Noninvasive Vascular Elastography with Plane Strain Incompressibility Assumption Using Ultrafast Coherent Compound Plane Wave Imaging

Jonathan Poree, Damien Garcia, Boris Chayer, Jacques Ohayon, Guy Cloutier

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

Plane strain tensor estimation using non-invasive vascular ultrasound elastography (NIVE) can be difficult to achieve using conventional focus beamforming due to limited lateral resolution and frame rate. Recent developments in compound plane wave (CPW) imaging have led to high speed and high resolution imaging. In this study, we present the performance of NIVE using coherent CPW. We show the impact of CPW beamforming on strain estimates compared to conventional focus sequences. To overcome the inherent variability of lateral strains, associated with the low lateral resolution of linear array transducers, we use the plane strain incompressibility to constrain the estimator. Taking advantage of the approximate tenfold increase in frame rate of CPW compared with conventional focus imaging, we introduce a time-ensemble estimation approach to further improve the elastogram quality. By combining CPW imaging with the constrained Lagrangian speckle model estimator, we observe an increase in elastography quality (∼ 10 dB both in signal-to-noise and contrast-to-noise ratios) over a wide range of applied strains (0.02 to 3.2%).

Original languageEnglish (US)
Article number7140805
Pages (from-to)2618-2631
Number of pages14
JournalIEEE Transactions on Medical Imaging
Volume34
Issue number12
DOIs
StatePublished - Dec 2015

Keywords

  • Strain imaging
  • ultrafast coherent plane wave compounding
  • ultrasound elastography
  • Vascular imaging

ASJC Scopus subject areas

  • Software
  • Radiological and Ultrasound Technology
  • Computer Science Applications
  • Electrical and Electronic Engineering

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