J025024 Extraction of Anisotropic Information of Bone Tissue and Individual FE Analysis based on X-ray CT images

Abstract

There are many studies of patient-specific stress analyses of musculoskeletal systems based on x-ray CT images. However, conventional finite element models reported in these researches were composed of the elements which have isotropic material properties in spite of the anisotropy of anatomical bony tissue. It means that more accurate analysis of bone requires a huge amount of tiny elements to represent material anisotropy of bone. This study aims to generate a small FE model of bone with anisotropic material properties in order to perform more reliable stress analyses with a personal computer. This paper proposes quantification algorithm of material anisotropy of bone based on micro-focused CT images. A stress analyses were performed and it reveals the consideration of bone anisotropy is important for patient-specific analysis of bone tissue.