글로벌 연구동향
의학물리학
- 2016년 11월호
[Phys Med Biol.] Numerical compliance testing of human exposure to electromagnetic radiation from smart-watches.ETRI, 충남대/ 홍선의,이애경*, 권종화* 박종기*
- 출처
- Phys Med Biol.
- 등재일
- 2016 Oct 7
- 저널이슈번호
- 61(19):6975-6992. Epub 2016 Sep 20.
- 내용
Abstract
In this study, we investigated the electromagnetic dosimetry for smart-watches. At present, the standard for compliance testing of body-mounted and handheld devices specifies the use of a flat phantom to provide conservative estimates of the peak spatial-averaged specific absorption rate (SAR). This means that the estimated SAR using a flat phantom should be higher than the SAR in the exposure part of an anatomical human-body model. To verify this, we numerically calculated the SAR for a flat phantom and compared it with the numerical calculation of the SAR for four anatomical human-body models of different ages. The numerical analysis was performed using the finite difference time domain method (FDTD). The smart-watch models were used in the three antennas: the shorted planar inverted-F antenna (PIFA), loop antenna, and monopole antenna. Numerical smart-watch models were implemented for cellular commutation and wireless local-area network operation at 835, 1850, and 2450 MHz. The peak spatial-averaged SARs of the smart-watch models are calculated for the flat phantom and anatomical human-body model for the wrist-worn and next to mouth positions. The results show that the flat phantom does not provide a consistent conservative SAR estimate. We concluded that the difference in the SAR results between an anatomical human-body model and a flat phantom can be attributed to the different phantom shapes and tissue structures.
Author information
Hong SE1, Lee AK, Kwon JH, Pack JK.
1Radio Technology Research Department, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeongno, Yuseong-gu, Daejeon, Korea.
- 덧글달기
- 이전글 [Med Phys.] A depth-sensing technique on 3D-printed compensator for total body irradiation patient measurement and treatment planning.
- 다음글 [Radiat Oncol. ] A treatment planning study of proton arc therapy for para-aortic lymph node tumors: dosimetric evaluation of conventional proton therapy, proton arc therapy, and intensity modulated radiotherapy.