Dose Course 2018_Flipping book

Tissue composition • How accurate are published ‘reference’ tissues? • Variability over population? • Variability with age (breast) • The myth of the 50-50 breast (Yaffe et at MP 2009)

Afsharpour et al PMB 2011

Breast was long assumed: 50% adipose, 50% gland (brighter above)

Reality: mean composition is much closer to 80% A / 20% G