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Quantitative Microwave Breast Phantom Imaging Using a Planar 2.45 GHz System
Mälardalen University, School of Innovation, Design and Engineering. (Inteligent Sensor Systems)
L2S/Supélec/Université Paris-SYD 11. (Département de recherche en électromagnétisme)
L2S/Supélec/Université Paris-SYD 11. (Département de recherche en électromagnétisme)
L2S/Supélec/Université Paris-SYD 11. (Département de recherche en électromagnétisme)
Show others and affiliations
2008 (English)In: (Supélec), XXIX General Assembly of URSI, International Union of Radio Science, Chicago, MO, USA, August, 2008, Chicago, Illinois, USA: XXIX General Assembly of the International Union of Radio Science, URSI , 2008, , p. 4Conference paper, Published paper (Other academic)
Abstract [en]

Breast cancer is a global health problem, needing cheep and effective alternative diagnosis methods in order to minimize the mortality. This experimental study is performed in the context of an ongoing collaborative project towards a future planar three-dimensional microwave breast mammography system. Herein the first quantitative image of an inhomogeneous breast tumor phantom, composed by different Triton X-100/water/salt mixtures, is obtained by using the existing planar 2.45 GHz microwave camera.

Place, publisher, year, edition, pages
Chicago, Illinois, USA: XXIX General Assembly of the International Union of Radio Science, URSI , 2008. , p. 4
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electronics
Identifiers
URN: urn:nbn:se:mdh:diva-5884OAI: oai:DiVA.org:mdh-5884DiVA, id: diva2:217303
Projects
Microwaves in biomedicineAvailable from: 2009-05-14 Created: 2009-05-13 Last updated: 2009-05-14Bibliographically approved
In thesis
1. CONTRIBUTION TO QUANTITATIVE MICROWAVE IMAGING TECHNIQUES FOR BIOMEDICAL APPLICATIONS
Open this publication in new window or tab >>CONTRIBUTION TO QUANTITATIVE MICROWAVE IMAGING TECHNIQUES FOR BIOMEDICAL APPLICATIONS
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This dissertation presents a contribution to quantitative microwave imaging for breast tumor detection. The study made in the frame of a joint supervision Ph.D. thesis between University Paris-SUD 11 (France) and Mälardalen University (Sweden), has been conducted through two experimental microwave imaging setups, the existing 2.45 GHz planar camera (France) and the multi-frequency flexible robotic system, (Sweden), under development. In this context a 2D scalar flexible numerical tool based on a Newton-Kantorovich (NK) scheme, has been developed.

Quantitative microwave imaging is a three dimensional vectorial nonlinear inverse scattering problem, where the complex permittivity of an object is reconstructed from the measured scattered field, produced by the object. The NK scheme is used in order to deal with the nonlinearity and the ill-posed nature of this problem. A TM polarization and a two dimensional medium configuration have been considered in order to avoid its vectorial aspect. The solution is found iteratively by minimizing the square norm of the error with respect to the scattered field data. Consequently, the convergence of such iterative process requires, at least two conditions. First, an efficient calibration of the experimental system has to be associated to the minimization of model errors. Second, the mean square difference of the scattered field introduced by the presence of the tumor has to be large enough, according to the sensitivity of the imaging system.

The existing planar camera associated to a flexible 2D scalar NK code, are considered as an experimental platform for quantitative breast imaging. A preliminary numerical study shows that the multi-view planar system is quite efficient for realistic breast tumor phantoms, according to its characteristics (frequency, planar geometry and water as a coupling medium), as long as realistic noisy data are considered. Furthermore, a multi-incidence planar system, more appropriate in term of antenna-array arrangement, is proposed and its concept is numerically validated.

On the other hand, an experimental work which includes a new fluid-mixture for the realization of a narrow band cylindrical breast phantom, a deep investigation in the calibration process and model error minimization, is presented. This conducts to the first quantitative reconstruction of a realistic breast phantom by using multi-view data from the planar camera. Next, both the qualitative and quantitative reconstruction of 3D inclusions into the cylindrical breast phantom, by using data from all the retina, are shown and discussed. Finally, the extended work towards the flexible robotic system is presented.

Place, publisher, year, edition, pages
Västerås: Mälardalen University, 2009. p. 113
Series
Mälardalen University Press Dissertations, ISSN 1651-4238 ; 73
Keywords
Quantitative Microwave Imaging. Inverse Problems, Nonliear Inverse Scattering, Diffraction Tomography, Breast Tumor Detection, Biomedical Imaging, Mammography, Calibration, Modeling, Planar 2.45 GHz Microwave Camera, Robot-based flexible multi-frequency data acquisition
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Research subject
Electronics
Identifiers
urn:nbn:se:mdh:diva-5882 (URN)978-91-86135-27-0 (ISBN)
Public defence
2009-06-09, Lambda, Högskoleplan 1, Västerås, 09:30 (English)
Opponent
Supervisors
Projects
Microwaves in biomedicine
Note
A dissertation prepared through an international convention for a joint supervision thesis with Université Paris-SUD 11, FranceAvailable from: 2009-05-14 Created: 2009-05-13 Last updated: 2009-05-25Bibliographically approved

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