Title :
New method for visualizing three-dimensional electromagnetic power absorption by capsulate liquid crystal dispersed in transparency high-molecular gel phantom
Author :
Suzuki, Y. ; Baba, M. ; Taki, M. ; Fukunaga, K. ; Watanabe, Shigetaka
Author_Institution :
Tokyo Metropolitan Univ., Japan
Abstract :
A new method to measure the temperature distribution due to high frequency electromagnetic field (HF-EMF) power absorption is established. It is intend to develop this for SAR measurement from the temperature elevation. A micro-capsulated thermo-tropic liquid crystal (MTLC) is employed as the temperature probe because of its nature of high resolution and high sensitivity. A high-molecular gel phantom with high transparency and viscosity has been made to realize the visualization technique with MTLC. The complex permittivity of the phantom is adjusted to that of muscle at 900 MHz and 1.45 GHz. The efficiency of the method is proved to visualize the HF-EMF power absorption by carrying out an exposure experiment.
Keywords :
UHF radio propagation; biological effects of fields; data visualisation; dosimetry; electromagnetic wave absorption; gels; liquid crystals; permittivity; phantoms; temperature distribution; temperature measurement; 1.45 GHz; 3D EM power absorption; 900 MHz; HF-EMF dosimetry; MTLC; SAR measurement; electromagnetic field biological effects; high viscosity phantom; microcapsulated thermotropic liquid crystal; muscle complex permittivity; power absorption visualization; specific absorption rate; temperature elevation measurement; temperature probe; transparent high-molecular gel phantom; Electromagnetic measurements; Electromagnetic wave absorption; Frequency measurement; Imaging phantoms; Liquid crystals; Power measurement; Temperature distribution; Temperature measurement; Temperature sensors; Visualization;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2004. CEIDP '04. 2004 Annual Report Conference on
Print_ISBN :
0-7803-8584-5
DOI :
10.1109/CEIDP.2004.1364222
