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Brain & Nervous System

No effects of short-term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography.

No Effects Found

Kwon MS, Vorobyev V, Kännälä S, Laine M, Rinne JO, Toivonen T, Johansson J, Teräs M, Joutsa J, Tuominen L, Lindholm H, Alanko T, Hämäläinen H. · 2012

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Five-minute cell phone exposures showed no immediate changes in brain blood flow, but longer-term effects remain unstudied.

Plain English Summary

Summary written for general audiences

Finnish researchers used advanced brain imaging (PET scans) to measure blood flow in the brains of 15 men while they were exposed to cell phone radiation for 5 minutes from different positions around their heads. The study found no changes in brain blood flow despite the radiation causing a slight temperature increase in the ear canals, suggesting that short-term cell phone exposure doesn't immediately affect how blood circulates in the brain.

Exposure Information

A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 902.4 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 902.4 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

The study examined exposure from: 902.4 MHz Duration: 5 minutes

Study Details

The present study investigated the effects of 902.4 MHz global system for mobile communications (GSM) mobile phone radiation on cerebral blood flow using positron emission tomography (PET) with the (15) O-water tracer.

Fifteen young, healthy, right-handed male subjects were exposed to phone radiation from three differ...

The exposure induced a slight temperature rise in the ear canals but did not affect brain hemodynami...

The results provided no evidence for acute effects of short-term mobile phone radiation on cerebral blood flow.

Cite This Study
Kwon MS, Vorobyev V, Kännälä S, Laine M, Rinne JO, Toivonen T, Johansson J, Teräs M, Joutsa J, Tuominen L, Lindholm H, Alanko T, Hämäläinen H. (2012). No effects of short-term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography. Bioelectromagnetics. 33(3):247-256, 2012.
Show BibTeX
@article{ms_2012_no_effects_of_shortterm_3169,
  author = {Kwon MS and Vorobyev V and Kännälä S and Laine M and Rinne JO and Toivonen T and Johansson J and Teräs M and Joutsa J and Tuominen L and Lindholm H and Alanko T and Hämäläinen H.},
  title = {No effects of short-term GSM mobile phone radiation on cerebral blood flow measured using positron emission tomography.},
  year = {2012},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/21932437/},
}
PubMed: 21932437

Cited By (14 papers)

Quick Questions About This Study

A 2012 Finnish study using PET brain scans found that 902.4 MHz cell phone radiation did not affect brain blood flow in 15 men exposed for 5 minutes. Despite causing slight ear canal temperature increases, the radiation showed no impact on how blood circulates through the brain.
Research using advanced PET imaging shows that 5 minutes of cell phone radiation exposure does not change brain circulation patterns. The study measured blood flow in different brain regions during exposure and found no significant hemodynamic changes despite detectable temperature increases.
PET scan studies reveal no brain blood flow changes from short-term cell phone radiation exposure. Finnish researchers found that despite radiation causing measurable temperature rises in ear canals, brain hemodynamics and task performance remained unaffected during 5-minute exposures.
Studies show no immediate brain blood flow effects from 902.4 MHz cell phone radiation. Research using positron emission tomography found that short-term exposure produces no acute changes in cerebral circulation, even when radiation causes detectable temperature increases.
Research testing different cell phone positions around the head found no effects on brain blood flow. A 2012 study using PET scans showed that regardless of phone placement, 5-minute exposures to 902.4 MHz radiation did not alter cerebral hemodynamics or cognitive performance.