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Double Resonance Techniques: Overview01:12

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Related Experiment Video

Updated: May 8, 2026

Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization
07:14

Dual Raster-Scanning Photoacoustic Small-Animal Imager for Vascular Visualization

Published on: July 15, 2020

Methods for reverberation suppression utilizing dual frequency band imaging.

Jochen M Rau1, Svein-Erik Måsøy, Rune Hansen

  • 1Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, 7491 Trondheim, Norway. jochen.deibele@rwth-aachen.de

The Journal of the Acoustical Society of America
|August 24, 2013
PubMed
Summary

Dual frequency band imaging (DBI) offers new methods to reduce ultrasound reverberations. Delay corrected subtraction (DCS) and first order content weighting (FOCW) significantly improve image contrast and diagnostic quality.

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Published on: November 3, 2015

Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Signal Processing

Background:

  • Reverberations degrade diagnostic ultrasound image quality by reducing contrast resolution.
  • Tissue harmonic imaging is a common but incomplete method for reducing reverberation artifacts.
  • Dual frequency band imaging (DBI) has been proposed for reverberation suppression by manipulating pulse propagation.

Purpose of the Study:

  • To introduce and evaluate two novel reverberation suppression methods using DBI: delay corrected subtraction (DCS) and first order content weighting (FOCW).
  • To assess the effectiveness of DCS and FOCW in improving image contrast and detail in ultrasound imaging.

Main Methods:

  • Developed DCS and FOCW methods utilizing propagation delay information from dual frequency band transmissions.
  • Employed alternating manipulation pressure to extract first scattering depth information.
  • Estimated first order scattering content in the received signal using FOCW.
  • Applied and evaluated both methods on simulated and in vivo ultrasound data.

Main Results:

  • Both DCS and FOCW demonstrated substantial visual and measurable improvements in image contrast.
  • DCS produced sharper images and preserved more fine details compared to FOCW.
  • FOCW achieved superior reverberation suppression, leading to the highest image contrast.
  • Measured contrast improvement ranged from 8–27 dB for DCS and 4 dB to the dynamic range for FOCW.

Conclusions:

  • DCS and FOCW are effective DBI-based methods for reducing reverberations in diagnostic ultrasound.
  • DCS offers a balance between detail preservation and contrast enhancement.
  • FOCW provides the highest level of reverberation suppression and image contrast improvement.