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- W2078462419 abstract "Test structures providing realistic simulations of the layering of body tissues have been used to investigate the radiometric response to be expected from common skin-fat-muscle regions. The electric field distributions in these models have been measured by the nonresonant perturbation method at 3.25 GHz, the mid-frequency of the range used for the radiometric measurements. Investigations have been made of the response patterns of dielectric loaded rectangular TE/sub 10/-mode and cylindrical TE/sub ll/-mode radiometry antennas coupled to uniform media and models of layered tissue regions. Sucrose solutions of 30% to 50% concentration have been used for skin and muscle simulation. At 3 GHz sucrose solutions conveniently provide dielectric properties close to those of medium to high water content tissues. Sheets of thermo-compressed fabric-phenolic resin insulating material have been used for low permittivity fat layer simulation. These provide a relative permittivity of 3.7 and a loss factor of 0.24. Measurements have also been made using porcine skin-fat layers, with the electric field distribution being measured in sucrose solution below the fat. The field perturbers used are hollow glass spheres of about 2 mm diameter, and low permittivity dielectric sheets 1 to 2 mm thick. A linear heterodyne reflectometer is used to measure the amplitude and phase of the reflection coefficient produced by the presence of the perturber in the fields of the test structure." @default.
- W2078462419 created "2016-06-24" @default.
- W2078462419 creator A5025905935 @default.
- W2078462419 date "1995-01-01" @default.
- W2078462419 modified "2023-09-23" @default.
- W2078462419 title "Investigations of the behaviour of microwave thermography antennas when coupled to layered tissue regions" @default.
- W2078462419 doi "https://doi.org/10.1049/ic:19950258" @default.
- W2078462419 hasPublicationYear "1995" @default.
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