Dual-Mode Volumetric Optoacoustic and Contrast Enhanced Ultrasound Imaging with Spherical Matrix Arrays

Justine Robin, Ali Ozbek, Michael Reiss, Xose Luis Dean-Ben, Daniel Razansky

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Spherical matrix arrays represent an advantageous tomographic detection geometry for non-invasive deep tissue mapping of vascular networks and oxygenation with volumetric optoacoustic tomography (VOT). Hybridization of VOT with ultrasound (US) imaging remains difficult with this configuration due to the relatively large inter-element pitch of spherical arrays. We suggest a new approach for combining VOT and US contrast-enhanced 3D imaging employing injection of clinically-Approved microbubbles. Power Doppler (PD) and US localization imaging were enabled with a sparse US acquisition sequence and model-based inversion based on infimal convolution of total variation (ICTV) regularization. In vitro experiments in tissue-mimicking phantoms and in living mouse brain demonstrate the powerful capabilities of the new dual-mode imaging approach attaining 80 \mu m spatial resolution and a more than 10 dB signal to noise improvement with respect to a classical delay and sum beamformer. Microbubble localization and tracking allowed for flow velocity mapping up to 40 mm/s.

Original languageEnglish
Pages (from-to)846-856
Number of pages11
JournalIEEE Transactions on Medical Imaging
Volume41
Issue number4
DOIs
StatePublished - 1 Apr 2022
Externally publishedYes

Keywords

  • Contrast enhanced ultrasound
  • optoacoustic tomography
  • optoacoustic tomography

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