研究のタイプ: 医学/生物学の研究 (experimental study)

[携帯電話から放射されるW-CDMA1950 MHz電磁界がヒトの局所脳血流に及ぼす影響] med./bio.

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

掲載誌: Bioelectromagnetics 2009; 30 (7): 536-544

この論文は、健康な男性被験者9人について、局所脳血流(rCBF)に対するW-CDMA携帯電話信号ばく露の影響を擬似ばく露の場合と比較して調べた。rCBFはポジトロンエミッショントモグラフィを用いて、ばく露前、ばく露中(脳の片側へ30分間のばく露)、ばく露後に計測した。それぞれの画像の差分解析の結果、電磁界ばく露擬似ばく露でrCBFに有意な変化は見られなかったと結論している。

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研究目的(著者による)

To investigate the effects of exposure to W-CDMA cellular phone on regional cerebral blood flow in humans.

詳細情報

Nine healthy volunteers underwent 12 scans (ten minutes break in between each scan). Additionally, before the experiment two scans were assessed as baseline. Half of the 12 scans were performed under exposure conditions and the other half under sham exposure conditions. The interval between the real exposure and sham exposure was at least one week in order to avoid any lasting effects. The fifth scan was assessed immediatly after the exposure/sham exposure and the sixth scan followed ten minutes after.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 1.95 GHz
ばく露時間: continuous for 30 min
  • 電力: 430 mW
  • SAR: 2.02 W/kg average over mass (10 g)
  • SAR: 4.4 W/kg peak (brain)

ばく露1

主たる特性
周波数 1.95 GHz
タイプ
  • electromagnetic field
ばく露時間 continuous for 30 min
ばく露装置
ばく露の発生源/構造
  • patch antenna
Distance between exposed object and exposure source 40 mm
ばく露装置の詳細 antenna covered by a 54 mm x 64 mm plastic box mounted to the right side of the subject's head
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力 430 mW - - - -
SAR 2.02 W/kg average over mass 計算値 10 g -
SAR 4.4 W/kg peak 計算値 brain -

Reference articles

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
研究対象とした臓器系:
調査の時期:
  • ばく露前
  • ばく露中
  • ばく露後

研究の主なアウトカム(著者による)

No significant changes in regional cerebral blood flow were found under exposure compared to sham exposure.
In this study, electromagnetic fields emitted by W-CDMA mobile phones did not affect the regional cerebral blood flow in humans during or after exposure.

研究の種別:

研究助成

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