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Evaluation of Refraction Effects in Dry Medical Microwave Imaging Setups

2021Journal article Open access
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dc.contributor.authorGodinho, Daniela M.
dc.contributor.authorFelicio, Joao M.
dc.contributor.authorFernandes, Carlos A.
dc.contributor.authorConceicao, Raquel C.
dc.date.accessioned2021-10-20T09:05:22Z
dc.date.available2021-10-20T09:05:22Z
dc.date.issued2021
dc.description.abstractDry microwave imaging (MWI) systems are more practical, hygienic, and fast to operate since they do not require immersion liquid. However, the dielectric contrast between air and the part of the body under examination is larger, causing larger refraction effects. Including refraction in the image reconstruction algorithm significantly increases the computational effort, especially when imaging nonuniform shapes. Hence, our systematic study aims to evaluate the impact of neglecting refraction effects on MWI by using quantitative metrics and define objective guidelines that are lacking in the literature. We perform comparative studies with a spherical numerical phantom (which is typically used to represent simplified breast or head phantoms) by varying the phantom relative permittivity values between 4 and 40, metallic targets diameter between 5 and 15 mm, and the number of probing antennas. Additionally, the refraction effects are evaluated with anthropomorphic body phantoms representing a breast and the axillary region. We numerically and experimentally show that refraction tends to have a greater impact on imaging results when phantom relative permittivity values exceed 8, while it has a minor effect in the remaining tested cases. This favors potential fast real-time image reconstruction. This letter provides useful criteria to decide whether refraction should be considered or not for imaging reconstruction when developing new dry medical MWI setups.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationD.M. Godinho, J.M. Felício, C.A. Fernandes, R.C. Conceição, “Evaluation of Refraction Effects in Dry Medical Microwave Imaging Setups”, IEEE Antennas and Wireless Propagation Letters (ISSN: 1536-1225), vol. 20(4), 617-621, 2021, DOI: 10.1109/LAWP.2021.3059162.pt_PT
dc.identifier.doi10.1109/LAWP.2021.3059162pt_PT
dc.identifier.issn1536-1225
dc.identifier.urihttp://hdl.handle.net/10451/49944
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationFCT under Fellowship SFRH/BD/129230/2017pt_PT
dc.relationFCT/MEC (PIDDAC) under the Strategic Programme UIDB/00645/2020pt_PT
dc.relationFEDER-PT2020 Partnership Agreement under Grant UIDB/EEA/50008/2020pt_PT
dc.relation.publisherversionhttps://ieeexplore.ieee.org/abstract/document/9353986pt_PT
dc.subjectDry microwave imaging setuppt_PT
dc.subjectmedical microwave imaging (MWI)pt_PT
dc.subjectrefractionpt_PT
dc.subjectultrawideband radarpt_PT
dc.titleEvaluation of Refraction Effects in Dry Medical Microwave Imaging Setupspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage621pt_PT
oaire.citation.issue4pt_PT
oaire.citation.startPage617pt_PT
oaire.citation.titleIEEE Antennas and Wireless Propagation Letterspt_PT
oaire.citation.volume20pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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