Table 2. Dielectric properties of skin tissues at 0.45 THz. The dielectric values are derived from data from refs. [35–44] and the analysis of tissue component and water mixing formulae [37,45,46]. The tissue densities, heat capacity and thermal conductivity are based on Hasgall [47] and for Stratum Corneum based on Dias [48]. The Stratum Granulosum and Strum Lucidum were considered to be equivalent to the 40% hydrated Stratum Corneum.
| ɛ’ | ɛ" | Electrica Cond.(σt) | Ref. Index (n) | Tissue Density(ρt) | Heat Cap. (ct) | Therm. Cond. (kt) | |
|---|---|---|---|---|---|---|---|
| Model Layer | Sm-1 | kgm-3 | Jkg-1K-1 | Wm-1K-1 | |||
| SC hydrated 15%, “dry” | 3.0 | 1.0 | 25.0 | 1.76 | 1300 | 1800 | |
| SC hydrated 23% | 3.2 | 1.3 | 32.5 | 1.82 | 1260 | 2200 | |
| SC hydrated 30% | 3.4 | 1.5 | 37.6 | 1.89 | 1230 | 2500 | |
| SC hydrated 40% “wet” | 3.7 | 1.8 | 45.1 | 1.98 | 1200 | 2800 | |
| Stratum Spinosum | 4.1 | 2.3 | 57.6 | 2.10 | 1060 | 3600 | |
| Stratum Basale | 4.4 | 3.2 | 80.1 | 2.22 | 1060 | 3600 | |
| Dermis | 4.0 | 3.1 | 77.6 | 2.21 | 1080 | 3430 | |
| Blood | 1057 | 3600 | |||||