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First US Performance Measurements of Next Generation 3D USCT 2.5 Transducers

Zapf, M.; Angerer, M. ORCID iD icon; Hohlfeld, K.; Gebhardt, S.; Gemmeke, H.; Ruiter, N. V.

Abstract (englisch):

The KIT’s 3D Ultrasound Computer Tomography (USCT) II system has a multistatic setup of 2041 ultrasound transducers with approx. 1.5 MHz 6dB bandwidth and 36◦ 3 dB opening angle for 2.5 MHz. To increase the region of interest for a next USCT generation, the opening angle should be increased to approx. 60◦ and the bandwidth doubled. To increase the opening angle the size of the transducer elements was decreased to approximately half the size. A circular aperture was chosen for homogenicity of the radiation pattern in 3D. The transducer design utilizes piezo-fibres by the established Fraunhofer IMT piezo-fibre composite technology. The fibres were fabricated from PZT powder using the polysulfone spinning process. 17 fibres were positioned with a mechanical mask and filled with a matrix of epoxy. From this rod piezo composite discs were sawed and polarized. Electrodes were generated by silver-filled epoxy adhesive on the top and bottom side. Materials for acoustic backing is a Tungsten-Polyurethane composite and for acoustic matching ia aluminium oxide composite material (TMM4). Ultrasound characteristics were evaluated quantitatively with a Onda HNC-400 hydrophone in a 3-axis water tank for a randomly selected sample transducer (see Fig. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136036
Veröffentlicht am 06.08.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Prozessdatenverarbeitung und Elektronik (IPE)
Publikationstyp Proceedingsbeitrag
Publikationsjahr 2021
Sprache Englisch
Identifikator ISBN: 978-3-7315-1054-3
ISSN: 1000124805
KITopen-ID: 1000136036
HGF-Programm 54.12.03 (POF IV, LK 01) Science Systems
Weitere HGF-Programme 54.02.02 (POF III, LK 01) Ultraschnelle Datenauswertung
Erschienen in Proceedings of the International Workshop on Medical Ultrasound Tomography: 14.-15. Oct. 2019, Wayne State University, Detroit, Michigan, USA. Ed.: C. Böhm; T. Hopp; N. Ruiter; N. Duric
Veranstaltung 2nd International Workshop on Medical Ultrasound Tomography (MUST 2019), Detroit, MI, USA, 14.10.2019 – 15.10.2019
Verlag KIT Scientific Publishing
Seiten 273-274
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