Single-Channel Hadamard Encoded Endoscope for High-Frequency IVUS Imaging

Eric Simpson; Katherine Latham; Christopher Samson; J. K. Woodacre; Tegan Aguinaga; Jeremy A. Brown

doi:10.1109/ULTSYM.2019.8926083

Single-Channel Hadamard Encoded Endoscope for High-Frequency IVUS Imaging

Eric Simpson, Katherine Latham, Christopher Samson, J. K. Woodacre, Tegan Aguinaga, Jeremy A. Brown

Medicine

Medicine

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A new image acquisition scheme is presented that is optimized for applications that require channel-limited transducers such as IVUS. During image acquisition, both the transmit and receive apertures are dynamically phase-encoded with a set of orthogonal (Hadamard) codes. The transducer's excitation and data collection are handled on a single RF channel. Simulations using the Field II software package showed an 18 dB improvement in SNR when compared to a synthetic aperture technique which multiplexes elements into a single RF channel. A 30 MHz transducer with an endoscopic form-factor was fabricated and used to demonstrate data collection and image reconstruction based on this Hadamard-encoding scheme. Experimentally-reconstructed images of a wire-target showed 50 dB of dynamic range.

Original language	English
Title of host publication	2019 IEEE International Ultrasonics Symposium, IUS 2019
Publisher	IEEE Computer Society
Pages	1801-1804
Number of pages	4
ISBN (Electronic)	9781728145969
DOIs	https://doi.org/10.1109/ULTSYM.2019.8926083
Publication status	Published - Oct 2019
Event	2019 IEEE International Ultrasonics Symposium, IUS 2019 - Glasgow, United Kingdom Duration: Oct 6 2019 → Oct 9 2019

Publication series

Name	IEEE International Ultrasonics Symposium, IUS
Volume	2019-October
ISSN (Print)	1948-5719
ISSN (Electronic)	1948-5727

Conference

Conference	2019 IEEE International Ultrasonics Symposium, IUS 2019
Country/Territory	United Kingdom
City	Glasgow
Period	10/6/19 → 10/9/19

Bibliographical note

Publisher Copyright:
© 2019 IEEE.

ASJC Scopus Subject Areas

Acoustics and Ultrasonics

Access to Document

10.1109/ULTSYM.2019.8926083

Cite this

Simpson, E., Latham, K., Samson, C., Woodacre, J. K., Aguinaga, T., & Brown, J. A. (2019). Single-Channel Hadamard Encoded Endoscope for High-Frequency IVUS Imaging. In 2019 IEEE International Ultrasonics Symposium, IUS 2019 (pp. 1801-1804). Article 8926083 (IEEE International Ultrasonics Symposium, IUS; Vol. 2019-October). IEEE Computer Society. https://doi.org/10.1109/ULTSYM.2019.8926083

Single-Channel Hadamard Encoded Endoscope for High-Frequency IVUS Imaging. / Simpson, Eric; Latham, Katherine; Samson, Christopher et al.
2019 IEEE International Ultrasonics Symposium, IUS 2019. IEEE Computer Society, 2019. p. 1801-1804 8926083 (IEEE International Ultrasonics Symposium, IUS; Vol. 2019-October).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Simpson, E, Latham, K, Samson, C, Woodacre, JK, Aguinaga, T & Brown, JA 2019, Single-Channel Hadamard Encoded Endoscope for High-Frequency IVUS Imaging. in 2019 IEEE International Ultrasonics Symposium, IUS 2019., 8926083, IEEE International Ultrasonics Symposium, IUS, vol. 2019-October, IEEE Computer Society, pp. 1801-1804, 2019 IEEE International Ultrasonics Symposium, IUS 2019, Glasgow, United Kingdom, 10/6/19. https://doi.org/10.1109/ULTSYM.2019.8926083

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abstract = "A new image acquisition scheme is presented that is optimized for applications that require channel-limited transducers such as IVUS. During image acquisition, both the transmit and receive apertures are dynamically phase-encoded with a set of orthogonal (Hadamard) codes. The transducer's excitation and data collection are handled on a single RF channel. Simulations using the Field II software package showed an 18 dB improvement in SNR when compared to a synthetic aperture technique which multiplexes elements into a single RF channel. A 30 MHz transducer with an endoscopic form-factor was fabricated and used to demonstrate data collection and image reconstruction based on this Hadamard-encoding scheme. Experimentally-reconstructed images of a wire-target showed 50 dB of dynamic range.",

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Single-Channel Hadamard Encoded Endoscope for High-Frequency IVUS Imaging

Abstract

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