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SAR / Device Absorption

Assessment of guidelines for limiting exposures to emf using methods of probabilistic risk analysis.

Not an original health-effects study

Thompson CJ, Anderson V, Rowley JT. · 2002

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The study used probabilistic risk analysis to assess radiofrequency exposure limits and found that SAR values are lognormally distributed with a very low probability of exceeding standard limits.

Plain English Summary

Summary written for general audiences

The broad objective was to assess radiofrequency exposure limits, hazard thresholds, and safety factors using probabilistic risk analysis. Analysis of SAR variables including conductivity and permittivity of grey brain matter and radiated field strengths supported the hypothesis that SAR values are lognormally distributed. The probability that SAR exceeds a threshold was derived and shown to be very low for handset SARs relative to allowable standard limits. The analysis focused on peak radiofrequency SAR values in the brain from digital mobile telephones operating at approximately 900 MHz.

Exposure Information

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

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

Study Details

The broad objective in our work is to assess radiofrequency exposure limits, hazard thresholds, and safety factors using methods of probabilistic risk analysis.

We focus our analysis on the variables affecting peak radiofrequency specific energy absorption rate...

Our analysis of component SAR variables such as conductivity and permittivity of grey brain matter a...

Cite This Study
Thompson CJ, Anderson V, Rowley JT. (2002). Assessment of guidelines for limiting exposures to emf using methods of probabilistic risk analysis. Health Phys 82(4):484-490, 2002.
Show BibTeX
@article{cj_2002_assessment_of_guidelines_for_2624,
  author = {Thompson CJ and Anderson V and Rowley JT.},
  title = {Assessment of guidelines for limiting exposures to emf using methods of probabilistic risk analysis.},
  year = {2002},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/11906137/},
}
PubMed: 11906137

Cited By (3 papers)

Quick Questions About This Study

The broad objective was to assess radiofrequency exposure limits, hazard thresholds, and safety factors using probabilistic risk analysis.
The analysis supported the hypothesis that SAR values are distributed lognormally.
The probability that SAR exceeds a certain threshold is very low for handset SARs relative to presently allowable standard limits.
The analysis focused on peak radiofrequency SAR values in the brain from digital mobile telephones operating at approximately 900 MHz.
Because SAR is defined as a product of positive random variables, it is not unreasonable to assume a lognormal distribution.