Table 1.
Dielectric properties of the mapped head tissues at the 1 GHz frequency.
| s. no. | organ/tissue type | relative perm. (εr) | conductivity σ ( S m−1) | model type |
|---|---|---|---|---|
| 1 | air/free space | 1 | 0 | fourth-order Debye |
| 2 | skin (dry) | 39.6666 | 0.7062 | |
| 3 | skin (wet) | 47.7684 | 0.9314 | |
| 4 | fat | 4.602 | 0.0535 | |
| 5 | bone, cortical | 12.6348 | 0.1831 | |
| 6 | bone, cancellous | 18.7217 | 0.328 | |
| 7 | white matter (WM) | 37.8741 | 0.7477 | |
| 8 | grey matter (GM) | 49.7739 | 1.0916 | |
| 9 | blood | 55.5956 | 1.8885 | |
| 10 | cerebrospinal fluid (CSF) | 68.1756 | 2.4603 | |
| 11 | dura | 48.0121 | 1.0189 | |
| 12 | bone marrow | 5.1292 | 0.0584 | |
| 13 | cerebellum | 49.4544 | 1.0968 | |
| 14 | spinal cord (nerve) | 33.1778 | 0.6322 | |
| 15 | eye tissue (sclera) | 54.6089 | 1.2415 | |
| 16 | cartilage | 40.2931 | 0.8736 | |
| 17 | muscle, parallel | 60.3305 | 1.2905 | |
| 18 | stomach | 64.7973 | 1.2316 | fourth-order Cole-Cole |
| 19 | tongue | 55.017 | 0.9751 | |
| 20 | trachea | 41.7785 | 0.8023 | |
| 21 | eye lens (nucleus) | 35.6667 | 0.5118 |