Brown, MD;
Martin, E;
Cox, BT;
Treeby, BE;
(2016)
Single Pulse Illumination of Multi-Layer Photoacoustic Holograms for Patterned Ultrasound Field Generation.
In:
(Proceedings) IEEE International Ultrasonics Symposium (IUS).
IEEE
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Abstract
A new method for the creation of patterned, focused, optically generated acoustic fields using a single optical pulse is introduced. This utilises multi-layer `holograms' composed of several spatially separate absorbing layers. Each layer is individually patterned so as to focus at a set of targeted points. To create the patterns, a ray-tracing model was implemented to calculate the impulse response of pixels within each absorbing layer to a set of targeted points. An optimisation approach was then used to find the optimal pattern for each layer to create a field evenly focused at each of the target points. The method was validated using both numerical simulations and acoustic field measurements. It was demonstrated that a 3×3 array of acoustic foci could be generated from a 3-layer hologram using a single laser pulse.
| Type: | Proceedings paper |
|---|---|
| Title: | Single Pulse Illumination of Multi-Layer Photoacoustic Holograms for Patterned Ultrasound Field Generation |
| Event: | IEEE International Ultrasonics Symposium (IUS) |
| Location: | Tours, FRANCE |
| Dates: | 18 September 2016 - 21 September 2016 |
| ISBN-13: | 978-1-4673-9897-8 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ULTSYM.2016.7728755 |
| Publisher version: | https://doi.org/10.1109/ULTSYM.2016.7728755 |
| Language: | English |
| Additional information: | Copyright © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
| Keywords: | Science & Technology, Technology, Engineering, Electrical & Electronic, Engineering, FILM |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1531764 |
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