Toivonen Tommi, Toivo Tim, Pitkäaho Risto, Puranen Lauri, Silfverhuth Minna, Mennander Ari, Hannula Markus, Hyttinen Jari, Jokela Kari
STUK-Radiation and Nuclear Safety Authority, Helsinki, Finland.
Bioelectromagnetics. 2008 Jul;29(5):363-70. doi: 10.1002/bem.20404.
The aim of this study was a dosimetrical analysis of the setup used in the exposure of the heads of domestic pigs to GSM-modulated radio frequency electromagnetic fields (RF-EMF) at 900 MHz. The heads of pigs were irradiated with a half wave dipole using three different exposure routines; short bursts of 1-3 s at two different exposure levels and a continuous 10-min exposure. The electroencephalogram (EEG) was registered continuously during the exposures to search for RF-EMF originated changes. The dosimetry was based on simulations with the anatomical heterogeneous numerical model of the pig head. The simulation results were validated by experimental measurements with the exposure dipole and a homogeneous liquid phantom resembling the pig head. The specific absorption rate (SAR), defined as a maximum average over 10 g tissue mass (SAR(10g)), was 7.3 W/kg for the first set of short bursts and 31 W/kg for the second set of short bursts. The SAR(10g) in the continuous 10-min exposure was 31 W/kg. The estimated uncertainty for the dosimetry was +/-25% (K = 2).
本研究的目的是对家猪头在900MHz GSM调制射频电磁场（RF-EMF）照射中所使用的设置进行剂量学分析。使用半波偶极子对猪的头部进行照射，采用三种不同的照射程序：在两种不同照射水平下进行1 - 3秒的短脉冲照射，以及持续10分钟的照射。在照射过程中持续记录脑电图（EEG），以寻找由RF-EMF引起的变化。剂量学基于猪头部解剖学非均匀数值模型的模拟。通过使用照射偶极子和类似猪头部的均匀液体模型进行实验测量，对模拟结果进行了验证。第一组短脉冲照射的比吸收率（SAR），定义为10g组织质量上的最大平均值（SAR(10g)），为7.3W/kg，第二组短脉冲照射的SAR(10g)为31W/kg。持续10分钟照射的SAR(10g)为31W/kg。剂量学的估计不确定度为±25%（包含因子K = 2）。
