Yang Lei, Hao Dongmei, Wu Shuicai, Zhong Rugang, Zeng Yanjun
College of Life Science and Bioengineering, Beijing University of Technology, China.
Australas Phys Eng Sci Med. 2013 Jun;36(2):251-7. doi: 10.1007/s13246-013-0202-4. Epub 2013 Jun 6.
Rats are often used in the electromagnetic field (EMF) exposure experiments. In the study for the effect of 900 MHz EMF exposure on learning and memory in SD rats, the specific absorption rate (SAR) and the temperature rise in the rat head are numerically evaluated. The digital anatomical model of a SD rat is reconstructed with the MRI images. Numerical method as finite difference time domain has been applied to assess the SAR and the temperature rise during the exposure. Measurements and simulations are conducted to characterize the net radiated power of the dipole to provide a precise dosimetric result. The whole-body average SAR and the localized SAR averaging over 1, 0.5 and 0.05 g mass for different organs/tissues are given. It reveals that during the given exposure experiment setup, no significant temperature rise occurs. The reconstructed anatomical rat model could be used in the EMF simulation and the dosimetric result provides useful information for the biological effect studies.
大鼠常用于电磁场（EMF）暴露实验。在关于900MHz电磁场暴露对SD大鼠学习和记忆影响的研究中，对大鼠头部的比吸收率（SAR）和温度升高进行了数值评估。利用MRI图像重建了SD大鼠的数字解剖模型。采用时域有限差分等数值方法来评估暴露期间的SAR和温度升高。进行测量和模拟以表征偶极子的净辐射功率，从而提供精确的剂量学结果。给出了不同器官/组织在1g、0.5g和0.05g质量上的全身平均SAR和局部SAR。结果表明，在给定的暴露实验设置下，未出现明显的温度升高。重建的大鼠解剖模型可用于电磁场模拟，剂量学结果为生物效应研究提供了有用信息。
