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Structural Analysis of Articular Cartilage Using Multiphoton Microscopy: Input for Biomechanical Modeling
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Biomechanics.
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2011 (English)In: IEEE Transactions on Medical Imaging, ISSN 0278-0062, E-ISSN 1558-254X, Vol. 30, no 9, 1635-1648 p.Article in journal (Refereed) Published
Abstract [en]

The 3-D morphology of chicken articular cartilage was quantified using multiphoton microscopy (MPM) for use in continuum-mechanical modeling. To motivate this morphological study we propose aspects of a new, 3-D finite strain constitutive model for articular cartilage focusing on the essential load-bearing morphology: an inhomogeneous, poro-(visco) elastic solid matrix reinforced by an anisotropic, (visco) elastic dispersed fiber fabric which is saturated by an incompressible fluid residing in strain-dependent pores. Samples of fresh chicken cartilage were sectioned in three orthogonal planes and imaged using MPM, specifically imaging the collagen fibers using second harmonic generation. Employing image analysis techniques based on Fourier analysis, we derived the principal directionality and dispersion of the collagen fiber fabric in the superficial layer. In the middle layer, objective thresholding techniques were used to extract the volume fraction occupied by extracellular collagen matrix. In conjunction with information available in the literature, or additional experimental testing, we show how this data can be used to derive a 3-D map of the initial solid volume fraction and Darcy permeability.

Place, publisher, year, edition, pages
2011. Vol. 30, no 9, 1635-1648 p.
Keyword [en]
Cartilage, collagen, constitutive modeling, finite element simulation, multiphoton microscopy, poroelasticity, second harmonic generation
National Category
Computer Science
URN: urn:nbn:se:kth:diva-40653DOI: 10.1109/TMI.2011.2139222ISI: 000294545400005ScopusID: 2-s2.0-80052286618OAI: diva2:443787
QC 20110927Available from: 2011-09-27 Created: 2011-09-20 Last updated: 2011-09-27Bibliographically approved

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Holzapfel, Gerhard A.
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