dc.contributor.author | Myhre, Ola Finneng | |
dc.contributor.author | Johansen, Tonni Franke | |
dc.contributor.author | Angelsen, Bjørn Atle J. | |
dc.date.accessioned | 2017-10-25T07:00:59Z | |
dc.date.available | 2017-10-25T07:00:59Z | |
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/11250/2461992 | |
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 | © 2017 Acoustical Society of America. | nb_NO |
cristin.unitcode | 194,65,25,0 | |
cristin.unitname | Institutt for sirkulasjon og bildediagnostikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.fulltext | postprint | |
cristin.qualitycode | 2 | |