Table 1.
Parallel excitation RF pulse power comparison with different constraints. For conciseness, values are listed for the channel with the highest power level for the given measurement (indicated in italics). Good agreement between the fully constrained power predictions and measurements can be seen in columns three and four.
| Measured | Predicted | |||
|---|---|---|---|---|
| Unconstrained | Global SAR Constrained* |
Fully Constrained** |
Fully Constrained |
|
| Global SAR (W/kg) | 5.1 | 2.9 | 2.3 | 2.4 |
| FWD Peak (W) | 1103.2 (ch3) | 916.2 (ch1) | 683.9 (ch4) | 700.0 |
| RFL Peak (W) | 86.5 (ch3) | 67.5 (ch3) | 46.4 (ch3) | 50.0 |
| FWD Average (W) | 65.3 (ch1) | 40.3 (ch1) | 30.7 (ch1) | 33.5 |
| RFL Average (W) | 3.7 (ch2) | 2.2 (ch3) | 1.6 (ch3) | 2.0 |
The following constraints were implemented:
*
global SAR ≤ 3.2 W / kg
**
global SAR ≤ 3.2 W / kg,