Abstract

Info

Title:: Thermal dose of experimental animals exposed in electromagnetic field

Author(s):: LIN Jiajin; LI Jing; DING Guirong; Department of Radiation Biology, Faculty of Preventive Medicine, Air Force Medical University/Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, Xian 710032, China

Keywords:: Keywords: electromagnetic field heat transfer dose temperature boundary condition

Abstract:: Abstract: The study explores the thermal dose of experimental animals exposed in electromagnetic field. The simulation environment containing electromagnetic and thermal doses is established based on the bioheat equation and the three-dimensional rat model, and the effects of specific absorption rate, metabolic rate and boundary condition on temperature distribution and variation are assessed. The result shows that the core temperature rises with increasing whole body average specific absorption rate (WBASAR). At WBASAR of 4 W/kg, the midbrain and testes have higher specific absorption rates due to the skin effect, resulting in a more significant temperature rise in organ tissues than in the core and at WBASAR of 0.4 W/kg, the temperature variation of the shallow organs caused by the sudden changes of metabolic and external environment reaches 1 ℃, which is much larger than that of the core. The experiment demonstrates target organs such as the head and testicles as critical subjects in thermal dose assessment. The experimental conditions should be regulated to reduce the effects of metabolic rate and boundary condition on thermal dose. The study has guiding significance for bioelectromagnetic experimental design and effect evaluation on thermal dose.