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Design and optimization of na ultra wideband and compact microwave antenna for radiometric monitoring of brain temperature

2014-07Journal article Restricted access
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dc.contributor.authorRodrigues, Dário B.
dc.contributor.authorMaccarini, Paolo F.
dc.contributor.authorSalahi, Sara
dc.contributor.authorOliveira, Tiago R.
dc.contributor.authorPereira, Pedro Jorge da Silva
dc.contributor.authorLimão-Vieira, Paulo
dc.contributor.authorSnow, Brent W.
dc.contributor.authorReudink, Doug
dc.contributor.authorStauffer, Paul R.
dc.date.accessioned2015-08-25T13:48:11Z
dc.date.available2015-08-25T13:48:11Z
dc.date.issued2014-07
dc.description.abstractWe present the modeling efforts on antenna design and frequency selection to monitor brain temperature during prolonged surgery using noninvasive microwave radiometry. A tapered log-spiral antenna design is chosen for its wideband characteristics that allow higher power collection from deep brain. Parametric analysis with the software HFSS is used to optimize antenna performance for deep brain temperature sensing. Radiometric antenna efficiency (eta) is evaluated in terms of the ratio of power collected from brain to total power received by the antenna. Anatomical information extracted from several adult computed tomography scans is used to establish design parameters for constructing an accurate layered 3-D tissue phantom. This head phantom includes separate brain and scalp regions, with tissue equivalent liquids circulating at independent temperatures on either side of an intact skull. The optimized frequency band is 1.1-1.6 GHz producing an average antenna efficiency of 50.3% from a two turn log-spiral antenna. The entire sensor package is contained in a lightweight and low-profile 2.8 cm diameter by 1.5 cm high assembly that can be held in place over the skin with an electromagnetic interference shielding adhesive patch. The calculated radiometric equivalent brain temperature tracks within 0.4 degrees C of the measured brain phantom temperature when the brain phantom is lowered 10. C and then returned to the original temperature (37 degrees C) over a 4.6-h experiment. The numerical and experimental results demonstrate that the optimized 2.5-cm log-spiral antenna is well suited for the noninvasive radiometric sensing of deep brain temperature.por
dc.identifier.citationRODRIGUES, Dário B.; [et al] – Design and optimization of na ultra wideband and compact microwave antenna for radiometric monitoring of brain temperature. IEEE Transactions on Biomedical Engineering. ISSN: 0018-9294. Vol. 61, nr. 7 (2014), pp. 2154-2160por
dc.identifier.doi10.1109/TBME.2014.2317484
dc.identifier.issn0018-9294
dc.identifier.issn1558-2531
dc.identifier.urihttp://hdl.handle.net/10400.21/5003
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherIEEE - Institute of Electrical and Electronics Engineers Inc.por
dc.relation.publisherversionhttp://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6798662
dc.subjectAntenna Designpor
dc.subjectBrain Temperaturepor
dc.subjectLog-Spiral Antennapor
dc.subjectMicrowave Radiometrypor
dc.subjectNoninvasive Monitoringpor
dc.titleDesign and optimization of na ultra wideband and compact microwave antenna for radiometric monitoring of brain temperaturepor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage2160por
oaire.citation.issue7por
oaire.citation.startPage2154por
oaire.citation.titleIEEE Transactions on Biomedical Engineeringpor
oaire.citation.volume61por
rcaap.rightsclosedAccesspor
rcaap.typearticlepor

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