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SAR / Device Absorption

Impact of head morphology on local brain specific absorption rate from exposure to mobile phone radiation.

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Adibzadeh F, Bakker JF, Paulides MM, Verhaart RF, van Rhoon GC. · 2014

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Head morphology caused up to 16.4 dB variation in averaged SAR within a 1 cm³ brain cube across 20 head models.

Plain English Summary

Summary written for general audiences

Researchers performed detailed dosimetric simulations for 20 head models to quantify how head morphology affects RF dose in different brain regions. The variation in averaged SAR among heads reached up to 16.4 dB in a 1 cm³ brain cube using the field-sensor method and up to 15.8 dB in the medulla using the Talairach method. Head models were exposed to generic mobile phone fields at 835 and 1900 MHz in tilted and cheek positions. The authors concluded that head morphology is an important uncertainty source and that dosimetric analyses for specific brain regions should use real morphology.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 1.90 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 1.90 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Specific exposure levels were not quantified in this study. The study examined exposure from: 835 and 1900 MHz

Study Details

In this study, we performed detailed dosimetric simulations for 20 head models and quantified the variation of RF dose in different brain regions as a function of head morphology

Head models were exposed to RF fields from generic mobile phones at 835 and 1900 MHz in the "tilted"...

The results show that the variation in the averaged SAR among the heads can reach up to 16.4 dB at a...

In conclusion, we show head morphology as an important uncertainty source for dosimetric studies of mobile phones. Therefore, any dosimetric analysis dealing with RF dose at a specific region in the brain (e.g., tumor risk analysis) should be based upon real morphology.

Cite This Study
Adibzadeh F, Bakker JF, Paulides MM, Verhaart RF, van Rhoon GC. (2014). Impact of head morphology on local brain specific absorption rate from exposure to mobile phone radiation. Bioelectromagnetics. 2014 Nov 15. doi: 10.1002/bem.21885.
Show BibTeX
@article{f_2014_impact_of_head_morphology_1806,
  author = {Adibzadeh F and Bakker JF and Paulides MM and Verhaart RF and van Rhoon GC.},
  title = {Impact of head morphology on local brain specific absorption rate from exposure to mobile phone radiation.},
  year = {2014},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/25399806/},
}
PubMed: 25399806

Cited By (21 papers)

Quick Questions About This Study

The study investigated how head morphology affects local brain specific absorption rate from mobile phone radiation using 20 head models.
The variation in averaged SAR among heads reached up to 16.4 dB in a 1 cm³ brain cube and up to 15.8 dB in the medulla region.
Head models were exposed to generic mobile phone fields at 835 and 1900 MHz in tilted and cheek positions.
The authors concluded that head morphology is an important uncertainty source and that dosimetric analyses for specific brain regions should be based on real morphology.
Two post-processing methods were compared: averaging SAR over Talairach regions and over sixteen predefined 1 cm³ cube-shaped field-sensors.