Figure 4From: Optical breast cancer margin assessment: an observational study of the effects of tissue heterogeneity on optical contrastHistograms of the percent composition of the three main normal tissue types. The fibro-glandular (FG), fibro-adipose (FA) and adipose (A) sites were stratified by (A) pre-menopausal sites and (B) post-menopausal sites.Back to article page