Open AccessLocalized compliance measurement of the airway wall using anatomic optical coherence elastography
Author(s) -
Ruofei Bu,
Santosh Balakrishnan,
Hillel Price,
Carlton J. Zdanski,
Sorin Mitran,
Amy L. Oldenburg
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.016751
Subject(s) - optical coherence tomography , biomedical engineering , airway , elastography , materials science , medicine , compliance (psychology) , radiology , surgery , ultrasound , psychology , social psychology
We describe an elastographic method to circumferentially-resolve airway wall compliance using endoscopic, anatomic optical coherence tomography (aOCT) combined with an intraluminal pressure catheter. The method was first demonstrated on notched silicone phantoms of known elastic modulus under respiratory ventilation, where localized compliance measurements were validated against those predicted by finite element modeling. Then, ex vivo porcine tracheas were scanned, and the pattern of compliance was found to be consistent with histological identification of the locations of (stiff) cartilage and (soft) muscle. This quantitative method may aid in diagnosis and monitoring of collapsible airway wall tissues in obstructive respiratory disorders.