An agar phantom for hyperthermia

Hirokazu Kato, Masahiro Hiraoka, Tetsuya Ishida

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    21 Scopus citations

    Abstract

    An agar phantom with wide application in rf heating was developed. The phantom consists of 4 wt./wt. % agar powder, 0.1 wt./wt. % NaN3, 0–0.6 wt./wt. % NaCl, and 95.9–95.3 wt./wt. % water. The conductivity σ (S/m) of the phantom was independent of frequency at 1–40 MHz, being σ=1.74x+0.207 at 23.5±1 °C, where x is the concentration of NaCl (wt./wt. %). The permittivity was nearly equal to 81 in the range of 5–40 MHz and 0–0.6 wt./wt. % of NaCl. The density and the heat capacity of the phantom were 1.02–103 kg/m3 and 1.00 kcal/kg °C, respectively. The phantom had sufficient mechanical strength to permit construction of a torso 60 cm high. With the addition of a preservative, the phantom could be used for experiments on heating, without degeneration, for over one year.

    Original languageEnglish (US)
    Pages (from-to)396-398
    Number of pages3
    JournalMedical physics
    Volume13
    Issue number3
    DOIs
    StatePublished - May 1986

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    Keywords

    • 87.55.8
    • 87.60.1
    • AGAR
    • DIELECTRIC PROPERTIES
    • HYPERTHERMIA
    • MICROWAVE RADIATION
    • PHANTOMS
    • THERAPY
    • TISSUE-EQUIVALENT MATERIALS

    ASJC Scopus subject areas

    • Biophysics
    • Radiology Nuclear Medicine and imaging

    Cite this

    Kato, H., Hiraoka, M., & Ishida, T. (1986). An agar phantom for hyperthermia. Medical physics, 13(3), 396-398. https://doi.org/10.1118/1.595882