Table 1

Calculated and measured brain and whole-body SAR for rat NF FM exposures

Rat size class (g)Calculateda SAR (W/kg) +25% nose to antenna spacingMeasured SAR (W/kg) rat cadaverc
30 mm45 mm45 mm
WBbBrainWBBrainBrain
1500.721.10.570.74
2500.511.40.421.01.8d
3000.441.50.371.1
4500.311.60.271.22.3e
  • a Calculated and measured brain and whole-body SAR for rat NF FM exposures. Values are scaled for power input used in this study, i.e., 2.5 ± 0.1 W. The uncertainty of the numerical dosimetry was estimated to be less than ±1.5 dB for the brain average and less than ±1 dB for the whole-body average SAR. Uncertainty in thermography is less than ±3 dB. Brain spatial resolution of magnetic resonance imaging-based model, 0.125 mm3; remainder of body, 1.5 mm3. The 30-mm nose-to-antenna distance was used from weaning to 120 days, thereafter increased to 45 mm.

  • b WB, whole body.

  • c Comparison of SARs (W/kg) of thermographic imaging of a rat cadaver with a modeled rat-shaped mass of simulated muscle tissue.

  • d Female, 236 g.

  • e Male, 462 g.