FDTD analysis of body-core temperature elevation in children and adults for whole-body exposure.
The temperature elevations in anatomically based human phantoms of an adult and a 3-year-old child were calculated for radio-frequency whole-body exposure. Thermoregulation in children, however, has not yet been clarified. In the present study, we developed a computational thermal model of a child that is reasonable for simulating body-core temperature elevation. Comparison of measured and simulated temperatures revealed thermoregulation in children to be similar to that of adults. Based on this finding, we calculated the body-core temperature elevation in a 3-year-old child and an adult for plane-wave exposure at the basic restriction in the international guidelines. The body-core temperature elevation in the 3-year-old child phantom was 0.03 degrees C at a whole-body-averaged specific absorption rate of 0.08 W kg(-1), which was 35% smaller than in the adult female. This difference is attributed to the child's higher body surface area-to-mass ratio.
Hirata
Akimasa
A
Department of Computer Science and Engineering, Nagoya Institute of Technology, Japan. ahirata@nitech.ac.jp
Asano
Takayuki
T
Fujiwara
Osamu
O
D000328:Adult; D001831:Body Temperature / Q000502:physiology* / Q000528:radiation effects*; D002675:Child, Preschool; D003198:Computer Simulation; D004307:Dose-Response Relationship, Radiation; D006801:Humans; D008954:Models, Biological; D011829:Radiation Dosage; D011846:Radio Waves; D014916:Whole-Body Irradiation / Q000379:methods*