Volumetric laser endomicroscopy interpretation and feature analysis in dysplastic Barrett's esophagus

Amrit K. Kamboj, Allon Kahn, Herbert C. Wolfsen, Arvind J. Trindade, Eric K. Ganguly, Fouad Otaki, Daniel Chan, Liam Zakko, Kavel Visrodia, Lori Lutzke, Kenneth K. Wang, Cadman L. Leggett

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Background and Aim: Volumetric laser endomicroscopy (VLE) is used to identify Barrett's esophagus (BE) dysplasia. Selection of a dysplastic region of interest (ROI) can be challenging due to feature variability across a large amount of data. The degree of agreement among VLE users in selecting a ROI has not been studied. Methods: High-definition videos that divided a VLE scan from 18 patients with biopsy-proven BE dysplasia into 1-cm segments were reviewed using a four-quadrant grid superimposed for systematic interpretation. VLE scans were selected based on image quality and appropriate visualization of BE epithelium. Four experienced VLE users rated each quadrant as dysplastic or non-dysplastic. For quadrants rated as dysplastic, reviewers selected a single timeframe with representative features. A high-degree of agreement among reviewers was defined as ≥75% agreement on the quadrant diagnosis and ≥50% agreement on selected timeframe (±2 s). Results: Thirty-one videos, each 32 s in length, comprising 124 quadrants were reviewed. There was high-agreement among reviewers in 99 (80%) quadrants, of which 68 (69%) were rated as dysplastic. Compared with quadrants rated as non-dysplastic, ROIs of quadrants rated as dysplastic contained a higher number of epithelial glands (12.7 vs 1.2, P < 0.001) with atypical architecture (54 vs 1, P < 0.001). A statistically significant difference was observed between the signal intensity profiles of quadrants rated as dysplastic and quadrants rated as non-dysplastic (P = 0.004). Conclusion: This study highlights that experienced VLE users can identify ROIs with high-degree of agreement. Selected ROIs contained VLE features associated with BE dysplasia.

Original languageEnglish (US)
Pages (from-to)1761-1765
Number of pages5
JournalJournal of Gastroenterology and Hepatology (Australia)
Volume33
Issue number10
DOIs
StatePublished - Oct 1 2018
Externally publishedYes

Keywords

  • advanced endoscopic imaging
  • esophageal adenocarcinoma
  • optical coherence tomography
  • optical frequency domain imaging

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology

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  • Cite this

    Kamboj, A. K., Kahn, A., Wolfsen, H. C., Trindade, A. J., Ganguly, E. K., Otaki, F., Chan, D., Zakko, L., Visrodia, K., Lutzke, L., Wang, K. K., & Leggett, C. L. (2018). Volumetric laser endomicroscopy interpretation and feature analysis in dysplastic Barrett's esophagus. Journal of Gastroenterology and Hepatology (Australia), 33(10), 1761-1765. https://doi.org/10.1111/jgh.14153