휴대전화 사용 후 뇌 온도의 변화

Abstract

Background: Mobile phone has become a very popular device used in everyday our lives. However, the possible hazard to human body such as brain tumor has been proposed intermittently. This unwanted possibility was calmed down due to the absence of definite evidence of hazard. This study was performed to see the effect of mobile phone use on the brain temperature. Methods: In 20 volunteers, We performed 4 steps of temperature measuring procedure. Four steps are pre-use (SI, basal state), wire-phone (S2, conventional telephone), PCS phone (S3, using 1,750~1,900MHz), cellular phone (S4, using 820 MHz) states. Brain temperatures were measured by radiothermometer at 10 sites (5 sites in each hemisphere) of the brain after 5 minutes of telecommunication through the phones. The final data were compared using paired t-test. Results: In PCS user group (Average; 35.73708℃), brain temperature decreased (with statistical significance, p<0.05), compared to those of non-user group (Average; 35.9527℃) or conventional wire phone user group. In cellular phone user group (Average; 35.82155℃), brain temperature decreased slightly (without statistical significance, p>0.05) compared to those of non-user group (Average; 35.9527℃) or conventional wire phone user group (Average: 35.922℃). The temperature change was not limited to the mobile phone applied side but on both hemishpere of the brain. Conclusion: In conclusion, mobile phone (especially PCS phone) decreased brain temperature in both hemishperes without side-to-side temperature difference. In addition, this study suggest possibility of radiothermometer application to the study of electromagnetic wave effect and protection method research in the future.