Karen,
I'm glad you have this surgery and treatment behind you, and recovering well.
I have an extensive history of head and neck cancer, tonsil primary, with multiple recurrences, multiple neck dissections, including internal and external carotid artery sacrifice in left neck, and multiple rounds of chemo and radiation therapy. I just had a scheduled 6 month contrast MRI, which scan, and prior PET/CT were clear for the 3rd time. A PET/CT is planned in 6 months.
I hope this helps.