Coded Excitation in 3D Ultrasound Imaging with a Lensed Row-Column Array

Ali Salari*, Mudabbir Tufail Bhatti, Mélanie Audoin, Borislav Gueorguiev Tomov, Billy Yiu, Erik Vilain Thomsen, Jørgen Arendt Jensen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

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Abstract

Row-column (RC) arrays in volumetric imaging present a potential alternative to typical matrix arrays due to their fewer electrical connections. However, these probes have a limited field of view (FOV), which is rectangular and equal to the probe’s footprint. Using a diverging lens can expand the FOV, but the lens causes wave attenuation, which decreases the signal-to-noise ratio (SNR) and the penetration depth of the probe. This paper hypothesizes that incorporating a lens and coded excitation (CE) can maintain a larger field of view (FOV) in 3D ultrasound imaging while enhancing the signal-to-noise ratio (SNR) and penetration depth. A chirp signal with a center frequency of 6 MHz, a bandwidth of 4 MHz, and a duration of 5 μs was used to evaluate the proposed method. The SNR measured from a cyst phantom increased by approximately 10 dB when using CE compared to single sinusoid excitation. This improvement is comparable to the 8 dB attenuation introduced by the lens. Consequently, the penetration  depth improved by around 100λ while preserving the increased FOV provided by the lens.
Original languageEnglish
Title of host publicationProceedings of SPIE : Medical Imaging 2025: Ultrasonic Imaging and Tomography
Number of pages8
Volume13412
PublisherSPIE - International Society for Optical Engineering
Publication date2025
Article number134120F
DOIs
Publication statusPublished - 2025
EventSPIE Medical Imaging 2025 - San Diego, United States
Duration: 16 Feb 202520 Feb 2025

Conference

ConferenceSPIE Medical Imaging 2025
Country/TerritoryUnited States
CitySan Diego
Period16/02/202520/02/2025
SeriesProceedings of SPIE - The International Society for Optical Engineering
Volume13412
ISSN0277-786X

Keywords

  • 3D ultrasound imaging
  • Row-column array
  • Lenses
  • Beamforming
  • Field of view
  • Coded excitation

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