Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images.
We present preliminary results from a method for estimating the optimal effective permittivity for reconstructing microwave-radar images. Using knowledge of how microwave-radar images are formed, we identify characteristics that are typical of good images, and define a fitness function to measure th...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2016-01-01
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| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC5017770?pdf=render |
| _version_ | 1811295090951323648 |
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| author | Benjamin R Lavoie Michal Okoniewski Elise C Fear |
| author_facet | Benjamin R Lavoie Michal Okoniewski Elise C Fear |
| author_sort | Benjamin R Lavoie |
| collection | DOAJ |
| description | We present preliminary results from a method for estimating the optimal effective permittivity for reconstructing microwave-radar images. Using knowledge of how microwave-radar images are formed, we identify characteristics that are typical of good images, and define a fitness function to measure the relative image quality. We build a polynomial interpolant of the fitness function in order to identify the most likely permittivity values of the tissue. To make the estimation process more efficient, the polynomial interpolant is constructed using a locally and dimensionally adaptive sampling method that is a novel combination of stochastic collocation and polynomial chaos. Examples, using a series of simulated, experimental and patient data collected using the Tissue Sensing Adaptive Radar system, which is under development at the University of Calgary, are presented. These examples show how, using our method, accurate images can be reconstructed starting with only a broad estimate of the permittivity range. |
| first_indexed | 2024-04-13T05:28:09Z |
| format | Article |
| id | doaj.art-1ed949a9b92243f6b4aa7062e69ace6c |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-13T05:28:09Z |
| publishDate | 2016-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-1ed949a9b92243f6b4aa7062e69ace6c2022-12-22T03:00:32ZengPublic Library of Science (PLoS)PLoS ONE1932-62032016-01-01119e016084910.1371/journal.pone.0160849Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images.Benjamin R LavoieMichal OkoniewskiElise C FearWe present preliminary results from a method for estimating the optimal effective permittivity for reconstructing microwave-radar images. Using knowledge of how microwave-radar images are formed, we identify characteristics that are typical of good images, and define a fitness function to measure the relative image quality. We build a polynomial interpolant of the fitness function in order to identify the most likely permittivity values of the tissue. To make the estimation process more efficient, the polynomial interpolant is constructed using a locally and dimensionally adaptive sampling method that is a novel combination of stochastic collocation and polynomial chaos. Examples, using a series of simulated, experimental and patient data collected using the Tissue Sensing Adaptive Radar system, which is under development at the University of Calgary, are presented. These examples show how, using our method, accurate images can be reconstructed starting with only a broad estimate of the permittivity range.http://europepmc.org/articles/PMC5017770?pdf=render |
| spellingShingle | Benjamin R Lavoie Michal Okoniewski Elise C Fear Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images. PLoS ONE |
| title | Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images. |
| title_full | Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images. |
| title_fullStr | Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images. |
| title_full_unstemmed | Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images. |
| title_short | Estimating the Effective Permittivity for Reconstructing Accurate Microwave-Radar Images. |
| title_sort | estimating the effective permittivity for reconstructing accurate microwave radar images |
| url | http://europepmc.org/articles/PMC5017770?pdf=render |
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