Delacretaz Y, Shaffer E, Pavillon N, Kuhn J, Lang F, Depeursinge C. Endoscopic low-coherence topography measurement for upper airways and hollow samples.
JOURNAL OF BIOMEDICAL OPTICS 2010;
15:066014. [PMID:
21198188 DOI:
10.1117/1.3512218]
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Abstract
To evaluate the severity of airway pathologies, quantitative dimensioning of airways is of utmost importance. Endoscopic vision gives a projective image and thus no true scaling information can be directly deduced from it. In this article, an approach based on an interferometric setup, a low-coherence laser source and a standard rigid endoscope is presented, and applied to hollow samples measurements. More generally, the use of the low-coherence interferometric setup detailed here could be extended to any other endoscopy-related field of interest, e.g., gastroscopy, arthroscopy and other medical or industrial applications where tri-dimensional topology is required. The setup design with a multiple fibers illumination system is presented. Demonstration of the method ability to operate on biological samples is assessed through measurements on ex vivo pig bronchi.
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