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J Korean Soc Ther Radiol > Volume 8(2); 1990 > Article
Journal of the Korean Society for Therapeutic Radiology 1990;8(2): 155-162.
Design and Thermal Distribution of Microwave Spiral Antenna
Kyung Ja Lee
Department of Radiology, College of Medicine, Ewha Womans University, Seoul, Korea.
Spiral microwave antennas have been developed and measure the thermal distribution in agar phantom. The design has been configured in three types, 3cm f applicator with 24.5cm length (A type), 4cm f with 12.2cm (B type) and 6cm f with 24.5cm length (C type). The relative specific absorption rate (SAR) measured in phantom have been used to estimate the depth and profile of effective heating. The applicator of copper antenna with 4cm f diameter and 12.2cm length (B type) has the most homogeneous (FWHM=3.5cm) and heating into deep with (Deff=4cm).
Key Words: Hyperthermia, Spiral antenna, Microwave
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