| Breast Layer | Mass Density (kg/m3) | Relative Permittivity (unit-less) | Conductivity (S/m) |
| Skin | 1100 | 36 | 4 |
| Fat | 900 | 9 | 0.4 |
| Glandular | 1040 | 14 | 0.45 |
| Tumor | 1040 | 50 | 4 |