Design of a dual frequency probe for photoacoustic imaging of the carotid artery

Reza Pakdaman Zangabad, Hendrik J. Vos, Nico De Jong, Antonius F.W. Van Der Steen, Gijs Van Soest

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

A dual frequency probe using a multi-layer piezoelectric material is proposed for simultaneous ultrasound and photoacoustic imaging of the carotid artery with a high resolution ultrasound and a high sensitivity photoacoustic image. The probe consists of lead zirconate titanate (PZT) for ultrasound stack and and polyvinylidene difluoride (PVDF) array for photoacoustic signal reception, which is placed on top of the PZT stack. We used 3D finite element analysis to evaluate a quarter of the full aperture of the dual frequency array, having 48 elements diced PZT-5H for ultrasound pulse-echo and 16 elements of 28µm thick, kerfless PVDF for photoacoustic receiving. We showed that considering the PVDF array as the second matching layer of the ultrasound stack minimized its loading effect at the cost of operating in a higher operation frequency of 9.9 MHz. We modeled a design with and without sub-dicing, where sub-dicing and subsequent suppression of lateral modes allows larger elements and thus larger aperture. The -3dB bandwidth of the ultrasound stack with and without sub-dicing are 87% and 75% relative to the center frequencies. We found a transmit sensitivity of 17 kPa/V and 21 kPa/V for those two realizations respectively.

Original languageEnglish
Title of host publicationIUS 2020 - International Ultrasonics Symposium, Proceedings
Place of PublicationPiscataway, NJ, USA
PublisherIEEE
Number of pages4
ISBN (Electronic)9781728154480
DOIs
Publication statusPublished - 2020
Event2020 IEEE International Ultrasonics Symposium, IUS 2020 - Las Vegas, United States
Duration: 7 Sep 202011 Sep 2020

Publication series

NameIEEE International Ultrasonics Symposium, IUS
Volume2020-September
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2020 IEEE International Ultrasonics Symposium, IUS 2020
CountryUnited States
CityLas Vegas
Period7/09/2011/09/20

Keywords

  • Dual frequency
  • Kerfless array
  • Photoacoustic imaging

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