Assessment of spatial-average absorbed power density and peak temperature rise in skin model under localized electromagnetic exposure

PAPER manual Radiation Protection Dosimetry 2025 Engineering / measurement Effect: mixed Evidence: Low

Read original paper → DOI: 10.1093/rpd/ncaf096 PMID: 40817877 Evidence Lab

Abstract

Category: Biophysics, Dosimetry Tags: EMF exposure, skin dosimetry, spatial-average absorbed power density, temperature rise, vasculature modeling, body tissues, 3-30 GHz DOI: 10.1093/rpd/ncaf096 URL: pubmed.ncbi.nlm.nih.gov Overview This study investigates the spatial-average absorbed power density (APD) and temperature rise in human skin models subjected to localized electromagnetic field (EMF) exposure. The research employs advanced numerical dosimetry using multi-layer models that include critical tissue components such as skin, fat, and muscle. Methods - Developed a synthetic blood vessel model and integrated it within multi-layer skin constructs. - Performed electromagnetic computations over a frequency range of 3 to 30 GHz. - Evaluated steady-state temperature increase using the Pennes bioheat transfer equation. - Compared simulations both with and without vasculature variations and assessed different endpoint diameters. Findings - Effect of vascular modeling on peak spatial-averaged APD was found to be negligible. - Influence on peak temperature rise due to vasculature was ~8% at 3 GHz, dropping below 3% above 6 GHz. - Endpoint diameter effect was marginal on both APD and peak temperature rise. - Observed variations were smaller than those caused by changes in tissue thickness, dielectric, or thermal properties. Conclusion Although the impact of vasculature on EMF-induced temperature increase is modest, its inclusion refines the accuracy of localized thermal distribution predictions. This suggests that future anatomical modeling for EMF safety should consider detailed vascular representation for enhanced dosimetry precision.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

mixed

Population

—

Sample size

—

Exposure

RF localized electromagnetic exposure

Evidence strength

Low

Confidence: 74% · Peer-reviewed: yes

Main findings

Numerical dosimetry simulations in multi-layer skin models (skin/fat/muscle) over 3–30 GHz found negligible effects of vascular modeling on peak spatial-averaged absorbed power density. Vasculature influenced peak temperature rise by ~8% at 3 GHz and by <3% above 6 GHz; endpoint diameter effects were marginal, and these variations were smaller than those from tissue thickness or dielectric/thermal property changes.

Outcomes measured

spatial-average absorbed power density (APD)
peak temperature rise in skin model
effect of vasculature modeling on APD and temperature rise
effect of endpoint diameter on APD and temperature rise

Suggested hubs

who-icnirp (0.42)
Study focuses on RF dosimetry metrics (absorbed power density) and temperature rise relevant to exposure guideline assessment.

View raw extracted JSON

{
    "study_type": "engineering",
    "exposure": {
        "band": "RF",
        "source": "localized electromagnetic exposure",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "spatial-average absorbed power density (APD)",
        "peak temperature rise in skin model",
        "effect of vasculature modeling on APD and temperature rise",
        "effect of endpoint diameter on APD and temperature rise"
    ],
    "main_findings": "Numerical dosimetry simulations in multi-layer skin models (skin/fat/muscle) over 3–30 GHz found negligible effects of vascular modeling on peak spatial-averaged absorbed power density. Vasculature influenced peak temperature rise by ~8% at 3 GHz and by <3% above 6 GHz; endpoint diameter effects were marginal, and these variations were smaller than those from tissue thickness or dielectric/thermal property changes.",
    "effect_direction": "mixed",
    "limitations": [],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "dosimetry",
        "skin model",
        "absorbed power density",
        "temperature rise",
        "Pennes bioheat equation",
        "vasculature modeling",
        "3-30 GHz",
        "localized exposure"
    ],
    "suggested_hubs": [
        {
            "slug": "who-icnirp",
            "weight": 0.419999999999999984456877655247808434069156646728515625,
            "reason": "Study focuses on RF dosimetry metrics (absorbed power density) and temperature rise relevant to exposure guideline assessment."
        }
    ]
}

AI can be wrong. Always verify against the paper.

AI-extracted fields are generated from the abstract/metadata and may be incomplete or incorrect. This content is for informational purposes only and is not medical advice.

Comments

No comments yet.