SAR distributions in a child head phantom in the vicinity of recent mobile phones

There are growing concerns about possible health effects of electromagnetic field (EMF) by cellular phones. Epidemiological studies have been in progress in order to evaluate the hypothetical relationship between RF exposure by cellular phones and brain tumor risk in children [1][2]. SAR (Specific Absorption Rate, [W/kg]) is one of the important factors to evaluate RF exposure for epidemiological studies on cellular phones. The purpose of our study is to characterize SAR inside a child head due to the use of mobile phones. SAR inside an adult head have been characterized for INTERPHONE study [3][4]. Child heads differ in size from adult heads. Moreover, the antenna structures have been changing with times and embedded in the body of the phones in recent years. Therefore, we measured SAR distributions inside a child and adult head phantom for several cellular phones commercially available in recent year.