Fabrication of Coaxial and Confocal Transducer Based on Sol-Gel Composite Material for Optical Resolution Photoacoustic Microscopy
| Autor: | Masayuki Tanabe, Che Hua Yang, Makiko Kobayashi, Tai Chieh Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
ultrasonic transducer sol-gel composite material Materials science photoacoustic imaging optical-resolution photoacoustic microscopy Confocal Clinical Biochemistry Resolution (electron density) 01 natural sciences Signal Article Imaging phantom 010309 optics Transducer 0103 physical sciences Ultrasonic sensor Composite material Coaxial Center frequency |
| Zdroj: | Diagnostics; Volume 10; Issue 1; Pages: 6 Diagnostics |
| ISSN: | 2075-4418 |
| DOI: | 10.3390/diagnostics10010006 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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