TABLE 2.
Peak and Mean Changes in RF-Field Power with and without Leads
| Dipole 915 MHz | Pi |
|||||
|---|---|---|---|---|---|---|
| Epidermis, dermis | Subcutaneous fat | Skull | Bone marrow | Brain | ||
| Set 1 | max (Pi) | 1279.0 | 80.8 | 66.2 | 18.8 | 45.9 |
| mean (Pi) | 0.78 | 1.05 | 1.04 | 0.89 | 1.16 | |
| Volume (1 mm3) | 16990 | 25348 | 23546 | 6988 | 70193 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 4.4% | 6.6% | 7.3% | 5.1% | 5.1% | |
| Set 2 | max (Pi) | 366.0 | 75.0 | 54.9 | 14.8 | 9.1 |
| mean (Pi) | 0.81 | 1.05 | 1.07 | 1.01 | 1.03 | |
| Volume (1 mm3) | 7163 | 8764 | 12718 | 3960 | 18485 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 1.9% | 2.3% | 3.9% | 2.9% | 1.3% | |
| Patch 915 MHz | Pi |
|||||
| Epidermis, dermis | Subcutaneous fat | Skull | Bone marrow | Brain | ||
| Set 1 | max (Pi) | 270.0 | 163.2 | 8.5 | 10.0 | 21.1 |
| mean (Pi) | 0.69 | 0.99 | 0.92 | 0.86 | 1.00 | |
| Volume (1 mm3) | 9276 | 17612 | 13472 | 3744 | 56905 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 2.4% | 4.6% | 4.2% | 2.7% | 4.1% | |
| Set 2 | max (Pi) | 430.7 | 83.6 | 58.0 | 16.6 | 23.5 |
| mean (Pi) | 0.77 | 1.03 | 1.05 | 1.02 | 0.98 | |
| Volume (1 mm3) | 5650 | 9799 | 11075 | 3849 | 10061 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 1.5% | 2.6% | 3.4% | 2.8% | 0.7% | |
| Mobile phone 915 MHz | Pi |
|||||
| Epidermis, dermis | Subcutaneous fat | Skull | Bone marrow | Brain | ||
| Set 1 | max (Pi) | 859.1 | 454.0 | 31.0 | 21.9 | 47.8 |
| mean (Pi) | 1.04 | 1.34 | 1.33 | 1.27 | 1.36 | |
| Volume (1mm3) | 25922 | 41755 | 43417 | 19549 | 195016 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 6.7% | 10.9% | 13.4% | 14.3% | 14.2% | |
| Set 2 | max (Pi) | 459.5 | 83.9 | 34.5 | 8.2 | 6.6 |
| mean (Pi) | 0.87 | 1.07 | 1.04 | 1.03 | 1.01 | |
| Volume (1 mm3) | 7983 | 8698 | 8691 | 3675 | 11603 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 2.1% | 2.3% | 2.7% | 2.7% | 0.8% | |
| Mobile Phone 1748 MHz | Pi |
|||||
| Epidermis, dermis | Subcutaneous fat | Skull | Bone marrow | Brain | ||
| Set 1 | max (Pi) | 52.2 | 15.9 | 10.2 | 5.3 | 14.1 |
| mean (Pi) | 0.89 | 1.3 | 1.10 | 1.13 | 1.08 | |
| Volume (1 mm3) | 26826 | 40065 | 17791 | 8315 | 56447 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 7.0% | 10.5% | 5.5% | 6.1% | 4.1% | |
| Set 2 | max (Pi) | 31.0 | 8.9 | 9.0 | 2.2 | 7.2 |
| mean (Pi) | 0.74 | 1.0 | 1.00 | 0.97 | 0.98 | |
| Volume (1mm3) | 2276 | 2614 | 3331 | 91 | 5505 | |
| Pi > 2 | ||||||
| Volume with Pi > 2 percentage of total volume | 0.6% | 0.7% | 1.0% | 0.1% | 0.4% | |
Notes. Values for Set 1 and Set 2 for anatomical structures underneath EEG electrodes are shown. The volume with Pi higher than 2 (i.e. over 100% increase in RF power compared to no leads) is provided as the absolute value as well as a percentage of the overall volume of the anatomical structure.