Fabrication of low directional acoustic transducers for intravascular forward-looking imaging

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

Research output: Contribution to journalConference articlepeer-review

3 Citations (Scopus)

Abstract

This paper describes an intravascular ultrasound forward-looking imaging and a fabrication of low directional acoustic transducer. We used a forward-looking ultrasound probe (FLUP) as acoustic sources and receivers to make an ultrasound forward-looking image, but a clear image could not be obtained because of strong directivity of the FLUP. By using laser induced breakdown (LIB) as acoustic sources and the FLUP as receivers, a fine image of reflector was successfully obtained because of the LIB can provide an almost completely spherical ultrasound pulse wave. For using LIB in a human body, an intravascular fiber-optic ultrasound transmitter was fabricated. A low directional convex shape 1-3 composite PZT transducer (0.7 mm in diameter and 0.75 mm curvature radius) was fabricated. Decreased the directivity of the fabricated convex shape 1 -3 composite PZT was confirmed, and an 8 ring-array convex shape 1-3 composite PZT transducers (3 mm in outside diameter and 1.5 mm in inside diameter) has been fabricated as receivers. These low directional acoustic transducers are suitable for decreasing the directional loss of the echo signal from the reflector.

Original languageEnglish
Pages (from-to)857-860
Number of pages4
JournalProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
Publication statusPublished - 2004
Event17th IEEE International Conference on Micro Electro Mechanical Systems (MEMS): Maastricht MEMS 2004 Technical Digest - Maastricht, Netherlands
Duration: 2004 Jan 252004 Jan 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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