dc.contributor.author | Myhre, Ola Finneng | |
dc.contributor.author | Johansen, Tonni Franke | |
dc.contributor.author | Angelsen, Bjørn Atle J. | |
dc.date.accessioned | 2017-10-20T11:13:34Z | |
dc.date.available | 2017-10-20T11:13:34Z | |
dc.date.created | 2017-03-10T15:03:10Z | |
dc.date.issued | 2017 | |
dc.identifier.citation | Journal of the Acoustical Society of America. 2017, 141 (2), 1170-1179. | nb_NO |
dc.identifier.issn | 0001-4966 | |
dc.identifier.uri | http://hdl.handle.net/11250/2461259 | |
dc.description.abstract | Dual-frequency band probes are needed for ultrasound (US) reverberation suppression and are useful for image-guided US therapy. A challenge is to design transducer stacks that achieve high bandwidth and efficiency at both operating frequencies when the frequencies are widely separated with a frequency ratio ∼6:1–20:1. This paper studies the loading and backing conditions of transducers in such stacks. Three stack configurations are presented and analyzed using one-dimensional models. It is shown that a configuration with three layers of material separating the transducers is favorable, as it reduces high frequency ringing by ∼20 dB compared to other designs, and matches the low frequency (LF) transducer to the load at a lower frequency. In some cases, the LF load matching is governed by a simple mass–spring interaction in spite of having a complicated matching structure. The proposed design should yield improved performance of reverberation suppression algorithms. Its suitability for reduction of probe heating, also in single-band probes, should be investigated. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Acoustical Society of America | nb_NO |
dc.title | Analysis of acoustic impedance matching in dual-band ultrasound transducers | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 1170-1179 | nb_NO |
dc.source.volume | 141 | nb_NO |
dc.source.journal | Journal of the Acoustical Society of America | nb_NO |
dc.source.issue | 2 | nb_NO |
dc.identifier.doi | 10.1121/1.4976096 | |
dc.identifier.cristin | 1457451 | |
dc.relation.project | Norges forskningsråd: 256290 | nb_NO |
dc.relation.project | Samarbeidsorganet mellom Helse Midt-Norge og NTNU: 46056805 | nb_NO |
dc.description.localcode | Copyright 2017 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in Journal of the Acoustical Society of America and may be found at http://asa.scitation.org/doi/abs/10.1121/1.4976096 | nb_NO |
cristin.unitcode | 194,65,25,0 | |
cristin.unitname | Institutt for sirkulasjon og bildediagnostikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |