Comptes Rendus
Electromagnetic fields: from dosimetry to human health
Study of the influence of the laterality of mobile phone use on the SAR induced in two head models
Comptes Rendus. Physique, Volume 14 (2013) no. 5, pp. 418-424.

The objective of this paper is to investigate and to analyse the influence of the laterality of mobile phone use on the exposure of the brain to radio-frequencies (RF) and electromagnetic fields (EMF) from different mobile phone models using the finite-difference time-domain (FDTD) method.

The study focuses on the comparison of the specific absorption rate (SAR) induced on the right and left sides of two numerical adult and child head models. The heads are exposed by both phone models operating in GSM frequency bands for both ipsilateral and contralateral configurations. A slight SAR difference between the two sides of the heads is noted. The results show that the variation between the left and the right sides is more important at 1800 MHz for an ipsilateral use. Indeed, at this frequency, the variation can even reach 20% for the SAR10g and the SAR1g induced in the head and in the brain, respectively. Moreover, the average SAR induced by the mobile phone in the half hemisphere of the brain in ipsilateral exposure is higher than in contralateral exposure. Owing to the superficial character of energy deposition at 1800 MHz, this difference in the SAR induced for the ipsilateral and contralateral usages is more significant at 1800 MHz than at 900 MHz. The results have shown that depending on the phantom head models, the SAR distribution in the brain can vary because of differences in anatomical proportions and in the geometry of the head models. The induced SAR in child head and in sub-regions of the brain is significantly higher (up to 30%) compared to the adult head.

This paper confirms also that the shape/design of the mobile and the location of the antenna can have a large influence at high frequency on the exposure of the brain, particularly on the SAR distribution and on the distinguished brain regions.

Published online:
DOI: 10.1016/j.crhy.2013.02.007
Keywords: Radio-frequency, SAR, FDTD, Laterality, Brain exposure
Amal Ghanmi 1, 2, 3; Nadège Varsier 1, 2; Abdelhamid Hadjem 1, 2; Emmanuelle Conil 1, 2; Odile Picon 3; Joe Wiart 1, 2

1 Orange Labs, France Télécom Division R&D, RESA/WASA, 38–40, rue du Général-Leclerc, 92794 Issy-les-Moulineaux, France
2 WHIST Lab: Orange Labs and Institut Telecom Common Lab, 38–40, rue du Général-Leclerc, 92794 Issy-les-Moulineaux, France
3 ESYCOM, EA2552, université Paris-Est, 5, boulevard Descartes, Champs-sur-Marne, 77454 Marne-la-Vallée cedex 2, France
     author = {Amal Ghanmi and Nad\`ege Varsier and Abdelhamid Hadjem and Emmanuelle Conil and Odile Picon and Joe Wiart},
     title = {Study of the influence of the laterality of mobile phone use on the {SAR} induced in two head models},
     journal = {Comptes Rendus. Physique},
     pages = {418--424},
     publisher = {Elsevier},
     volume = {14},
     number = {5},
     year = {2013},
     doi = {10.1016/j.crhy.2013.02.007},
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Amal Ghanmi; Nadège Varsier; Abdelhamid Hadjem; Emmanuelle Conil; Odile Picon; Joe Wiart. Study of the influence of the laterality of mobile phone use on the SAR induced in two head models. Comptes Rendus. Physique, Volume 14 (2013) no. 5, pp. 418-424. doi : 10.1016/j.crhy.2013.02.007.

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