SAR changes in a human head model for plane wave exposure (500 - 2500 MHz) and a comparison with IEEE 2005 safety limits.

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": "plane wave",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Peak average 10 g SAR (Specific Absorption Rate) in a realistic human head model",
    "Derived external electric field values compared with IEEE and ICNIRP reference levels",
    "Effect of metallic wire spectacles on external electric field levels"
  ],
  "main_findings": "Derived external electric field values based on the largest peak average 10 g SAR in a realistic human head model were compared with IEEE and ICNIRP reference levels for plane-wave exposure at seven frequencies from 500 to 2500 MHz across multiple incident directions and polarizations. The presence of metallic wire spectacles reduced external electric field levels above 900 MHz. The comparison indicated that current IEEE and ICNIRP safety limits provide a conservative estimate.",
  "effect_direction": "unclear",
  "limitations": [
    "No human participants; results are based on a modeled realistic human head",
    "Specific numerical results for SAR and electric field levels are not provided in the abstract",
    "Exposure conditions are limited to plane-wave illumination with selected frequencies, directions, and polarizations"
  ],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "SAR",
    "specific absorption rate",
    "human head model",
    "plane wave exposure",
    "500 MHz",
    "2500 MHz",
    "IEEE safety limits",
    "ICNIRP reference levels",
    "electric field",
    "spectacles",
    "polarization",
    "incident direction"
  ],
  "suggested_hubs": [
    {
      "slug": "who-icnirp",
      "weight": 0.78,
      "reason": "Compares derived electric field values with ICNIRP reference levels and discusses conservativeness of limits."
    }
  ]
}