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Proceedings Paper

In-vitro measurements of light transmission parallel and perpendicular to the collagen orientation in tendons
Author(s): Binod KC; Kevin R. Forrester; Dave Irvine-Halliday; Ken Muldrew; Cyril B. Frank; Nigel Shrive; Robert I. Thompson
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Paper Abstract

Collimated light transmission studies of bovine tendon have been carried out to show the collagen waveguide effect. A monochromator/lamp apparatus was used to irradiate tissue samples and the transmitted light intensity was measured parallel and perpendicular to the collagen fiber orientation. The intensity parallel to the collagen fibers was at least twice that seen with perpendicular propagation. This indicates there is less scattering parallel to the fibers and light waveguiding is present for photon scattering. Also, absorption of light due to hemoglobin around 550 nm and due to water at 980nm was more prominent for parallel than perpendicular propagation. The light may travel either through the collagen fibril or fiber bundles or through the interstitial matrix. Sequential tests during tissue dehydration were performed and it was found that the transmitted light intensity increased with dehydration. This suggest that light may not be traveling through the interstitial matrix where water is the major component. Water may be acting as a reflection boundary for the light that is passing through the fibril or fiber bundles. Collagen waveguiding may be utilized to elucidate the collagen structure. Also, tissue water content could be measured from the transmission profiles. These may be of use in diagnosis and repair of connective tissues.

Paper Details

Date Published: 11 April 2000
PDF: 7 pages
Proc. SPIE 3913, In-Vitro Diagnostic Instrumentation, (11 April 2000); doi: 10.1117/12.382027
Show Author Affiliations
Binod KC, Univ. of Calgary (Canada)
Kevin R. Forrester, Univ. of Calgary (Canada)
Dave Irvine-Halliday, Univ. of Calgary (Canada)
Ken Muldrew, Univ. of Calgary (Canada)
Cyril B. Frank, Univ. of Calgary (Canada)
Nigel Shrive, Univ. of Calgary (Canada)
Robert I. Thompson, Univ. of Calgary (Canada)

Published in SPIE Proceedings Vol. 3913:
In-Vitro Diagnostic Instrumentation
Gerald E. Cohn, Editor(s)

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