Enlarged acceptance angle of a finite size detector in photoacoustic imaging using acoustic lenses

Wenfeng Xia, Daniele Piras, Michelle Heijblom, Johan C.G. van Hespen, Spiridon van Veldhoven, Christian Prins, Wiendelt Steenbergen, Ton G. van Leeuwen, Srirang Manohar

Research output: Chapter in Book/Report/Conference proceedingChapterAcademic

3 Citations (Scopus)

Abstract

A large surface area transducer is preferable to be used to detect extremely weak photoacoustic signals in mammography due to its high sensitivity. The lateral resolution is limited by the small acceptance angle of such a transducer. We introduce an excellent material for an acoustic lens used to enlarge the transducer's acceptance angle. Our acoustic characterizations showed that this material has tissue-like acoustic impedance, large speed of sound and low acoustic attenuation. These acoustic properties ensures an excellent acoustic lens material. We further investigated the acoustic irradiation pattern of a 1 MHz, 5 mm x 5 mm single element transducer. Transducer irradiation pattern with and without acoustic lens made from our proposed material and common used lens material are simulated using the Field II program and also the k-wave package. Good agreement has been achieved comparing the simulation results from two different methods. Both simulations show that the proposed material not only enlarged the acceptance angle of the transducer but also minimized the signal loss compared to the common used lens material. We conclude that the proposed material can be used as an excellent acoustic lens for photoacoustic tomography
Original languageEnglish
Title of host publicationNovel Biophotonic Techniques and Applications
Subtitle of host publication22–24 May 2011 Munich, Germany
EditorsHenricus J.C.M. Sterenborg, I. Alex Vitkin
PublisherSPIE
Number of pages11
ISBN (Print)9780819486875
DOIs
Publication statusPublished - 2011
EventEuropean Conference on Biomedical Optics 2011: Novel Biophotonic Techniques and Applications - Munich, Germany
Duration: 22 May 201126 May 2011

Publication series

NameProceedings of SPIE
PublisherSociety of Photo-Optical Instrumentation Engineers
Volume8090
ISSN (Print)0277-786X

Conference

ConferenceEuropean Conference on Biomedical Optics 2011
CountryGermany
CityMunich
Period22/05/1126/05/11

Keywords

  • Photoacoustic
  • Ultrasound transducer
  • Acoustic lens
  • Acceptance angle

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  • Cite this

    Xia, W., Piras, D., Heijblom, M., van Hespen, J. C. G., van Veldhoven, S., Prins, C., ... Manohar, S. (2011). Enlarged acceptance angle of a finite size detector in photoacoustic imaging using acoustic lenses. In H. J. C. M. Sterenborg, & I. A. Vitkin (Eds.), Novel Biophotonic Techniques and Applications: 22–24 May 2011 Munich, Germany [80900L] (Proceedings of SPIE; Vol. 8090). SPIE. https://doi.org/10.1117/12.889970