Comparative Quantification of Arterial Lipid by Intravascular Photoacoustic-Ultrasound Imaging and Near-Infrared Spectroscopy-Intravascular Ultrasound

Ayeeshik Kole, Yingchun Cao, Jie Hui, Islam A. Bolad, Mouhamad Alloosh, Ji Xin Cheng, Michael Sturek

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Intravascular photoacoustic-ultrasound (IVPA-US) imaging and near-infrared spectroscopy-intravascular ultrasound (NIRS-IVUS) are two hybrid modalities that detect arterial lipid, with comparison necessary to understand the relative advantages of each. We performed in vivo and ex vivo IVPA-US imaging of the iliac arteries of Ossabaw swine with metabolic syndrome (MetS) and lean swine to investigate sensitivity for early-stage atherosclerosis. We repeated imaging ex vivo with NIRS-IVUS for comparison to IVPA-US and histology. Both modalities showed significantly greater lipid in MetS vs. lean swine, but only IVPA-US localized the lipid as perivascular. To investigate late-stage atherosclerosis, we performed ex vivo IVPA-US imaging of a human coronary artery with comparison to NIRS-IVUS and histology. Two advanced fibroatheromas were identified, with agreement between IVPA-measured lipid area and NIRS-derived lipid content. As confirmed histologically, IVPA-US has sensitivity to detect lipid content similar to NIRS-IVUS and provides additional depth resolution, enabling quantification and localization of lipid cores within plaques.

Original languageEnglish (US)
Pages (from-to)211-220
Number of pages10
JournalJournal of cardiovascular translational research
Volume12
Issue number3
DOIs
StatePublished - Jun 15 2019

Keywords

  • Atherosclerosis
  • Human
  • Intravascular imaging
  • Lipid core plaque
  • Near-infrared spectroscopy
  • Perivascular adipose tissue
  • Photoacoustic imaging
  • Swine

ASJC Scopus subject areas

  • Molecular Medicine
  • Genetics
  • Pharmaceutical Science
  • Cardiology and Cardiovascular Medicine
  • Genetics(clinical)

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