166
M. Hülsbusch and V. Blazek
The albedo can be calculated as:
a =
μ s
μ a + μ s
(10.8)
The mean free path in two kinds of scattering process m f p = 1/μ t and m f p
=
1/μ
t is often used.
The penetration depth δ. The knowledge of the optical properties also makes
the determination of the penetration depth in tissues possible. The penetration can
be defined as:
δ =
1
√
3μ a (μ a + μ s (1 − g))
(10.9)
10.3 The Reasons of the Absorption and Scattering
The absorption and scattering character of the human tissue depend strongly on
the applied wavelength (Fig. 10.3). The important absorbers are water (>1.4 μm
wavelength) and hemoglobin. In addition, the absorption coefficient also depends
Fig. 10.3 Optical parameters of the skin in vivo and water in the UV, VIS and near-IR region of
the spectrum [3]
M. Hülsbusch and V. Blazek
The albedo can be calculated as:
a =
μ s
μ a + μ s
(10.8)
The mean free path in two kinds of scattering process m f p = 1/μ t and m f p
=
1/μ
t is often used.
The penetration depth δ. The knowledge of the optical properties also makes
the determination of the penetration depth in tissues possible. The penetration can
be defined as:
δ =
1
√
3μ a (μ a + μ s (1 − g))
(10.9)
10.3 The Reasons of the Absorption and Scattering
The absorption and scattering character of the human tissue depend strongly on
the applied wavelength (Fig. 10.3). The important absorbers are water (>1.4 μm
wavelength) and hemoglobin. In addition, the absorption coefficient also depends
Fig. 10.3 Optical parameters of the skin in vivo and water in the UV, VIS and near-IR region of
the spectrum [3]