Towards real time assessment of intramuscular fat content in meat using optical fibre-based optical coherence tomography

Thampi, Abi; Hitchman, Sam; Coen, Stéphane; Vanholsbeeck, Frédérique

doi:10.48550/arxiv.2005.12671

Cited by 1 publication

(1 citation statement)

References 21 publications

(22 reference statements)

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“…A custom PS-OCT system, described previously, 47 was used for the imaging. Briefly, a sweptsource system with a center wavelength of 1310 nm, full width half maximum bandwidth of 100 nm, and 50 kHz repetition rate was used.…”

Section: Oct and Image Analysismentioning

confidence: 99%

Impact-Induced Cartilage Damage Assessed using Polarisation-Sensitive Optical Coherence Tomography

Goodwin¹,

Workman²,

Thambyah³

et al. 2020

Preprint

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Significance: Non-invasive determination of structural changes in articular cartilage immediately after impact and rehydration provides insight into the response and recovery of the soft tissue, as well as provides a potential methodology for clinicians to quantify early degenerative changes. Aim: To apply Polarisation-Sensitive Optical Coherence Tomography (PS-OCT) to examine subtle alterations of the optical properties in healthy and early-stage degenerate articular cartilage immediately after impact loading to identify structurally relevant metrics required for understanding the mechanical factors of osteoarthritic initiation and progression. Approach: A custom-designed impact testing rig was used to deliver 0.9 J and 1.4 J impact energies to bovine articular cartilage. A total of 55 (n=28 healthy, n=27 mildly degenerate) cartilage-on-bone samples were imaged before, immediately after, and 3 hours after impact. PS-OCT images were analysed to assess changes relating to surface irregularity, optical attenuation, and birefringence. Results: Mildly degenerate cartilage exhibits a significant change in birefringence following 1.4 J impact energies compared to healthy samples which is believed to be attributable to degenerate cartilage being unable to fully utilise the fluid phase to distribute and dampen the energy. After rehydration, the polarisation-sensitive images appear to 'optically-recover' reducing the reliability of birefringence as an absolute metric. Surface irregularity and optical attenuation encode diagnostically relevant information and may serve as markers to predict the mechanical response of articular cartilage. Conclusion: Subtle alterations in the collagen network associated with early stage degeneration can influence the mechanical response to impact loading. PS-OCT with its ability to non-invasively image the sub-surface microstructural abnormalities of cartilage presents as an ideal modality for cartilage degeneration assessment and identification of mechanically vulnerable tissue.

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Section: Oct and Image Analysismentioning

confidence: 99%