Simplified segmented human models for whole body and localised SAR evaluation of 20 MHz to 6 GHz electromagnetic field exposures.

Radiation protection dosimetry · 2013 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 4514

Simplified segmented human models derived from whole-body MRI scans were used to calculate WBA-SAR and peak localised SAR (10 g) across various exposure configurations. Results were reported to confirm the efficiency and validity of the proposed simplified se…

Study snapshot

PublicationRadiation protection dosimetry · 2013

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

The digital human model is a key element in evaluating the electromagnetic field (EMF) exposure. This paper proposes the application of simplified segmented human models for EMF exposure compliance evaluation with the whole body and the localised limits. The method is based on the fact that most of the EMF power absorption is concentrated in several major tissues. Two kinds of human models were simply (the proposed method) and precisely segmented from two sets of whole body magnetic resonance imaging (MRI) scanned images. The whole body average-specific absorption rate (WBA-SAR) and the peak localised SAR averaging over 10 g tissues for the two kinds of models are calculated for various exposure configurations. The results confirmed the efficiency and the validity of the proposed method. The application as evaluating the MRI radiofrequency EMF exposure is also discussed in the paper.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureRF

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Whole-body average specific absorption rate (WBA-SAR)
Peak localised SAR averaged over 10 g tissue

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "RF",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Whole-body average specific absorption rate (WBA-SAR)",
    "Peak localised SAR averaged over 10 g tissue"
  ],
  "main_findings": "Simplified segmented human models derived from whole-body MRI scans were used to calculate WBA-SAR and peak localised SAR (10 g) across various exposure configurations. Results were reported to confirm the efficiency and validity of the proposed simplified segmentation method; application to evaluating MRI radiofrequency EMF exposure was discussed.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "digital human model",
    "simplified segmentation",
    "segmented human models",
    "MRI scans",
    "compliance evaluation",
    "whole-body SAR",
    "localised SAR",
    "10 g averaging",
    "RF exposure",
    "20 MHz to 6 GHz"
  ],
  "suggested_hubs": []
}

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

Identifiers and source

DOI: 10.1093/rpd/ncs105
PubMed: 22719042

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