Silicon-photonics focused ultrasound detector for minimally invasive optoacoustic imaging
© 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement..
One of the main challenges in miniaturizing optoacoustic technology is the low sensitivity of sub-millimeter piezoelectric ultrasound transducers, which is often insufficient for detecting weak optoacoustic signals. Optical detectors of ultrasound can achieve significantly higher sensitivities than their piezoelectric counterparts for a given sensing area but generally lack acoustic focusing, which is essential in many minimally invasive imaging configurations. In this work, we develop a focused sub-millimeter ultrasound detector composed of a silicon-photonics optical resonator and a micro-machined acoustic lens. The acoustic lens provides acoustic focusing, which, in addition to increasing the lateral resolution, also enhances the signal. The developed detector has a wide bandwidth of 84 MHz, a focal width smaller than 50 µm, and noise-equivalent pressure of 37 mPa/Hz1/2 - an order of magnitude improvement over conventional intravascular ultrasound. We show the feasibility of the approach and the detector's imaging capabilities by performing high-resolution optoacoustic microscopy of optical phantoms with complex geometries.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:13 |
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| Enthalten in: |
Biomedical optics express - 13(2022), 12 vom: 01. Dez., Seite 6229-6244 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Nagli, Michael [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Revised 11.01.2023 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1364/BOE.470295 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 520 | |a One of the main challenges in miniaturizing optoacoustic technology is the low sensitivity of sub-millimeter piezoelectric ultrasound transducers, which is often insufficient for detecting weak optoacoustic signals. Optical detectors of ultrasound can achieve significantly higher sensitivities than their piezoelectric counterparts for a given sensing area but generally lack acoustic focusing, which is essential in many minimally invasive imaging configurations. In this work, we develop a focused sub-millimeter ultrasound detector composed of a silicon-photonics optical resonator and a micro-machined acoustic lens. The acoustic lens provides acoustic focusing, which, in addition to increasing the lateral resolution, also enhances the signal. The developed detector has a wide bandwidth of 84 MHz, a focal width smaller than 50 µm, and noise-equivalent pressure of 37 mPa/Hz1/2 - an order of magnitude improvement over conventional intravascular ultrasound. We show the feasibility of the approach and the detector's imaging capabilities by performing high-resolution optoacoustic microscopy of optical phantoms with complex geometries | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Koch, Jürgen |e verfasserin |4 aut | |
| 700 | 1 | |a Hazan, Yoav |e verfasserin |4 aut | |
| 700 | 1 | |a Volodarsky, Oleg |e verfasserin |4 aut | |
| 700 | 1 | |a Ravi Kumar, Resmi |e verfasserin |4 aut | |
| 700 | 1 | |a Levi, Ahiad |e verfasserin |4 aut | |
| 700 | 1 | |a Hahamovich, Evgeny |e verfasserin |4 aut | |
| 700 | 1 | |a Ternyak, Orna |e verfasserin |4 aut | |
| 700 | 1 | |a Overmeyer, Ludger |e verfasserin |4 aut | |
| 700 | 1 | |a Rosenthal, Amir |e verfasserin |4 aut | |
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