Reference : Multifactorial Optimization of Contrast-Enhanced Nanofocus Computed Tomography for Qu...
Scientific journals : Article
Engineering, computing & technology : Multidisciplinary, general & others
Multifactorial Optimization of Contrast-Enhanced Nanofocus Computed Tomography for Quantitative Analysis of Neo-Tissue Formation in Tissue Engineering Constructs.
Sonnaert, Maarten [> >]
Kerckhofs, Greet [> >]
Papantoniou, Ioannis [> >]
Van Vlierberghe, Sandra [> >]
Boterberg, Veerle [> >]
Dubruel, Peter [> >]
Luyten, Frank P. [> >]
Schrooten, Jan [> >]
Geris, Liesbet mailto [Université de Liège > Département d'aérospatiale et mécanique > Génie biomécanique >]
PloS one
Yes (verified by ORBi)
United States
[en] To progress the fields of tissue engineering (TE) and regenerative medicine, development of quantitative methods for non-invasive three dimensional characterization of engineered constructs (i.e. cells/tissue combined with scaffolds) becomes essential. In this study, we have defined the most optimal staining conditions for contrast-enhanced nanofocus computed tomography for three dimensional visualization and quantitative analysis of in vitro engineered neo-tissue (i.e. extracellular matrix containing cells) in perfusion bioreactor-developed Ti6Al4V constructs. A fractional factorial 'design of experiments' approach was used to elucidate the influence of the staining time and concentration of two contrast agents (Hexabrix and phosphotungstic acid) and the neo-tissue volume on the image contrast and dataset quality. Additionally, the neo-tissue shrinkage that was induced by phosphotungstic acid staining was quantified to determine the operating window within which this contrast agent can be accurately applied. For Hexabrix the staining concentration was the main parameter influencing image contrast and dataset quality. Using phosphotungstic acid the staining concentration had a significant influence on the image contrast while both staining concentration and neo-tissue volume had an influence on the dataset quality. The use of high concentrations of phosphotungstic acid did however introduce significant shrinkage of the neo-tissue indicating that, despite sub-optimal image contrast, low concentrations of this staining agent should be used to enable quantitative analysis. To conclude, design of experiments allowed us to define the most optimal staining conditions for contrast-enhanced nanofocus computed tomography to be used as a routine screening tool of neo-tissue formation in Ti6Al4V constructs, transforming it into a robust three dimensional quality control methodology.
FP7 ; 279100 - BRIDGE - Biomimetic process design for tissue regeneration: from bench to bedside via in silico modelling

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