Table 1.
Literature on the optical properties of blood in the visible and near-infrared
| Reference | Wavelength range (nm) | Method | Sample | Optical properties |
|---|---|---|---|---|
| Zijlstra et al. [4] | 450–800 | Transmission spectrophotometer | Hb solution from haemolysed RBCs (human); SO2 = 0, 100 %; T = 20–24 °C | μa |
| Prahl [5] | 250–1,000 | Compiled data from Gratzer and Kollias | Hb solution from haemolysed RBCs; SO2 = 0, 100 % | μa |
| Yaroslavsky et al. [6] | 700–1,200 | Double IS with inverse MC (PHG) | Fresh heparinized whole blood (human); hct = 45–46 %, SO2 > 98 %; no flow, γ = 0 s−1 | μa, μs, g |
| Roggan et al. [7] | 400–2,500 | Double IS with inverse MC (PGK) | Fresh RBCs (human) in phosphate buffer; hct = 5 %; SO2 = 0, 100 %; in flow, γ = 500 s−1; T = 20 °C | μa, μs, g |
| Friebel et al. [8] | 250–1,100 | IS with inverse MC (PRC) | Fresh RBCs (human) in phosphate buffer; hct = 0.84, 42.1 %; SO2 > 99 %; in flow, γ = 600 s−1; T = 20 °C | μa, μs, g |
| Friebel et al. [9] | 250–2,000 | IS with inverse MC (PRC) | Fresh RBCs (human) in phosphate buffer; hct = 33.2 %; SO2 = 0, 100 %; in flow, γ = 600 s−1; T = 20 °C | μa, μs, g |
| Meinke et al. [10] | 250–1,100 | IS with inverse MC (PRC) |
Fresh RBCs (human) in phosphate buffer and saline solution/plasma various samples between hct = 0.84 and 42.1 % (shown in Figs. 1, 3 and 4: hct = 8.6, 41.2 %); SO2 > 98 %; in flow, γ = 600 s−1; T = 20 °C |
μa, μs, g |
PGK and the PRC are identical phase functions [34].
IS integrating sphere, MC Monte Carlo, PHG Henyey–Greenstein phase function, PGK Gegenbauer–Kernel phase function, PRC Reynolds–McCormick phase function, RBCs red blood cells, hct haematocrit, SO2 oxygen saturation, γ shear rate, T temperature, μa absorption coefficient, μs scattering coefficient, g anisotropy factor
aThe μa spectra of Roggan are excluded from the compiled spectra, as discussed in ‘Compiled literature spectrum of μa’ section