Published: March 17, 2017
Perry F. Wilson, John M. Ladbury, Galen H. Koepke, Yijian Gong, Myles Capstick, Keven Kuhn, David L. McCormick, Ronald L. Melnick, Niels Kuster
In this paper, we present a detailed life time dosimetry analysis for individually housed rodents exposed to radio frequency (RF) signals. The unrestrained rodents were exposed in reverberation chambers for 2 years at three whole-body averaged specific absorption rate (SAR) levels of 6 W/kg, 3 W/kg and 1.5 W/kg for the rats, 10 W/kg, 5.0 W/kg, and 2.5 W/kg for the mice. This requires an accurate analysis of the dose as well as the uncertainty and variation due to the exposure environment, animal posture and differences in the growth rates of individual rodents over a 2-year exposure period, which had not been comprehensively analyzed in any previous research. For this purpose, six high-resolution anatomical models of rats and mice plus five postured models of a male rat and male mice were analyzed, and accurate whole-body SAR (wbSAR) and organ SAR (oSAR) are reported. The average exposure of the high-water-content tissues blood, heart, lung were more highly exposed by _4 dB compared to the wbSAR. The lowloss tissues such as bone and fat were less exposed by a factor of _9 dB compared to the wbSAR. The uncertainty over the exposure period for the SAR was estimated to be <49% (k=2) for the rodents whereas the relative uncertainty between the group was <14% (k=1). The instantaneous variation (averaged over 1 min) was <13% (k=1), which is small compared to other long term exposure research projects. These detailed dosimetric results provide a comprehensive reference for studies of longterm biological effects of the exposure of rodents to RF energy.
Citation: IEEE Transactions on Electromagnetic Compatibility
Pub Type: Journals
dosimetry, RF exposure, reverberation chamber, Specific Absorption Rate (SAR)
Created March 17, 2017, Updated March 19, 2019