Alles, EJ;
Noimark, S;
Maneas, E;
Xia, W;
Zhang, E;
Beard, P;
Parkin, I;
(2017)
Source density apodisation in 2D all-optical ultrasound imaging.
In:
Proceedings of the 2017 IEEE International Ultrasonics Symposium (IUS).
IEEE: Washington, D.C., USA.
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Abstract
In this work, an all-optical ultrasound imaging system that is capable of synthesising arbitrary source aperture geometries is presented. This capability is achieved by delivering focussed excitation light onto a spatially extended generating surface, where ultrasound is generated photoacoustically. Using a scanning mirror, the position of the resulting acoustical source was continuously varied to scan an aperture. This system exhibited sufficient sensitivity to acquire 2D images of clinically relevant tissue in under a second, as demonstrated on a tissue-mimicking phantom. The flexibility in the source array geometry was demonstrated through the implementation of two source array geometries on the same system, which allowed for the direct comparison of the image quality. It was shown that applying source density apodisation to obtain an aperiodic source array resulted in an improvement of up to 5 dB in image contrast, as compared to using a conventional, periodic array exhibiting the same number of sources and spatial extents.
| Type: | Proceedings paper |
|---|---|
| Title: | Source density apodisation in 2D all-optical ultrasound imaging |
| Event: | 2017 IEEE International Ultrasonics Symposium (IUS) |
| Location: | Washington DC |
| Dates: | 06 September 2017 - 09 September 2017 |
| ISBN-13: | 978-1-5386-3383-0 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ULTSYM.2017.8092387 |
| Publisher version: | https://doi.org/10.1109/ULTSYM.2017.8092387 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | All-optical ultrasound, aperiodic arrays, spatial apodisation |
| 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10038061 |
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