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SAR / Device Absorption

Volume-averaged SAR in adult and child head models when using mobile phones: a computational study with detailed CAD-based models of commercial mobile phones.

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Keshvari J, Heikkilä T. · 2011

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The study found no systematic differences in volume-averaged SAR between child and adult head models when using realistic mobile phone models.

Plain English Summary

Summary written for general audiences

Researchers investigated SAR differences in child and adult head models using CAD models of commercial mobile phones as exposure sources. The main finding was that SAR distribution depends highly on antenna structure and phone model, making the exposure source type the key parameter. No systematic differences between child and adult heads were found from a volume-averaged SAR perspective. SAR values from generic source models could not be extrapolated to real device exposures.

Why This Matters

Four MRI-based head phantoms were used in the computational study. CAD models of Nokia 8310 and 6630 phones served as the exposure sources. Commercially available FDTD software performed the SAR calculations. Simulations ran at 900 MHz and 1747 MHz for the Nokia 8310 and at 900 MHz, 1747 MHz, and 1950 MHz for the Nokia 6630.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 900 MHz - 1.95 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 900 MHz - 1.95 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 900 MHz, 1747 MHz and 1950 MHz

Study Details

The objective of this study was to investigate the SAR difference in the head of children and adults using realistic EMF sources based on CAD models of commercial mobile phones.

Four MRI-based head phantoms were used in the study. CAD models of Nokia 8310 and 6630 mobile phones...

The main finding of this study was that the SAR distribution/variation in the head models highly dep...

The general conclusion is that from a volume averaged SAR point of view, no systematic differences between child and adult heads were found.

Cite This Study
Keshvari J, Heikkilä T. (2011). Volume-averaged SAR in adult and child head models when using mobile phones: a computational study with detailed CAD-based models of commercial mobile phones. Prog Biophys Mol Biol. 107(3):439-442, 2011.
Show BibTeX
@article{j_2011_volumeaveraged_sar_in_adult_2275,
  author = {Keshvari J and Heikkilä T.},
  title = {Volume-averaged SAR in adult and child head models when using mobile phones: a computational study with detailed CAD-based models of commercial mobile phones.},
  year = {2011},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/22005524/},
}
PubMed: 22005524

Cited By (8 papers)

Quick Questions About This Study

The objective was to investigate SAR differences in child and adult heads using realistic EMF sources based on CAD models of commercial mobile phones.
From a volume-averaged SAR perspective, no systematic differences between child and adult heads were found.
SAR distribution and variation depended highly on the structure of the antenna and phone model, indicating the exposure source type is the main parameter.
CAD models of Nokia 8310 and 6630 were used, with simulations at 900 MHz and 1747 MHz for the 8310 and at 900 MHz, 1747 MHz, and 1950 MHz for the 6630.