Fabrication of coaxial and confocal transducer based on sol-gel composite material for optical resolution photoacoustic microscopy

Masayuki Tanabe, Tai Chieh Wu, Makiko Kobayashi, Che Hua Yang

Research output: Contribution to journalJournal Article peer-review

2 Scopus citations

Abstract

We have newly developed coaxial and confocal optical-resolution photoacoustic microscopy based on sol-gel composite materials. This transducer contains a concave-shaped piezoelectric layer with a focus depth of 5 mm and a hole with a diameter of 3 mm at the center to pass a laser beam into a phantom. Therefore, this system can directly detect an excited photoacoustic signal without prisms or acoustic lenses. We demonstrate the capability of the system through pulse-echo and photoacoustic imaging experiments. The center frequency of the fabricated transducer is approximately 7 MHz, and its relative bandwidth is 86%. An ex-vivo experiment is conducted, and photoacoustic signals are clearly obtained. As a result, 2- and 3-dimensional maximum amplitude projection images are reconstructed.

Original languageEnglish
Article number6
JournalDiagnostics
Volume10
Issue number1
DOIs
StatePublished - 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 by the authors.

Keywords

  • Optical-resolution photoacoustic microscopy
  • Photoacoustic imaging
  • Sol-gel composite material
  • Ultrasonic transducer

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