Fig. 2.

Chromophores used in the fitting routine to approximate near-infrared absorption spectra in cardiac tissues. All spectra were obtained from previously published literature. Water (H₂O)^a; oxyhemoglobin (HbO₂)^a; deoxyhemoglobin (Hb)^a; lipid^b; reduced oxymyoglobin (Mb)^b; met-myoglobin (met-Mb)^b; oxymyoglobin (MbO₂)^b; and collagen^c; ^a-Obtained from Jacques et al.; ^b-Obtained from Bowen et. al.; ^c-Obtained from Taroni et. al.