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Parametric Reconstruction of Objects Using Microwave Measurements
Halmstad University, School of Business and Engineering (SET), Mechanical Engineering and Industrial Design (MTEK), Fotonik.
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Göteborg: Chalmers University of Technology , 2009. , 52 p.
Series
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie, ISSN 0346-718X ; 2924
Keyword [sv]
Mikrovågsteknik
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:hh:diva-6176ISBN: 978-91-7385-243-2 OAI: oai:DiVA.org:hh-6176DiVA: diva2:357930
Public defence
2009-04-28, HC1, Hörsalsvägen 14, Göteborg, 13:15 (English)
Opponent
Supervisors
Available from: 2010-11-09 Created: 2010-10-20 Last updated: 2012-12-12Bibliographically approved
List of papers
1. Microwave Imaging for Mammography using an Iterative Time-Domain Reconstruction Algorithm; Initial Experiments
Open this publication in new window or tab >>Microwave Imaging for Mammography using an Iterative Time-Domain Reconstruction Algorithm; Initial Experiments
2005 (English)In: Proceedings of the 16th International Zurich Symposium on Electromagnetic Compatibility; Topical Meetings, Zürich: Laboratory for Electromagnetic Fields and Microwave Electronics, Swiss Federal Institute of Technology , 2005, 65-70 p.Conference paper, Oral presentation only (Other academic)
Abstract [en]

Using the microwave imaging technique for mammographic imaging is an interesting application and a growing research field. Compared to X-ray mammography there is potentially a significant benefit in using microwaves in the diagnosis of breast cancer tumours due to the high contrast in the dielectric properties between tumour and surrounding tissue.In this paper a tomographic microwave imaging ex- periment using transient time domain field data for the reconstruction process. A 2D iterative gradient based al- gorithm based on the FDTD-method (Finite Difference Time Domain-method), is used for the image reconstruction. The reconstructions have been performed using air as the background medium. To simulate more tissue like conditions the antennas have also been immersed in water and different objects immersed in the water have been imaged. Two different antenna models in the computations have also been tested. The results are promising and encourages further research on this method

Place, publisher, year, edition, pages
Zürich: Laboratory for Electromagnetic Fields and Microwave Electronics, Swiss Federal Institute of Technology, 2005
Keyword
Microwave Imaging, Mammography
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-1948 (URN)2082/2343 (Local ID)2082/2343 (Archive number)2082/2343 (OAI)
Conference
16th International Zurich Symposium on Electromagnetic Compatibility, Zurich, Switzerland, February 13-18, 2005
Available from: 2008-09-23 Created: 2008-09-23 Last updated: 2013-11-15Bibliographically approved
2. Imaging of metal prostheses in the human body: experiments and simulations
Open this publication in new window or tab >>Imaging of metal prostheses in the human body: experiments and simulations
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2005 (English)In: Proc. RVK 05, Radiovetenskap och kommunikation, Linköping, Sweden, June 14-16 2005, Svenska Nationalkommittén för radiovetenskap (SNRV) , 2005, 67-70 p.Conference paper, Published paper (Other academic)
Abstract [en]

In this paper with present the experimental results of imaging a 12mm copper rod immersed in water with a relative permittivity of ε = 78 , σ = 0.2. A copper rod is a simpler object to analyze for these first series of investigations than a hip prostesis. One should note that it has a relative permeability μ = μ0. The prosteses is also manufactured using titanium and it posseses a similiar permeability to that of copper. The setup used is very similiar to that proposed for the detection of breast cancer tumors [1],[2].The metalic rod is immeresed in water and is surrounded by an array of transceivers. The multi static data matrix is recorded as a function of frequency on the boundary of the medium under test. The multi static data matrix is a square complex symmetrix matrix. The elements consist of the received relative amplitude and phase between each sensor element as a function of frequency. A vector network analyzer and a switching matrix is used as the transceiver module. The mulitstatic data matrix is fourier transformed to time domain in order to be used in the FDTD based algorithm. The imaging algorithm used is similiar but a modified version to that proposed by Tanaka, Takenaka, He[3] and Gustafsson,He [4].The results of these first attempts to image metalic object are very promising and one can potentially use the proposed setup in various fields of medical imaging.

Place, publisher, year, edition, pages
Svenska Nationalkommittén för radiovetenskap (SNRV), 2005
Keyword
Imaging, Metal prostheses
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-1950 (URN)2082/2345 (Local ID)2082/2345 (Archive number)2082/2345 (OAI)
Conference
RadioVetenskap och Kommunikation, Linköping, June 14-16, 2005
Available from: 2008-09-23 Created: 2008-09-23 Last updated: 2013-11-15Bibliographically approved
3. Experimental Results of an Optimization Approach to Two Dimensional Time Domain Electromagnetic Inverse Problem With Application to Microwave Breast Tomography
Open this publication in new window or tab >>Experimental Results of an Optimization Approach to Two Dimensional Time Domain Electromagnetic Inverse Problem With Application to Microwave Breast Tomography
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2005 (English)In: Proceedings of the third IASTED International Conference on Biomedical Engineering: February 16-18, 2005, Innsbruck, Austria / [ed] K.-P. Adlassnig, M. Bracale, Anaheim, CA: ACTA Press, 2005, 192-196 p.Conference paper, Published paper (Refereed)
Abstract [en]

Microwave Imaging is an interesting tool and a growing research field in a number of applications. Compared to X--ray mammography there is potentially a significant benefit in using microwaves in the diagnosis of breast cancer tumors due to the high contrast in the dielectric properties between tumor and surrounding tissue. This paper is based on the first series of experimental results of a 2D iterative gradient algorithm based on the FDTD method (Finite Difference Time Domain method), which can be applied to microwave breast cancer imaging and possibly hip prosthesis dislocation.

Place, publisher, year, edition, pages
Anaheim, CA: ACTA Press, 2005
Keyword
FDTD, microwave imaging, optimization, reconstruction, breast cancer
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hh:diva-1955 (URN)2-s2.0-27844576799 (Scopus ID)2082/2350 (Local ID)0-88986-476-4 (ISBN)0-88986-478-0 (ISBN)9780889864764 (ISBN)2082/2350 (Archive number)2082/2350 (OAI)
Conference
Third IASTED International Conference on Biomedical Engineering, February 16-18, 2005, Innsbruck, Austria
Note

Track: 458-809

Available from: 2008-09-24 Created: 2008-09-24 Last updated: 2013-11-15Bibliographically approved

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