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This paper describes the development of a human electrical phantom in the low-frequency band. Conventional high-hydrous gel phantoms cannot mimic the electrical properties of the human body in the low-frequency band. Titanium oxide coated with antimony-doped tin oxide (ATO/TiO<inf>2</inf>) was added to the high-hydrous gel phantom, and the electrical properties were evaluated in terms of the amount of material added. The developed phantom had an error of less than 10% in the range of 100 kHz to 1 MHz, which conforms with the electrical properties of human muscles. Particularly, at 125 kHz, the error was 2.71% and 4.35% for relative permittivity and conductivity, respectively. The variation in the electrical properties of the developed phantom was evaluated, and it was confirmed that sufficient reproducibility could be obtained.

Prototype and Evaluation of High-Hydrous Gel Phantom for 100 kHz to 1 MHz Using ATO/TiO2