Table 1 Values for the various parameters of the liver tissue
From: Identification of the blood perfusion rate for laser-induced thermotherapy in the liver
Parameter [unit] | Value |
|---|---|
general | |
tissue density ρ [kg/m3] | 1.08 × 103 |
universal gas constant R [J/(mol K)] | 8.31 |
total laser power \(\hat{q}_{\mathrm{app}}\) [W] | 22 |
\(t_{\mathrm{on}}\) [s] | 25 |
\(t_{\mathrm{off}}\) [s] | 1175 |
end of treatment \(\tau _{{\mathrm {end}}}\) [s] | 1200 |
perfusion rate in a blood vessel \(\xi _{\mathrm{max}}\) [W/(K m3)] | 6 × 104 |
thermal | |
heat conductivity κ [W/(m K)] | 0.48 |
specific heat capacity \(C_{p}\) [J/(m K)] | 3.69 × 103 |
heat transfer coefficient \(\alpha _{{\mathrm {cool}}}\) [W/(K m2)] | 250 |
heat transfer coefficient \(\alpha _{{\mathrm {amb}}}\) [W/(K m2)] | 0 |
coolant absorption factor \(\beta _{q}\) [1] | 0.14 |
initial temperature \(T_{0}\) [°C] | 21.8 |
cooling temperature \(T_{{\mathrm {cool}}}\) [°C] | 20 |
blood temperature \(T_{{\mathrm {b}}}\) [°C] | 21.8 |
ambient temperature \(T_{{\mathrm {amb}}}\) [°C] | 21.8 |
optical (native) | |
absorption coefficient \(\mu _{an}\) [1/m] | 50 |
scattering coefficient \(\mu _{sn}\) [1/m] | 8 × 103 |
anisotropy factor \(g_{n}\) [1] | 0.97 |
optical (coagulated) | |
absorption coefficient \(\mu _{ac}\) [1/m] | 60 |
scattering coefficient \(\mu _{sc}\) [1/m] | 3 × 104 |
anisotropy factor \(g_{c}\) [1] | 0.95 |
tissue damage | |
frequency factor A [1/s] | 3.1 × 1098 |
activation energy \(E_{a}\) [J/mol] | 6.28 × 105 |