Jen, more than a few times here we have suggested a second opinion. That said, If you are being seen at a top cancer center, I don't think you need to worry or second guess the radiation protocol. The radiation oncologist is already looking out for your best outcome. The scans (CT PET ect) cannot see microscopic cancer cells. Those cells can develop into tumors later on. By using a wider field radiation they are planning to "get them all". As Glenn said you want to be as aggressive with this as possible.

We will be here for you as you proceed on the path towards survival. Radiation is no picnic but you will do fine. Start eating extra good food now, build up some reserve weight especially if you are normal weight or less now.

Remember this is a life event that will affect all of your family in some way, spouses especially. You will experience many positive things as you go through this. Try to look for them.

Take care