Results 1 - 10 of 90,508

A Deformable Surface Model for Vascular Segmentation

by Max W. K. Law, Albert C. S. Chung
"... Abstract. Inspired by the motion of a solid surface under liquid pressure, this paper proposes a novel deformable surface model to segment blood vessels in medical images. In the proposed model, the segmented region and the background region are respectively considered as liquid and an elastic solid ..."
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Abstract. Inspired by the motion of a solid surface under liquid pressure, this paper proposes a novel deformable surface model to segment blood vessels in medical images. In the proposed model, the segmented region and the background region are respectively considered as liquid and an elastic

Knowledge-Based Deformable Surface Model with Application to Segmentation

by Amir Ghanei , Hamid Soltanian-Zadeh , Kost Elisevich , Jeffrey A Fessler - of Brain Structures in MRI,” SPIE , 2001
"... ABSTRACT We have developed a knowledge-based deformable surface for segmentation of medical images. This work has been done in the context of segmentation of hippocampus from brain MRI, due to its challenge and clinical importance. The model has a polyhedral discrete structure and is initialized au ..."
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ABSTRACT We have developed a knowledge-based deformable surface for segmentation of medical images. This work has been done in the context of segmentation of hippocampus from brain MRI, due to its challenge and clinical importance. The model has a polyhedral discrete structure and is initialized

On Validating a Physically-Based Deformable Surface Model

by unknown authors
"... Abstract. Preliminary results on the analysis of a physically-based model are presented. Over the past two decades several approaches to modeling flexible and soft surfaces, such as cloth, rubber, piece of paper, and a metal plate, have been proposed in order to enhance the realism of the computer-s ..."
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-synthesized scenes. The model for which the parameters have geometric semantics is the one proposed by Terzopoulos et al.[4]. Their model relates the Lagrangian motion equation to the metric and curvature tensors of the deforming surface. Once the metric tensors measure the variation of the area of the deforming

A DEFORMABLE SURFACE MODEL FOR SOFT VOLUME SIMULATION

by Sylvester Arnab, Vinesh Raja
"... This paper introduces a surface alternative to the volume model commonly employed in soft object simulation. This is inspired by a significant interest in employing the surface data due to its simplicity. However, there are issues in properties estimation and volume preservation. Therefore, the aim ..."
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of the ongoing research includes exploring the potential of a surface mass spring model with shape-preserving springs for volume simulation. The approach illustrates the possibility of deriving the spring stiffness at runtime based on the real material properties as well as achieving a global shape deformation

Bayesian Estimation Of Regularization Parameters For Deformable Surface Models

by Gregory S. Cunningham, Andre Lehovich, Kenneth M. Hanson , 1999
"... In this article we build on our past attempts to reconstruct a 3D, time-varying bolus of radiotracer from first-pass data obtained by the dynamic SPECT imager, FASTSPECT, built by the University of Arizona. The object imaged is a CardioWest total artificial heart. The bolus is entirely contained in ..."
Abstract - Cited by 2 (1 self) - Add to MetaCart
in one ventricle and its associated inlet and outlet tubes. The model for the radiotracer distribution at a given time is a closed surface parameterized by 482 vertices that are connected to make 960 triangles, with nonuniform intensity variations of radiotracer allowed inside the surface on a voxel

Automated medical image segmentation using a new deformable surface model

by Suhuai Luo - International Journal of Computer Science and Network Security , 2006
"... This paper introduces an automated medical image segmentation algorithm which can be used to locate volumetric objects such as brain tumor in Magnetic Resonance Imaging (MRI) images. The algorithm is novel in that it deals with MRI slices (or images) as a three dimension (3D) object as a whole. All ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
the processes of segmentation are done in 3D space. First, it removes noisy voxels with 3D nonlinear anisotropic filtering. The filtering well preserves the intensity distribution continuity in all three directions as well as smoothes noisy voxels. Second, it uses a novel deformable surface model to segment

On Validating a Physically-Based Deformable Surface Model

by unknown authors
"... Abstract. Preliminary results on the analysis of a physically-based model are presented. ..."
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Abstract. Preliminary results on the analysis of a physically-based model are presented.

Bayesian estimation of regularization parameters for deformable surface models

by Gregory S. Cunningham A, Andre Lehovich B, Kenneth M. Hanson A
"... In this article we build on our past attempts to reconstruct a 3D, time-varying bolus of radiotracer from first-pass data obtained by the dynamic SPECT imager, FASTSPECT, built by the University of Arizona. The object imaged is a CardioWest total artificial heart. The bolus is entirely contained in ..."
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in one ventricle and its associated inlet and outlet tubes. The model for the radiotracer distribution at a given time is a closed surface parameterized by 482 vertices that are connected to make 960 triangles, with nonuniform intensity variations of radiotracer allowed inside the surface on a voxel

Using a Deformable Surface Model to Obtain a Shape Representation of the Cortex

by Chris Davatzikos, R. Nick Bryan - IEEE Trans. Med. Imag , 1996
"... The problem of obtaining a mathematical representation of the cortex of the human brain is examined. A parametrization of the outer cortex is first obtained using a deformable surface algorithm which, motivated by the structure of the cortex, is constructed to find the central layer of thick surface ..."
Abstract - Cited by 106 (12 self) - Add to MetaCart
The problem of obtaining a mathematical representation of the cortex of the human brain is examined. A parametrization of the outer cortex is first obtained using a deformable surface algorithm which, motivated by the structure of the cortex, is constructed to find the central layer of thick

Free-form deformation of solid geometric models

by Thomas W. Sederberg, Scott R. Parry - IN PROC. SIGGRAPH 86 , 1986
"... A technique is presented for deforming solid geometric models in a free-form manner. The technique can be used with any solid modeling system, such as CSG or B-rep. It can deform surface primitives of any type or degree: planes, quadrics, parametric surface patches, or implicitly defined surfaces, f ..."
Abstract - Cited by 701 (1 self) - Add to MetaCart
A technique is presented for deforming solid geometric models in a free-form manner. The technique can be used with any solid modeling system, such as CSG or B-rep. It can deform surface primitives of any type or degree: planes, quadrics, parametric surface patches, or implicitly defined surfaces
Results 1 - 10 of 90,508