Download or read book Automated Selection and Entry of Computed Tomography Data in Finite Element Modelling of the Human Femur written by Dawna Rae Greening and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Finite Element Analysis of the Human Femur a Validation Study written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development and Implementation of Subject specific Human Femur Finite Element Models written by Estevan Negrete and published by . This book was released on 2008 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study to develop a procedure for generating human femur finite-element (FE) models from computed tomography (CT) scans of patients, medical imaging software, and finite-element software. Future studies may then use the procedure to quickly produce femur FE models in order to study their response to physiological phenomena, such as loads they experience during lower limb exercises.

Download or read book Finite Element Method and Medical Imaging Techniques in Bone Biomechanics written by Rabeb Ben Kahla and published by John Wiley & Sons. This book was released on 2020-01-02 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Digital models based on data from medical images have recently become widespread in the field of biomechanics. This book summarizes medical imaging techniques and processing procedures, both of which are necessary for creating bone models with finite element methods. Chapter 1 introduces the main principles and the application of the most commonly used medical imaging techniques. Chapter 2 describes the major methods and steps of medical image analysis and processing. Chapter 3 presents a brief review of recent studies on reconstructed finite element bone models, based on medical images. Finally, Chapter 4 reveals the digital results obtained for the main bone sites that have been targeted by finite element modeling in recent years.

Download or read book Master s Theses Directories written by and published by . This book was released on 1999 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Education, arts and social sciences, natural and technical sciences in the United States and Canada".

Download or read book Elastic Properties of the Human Femur written by Annette Bretin and published by . This book was released on 2019-02-04 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Patient-specific finite element modelling of bone is a promising method for surgical planning, implant design and the prediction of bone remodelling or fracture risks, yet the assignment of material properties is challenging. Bone is a complicated structure with direction-dependent, inhomogeneous material properties, influenced by compositional, geometrical and architectural aspects. This volume focuses on a density-based assignment of orthotropic bone properties. Elasticity-density relationships in homogenized femoral zones were examined to evaluate the orthotropic density-dependence of the nine elastic material constants locally. Cortical bone samples were tested in compression and torsion tests using videoextensometry to determine the elastic constants. The elastic properties of cancellous bone were predicted by micro finite element analysis. All determined constants were correlated to the radiological bone mineral density of each sample, which was determined by quantitative computed tomography. The trabecular eigensystem was investigated for each cancellous zone to assign the mean directionality of trabecular fabric. The results can be beneficial for density-based orthotropic material assignment in femoral patient-specific finite element models.

Download or read book Creating and Validating Heterogeneous Tetrahedral Finite Element Models of the Femur from Computed Tomography CT Images written by Tim D. Fawcett and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Finite Element Analysis and Experimental Investigation of Deflections of the Human Femur written by Zain Dweik and published by . This book was released on 2001 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Finite Element Analysis of a Femur to Deconstruct the Design Paradox of Bone Curvature written by Sameer Jade and published by . This book was released on 2012 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The femur is the longest limb bone found in humans. Almost all the long limb bones found in terrestrial mammals, including the femur studied herein, have been observed to be loaded in bending and are curved longitudinally. The curvature in these long bones increases the bending stress developed in the bone, potentially reducing the bone's load carrying capacity, i.e. its mechanical strength. Therefore, bone curvature poses a paradox in terms of the mechanical function of long limb bones. The aim of this study is to investigate and explain the role of longitudinal bone curvature in the design of long bones. In particular, it has been hypothesized that curvature of long bones results in a trade-off between the bone's mechanical strength and its bending predictability. This thesis employs finite element analysis of human femora to address this issue. Simplified human femora with different curvatures were modeled and analyzed using ANSYS Workbench finite element analysis software. The results obtained are compared between different curvatures including a straight bone. We examined how the bone curvature affects the bending predictability and load carrying capacity of bones. Results were post processed to yield probability density functions (PDFs) for circumferential location of maximum equivalent stress for various bone curvatures to assess the bending predictability of bones. To validate our findings on the geometrically simplified ANSYS Workbench femur models, a digitally reconstructed femur model from a CT scan of a real human femur was employed. For this model we performed finite element analysis in the FEA tool, Strand7, executing multiple simulations for different load cases. The results from the CT scanned femur model and those from the CAD femur model were then compared. We found general agreement in trends but some quantitative differences most likely due to the geometric differences between the digitally reconstructed femur model and the simplified CAD models. As postulated by others, our results support the hypothesis that the bone curvature is a trade-off between the bone strength and its bending predictability. Bone curvature increases bending predictability at the expense of load carrying capacity.

