Table 2.
Induced temperature increase, ΔT, of the cobalt-chrome (CoCr stem with the ceramic head at different lateral offsets and under circular versus the elliptic transmission
| Lateral offset from magnetic axis (cm) | RF transmission polarization mode | B1 + rms (μT) | ΔT (°C) | wbSAR (W/kg) |
|---|---|---|---|---|
| 20 | Circular | 3.248 | 6.2 | 1.042 |
| Elliptic | 3.335 | 1.5 | 0.75 | |
| 16 | Circular | 3.248 | 4.2 | 1.042 |
| Elliptic | 3.335 | 1.2 | 0.75 | |
| 12 | Circular | 3.248 | 2 | 1.042 |
| Elliptic | 3.335 | 0.5 | 0.75 | |
| 8 | Circular | 3.248 | 0.9 | 1.042 |
| Elliptic | 3.335 | 0.4 | 0.75 | |
| 4 | Circular | 3.248 | 0.4 | 1.042 |
| Elliptic | 3.335 | 0.3 | 0.75 |
RF radiofrequency; B1 + rms root-mean-square value of the magnetic resonance imaging (MRI) effective component of the RF magnetic (B1) field, μT microtesla, ΔT induced temperature increase; °C degree Celsius; wbSAR whole-body averaged specific absorption rate, W/kg Watts per kilogram