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 language | English |
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Article number | 6 |
Journal | Diagnostics |
Volume | 10 |
Issue number | 1 |
DOIs | |
State | Published - 2020 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2019 by the authors.
Keywords
- Optical-resolution photoacoustic microscopy
- Photoacoustic imaging
- Sol-gel composite material
- Ultrasonic transducer