Original Paper

annals of telecommunications - annales des télécommunications

, Volume 63, Issue 1, pp 65-78

First online:

SAR characterization inside intracranial tumors for case–control epidemiological studies on cellular phones and RF exposure

  • Nadège VarsierAffiliated withDepartment of Electrical Engineering, Tokyo Metropolitan UniversityNational Institute of Information and Communications Technology Email author 
  • , Kanako WakeAffiliated withNational Institute of Information and Communications Technology
  • , Masao TakiAffiliated withDepartment of Electrical Engineering, Tokyo Metropolitan University
  • , Soichi WatanabeAffiliated withNational Institute of Information and Communications Technology
  • , Toru TakebayashiAffiliated withDepartment of Preventive Medicine and Public Health, Keio University School of Medicine
  • , Naohito YamaguchiAffiliated withDepartment of Hygiene and Public Health, Tokyo Women’s Medical University
  • , Yuriko KikuchiAffiliated withDepartment of Preventive Medicine and Public Health, Keio University School of Medicine

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Abstract

Epidemiological studies investigating whether mobile phone use is related to cancer risk have been conducted in many countries. The purpose of the work reported here was to introduce the dose metric in the exposure assessment, taking into account the spatial distribution of exposure. Distributions of specific absorption rate (SAR) inside 275 cases of brain tumors (participants in the Japanese epidemiological study) were estimated. Phones had been classified into four categories based on SAR distributions and technical specifications. Results were found to be highly dependent on phone categories. Contralateral tumors were generally categorized as non-exposed tumors (max SAR <2.5% of max SAR in the brain) and, for any phone category, the maximum SAR in 75% of the ipsilateral tumors was less than 15% of the maximum SAR in the brain. Three new exposure indices combining the duration and strength of exposure were created to be used in the Japanese epidemiological study on mobile phone use and the risk of gliomas and meningiomas.

Keywords

SAR characterization Mobile phones Epidemiological study Brain tumors RF exposure Cancer risk