Download or read book Bone Geometry from CAT Scans for Finite Element Analysis written by Michael McCarthy and published by . This book was released on 1989 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of an Automated System for Building a Large Population based Statistical Model of Femur Morphology written by Ju Zhang and published by . This book was released on 2013 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studying femur morphology on a large population of computed-tomography (CT) images requires automatic methods. This thesis presents a fully automatic CT-to- model pipeline that accurately segments and models femur morphology. The pipeline is composed of a training phase, where a statistical shape model is created, and a processing phase, which segments and models cortical bone geometry and cancellous bone mineral density (BMD) distribution. Development and testing of the pipeline was carried out on a set of 262 quantitative-CT images from the Victorian Institute of Forensic Medicine (VIFM). In the training phase, corresponding regions on a training-set of 41 femoral surfaces were automatically partitioned and grouped using region-growing and mean-shift clustering. These regions were used to design a region-based quartic-Lagrange femur mesh, which was fitted region-by-region to manually segmented surfaces, to train the femur statistical shape model. Validation experiments showed that this region-based shape model was more accurate and correspondent than an equivalent non-regional model. Cortical bone geometry was automatically extracted and modelled in the first step of the processing phase, using the shape mode above. Active shape modelling and cortical thickness mapping were adapted and combined to mesh the inner and outer cortical surfaces. Segmented meshes were accurate to 0.9 mm root-mean-square (RMS), and cortical thickness to 0.6 mm RMS. The method achieved a success rate of 83%. Cancellous BMD images were automatically segmented and registered in the second step of the processing phase. BMD values from CT images were mapped to a reference volume by radial basis functions (RBFs), which interpolated the mapping between segmented and reference inner cortical surface meshes. Compared to conventional free- form deformation (FFD) registration, RBF registration followed by FFD led to a four- fold reduction in run time, a surface accuracy of 0.76 mm (versus 3.7 mm), and better alignment of anatomical features. Principal component analysis of registered images showed BMD variations in clinically relevant regions. The development of the CT-to-model pipeline has enabled unsupervised data col- lection from VIFM CT scans for scientific and clinical studies of femur morphology. As a general framework, minor modifications of the pipeline will also allow unsupervised data collection for other bones and other image sets.

Download or read book Automated Volumetric Grid Generation for Finite Element Modeling of Human Hand Joints written by and published by . This book was released on 1995 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: We are developing techniques for finite element analysis of human joints. These techniques need to provide high quality results rapidly in order to be useful to a physician. The research presented here increases model quality and decreases user input time by automating the volumetric mesh generation step.

Download or read book Local Anisotropic Material Laws for Patient specific Finite Element Modelling of the Human Femur written by Annette Bretin and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantitative Response Analysis of Human Femur with Prosthesis to Stress Using 3 D Finite Element Method written by Young Il Park and published by . This book was released on 1988 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Internal Organization of the Hominoid Proximal Femur written by David Bernhard Edelman and published by . This book was released on 1997 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Image Based Multilevel Biomechanical Modeling for Fall Induced Hip Fracture written by Yunhua Luo and published by Springer. This book was released on 2017-01-05 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fall-induced hip fracture is an epidemic health risk among elderly people. This book presents an image-based multilevel modeling approach to understanding the biomechanics involved in fall-induced hip fracture. By hierarchically integrating a body-level dynamics model, a femur-level finite element model, and a local bone failure model, the biomechanics approach is able to simulate all stages in sideways falls and to incorporate all biomechanical variables affecting hip fracture. This book is useful for clinicians to accurately evaluate fracture risk, for biomechanical engineers to virtually test hip protective devices, and for biomedical students to learn image-based biomechanical modeling techniques. This book also covers: Biomechanical viewing on bone composition, bone remodeling, and bone strength Bone imaging and information captured for constructing biomechanical models Bone mechanical testing and mechanical properties required for biomechanical modeling

Download or read book Double Experimental Procedure for Model Specific Finite Element Analysis of the Human Femur and Trabecular Bone written by Eduardo Grande García and published by . This book was released on 2013 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt: