1. Optical coherence tomography (OCT) detects collagen within the airway wall extracellular matrix

    Optical coherence tomography (OCT) detects collagen within the airway wall extracellular matrix

    Introduction: Airway diseases are characterized by structural airway remodeling, including extracellular matrix (ECM) changes. Although a key feature, no diagnostic test currently assesses airway remodeling other than invasive airway biopsies. Real-time optical coherence tomography (OCT) generates infrared-based cross-sectional images of airway segments. Previously we reported that OCT identifies and quantifies airway wall layers. We hypothesized that OCT is able to detect collagen deposition areas within the airway wall ECM. Methods: In 5 lobectomy specimens 13 airways were dissected, marked with needles for matching histology and imaged by OCT. Sections were stained for total collagen (TC; pico sirius red) and collagen ...

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