Effect of radiofrequency exposure on body temperature: Real-time monitoring in normal rats

Authors: Kim HS, Kim Y, Jeon SB, Choi HD, Lee AK, Lee HJ, Pack JK, Kim N, Ahn YH

Year: 2022 Dec

Category: Radiobiology

Journal: J Therm Biol

Institution: Korea Institute of Radiological & Medical Sciences, Seoul, Korea

DOI: 10.1016/j.jtherbio.2022.103350

URL: https://pubmed.ncbi.nlm.nih.gov/36462859/

Abstract

Overview

This study investigated the effects of radiofrequency radiation (RFR) on the body temperature of healthy rats using a controlled experimental setup. A highlight of the methodology included real-time monitoring with an innovative implantable thermometer.

Methodology

Participants: 40 healthy male Sprague-Dawley rats, divided into groups with and without thermometers implanted.
Exposure: Exposure to 1,760-MHz LTE signals at intensities of 0 W/kg and 4 W/kg in a specialized reverberation chamber.
Monitoring: Body temperature was monitored in real-time using an iButton data logger implanted intraperitoneally, complemented by direct measurements with a rectal thermometer.

Findings

The data recorded showed no significant changes in body temperature after 6 hours of RF exposure at 4 W/kg, suggesting a minimal thermal effect within this exposure and time frame. Temperature readings from the iButton and rectal thermometers were highly correlated, reinforcing the reliability of the data collected.

Conclusion

Despite concerns regarding the impact of RF radiation, in this controlled study, there was no significant increase in body temperature in rats exposed to an RF of 4 W/kg over 6 hours. These findings suggest that at this level and duration, RF exposures are unlikely to affect body temperature significantly, highlighting potential safety of RF levels in these conditions. However, ongoing research is necessary to fully understand the broader implications of long-term RF exposure.

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