I am curenlty on my 8 treatment for HL stage 3 B.  I would appreciate any insight on this matter ?   

Thank you