Ultrasound B‐scan image simulation, segmentation, and analysis of the equine tendon

Meghoufel, A.; Cloutier, Guy; Crevier-Denoix, Nathalie; Guise, Jacques A. de

doi:10.1118/1.3292633

Cited by 8 publications

(2 citation statements)

References 34 publications

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“…Previous studies have demonstrated that fascicle cross section within the equine SDFT appears irregular [46] such that assuming a circular cross section may lead to errors when calculating the stress to apply during FL. This may partially account for the larger variation seen in the microstructural strain response in fatigue-loaded samples.…”

Section: Discussionmentioning

confidence: 99%

Fascicles from energy-storing tendons show an age-specific response to cyclic fatigue loading

Thorpe

Riley

Birch

et al. 2014

J. R. Soc. Interface.

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Some tendons, such as the human Achilles and equine superficial digital flexor tendon (SDFT), act as energy stores, stretching and recoiling to increase efficiency during locomotion. Our previous observations of rotation in response to applied strain in SDFT fascicles suggest a helical structure, which may provide energy-storing tendons with a greater ability to extend and recoil efficiently. Despite this specialization, energy-storing tendons are prone to age-related tendinopathy. The aim of this study was to assess the effect of cyclic fatigue loading (FL) on the microstructural strain response of SDFT fascicles from young and old horses. The data demonstrate two independent age-related mechanisms of fatigue failure; in young horses, FL caused low levels of matrix damage and decreased rotation. This suggests that loading causes alterations to the helix substructure, which may reduce their ability to recoil and recover. By contrast, fascicles from old horses, in which the helix is already compromised, showed greater evidence of matrix damage and suffer increased fibre sliding after FL, which may partially explain the age-related increase in tendinopathy. Elucidation of helix structure and the precise alterations occurring owing to both ageing and FL will help to develop appropriate preventative and repair strategies for tendinopathy.

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Section: Discussionmentioning

confidence: 99%

Fascicles from energy-storing tendons show an age-specific response to cyclic fatigue loading

Thorpe

Riley

Birch

et al. 2014

J. R. Soc. Interface.

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show abstract

“…The thickness of the inter-collagen-bundle space in the SDFT, which contains interfascicular space and interfibrillar space, ranged between 1 and 80 μm. If the thickness of the inter-collagen-bundle space is larger than the wavelength (approximately 54 μm at 30 MHz), strong echoes are acquired from the space, and no specific structures can be observed for the thickness of an inter-collagen-bundle smaller than the wavelength [ 59 ]. Hence, a greater thickness in the inter-collagen-bundle space of the SDFT compared with the A1 pulley would lead the SDFT to have higher backscattering intensity.…”

Section: Discussionmentioning

confidence: 99%

Quantitative Assessment of First Annular Pulley and Adjacent Tissues Using High-Frequency Ultrasound

Yang

Wang

2017

Sensors

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Due to a lack of appropriate image resolution, most ultrasound scanners are unable to sensitively discern the pulley tissues. To extensively investigate the properties of the A1 pulley system and the surrounding tissues for assessing trigger finger, a 30 MHz ultrasound system was implemented to perform in vitro experiments using the hypodermis, A1 pulley, and superficial digital flexor tendon (SDFT) dissected from cadavers. Ultrasound signals were acquired from both the transverse and sagittal planes of each tissue sample. The quantitative ultrasonic parameters, including sound speed, attenuation coefficient, integrated backscatter (IB) and Nakagami parameter (m), were subsequently estimated to characterize the tissue properties. The results demonstrated that the acquired ultrasound images have high resolution and are able to sufficiently differentiate the variations of tissue textures. Moreover, the attenuation slope of the hypodermis is larger than those of the A1 pulley and SDFT. The IB of A1 pulley is about the same as that of the hypodermis, and is very different from SDFT. The m parameter of the A1 pulley is also very different from those of hypodermis and SDFT. This study demonstrated that high-frequency ultrasound images in conjunction with ultrasonic parameters are capable of characterizing the A1 pulley system and surrounding tissues.

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Effect of fatigue loading on structure and functional behaviour of fascicles from energy-storing tendons

et al. 2014

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Please cite this article as: Thorpe, C.T., Riley, G.P., Birch, H.L., Clegg, P.D., Screen, H.R.C., Effect of fatigue loading on structure and functional behaviour of fascicles from energy-storing tendons, Acta Biomaterialia (2014), doi: http://dx.doi.org/10.1016/j.actbio. 2014.04.008 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. substructures which may provide greater elasticity and recovery. In the current study, we 7 assessed how preconditioning and fatigue loading affects the ability of fascicles from the energy-8 storing equine superficial digital flexor tendon to extend and recoil. We hypothesised that 9 preconditioned samples would exhibit changes in microstructural strain response, but would 10 retain their ability to recover. We further hypothesised that fatigue loading would result in

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Ultrasound B‐scan image simulation, segmentation, and analysis of the equine tendon

Abstract: To conclude, this technique may provide a tool for the rapid assessment and characterization of tendon structures to enable clinical identification of the integrity of the SDFT.

Cited by 8 publications

References 34 publications

Fascicles from energy-storing tendons show an age-specific response to cyclic fatigue loading

Fascicles from energy-storing tendons show an age-specific response to cyclic fatigue loading

Quantitative Assessment of First Annular Pulley and Adjacent Tissues Using High-Frequency Ultrasound

Effect of fatigue loading on structure and functional behaviour of fascicles from energy-storing tendons

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