Results 231 to 240 of about 440,016 (278)

Statistical shape and appearance models of bones

Bone, 2014
When applied to bones, statistical shape models (SSM) and statistical appearance models (SAM) respectively describe the mean shape and mean density distribution of bones within a certain population as well as the main modes of variations of shape and density distribution from their mean values.
Harrie Weinans, Amir A Zadpoor
exaly   +3 more sources

Independent component analysis in statistical shape models

SPIE Proceedings, 2003
Statistical shape models generally use Principal Component Analysis (PCA) to describe the main directions of shape variation in a training set of example shapes. However, PCA assumes a number of restrictions on the data that do not always hold. In this paper we explore the use of an alternative shape decomposition, Independent Component Analysis (ICA),
Mehmet Üzümcü, Alejandro F. Frangi, Johan H. C. Reiber, Boudewijn P. F. Lelieveldt   +3 more
openaire   +2 more sources

Automatic Construction of Biventricular Statistical Shape Models

, 2003
This paper presents a method for the generation of landmarks in three-dimensional shapes and the construction of the corresponding 3-D statistical shape models. The technique relies on establishing shape correspondances via a volumetric non-rigid registration technique using multi-resolution B-spline deformations. This approach presents some advantages
Alejandro F. Frangi, Daniel Rueckert, Julia A. Schnabel, Wiro J. Niessen   +3 more
core   +4 more sources

Multi-resolution Statistical Shape Models for Multi-organ Shape Modelling

, 2020
Statistical shape models (SSMs) are widely used in medical image segmentation. However, traditional SSM methods suffer from the High-Dimension-Low-Sample-Size (HDLSS) problem in modelling. In this work, we extend the state-of-the-art multi-resolution SSM approach from two dimension (2D) to three dimension (3D) and from single organ to multiple organs ...
Zhonghua Chen, Tapani Ristaniemi, Fengyu Cong, Hongkai Wang 0002   +3 more
openaire   +3 more sources

Articulated Statistical Shape Models of the Spine

, 2014
The spine is a complex assembly of rigid vertebrae surrounded by various soft tissues (ligaments, spinal cord, intervertebral discs, etc.). Its motion for a given individual and its shape variations across a population are greatly influenced by this fact.
Jonathan Boisvert, Boisvert, Jonathan
openaire   +3 more sources

Evaluation of the Midface by Statistical Shape Modeling

Journal of Oral and Maxillofacial Surgery, 2021
The aim of this investigation was to generate a statistical shape model (SSM) of the midface and evaluate symmetry, gender aspects, and bone thickness.About 102 computed tomography scans were analyzed to create the SSM. This included segmentation, landmark attribution, and Procrustes and principal component analysis.
Thomas, Hierl, Hans-Martin, Doerfler, Heike, Huempfner-Hierl, Daniel, Kruber   +3 more
openaire   +2 more sources

Statistical Shape and Appearance Models in Osteoporosis

Current Osteoporosis Reports, 2014
Statistical models (SMs) of shape (SSM) and appearance (SAM) have been acquiring popularity in medical image analysis since they were introduced in the early 1990s. They have been primarily used for segmentation, but they are also a powerful tool for 3D reconstruction and classification. All these tasks may be required in the osteoporosis domain, where
Castro-Mateos, Isaac, Pozo, Jose M., Cootes, Timothy F.; id_orcid 0000-0002-2695-9063, Wilkinson, J. Mark, Eastell, Richard, Frangi, Alejandro F.; id_orcid 0000-0002-2675-528X   +5 more
openaire   +2 more sources

Building 3-D Statistical Shape Models by Direct Optimization

IEEE Transactions on Medical Imaging, 2010
Statistical shape models are powerful tools for image interpretation and shape analysis. A simple, yet effective, way of building such models is to capture the statistics of sampled point coordinates over a training set of example shapes.
T F Cootes, C J Taylor, Carole J Twining   +2 more
exaly   +2 more sources

Evaluation of a Statistical Shape Model for the Liver

2018 International Conference on Image and Vision Computing New Zealand (IVCNZ), 2018
A statistical shape model (SSM)for the liver has been proposed recently which is based on a cubic Hermite mesh with a small number of elements. By fitting to the data cloud of a liver surface, such a mesh is capable of capturing the complex liver shape with fine details.
Zhihui Lu 0004, Akinobu Shimizu, Harvey Ho   +2 more
openaire   +1 more source

Statistical shape models of plant leaves

2013 IEEE International Conference on Image Processing, 2013
The shapes of plant leaves are of great importance to plant biologists and botanists, as they can help in distinguishing plant species, measuring their health, analyzing their growth patterns, and understanding relations between various species. We propose a statistical model that uses the Squared Root Velocity Function representation and a Riemannian ...
Hamid Laga, Sebastian Kurtek, Anuj Srivastava, Stanley J. Miklavcic   +3 more
openaire   +1 more source