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Related Experiment Video

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Coherent multi-transducer ultrasound imaging using diverging waves.

Paul Dryburgh1, Joseph V Hajnal2, Laura Peralta1

  • 1Research Department of Surgical and Interventional Engineering, School of Biomedical Engineering and Imaging Sciences, King's College London, London, SE1 7EH, United Kingdom.

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|February 26, 2026
PubMed
Summary
This summary is machine-generated.

Coherent multi-transducer ultrasound (CoMTUS) now uses diverging waves for improved field of view and calibration. This advanced medical ultrasound technique enhances imaging for better clinical visualization.

Keywords:
BeamformingCoMTUSContrast resolutionDiverging wavesHigh frame rateLarge apertureMulti-arrayUltrasound imaging

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Area of Science:

  • Medical imaging
  • Ultrasound technology
  • Biomedical engineering

Background:

  • Conventional ultrasound imaging faces limitations in achieving large field of view (FoV) and high resolution simultaneously.
  • Coherent multi-transducer ultrasound (CoMTUS) combines data from multiple arrays to overcome aperture size limitations.
  • Accurate array calibration is critical for CoMTUS, but plane wave (PW) methods exhibit limited, depth-dependent FoV overlap, hindering performance.

Purpose of the Study:

  • To extend CoMTUS to diverging wave (DW) imaging for enhanced FoV and calibration robustness.
  • To introduce a novel multi-transmission calibration method for DW echoes.
  • To validate the proposed framework for real-time, online CoMTUS calibration.

Main Methods:

  • CoMTUS was implemented using diverging wave (DW) transmissions instead of plane waves (PWs).
  • A new multi-transmission calibration technique was developed to handle DW echo coherence.
  • Simulations and in vivo experiments (human abdominal aorta) were conducted using two phased arrays.

Main Results:

  • CoMTUS with DWs achieved extended FoV imaging with calibration errors below the diffraction limit.
  • Improved resolution, contrast, and detectability were maintained compared to PW-based CoMTUS.
  • An optimal divergence angle (β∼60°) and steering angle (αmax∼32°) were identified, improving side-to-main lobe ratio by up to 4 dB.
  • Increasing DW transmissions enhanced contrast, with optimal benefits observed up to 11 transmissions.

Conclusions:

  • Diverging wave CoMTUS offers a robust solution for large FoV ultrasound imaging with improved calibration.
  • The proposed multi-transmission calibration method is a significant step toward real-time CoMTUS calibration.
  • This technique has the potential to advance clinical ultrasound applications requiring broad anatomical coverage and high-resolution imaging.