Forward-looking ultrasound imager using convex-shaped 1-3composite transducer for intravascular treatment

J. J. Chen, Y. Haga, O. Oshiro, K. Chihara, M. Esashi

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

3 Citations (Scopus)

Abstract

An intravascular forward-looking ultrasound probe (FLUP) of 3 mm in diameter has been developed. We used the FLUP as acoustic sources and receivers to make an ultrasound forward-looking image, but many artifats were observed because of strong directivity of the FLUP. To confirm the affection of directivity in ultrasound forward-looking images, laser induced breakdown (LIB) was used as a low directional transmitter and a FLUP was used as a receiver, a fine image was successfully obtained because the LIB can provide an almost completely spherical ultrasound pulse wave. For decreasing the directivity of FLUP, a convex-shaped 1-3composite PZT transducer (0.7 mm in diameter and 0.75 mm curvature radius) was fabricated, and low directivity feature was confirmed. A probe which has eight separated 1-3composite convex-shaped transducers were fabricated. The probe is 3 mm in diameter and a working channel is 0.5 mm in diameter. Acoustic pressure was measured using a hydrophone which was located 10mm in front of the FLUP. The emitting acoustic pressure of 40 Pa was realized with the fabricated probe. When the probe was used as acoustic sources and receivers, echo signal of an aluminum plate was observed.

Original languageEnglish
Title of host publication2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
Pages345-348
Number of pages4
DOIs
Publication statusPublished - 2005
Event2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology - Oahu, HI, United States
Duration: 2005 May 122005 May 15

Publication series

Name2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
Volume2005

Other

Other2005 3rd IEEE/EMBS Special Topic Conference on Microtechnology in Medicine and Biology
CountryUnited States
CityOahu, HI
Period05/5/1205/5/15

Keywords

  • 1-3Composite transducer
  • Directivity change
  • Forward looking
  • Ultrasound imaging

ASJC Scopus subject areas

  • Engineering(all)

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