Becky

Don't forget that I am NOT a doctor so I just have general opinions on BOT based on my own experience and reading. What counts is how the treatment takes care of the cancer.
You can look at the guidelines yourself at OCF
NCC guidelines BOT is on pages 18 to 22 of the pdf file. It's unclear to me what size your husband's tumor was (T1, T2,T3 etc) or how many lymph nodes (N2. N3 etc) the cancer had spread, so my comments were based on an assumption that like most of us, his cancer was not discovered early. But we all know how bad assumptions are.
If your husband had a T1, and no adverse features on a positive node, page 19 shows "definitive Radiation TX" as an option without the chemo. My bad in jumping to the conclusion that he was page 20 like myself which does recommend concurrent chemo.
Bottom line: just ask your doctor where your husband fell within the guidelines and you will know better.
Sorry to have jumped the gun and hope the Petscan is all clear.
Charm