Thanks girls for your comments. Yes I do wonder what the effects of this radiation will be long term and maybe in years to come they won't do it at all because some believe that it, along with radiation emitted from mamograms, actually causes cancer. But you know what the alternative is if we don't have any treatment? see here - (but don't look if you're squemish though!!)..... https://www.google.com.au/search?q=google+images&rlz=1T4NDKB_enAU551AU552&source=lnms&tbm=isch&sa=X&ei=GKqbU4v8HsWwkAXwg4C4Bg&ved=0CAgQ_AUoAQ&biw=1219&bih=855#q=untreated+breast+cancer&tbm=isch