Cherenkov emission spectra as a function of absorption coefficient at 665nm, μa,665nm = (a) 0.1 cm−1, (b) 0.3 cm−1, (c) 0.5 cm−1, (d) 0.7 cm−1, and (e) 1 cm−1, and reduced scattering coefficient at 665nm, μs’665nm (from bottom to top: 5 cm−1, 10 cm−1, 15 cm−1, 20 cm−1, and 40cm−1). Iche,λ is defined as ∫∫∫ Cem(r, θe, λ, z0)rdrdθdz.