Table 1.

Optical properties of background 0.6 % Intralipid and Cy7 dye. The absorption coefficient is μ_a, ${\mu }_s^{\prime }$ is the reduced scattering coefficient, and ε is the extinction coefficient. Maximum extinction coefficient of Cy7 in water is 0.20 cm⁻¹ μM⁻¹ at 747 nm.

μa,690	μa,776	${\mu }_{s,690}^{\prime }$	${\mu }_{s,776}^{\prime }$	ε690	ε776
0.013 cm−1	0.019 cm−1	6.5 cm−1	5.25 cm−1	0.20∕3.07	0.20∕2.85