Dosimetry for infant exposures to electronic article surveillance system: posture, physical dimension and anatomy

Bioelectromagnetics
Congsheng Li, Tongning Wu

Abstract

The use of electronic article surveillance (EAS) systems has become popular in many public sites. As a consequence, concern has risen about infant exposure to magnetic fields (MFs) from this kind of device. To evaluate infant exposure to MFs of an EAS system (operating at 125 kHz and 13.56 MHz), we numerically compared dosimetric results among adult, child and infant models. Results revealed that postures insignificantly influenced dosimetric results if there was a similar cross-sectional area under exposure. Although safety limits are unlikely to be exceeded, the infant has higher SAR values for brain and central nervous system tissues compared with adult (1.5x at 125 kHz and 112x at 13.56 MHz), which deserve further investigation. Infant's specific anatomy (e.g., non-proportionally large head and high fat content) did not induce higher SAR values. The numerical models developed in the study (stroller and postured infant models) could be freely used for nonprofit academic research.

References

Dec 25, 2009·Radiation Protection Dosimetry·Peter Dimbylow, Richard Findlay
Mar 10, 2011·Physics in Medicine and Biology·Tongning WuShaoxiang Zhang
Apr 25, 2013·Bioelectromagnetics·Serena FiocchiTheodoros Samaras
Aug 14, 2013·Physics in Medicine and Biology·Akimasa HirataIlkka Laakso
Oct 21, 2014·Bioelectromagnetics·Congsheng LiTongning Wu

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