Abstract
The absorption spectrum of collagen powder was measured between 630 and 1000 nm. Absorption spectra of breast from healthy volunteers were then interpreted adding collagen to the other absorbers previously considered (i.e. oxy- and deoxyhemoglobin, water, and lipids). Collagen accounts for 5% to 30% of breast volume, depending on breast type and measurement geometry. The presence of collagen in the fitting procedure affects significantly the estimated concentration of other tissue constituents, and related physiological parameters.
© 2006 Optical Society of America
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