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2 Challenges of Modern Technology

2 2010

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Determination of bone volume porosity based on histograms of the mCT scans

Gadzała P., Szczepański Z., Zych G.

Challenges of Modern Technology

2010

Vol. 1, no. 1

88--89

The new method is proposed in the paper for determination of volume porosity of bone tissue based on histograms of 3D mCT scans and also precise defi nition of the threshold value of relative density preserving calculated volume porosity during the reconstruction of the binary image of sample. In this method the normed histogram is considered as a probability distribution of relative mass density in the bone sample. It was shown that the normed histograms of increasing 3D sample are convergent to the limit curve which can be interpreted as a representative histogram of given sample. The limit histograms have been used to determine: the distributions of relative densities in the sets of voxels of pore and skeleton type and their characteristics, the volume porosities of both samples and thresholds values of their binarisation.

Application of Micro Computer Tomography to Identification of Pore Structure Parameters of Porous Materials

Szczepański Z., Cieszko M., Gadzała P., Zych G.

Challenges of Modern Technology

2010

Vol. 1, no. 1

90--91

The purpose of this paper is to apply the scans of microscopic geometry of human bones obtained by Micro Komputer Tomography method to identifi cation of their macroscopic pore structure parameters: volume porosity, permeability and tortuosity of pores and skeleton. These parameters, except the volume porosity, have been determined by simulations of microscopic processes of viscous fl uid fl ow and electrical current passage through virtual models of bones samples. The simulations wave performed using the COMSOL’s Multiphysics environment assigned for solution of boundary value problems described by partial diff erential equations, by use of the fi nite element method.