based on the contact version it's more traditional and it's better developed there's yeah please mm-hm so right now for breast cancer image in extra mammography is still the gold standard so we're still sticking with that one there are two types of directions that our field is taken one is to supplement extra mammography because x-ray mammography you know as since it's as sensitive as it is they have trouble with young women with reader graphically dense breast so where they really feel miserable the other flaw with x-ray mammography is the very