Delay-encoded harmonic imaging (DE-HI) in multiplane-wave compounding

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The development of ultrafast ultrasound imaging brings great opportunities to improve imaging technologies such as shear wave elastography and ultrafast Doppler imaging. In ultrafast imaging, there are trade-offs among image signal-to-noise ratio (SNR), resolution, and the high frame rate. Multiplane wave (MW) imaging is proposed to solve this tradeoff by encoding multiple plane waves with positive/negative pulse polarities during one transmission event (i.e., pulse-echo event), to improve SNR in ultrafast imaging. However, it suffers from stronger reverberation clutters in B-mode images compared to standard plane wave compounding due to longer transmitted pulses. In this paper, we propose a delay-encoded harmonic imaging (DE-HI) technique to implement HI in MW compounding. It encodes the 2nd harmonic signals with 1/4 period delay calculated at the transmit center frequency during MW transmissions, rather than reversing the pulse polarity. This is because the 2nd harmonic signals cannot be encoded by pulse inversion. Received DE-HI signals can then be decoded in the frequency domain to recover the signals as in single plane wave emissions, but mainly with increased SNR at the 2nd harmonic component instead of the fundamental component. DE-HI reduces image clutters as in HI and improves image SNR as in MW. The image quality enhancement was demonstrated by an in-vivo human liver study, in which DE-HI provided enhanced contrast-to-noise ratio (CNR) and vessel identification, as compared to plane wave fundamental imaging, MW compounding, and plane wave HI without coding. The enhanced imaging quality and potential high frame rate of DE-HI made the method promising for a wide spectrum of imaging applications.

Original languageEnglish (US)
Title of host publication2017 IEEE International Ultrasonics Symposium, IUS 2017
PublisherIEEE Computer Society
ISBN (Electronic)9781538633830
DOIs
StatePublished - Oct 31 2017
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: Sep 6 2017Sep 9 2017

Other

Other2017 IEEE International Ultrasonics Symposium, IUS 2017
CountryUnited States
CityWashington
Period9/6/179/9/17

Fingerprint

compounding
harmonics
plane waves
signal to noise ratios
pulses
clutter
polarity
coding
reversing
reverberation
tradeoffs
liver
imaging techniques
S waves
vessels
echoes
inversions
augmentation

Keywords

  • Delay-encoding
  • Harmonic imaging
  • Multiplane wave imaging
  • Ultrafast imaging

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Gong, P., Song, P., & Chen, S. D. (2017). Delay-encoded harmonic imaging (DE-HI) in multiplane-wave compounding. In 2017 IEEE International Ultrasonics Symposium, IUS 2017 [8092620] IEEE Computer Society. https://doi.org/10.1109/ULTSYM.2017.8092620

Delay-encoded harmonic imaging (DE-HI) in multiplane-wave compounding. / Gong, Ping; Song, Pengfei; Chen, Shigao D.

2017 IEEE International Ultrasonics Symposium, IUS 2017. IEEE Computer Society, 2017. 8092620.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gong, P, Song, P & Chen, SD 2017, Delay-encoded harmonic imaging (DE-HI) in multiplane-wave compounding. in 2017 IEEE International Ultrasonics Symposium, IUS 2017., 8092620, IEEE Computer Society, 2017 IEEE International Ultrasonics Symposium, IUS 2017, Washington, United States, 9/6/17. https://doi.org/10.1109/ULTSYM.2017.8092620
Gong P, Song P, Chen SD. Delay-encoded harmonic imaging (DE-HI) in multiplane-wave compounding. In 2017 IEEE International Ultrasonics Symposium, IUS 2017. IEEE Computer Society. 2017. 8092620 https://doi.org/10.1109/ULTSYM.2017.8092620
Gong, Ping ; Song, Pengfei ; Chen, Shigao D. / Delay-encoded harmonic imaging (DE-HI) in multiplane-wave compounding. 2017 IEEE International Ultrasonics Symposium, IUS 2017. IEEE Computer Society, 2017.
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