Journal of Radiation Research and Radiation Processing ›› 2019, Vol. 37 ›› Issue (1): 10701-010701.doi: 10.11889/j.1000-3436.2019.rrj.37.010701

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A three-dimensional electric field measurement system in vivo

LU Lu(),WANG Xianghui,QI Hongxin,REN Zhipeng,ZHANG Jie()   

  1. 1. Laboratory of Biophysics, Department of Physics and Materials Science, East China Normal University, Shanghai 200241, China
  • Received:2018-10-15 Revised:2018-11-27 Accepted:2018-11-27 Online:2019-02-20 Published:2019-01-30
  • Contact: Jie ZHANG E-mail:392256598@qq.com;jzhang@phy.ecnu.edu.cn
  • About author:LU Lu (female) was born in March 1994, and graduated from Jiangsu Normal University in June 2016. Now she is a master candidate in East China Normal University, majoring in biophysics, E-mail: 392256598@qq.com|Ph.D. corresponding author:ZHANG Jie, Senior engineer, E-mail:jzhang@phy.ecnu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China (31600675)

Abstract:

In order to ascertain the dosimetry of animals exposed to an electromagnetic field (EMF), a three-dimensional electric field measurement system in vivo was designed. The proposed system can be used to measure the electric fields in rats exposed to an EMF of 1 800 MHz. In addition, several parameters of the proposed system were measured, including direction and sensitivity. The isotropy of the proposed system was found to be less than ?3 dB. The measurement range and system sensitivity were 0~605.95 V/m and 0.96 mV/m, respectively. Further, the magnitude, direction, and three-dimensional components of the electric field were determined by several tests using different solutions. The results indicated that the response coefficient of the measurement system in different media decreased as the relative permittivity increased. When the relative permittivity was higher than 20, no significant change in the response coefficient was observed. The difference in maximum relative errors of the electric field between the measured values in the brain and liver of rats exposed to EMF of 1 800 MHz and the calculated values was small, 5.1% for brain and 13.1% for liver. The results indicated that the measured electric field values were in good agreement with the calculated values. Therefore, it is demonstrated the proposed three-dimensional electric field measurement system can accurately measure the electric field in animals irradiated by microwaves.

Key words: Three-dimensional electric field measurement system, Direction of electric field, In vivo, Microwave irradiation

CLC Number: 

  • TL72