High-speed polarization imaging of dynamic collagen fiber realignment in tendon-to-bone insertion region

Xianyu Wu; Mark Pankow; Hsiao-Ying Shadow Huang; Kara Peters

doi:10.1117/1.JBO.23.11.116002

3 November 2018 High-speed polarization imaging of dynamic collagen fiber realignment in tendon-to-bone insertion region

Xianyu Wu, Mark Pankow, Hsiao-Ying Shadow Huang, Kara Peters

Author Affiliations +

Funded by: National Science Foundation (NSF)

Journal of Biomedical Optics, Vol. 23, Issue 11, 116002 (November 2018). https://doi.org/10.1117/1.JBO.23.11.116002

Abstract

A high-speed polarization imaging instrument is demonstrated to be capable of measuring the collagen fiber alignment orientation and alignment strength during high-displacement rate dynamic loading at acquisition rates up to 10 kHz. The implementation of a high-speed rotating quarter wave plate and high-speed camera in the imaging system allows a minimum measurement acquisition time of 6 ms. Sliced tendon-to-bone insertion samples are loaded using a modified drop tower with an average maximum displacement rate of 1.25 m / s, and imaged using a high-speed polarization imaging instrument. The generated collagen fiber alignment angle and strength maps indicate the localized deformation and fiber realignment in tendon-to-bone samples during dynamic loading. The results demonstrate a viable experimental method to monitor collagen fiber realignment in biological tissue under high-displacement rate dynamic loading.

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Xianyu Wu, Mark Pankow, Hsiao-Ying Shadow Huang, and Kara Peters "High-speed polarization imaging of dynamic collagen fiber realignment in tendon-to-bone insertion region," Journal of Biomedical Optics 23(11), 116002 (3 November 2018). https://doi.org/10.1117/1.JBO.23.11.116002

Received: 7 June 2018; Accepted: 15 October 2018; Published: 3 November 2018

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KEYWORDS

Collagen

Polarization

Bone

Tissues

Video

Cameras

High speed cameras

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