Antou, if you think the radiation would make you feel better, and the doctor says it's an option, then you should consider it. Be aware, though, that it does come with some pretty significant possible side effects, including burns and tremendous fatigue. With DCIS and clean nodes, plus a mastectomy, I'd think your chance of recurrence would be close to 0%. So going without radiation would be something you should consider seriously, too. Good luck - PJH