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Proceedings Paper

Evaluation of osteoarthritis progression using polarization-sensitive optical coherence tomography
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Paper Abstract

Osteoarthritis is a prevalent medical condition that presents a diagnostic and therapeutic challenge to physicians today because of the inability to assess the integrity of the articular cartilage early in the disease. Polarization sensitive optical coherence tomography (PS-OCT) is a high resolution, non-contact imaging modality that provides cross-sectional images with additional information regarding the integrity of the collagen matrix. Using PS-OCT to image provides information regarding thickness of the articular cartilage and gives an index of biochemical changes based on alterations in optical properties (i.e. birefringence) of the tissue. We demonstrate initial experiments performed on specimens collected following total knee replacement surgery. Articular cartilage was imaged using a 1310 nm PS-OCT system where both intensity and phase images were acquired. PS-OCT images were compared with histology, and the changes in tissue optical properties were characterized. Analysis of the intensity images demonstrates differences between healthy and diseased cartilage surface and thickness. Phase maps of the tissue demonstrated distinct differences between healthy and diseased tissue. PS-OCT was able to image a gradual loss of birefringence as the tissue became more diseased. In this way, determining the rate of change of the phase provides a quantitative measure of pathology. Thus, imaging and evaluation of osteoarthritis using PS-OCT can be a useful means of quantitative assessment of the disease.

Paper Details

Date Published: 1 July 2004
PDF: 6 pages
Proc. SPIE 5318, Advanced Biomedical and Clinical Diagnostic Systems II, (1 July 2004); doi: 10.1117/12.529593
Show Author Affiliations
Nader A Nassif, Harvard-MIT Div. of Health Science and Technology (United States)
Mark C. Pierce, Harvard Medical School (United States)
B. Hyle Park, Harvard Medical School (United States)
Barry Cense, Massachusetts General Hospital (United States)
Harvard Medical School (United States)
Johannes F. de Boer, Harvard-MIT Div. of Health Sciences and Technology (United States)

Published in SPIE Proceedings Vol. 5318:
Advanced Biomedical and Clinical Diagnostic Systems II
Gerald E. Cohn; Warren S. Grundfest; David A. Benaron; Tuan Vo-Dinh, Editor(s)

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