Automatic Segmentation of Trabecular Bone Based on Sphere Fitting for Micro-CT Bone Analysis


KIPS Transactions on Software and Data Engineering, Vol. 3, No. 8, pp. 329-334, Aug. 2014
10.3745/KTSDE.2014.3.8.329,   PDF Download:

Abstract

In this study, a new method that automatically segments trabecular bone for its morphological analysis using micro-computed tomography imaging was proposed. In the proposed method, the bone region was extracted using a threshold value, and the outer boundary of the bone was detected. The sphere of maximum size with the corresponding voxel as the center was obtained by applying the sphere-fitting method to each voxel of the bone region. If this sphere includes the outer boundary of the bone, the voxels included in the sphere are classified as cortical bone; otherwise, they are classified as trabecular bone. The proposed method was applied to images of the distal femurs of 15 mice, and comparative experiments, with results manually divided by a person, were performed. Four morphological parameters.BV/TV, Tb.Th, Tb.Sp, and Tb.N.for the segmented trabecular bone were measured. The results were compared by regression analysis and the Bland-Altman method; BV/TV, Tb.Th, Tb.Sp, and Tb.N were all in the credible range. In addition, not only can the sphere-fitting method be simply implemented, but trabecular bone can also be divided precisely by using the three-dimensional information.


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Cite this article
[IEEE Style]
S. K. Kang, Y. U. Kim, S. T. Jung, "Automatic Segmentation of Trabecular Bone Based on Sphere Fitting for Micro-CT Bone Analysis," KIPS Transactions on Software and Data Engineering, vol. 3, no. 8, pp. 329-334, 2014. DOI: 10.3745/KTSDE.2014.3.8.329.

[ACM Style]
Sun Kyung Kang, Young Un Kim, and Sung Tae Jung. 2014. Automatic Segmentation of Trabecular Bone Based on Sphere Fitting for Micro-CT Bone Analysis. KIPS Transactions on Software and Data Engineering, 3, 8, (2014), 329-334. DOI: 10.3745/KTSDE.2014.3.8.329.