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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

From: 3-T MRI implant safety: heat induction with new dual-channel radiofrequency transmission technology

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
  1. RF radiofrequency; B 1 + 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