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Soft-tissue Deformation for In Vivo Volume Animation

by Taehyun Rhee, J. P. Lewis, Ulrich Neumann, Krishna Nayak
"... Articulated body animation with smooth skin deformation is an important topic in computer graphics. This paper presents a pipeline that extends articulated body deformation to the volume graphics domain. The pipeline consists of in-vivo volume scans, kinematic joint estimation, volumetric joint weig ..."
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weight computation, soft-tissue volume deformation, and direct volume rendering. The result is a fully articulated body volume driven by intuitive joint control that respects rigid deformation of the bone structures and produces smooth deformations of both the skin surface and the interior soft tissue

Wires: A Geometric Deformation Technique

by Karan Singh , Eugene Fiume , 1998
"... Finding effective interactive deformation techniques for complex geometric objects continues to be a challenging problem in modeling and animation. We present an approach that is inspired by armatures used by sculptors, in which wire curves give definition to an object and shape its deformable featu ..."
Abstract - Cited by 171 (7 self) - Add to MetaCart
the shape of an implicit volume in space; and we describe techniques for the aggregation of deformations resulting from multiple wires, domain curves and their interaction with each other and other deformation techniques. The power of our approach is illustrated using applications of animating figures

Soft-tissue simulation using the radial elements methods

by Remis Balaniuk , Kenneth Salisbury - In Proc. International Symposium on Surgery Simulation and Soft Tissue Modeling , 2003
"... Abstract. This paper introduces the Radial Elements Method -REM for the simulation of deformable objects. The REM was conceived for the real time, dynamic simulation of deformable objects. The method uses a combination of static and dynamic approaches to simulate deformations and dynamics of highly ..."
Abstract - Cited by 16 (1 self) - Add to MetaCart
of highly deformable objects. The real time performance of the method and its intrinsic properties of volume conservation, modeling based in material properties and simple meshing make it particularly attractive for soft tissue modeling and surgery simulation.

Physically Based Deformable Models in Computer Graphics

by Andrew Nealen, Matthias Müller, Richard Keiser, Eddy Boxerman, Mark Carlson - EUROGRAPHICS 2005 STAR – STATE OF THE ART REPORT , 2005
"... Physically based deformable models have been widely embraced by the Computer Graphics community. Many problems outlined in a previous survey by Gibson and Mirtich [GM97] have been addressed, thereby making these models interesting and useful for both offline and real-time applications, such as motio ..."
Abstract - Cited by 164 (3 self) - Add to MetaCart
, such as motion pictures and video games. In this paper, we present the most significant contributions of the past decade, which produce such impressive and perceivably realistic animations and simulations: finite element/difference/volume methods, mass-spring systems, meshfree methods, coupled particle systems

Automated 3-D Extraction of Inner and Outer Surfaces of Cerebral Cortex from MRI

by David MacDonald, Noor Kabani, David Avis, Alan C. Evans - NEUROIMAGE , 2000
"... Automatic computer processing of large multidimensional images such as those produced by magnetic resonance imaging (MRI) is greatly aided by deformable models, which are used to extract, identify, and quantify specific neuroanatomic structures. A general method of deforming polyhedra is presented h ..."
Abstract - Cited by 181 (17 self) - Add to MetaCart
Automatic computer processing of large multidimensional images such as those produced by magnetic resonance imaging (MRI) is greatly aided by deformable models, which are used to extract, identify, and quantify specific neuroanatomic structures. A general method of deforming polyhedra is presented

Estimation of Dynamic, In Vivo Soft-Tissue Deformation: Experimental Technique and Application in a Canine Model of Tendon Injury and Repair

by unknown authors , 2010
"... ABSTRACT: Outcomes after rotator cuff surgery are typically assessedwithmeasures of strength, jointmotion, or pain, but thesemeasures do not provide a direct assessment of tissue function as healing progresses. To address this limitation, this manuscript describes biplane X-ray analysis as a techniq ..."
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technique for quantifying in vivo soft-tissue deformation. Tantalum beads were implanted in the humerus and infra-spinatus tendon in a canine model of tendon injury and repair. Biplane X-ray images were acquired during treadmill trotting and tissue deformation was estimated from the three-dimensional bead

Simulation and Animation of Deformable Bodies

by Johannes Mezger , 2008
"... The generation and visualisation of moving virtual objects is of particular concern in computer graphics. Most notably, the animation of deforming models is complex depending on mechanical properties and the variability of the geometry. Purely geometric methods are, to some extend, sufficient to com ..."
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to compute natural movements and deformations of a body. In other cases, a physics-based simulation is required. Both practices are applied to the animation of human characters, textiles, and soft bodies. Regarding character animation, we capture real movements from human actors and form a new virtual

Measuring In Vivo Animal Soft Tissue Properties for Haptic Modeling in Surgical Simulation

by Iman Brouwer, Jeffrey Ustin, Loren Bentley, Alana Sherman, Neel Dhruv, Frank Tendick - Stud Health Technol Inform , 2001
"... . To provide data for the design of virtual environments and teleoperated systems for surgery, it is necessary to measure tissue properties under both in vivo and ex vivo conditions. The former provides information about tissue behavior in its physiological state, while the latter can provide bet ..."
Abstract - Cited by 44 (1 self) - Add to MetaCart
. To provide data for the design of virtual environments and teleoperated systems for surgery, it is necessary to measure tissue properties under both in vivo and ex vivo conditions. The former provides information about tissue behavior in its physiological state, while the latter can provide

© IC-SCCE SOFT-TISSUE FLUID-STRUCTURE INTERACTIONS IN THE HUMAN BRAIN

by Michalis A. Xenos, Mahadevabharath R. Somayaji, Andreas A. Linninger
"... Fluid-structure interaction (FSI) has important applications in biomedical engineering such as invasive drug delivery in the human brain, mechanics of fluid flow in distensible blood vessels and intracranial dynamics. Intracranial dynamics concerns the study of force interactions between soft tissue ..."
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tissues and fluid flows inside the brain. Many existing fluid-structure interaction approaches such as Immersed Boundary Method and Volume of Fluid do not satisfy conservation principles: conservation of mass and momentum and do not provide accurate resolution of the interfaces. This paper presents a

Development of a Kinematic 3D Carpal Model to Analyze In Vivo Soft-Tissue Interaction Across Multiple Static Postures

by G. Elisabeta Marai, Joseph J. Crisco, David H. Laidlaw
"... Abstract — We developed a subject-specific kinematic model to analyze in vivo soft-tissue interaction in the carpus in static, unloaded postures. The bone geometry was extracted from a reference computed tomography volume image. The softtissue geometry, including cartilage and ligament tissues, was ..."
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Abstract — We developed a subject-specific kinematic model to analyze in vivo soft-tissue interaction in the carpus in static, unloaded postures. The bone geometry was extracted from a reference computed tomography volume image. The softtissue geometry, including cartilage and ligament tissues
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