Aberration correction for biological acoustic impedance microscope

T. Uemura, T. Suzuki, K. Hanai, N. Hozumi, S. Yoshida, K. Kobayashi, S. Yamamoto, Y. Saijo

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This report deals with the scanning acoustic microscope for imaging cross sectional characteristic acoustic impedance of biological soft tissues. A focused pulse wave is transmitted to the object placed on the "rear surface" of a plastic substrate. The reflected signals from the target and reference are interpreted into local acoustic impedance. Two-dimensional profile is obtained by scanning the transducer. This method, using a spherical transducer, produces a significant aberration, because the sound speed of the substrate is different from water that is used as a coupling medium. For this reason the spatial resolution is reduced. The spatial resolution was improved by using 3D deconvolution technique, considering the impulse response of the acoustic system. In addition, as the incidence is not vertical, not only longitudinal wave but also transversal wave is generated in the substrate. Calibration for acoustic impedance was carried out after the deconvolution process, considering the above mentioned oblique incidence.

Original languageEnglish
Title of host publication2009 IEEE International Ultrasonics Symposium and Short Courses, IUS 2009
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Print)9781424443895
Publication statusPublished - 2009
Event2009 IEEE International Ultrasonics Symposium, IUS 2009 - Rome, Italy
Duration: 2009 Sept 202009 Sept 23

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


Conference2009 IEEE International Ultrasonics Symposium, IUS 2009


  • Aberration
  • Acoustic impedanc
  • Biological tissue


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