Influence Of Backing And Matching Layers In Ultrasound Transducers Performance

dc.creatorDo Nascimento V.M.
dc.creatorNantes Button V.L.D.S.
dc.creatorMaia J.M.
dc.creatorCosta E.T.
dc.creatorOliveira E.J.V.
dc.date2003
dc.date2015-06-30T17:32:14Z
dc.date2015-11-26T14:11:16Z
dc.date2015-06-30T17:32:14Z
dc.date2015-11-26T14:11:16Z
dc.date.accessioned2018-03-28T21:11:48Z
dc.date.available2018-03-28T21:11:48Z
dc.identifier
dc.identifierProceedings Of Spie - The International Society For Optical Engineering. , v. 5035, n. , p. 86 - 96, 2003.
dc.identifier0277786X
dc.identifier10.1117/12.479924
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-0041357087&partnerID=40&md5=c0706ca3ebfd28a21f38552f11380c7a
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/102525
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/102525
dc.identifier2-s2.0-0041357087
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1241687
dc.descriptionIn this work we have investigated the influence of the backing layer composition and the matching layer thickness in the performance of ultrasound transducers constructed with piezoelectric ceramic discs. We have constructed transducers with backing layers of different compositions, using mixtures of epoxy with alumina powder and/or Tungsten powder and with λ/4 or 3λ/4 thickness epoxy matching layers. The evaluation tests were performed in pulse-echo mode, with a flat target, and in transmission/reception mode, with a calibrated PVDF hydrophone. The acoustical field emitted by each transducer was mapped in order to measure the on-axis and transverse field profiles, the aperture size and the beam spreading. The bandwidths of the transducers were determined in pulse-echo mode. Comparing the evaluation tests results of two transducers constructed with the same backing layer, the one constructed with λ/4 thickness epoxy matching layer showed better performance. The results showed that the transducers constructed with epoxy, alumina and Tungsten powders backing layers have larger bandwidth. The larger depth of field was measured for transducers constructed with epoxy and Tungsten powder backing layers. These transducers and those constructed with epoxy, Tungsten and alumina powders backing layers showed the larger field intensities in the measured transverse profiles.
dc.description5035
dc.description
dc.description86
dc.description96
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dc.languageen
dc.publisher
dc.relationProceedings of SPIE - The International Society for Optical Engineering
dc.rightsaberto
dc.sourceScopus
dc.titleInfluence Of Backing And Matching Layers In Ultrasound Transducers Performance
dc.typeActas de congresos


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