You have interpreted this correctly. If it makes you feel any better, I had marginal hyperactivity in various areas at or near my primary for 18 months.

Of course I was panicked about this every scan, but what I learned to accept was this - for most people, it is a function of treatment related healing which is also hypermetabolic. In my case most of this was not superficial, so I could never have the satisfaction of a simple biopsy to put my mind at rest. Even if it had been, my docs said that doing a punch biopsy and other procedures on tissues already thin and which were poor healing risks from radiation, would likely create non healing areas that could cascade into chronic infection sites. So I had to believe and trust that this was going to get better as time went by, which it did. But every scan put my nerves on edge.