SAR and thermal distribution of pregnant woman and child inside elevator cabin

Abstract

SAR and thermal distribution of pregnant woman and child inside elevator cabin Ioanna Karatsi, Sofia Bakogianni, Stavros Koulouridis. (2022). SAR and thermal distribution of pregnant woman and child inside elevator cabin. International Journal of Microwave and Wireless Technologies, 1-14. doi:10.1017/S1759078722000253. Abstract A detailed dosimetry study of electromagnetic absorption and temperature rise under real scenarios is delivered when a mobile phone is used inside an elevator cabin. Numerically accurate human models of a 7th month pregnant woman and a 5-year-old female child are utilized as the exposed subjects. The female child acts as the phone user. The mobile phone is modeled in three talk positions (parallel, tilt, and cheek) operating at 1000 MHz and 1800 MHz. From the obtained numerical results for the specific absorption rate (SAR) and temperature rise induced by the mobile radiofrequency (RF) radiation, it is found that the child's RF exposure is significantly affected by the phone position and less affected by the relevant position of the human models. The exact opposite case applies for the pregnant woman model and its fetus. Almost all numerical investigations are carried out inside a metallic elevator cabin. Open access paper: bit.ly

AI evidence extraction

Main findings

Numerical dosimetry in a metallic elevator cabin modeled a mobile phone at 1000 MHz and 1800 MHz in three talk positions (parallel, tilt, cheek). The child’s RF exposure (SAR/temperature rise) was reported to be significantly affected by phone position and less affected by the relative position of the human models, while the opposite pattern was reported for the pregnant woman model and fetus.

Outcomes measured

• specific absorption rate (SAR)
• temperature rise / thermal distribution

Limitations

• Numerical modeling study (dosimetry) rather than measurements in humans
• Exposure duration not stated in abstract
• SAR values and temperature-rise magnitudes not provided in abstract
• Most investigations conducted inside a metallic elevator cabin (scenario-specific)

{
    "study_type": "other",
    "exposure": {
        "band": "RF",
        "source": "mobile phone",
        "frequency_mhz": null,
        "sar_wkg": null,
        "duration": null
    },
    "population": "7th month pregnant woman model (including fetus) and a 5-year-old female child model; child acts as phone user",
    "sample_size": null,
    "outcomes": [
        "specific absorption rate (SAR)",
        "temperature rise / thermal distribution"
    ],
    "main_findings": "Numerical dosimetry in a metallic elevator cabin modeled a mobile phone at 1000 MHz and 1800 MHz in three talk positions (parallel, tilt, cheek). The child’s RF exposure (SAR/temperature rise) was reported to be significantly affected by phone position and less affected by the relative position of the human models, while the opposite pattern was reported for the pregnant woman model and fetus.",
    "effect_direction": "unclear",
    "limitations": [
        "Numerical modeling study (dosimetry) rather than measurements in humans",
        "Exposure duration not stated in abstract",
        "SAR values and temperature-rise magnitudes not provided in abstract",
        "Most investigations conducted inside a metallic elevator cabin (scenario-specific)"
    ],
    "evidence_strength": "low",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "dosimetry",
        "SAR",
        "temperature rise",
        "thermal distribution",
        "pregnant woman",
        "fetus",
        "child",
        "mobile phone",
        "elevator cabin",
        "metallic cabin",
        "RF radiation",
        "1000 MHz",
        "1800 MHz",
        "talk position"
    ],
    "suggested_hubs": []
}

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