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Characterization and analysis of ultra wideband signal absorption rates in breast tissues

Microwave ultra wideband (UWB) technique has been extensively studied as a potential solution for non-ionizing breast cancer detection. Such technique exploits the significant contrast of dielectric properties between normal tissue and tumour with the exposure of UWB signals where the electric fiel...

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Main Author: Mohd Yusoff, Nurul Izzah
Format: Thesis
Language:English
Published: 2011
Online Access:http://psasir.upm.edu.my/id/eprint/41822/1/FK%202011%20153R.pdf
http://psasir.upm.edu.my/id/eprint/41822/
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spelling my.upm.eprints.418222016-03-03T02:09:15Z http://psasir.upm.edu.my/id/eprint/41822/ Characterization and analysis of ultra wideband signal absorption rates in breast tissues Mohd Yusoff, Nurul Izzah Microwave ultra wideband (UWB) technique has been extensively studied as a potential solution for non-ionizing breast cancer detection. Such technique exploits the significant contrast of dielectric properties between normal tissue and tumour with the exposure of UWB signals where the electric field interacts with biological tissue and produces signatures that can be used to differentiate normal over malignant tissue. This research evaluates the interaction of electromagnetic field with layered breast tissue by a computational method of the Specific Absorption Rate (SAR). SAR analytical model for normal and tumour-affected breast tissues are estimated based on the method. SAR is then evaluated in three dimensional simulations of the normal and tumour-affected breast tissues. Parameters of biological tissues included are defined by Cole-Cole dielectric model. Analysis shows that tumour conductivity gives rise to the characteristic of tissue attenuation. It significantly increases power density in all 1. 5 and 10 mm tumour affected breast tissue compared to normal tissues. However, power density in tumour-affected tissue decreases with the size of tumour as a result of the exponential power degradation as the wave penetrates into the tumour at increasing depths. The absorption rate for normal and tumour-affected breast tissues is predicted by the proposed SAR analytical models. Increase of power density results in the increase of SAR values by 37.29%, 37.44% and 37.59% in 1, 5 and 10 mm tumouraffected breast tissues in comparison with the normal tissues. Evaluation by simulation model is in agreement with that of the proposed analytical model. The study reveals the advantage of the method to interact with a slight change of tissue property which is demonstrated by the increased absorption rate in 1 mm tumour-affected breast tissue as opposed to the normal tissue. The characterization of UWB signal absorption rates by normal and tumour-affected breast tissues further indicates the feasibility of the method for breast cancer detection. 2011-05 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/41822/1/FK%202011%20153R.pdf Mohd Yusoff, Nurul Izzah (2011) Characterization and analysis of ultra wideband signal absorption rates in breast tissues. Masters thesis, Universiti Putra Malaysia.
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Microwave ultra wideband (UWB) technique has been extensively studied as a potential solution for non-ionizing breast cancer detection. Such technique exploits the significant contrast of dielectric properties between normal tissue and tumour with the exposure of UWB signals where the electric field interacts with biological tissue and produces signatures that can be used to differentiate normal over malignant tissue. This research evaluates the interaction of electromagnetic field with layered breast tissue by a computational method of the Specific Absorption Rate (SAR). SAR analytical model for normal and tumour-affected breast tissues are estimated based on the method. SAR is then evaluated in three dimensional simulations of the normal and tumour-affected breast tissues. Parameters of biological tissues included are defined by Cole-Cole dielectric model. Analysis shows that tumour conductivity gives rise to the characteristic of tissue attenuation. It significantly increases power density in all 1. 5 and 10 mm tumour affected breast tissue compared to normal tissues. However, power density in tumour-affected tissue decreases with the size of tumour as a result of the exponential power degradation as the wave penetrates into the tumour at increasing depths. The absorption rate for normal and tumour-affected breast tissues is predicted by the proposed SAR analytical models. Increase of power density results in the increase of SAR values by 37.29%, 37.44% and 37.59% in 1, 5 and 10 mm tumouraffected breast tissues in comparison with the normal tissues. Evaluation by simulation model is in agreement with that of the proposed analytical model. The study reveals the advantage of the method to interact with a slight change of tissue property which is demonstrated by the increased absorption rate in 1 mm tumour-affected breast tissue as opposed to the normal tissue. The characterization of UWB signal absorption rates by normal and tumour-affected breast tissues further indicates the feasibility of the method for breast cancer detection.
format Thesis
author Mohd Yusoff, Nurul Izzah
spellingShingle Mohd Yusoff, Nurul Izzah
Characterization and analysis of ultra wideband signal absorption rates in breast tissues
author_facet Mohd Yusoff, Nurul Izzah
author_sort Mohd Yusoff, Nurul Izzah
title Characterization and analysis of ultra wideband signal absorption rates in breast tissues
title_short Characterization and analysis of ultra wideband signal absorption rates in breast tissues
title_full Characterization and analysis of ultra wideband signal absorption rates in breast tissues
title_fullStr Characterization and analysis of ultra wideband signal absorption rates in breast tissues
title_full_unstemmed Characterization and analysis of ultra wideband signal absorption rates in breast tissues
title_sort characterization and analysis of ultra wideband signal absorption rates in breast tissues
publishDate 2011
url http://psasir.upm.edu.my/id/eprint/41822/1/FK%202011%20153R.pdf
http://psasir.upm.edu.my/id/eprint/41822/
_version_ 1643833109886533632
score 13.211869

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