Effects of W-CDMA 1950 MHz EMF emitted by mobile phones on regional cerebral blood flow in humans.

Bioelectromagnetics · 2009 · No effect · Low evidence

← Research stream

No effectLow evidencePaper 4957

In PET scans obtained before, during, and after unilateral 30 min exposure, subtraction analysis found no significant rCBF changes for W-CDMA EMF exposure compared with sham.

Study snapshot

PublicationBioelectromagnetics · 2009

Study typerandomized_trial

Reported directionNo effect

Evidence ratingLow

Abstract

Use of the third generation mobile phone system is increasing worldwide. This is the first study to investigate the effects of the third generation system on regional cerebral blood flow (rCBF) in humans. We compared effects of the electromagnetic field (EMF) emitted from the Wideband Code Division Multiple Access (W-CDMA) cellular system versus sham control exposure on rCBF in humans. Nine healthy male volunteers participated in this study. Positron emission tomography (PET) scans were obtained before, during, and after unilateral 30 min EMF exposure. The subtraction analysis revealed no significant rCBF changes caused by the EMF conditions compared with the sham exposure, suggesting that EMF emitted by a third generation mobile phone does not affect rCBF in humans.

Machine Enhanced Logic

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 typerandomized_trial

Effect directionno_effect

PopulationNine healthy male volunteers

Sample size9

ExposureRF · 1950 MHz · unilateral 30 min exposure

Evidence strengthLowConfidence: 78% · Peer reviewed: yes

Main findings

In PET scans obtained before, during, and after unilateral 30 min exposure, subtraction analysis found no significant rCBF changes for W-CDMA EMF exposure compared with sham.

Outcomes measured

regional cerebral blood flow (rCBF)

Limitations

Small sample size (n=9)
Only healthy male volunteers
Short exposure duration (30 min)
Outcome limited to rCBF measured by PET

View raw extracted JSON

{
  "study_type": "randomized_trial",
  "exposure": {
    "band": "RF",
    "source": "mobile phone",
    "frequency_mhz": 1950,
    "sar_wkg": null,
    "duration": "unilateral 30 min exposure"
  },
  "population": "Nine healthy male volunteers",
  "sample_size": 9,
  "outcomes": [
    "regional cerebral blood flow (rCBF)"
  ],
  "main_findings": "In PET scans obtained before, during, and after unilateral 30 min exposure, subtraction analysis found no significant rCBF changes for W-CDMA EMF exposure compared with sham.",
  "effect_direction": "no_effect",
  "limitations": [
    "Small sample size (n=9)",
    "Only healthy male volunteers",
    "Short exposure duration (30 min)",
    "Outcome limited to rCBF measured by PET"
  ],
  "evidence_strength": "low",
  "confidence": 0.78,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "W-CDMA",
    "1950 MHz",
    "third generation (3G)",
    "mobile phone",
    "RF EMF",
    "regional cerebral blood flow",
    "rCBF",
    "PET",
    "sham exposure",
    "human volunteers"
  ],
  "suggested_hubs": []
}

AI can be wrong. Always verify against the paper.

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: 10.1002/bem.20508
PubMed: 19475648

Read the original paper →

Related papers

← Back to the Research Library