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Dielectric studies of polyvinyl-acetate-based phantom for applications in microwave medical imaging

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Abstract

Phantoms that exhibit complex dielectric properties similar to low water content biological tissues over the electromagnetic spectrum of 2–3 GHz have been synthesized from carbon black powder, graphite powder and polyvinyl-acetate-based adhesive. The materials overcome various problems that are inherent in conventional phantoms such as decomposition and deterioration due to the invasion of bacteria or mold. The absorption coefficients of the materials for various compositions of carbon black and graphite powder are studied. A combination of 50% polyvinyl-acetate-based adhesive, 20% carbon black powder and 30% graphite powder exhibits high absorption coefficient, which suggests another application of the material as good microwave absorber for interior lining of tomographic chamber in microwave imaging. Cavity perturbation technique is adopted to study the dielectric properties of the material.

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Acknowledgement

Authors G. Bindu and Anil Lonappan thankfully acknowledge Council of Scientific and Industrial Research, Government of India for providing Senior Research Fellowships.

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Authors and Affiliations

  1. Department of Electronics, Microwave Tomography and Materials, Research Laboratory, Cochin University of Science and Technology, Cochin, 682 022, India

    G. Bindu, Anil Lonappan, Vinu Thomas, C. K. Aanandan & K. T. Mathew

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  1. G. Bindu
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  2. Anil Lonappan
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  3. Vinu Thomas
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  4. C. K. Aanandan
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  5. K. T. Mathew
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Correspondence to K. T. Mathew.

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Bindu, G., Lonappan, A., Thomas, V. et al. Dielectric studies of polyvinyl-acetate-based phantom for applications in microwave medical imaging. J Mater Sci 41, 7419–7424 (2006). https://doi.org/10.1007/s10853-006-0793-1

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  • DOI: https://doi.org/10.1007/s10853-006-0793-1

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