Fast shear compounding using robust 2-d shear wave speed calculation and multi-directional filtering

Research output: Contribution to journalArticle

60 Scopus citations

Abstract

A fast shear compounding method was developed in this study using only one shear wave push-detect cycle, such that the shear wave imaging frame rate is preserved and motion artifacts are minimized. The proposed method is composed of the following steps: 1. Applying a comb-push to produce multiple differently angled shear waves at different spatial locations simultaneously; 2. Decomposing the complex shear wave field into individual shear wave fields with differently oriented shear waves using a multi-directional filter; 3. Using a robust 2-D shear wave speed calculation to reconstruct 2-D shear elasticity maps from each filter direction; and 4. Compounding these 2-D maps from different directions into a final map. An inclusion phantom study showed that the fast shear compounding method could achieve comparable performance to conventional shear compounding without sacrificing the imaging frame rate. A multi-inclusion phantom experiment showed that the fast shear compounding method could provide a full field-of-view, 2-D and compounded shear elasticity map with three types of inclusions clearly resolved and stiffness measurements showing excellent agreement to the nominal values.

Original languageEnglish (US)
Pages (from-to)1343-1355
Number of pages13
JournalUltrasound in Medicine and Biology
Volume40
Issue number6
DOIs
StatePublished - Jun 2014

Keywords

  • 2-D shear wave speed
  • Acoustic radiation force
  • Comb-push
  • Directional filter
  • Shear compounding
  • Shear wave elastography

ASJC Scopus subject areas

  • Biophysics
  • Radiological and Ultrasound Technology
  • Acoustics and Ultrasonics

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