Hi Kazza, they did a cat scan yesterday, so don't know until next Tuesday what sort of machine they use for the radiotherapy. The technicians used sticky type tape with metal markers, and then used a text a to mark under my armpit and around the wound. They lined up my sternal notch with texta arrow (looked like this way up lol) then they did little pin pricks and they were the tattoo markers that help them be accurate when directing the Rays. I guess I'll know more on Tuesday about how close the machine gets to your face. Will let you know next week, Trace ??