Source density apodisation in 2D all-optical ultrasound imaging

Erwin J. Alles; Sacha Noimark; Efthymios Maneas; Wenfeng Xia; Edward Z. Zhang; Paul C. Beard; Ivan P. Parkin; Adrien E. Desjardins

doi:10.1109/ULTSYM.2017.8092387

Source density apodisation in 2D all-optical ultrasound imaging

Erwin J. Alles, Sacha Noimark, Efthymios Maneas, Wenfeng Xia, Edward Z. Zhang, Paul C. Beard, Ivan P. Parkin, Adrien E. Desjardins

UCL University College London

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-review

3 Citations (Scopus)

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.

Original language	English
Title of host publication	2017 IEEE International Ultrasonics Symposium, IUS 2017
Publisher	IEEE Computer Society
ISBN (Electronic)	9781538633830
DOIs	https://doi.org/10.1109/ULTSYM.2017.8092387
Publication status	Published - 31 Oct 2017
Event	2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States Duration: 6 Sept 2017 → 9 Sept 2017

Conference

Conference	2017 IEEE International Ultrasonics Symposium, IUS 2017
Country/Territory	United States
City	Washington
Period	6/09/2017 → 9/09/2017

Keywords

All-optical ultrasound
Aperiodic arrays
Spatial apodisation

Access to Document

10.1109/ULTSYM.2017.8092387

Cite this

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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.",

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author = "Alles, {Erwin J.} and Sacha Noimark and Efthymios Maneas and Wenfeng Xia and Zhang, {Edward Z.} and Beard, {Paul C.} and Parkin, {Ivan P.} and Desjardins, {Adrien E.}",

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language = "English",

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Alles, EJ, Noimark, S, Maneas, E, Xia, W, Zhang, EZ, Beard, PC, Parkin, IP & Desjardins, AE 2017, Source density apodisation in 2D all-optical ultrasound imaging. in 2017 IEEE International Ultrasonics Symposium, IUS 2017., 8092387, IEEE Computer Society, 2017 IEEE International Ultrasonics Symposium, IUS 2017, Washington, United States, 6/09/2017. https://doi.org/10.1109/ULTSYM.2017.8092387

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AU - Alles, Erwin J.

AU - Noimark, Sacha

AU - Maneas, Efthymios

AU - Xia, Wenfeng

AU - Zhang, Edward Z.

AU - Beard, Paul C.

AU - Parkin, Ivan P.

AU - Desjardins, Adrien E.

PY - 2017/10/31

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N2 - 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.

AB - 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.

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KW - Aperiodic arrays

KW - Spatial apodisation

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PB - IEEE Computer Society

T2 - 2017 IEEE International Ultrasonics Symposium, IUS 2017

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ER -

Source density apodisation in 2D all-optical ultrasound imaging

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