Alles, EJ;
Noimark, S;
Papaevangelou, E;
Zhang, EZ;
Beard, PC;
Dcsjardins, AE;
(2018)
Reconfigurable 1.5D Source Arrays for Improved Elevational Focussing in All-Optical Ultrasound Imaging.
In:
2018 IEEE International Ultrasonics Symposium (IUS).
IEEE
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Abstract
Recently, an all-optical ultrasound imaging system was presented that was capable of real-time, video-rate 2D pulse-echo imaging. This was achieved through the use of rapid scanning optics and a centimetre-scale optical ultrasound generator, which allowed for the synthesis of 1D source arrays of arbitrary geometry. Back-scattered ultrasound was recorded using a highly sensitive fibre-optic ultrasound detector. Here, a modification to this system is presented that enabled the synthesis of arbitrary 2D source array geometries. This extension allowed for the implementation of 1.5D arrays, which we demonstrated to yield improved elevational resolution (1.1 mm for 1D arrays versus 0.9 mm for 1.5D arrays)at the expense of a decrease (-3.4 dB)in signal-to-clutter level. The axial (115 μm)and lateral (320 μm)resolutions, as well as the acquisition time, remained unchanged, as was shown using phantoms and ex vivo tissue samples. In addition, the 1.5D source array geometry enabled 3D out-of-plane tracking (0.7 mm resolution across a range of ±1.5 mm)while performing high-quality 2D imaging. The presented ability to synthesise arbitrary, two-dimensional source array geometries will greatly improve and facilitate ultrasound imaging and guidance of interventional procedures.
| Type: | Proceedings paper |
|---|---|
| Title: | Reconfigurable 1.5D Source Arrays for Improved Elevational Focussing in All-Optical Ultrasound Imaging |
| Event: | IEEE International Ultrasonics Symposium (IUS), 22-25 October 2018, Kobe, Japan |
| ISBN-13: | 9781538634257 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ULTSYM.2018.8580210 |
| Publisher version: | https://doi.org/10.1109/ULTSYM.2018.8580210 |
| 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: | Ultrasonic imaging , Optical imaging , Geometry , Two dimensional displays , Apertures , Optical scattering, All-optical ultrasound , reconfigurable array , 1.5D array , elevational resolution , out-of-plane tracking |
| 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/10068071 |
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