Hi @Temple
I too was very worried about rads once I realised that I was expected to lie half-naked on the machine with my arms up. Thankfully, I found out this bit of info before I started and I purchased some 'baby blankets' (Kmart $10 for 3) and took one in with me each day. I was able to cover myself up during the actual radiation part. When they were setting me up, some staff seemed to take delight in making me feel as vulnerable as possible and others set me up without exposing my chest at all (just lifting the blanket a little to put the bolus on my chest and do the measurements).
They really don't understand (some do try though) how the whole process makes one feel.
My thoughts will be with you, it will be done before you know it.
Hugs
LittleBlueWren