title: Analysis of specific absorption rate and current density in an energy transmission system for a wireless capsule endoscope.
abstract: This paper reports on the electromagnetic influences on the analysis of biological tissue surrounding a prototype energy transmission system for a wireless capsule endoscope. Specific absorption rate (SAR) and current density were analyzed by electromagnetic simulator in a model consisting of primary coil and a human trunk including the skin, fat, muscle, small intestine, blood and backbone. SAR and current density as a function of frequency and output power were analyzed. The SAR was below the basic restrictions of the International Commission on Non-Ionizing Radiation Protection (ICNIRP). At the same time, the results for current density show that the influence on biological tissue was lowest in the 300-400 kHz range, indicating that it was possible to transmit energy safely up to 100 mW.
authors.affiliation: Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan. shiba@bsys.hiroshima-u.ac.jp
authors.forename: Kenji
authors.initials: K
authors.lastname: Shiba
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Nagato
authors.forename: Toshio
authors.initials: T
authors.lastname: Tsuji
authors.forename: Kohji
authors.initials: K
authors.lastname: Koshiji
mesh_terms: D001822:Body Burden; D053705:Capsule Endoscopes; D003198:Computer Simulation; D011211:Electric Power Supplies; D004735:Energy Transfer; D006801:Humans; D008954:Models, Biological; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012062:Relative Biological Effectiveness; D013686:Telemetry / Q000295:instrumentation* / Q000379:methods