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CORRELATION OF DIELECTRIC PERMITTIVITY WITH MECHANICAL PROPERTIES IN SOFT TISSUE-MIMICKING POLYACRYLAMIDE PHANTOMS

K. KAMALANAND

Department of Instrumentation Engineering, MIT Campus, Anna University, Chennai, 600044, India

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B. T. N. SRIDHAR

Department of Aerospace Engineering, MIT Campus, Anna University, Chennai, 600044, India

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P. M. RAJESHWARI

Marine Sensors and Electronics, National Institute of Ocean Technology, Chennai, 600100, India

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, and

S. RAMAKRISHNAN

Biomedical Engineering Division, Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai, 600036, India

Corresponding author.

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https://doi.org/10.1142/S0219519410003411Cited by:5 (Source: Crossref)

Abstract

In this work, an attempt has been made to correlate the dielectric permittivity of polyacrylamide based tissue mimicking phantoms with their mechanical properties such as breaking stress, breaking strain and Young's modulus. The tissue mimicking phantoms of various concentrations were prepared as per the standard protocol and their permittivity was measured using a precision impedance analyzer. The mechanical properties of the phantoms were measured by conducting tensile tests using a Universal Testing Machine. The measured mechanical properties were correlated with the dielectric permittivity by performing statistical analysis. Results demonstrate that the percentage variation in the mechanical properties correlate well with the percentage variation in the permittivity of the tissue mimicking phantoms. Further, it appears that the changes in the mechanical properties of the phantoms can be estimated by quantifying the changes in their dielectric permittivity. In this paper, the objectives of the study, methodology and significant observations are discussed in detail.

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