Microscopic visualization of high-frequency ultrasound fields using a newmethod of Schlieren photography

Nobuki Kudo, Yoshiaki Sanbonmatsu, Koichi Shimizu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

We have proposed a new technique for visualization of an ultrasound fieldthat enables acquisition of Schlieren images by subtraction of two shadowgraphstaken in the presence and absence of ultrasound exposure. This technique can beeasily applied to other optical methods because there is no need to use aconventional Schlieren optics. This paper shows the possibility of applying thetechnique to microscopic observation of high-frequency ultrasound fields. Alight source of short pulsed light of 0.11 ns and a CCD camera with a 15 bitdynamic range were installed in an inverted-type microscope. High-frequencyultrasound fields of a miniature 20-MHz transducer for intravascular ultrasoundimaging and a 50-MHz wideband transducer were visualized using 4 and 10objective lenses. Observation results showed that the high-frequency fields weresuccessfully visualized at the maximum spatial resolution of 0.93 m.Transmission and reflection of pulsed ultrasound at a water-Plexiglas interfacewere also observed, and the acquired movie image of ultrasound propagationdemonstrated the importance of this technique for direct understanding ofcomplex acoustic fields.

Original languageEnglish
Title of host publication2010 IEEE International Ultrasonics Symposium, IUS 2010
Pages829-832
Number of pages4
DOIs
Publication statusPublished - 2010
Externally publishedYes
Event2010 IEEE International Ultrasonics Symposium, IUS 2010 - San Diego, CA, United States
Duration: 2010 Oct 112010 Oct 14

Other

Other2010 IEEE International Ultrasonics Symposium, IUS 2010
CountryUnited States
CitySan Diego, CA
Period10/10/1110/10/14

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Keywords

  • High frequency acoustic field
  • optical visualization
  • pressure measurements
  • Schlieren photography

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Kudo, N., Sanbonmatsu, Y., & Shimizu, K. (2010). Microscopic visualization of high-frequency ultrasound fields using a newmethod of Schlieren photography. In 2010 IEEE International Ultrasonics Symposium, IUS 2010 (pp. 829-832). [5935599] https://doi.org/10.1109/ULTSYM.2010.5935599