Hi Patty,
I do not have yearly Pet Scans, Biopsy's or Chest x-rays. I see my ENT and RO once a year (spaced so I see one of them every six months).
When I was a year out like you I think I was seeing someone every 4 months. My RO does a scope and they both check for any changes. If I am worried about anything at all then they will schedule an MRI, so far I have had two.
Hope this helps a little.