Results 1 - 10 of 2,042

Sparse MRI: The Application of Compressed Sensing for Rapid MR Imaging

by Michael Lustig, David Donoho, John M. Pauly - MAGNETIC RESONANCE IN MEDICINE 58:1182–1195 , 2007
"... The sparsity which is implicit in MR images is exploited to significantly undersample k-space. Some MR images such as angiograms are already sparse in the pixel representation; other, more complicated images have a sparse representation in some transform domain–for example, in terms of spatial finit ..."
Abstract - Cited by 538 (11 self) - Add to MetaCart
finite-differences or their wavelet coefficients. According to the recently developed mathematical theory of compressedsensing, images with a sparse representation can be recovered from randomly undersampled k-space data, provided an appropriate nonlinear recovery scheme is used. Intuitively, artifacts

A comparison of bayesian methods for haplotype reconstruction from population genotype data.

by Matthew Stephens , Peter Donnelly , Dr Matthew Stephens - Am J Hum Genet , 2003
"... In this report, we compare and contrast three previously published Bayesian methods for inferring haplotypes from genotype data in a population sample. We review the methods, emphasizing the differences between them in terms of both the models ("priors") they use and the computational str ..."
Abstract - Cited by 557 (7 self) - Add to MetaCart
In this report, we compare and contrast three previously published Bayesian methods for inferring haplotypes from genotype data in a population sample. We review the methods, emphasizing the differences between them in terms of both the models ("priors") they use and the computational

Permanent Scatterers in SAR interferometry

by Ro Ferretti, Claudio Prati, Fabio Rocca - IEEE Transactions on Geosci- ence and Remote Sensing
"... Abstract—Temporal and geometrical decorrelation often pre-vents SAR interferometry from being an operational tool for sur-face deformation monitoring and topographic profile reconstruc-tion. Moreover, atmospheric disturbances can strongly compro-mise the accuracy of the results. In this paper, we pr ..."
Abstract - Cited by 222 (10 self) - Add to MetaCart
) contributions can be estimated and removed. Examples are then shown of small motion measurements, DEM refinement, and APS estimation and removal in the case of a sliding area in Ancona, Italy. ERS data have been used. Index Terms—Differential interferometry, digital elevation model (DEM) reconstruction

Coil sensitivity encoding for fast MRI. In:

by Klaas P Pruessmann , Markus Weiger , Markus B Scheidegger , Peter Boesiger - Proceedings of the ISMRM 6th Annual Meeting, , 1998
"... New theoretical and practical concepts are presented for considerably enhancing the performance of magnetic resonance imaging (MRI) by means of arrays of multiple receiver coils. Sensitivity encoding (SENSE) is based on the fact that receiver sensitivity generally has an encoding effect complementa ..."
Abstract - Cited by 193 (3 self) - Add to MetaCart
complementary to Fourier preparation by linear field gradients. Thus, by using multiple receiver coils in parallel scan time in Fourier imaging can be considerably reduced. The problem of image reconstruction from sensitivity encoded data is formulated in a general fashion and solved for arbitrary coil

Making Faces

by Brian Guenter, et al. , 1998
"... We have created a system for capturing both the three-dimensional geometry and color and shading information for human facial expressions. We use this data to reconstruct photorealistic, 3D animations of the captured expressions. The system uses a large set of sampling points on the face to accurate ..."
Abstract - Cited by 186 (2 self) - Add to MetaCart
to accurately track the three dimensional deformations of the face. Simultaneously with the tracking of the geometric data, we capture multiple high resolution, registered video images of the face. These images are used to create a texture map sequence for a three dimensional polygonal face model which can

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
the data may have topological holes. This automatic 3-D cortex segmentation technique has been applied to 150 normal subjects, simultaneously extracting both the gray/white and gray/cerebrospinal fluid interface from each individual. The collection of surfaces has been used to create a spatial map

3D hand pose reconstruction using specialized mappings

by Vassilis Athitsos, Leonid Sigal, Stan Sclaroff - In Proc. International Conf. on Computer Vision (ICCV), Vol.1 , 2001
"... A system for recovering 3D hand pose from monocu-lar color sequences is proposed. The system employs a non-linear supervised learning framework, the specialized mappings architecture (SMA), to map image features to likely 3D hand poses. The SMA’s fundamental components are a set of specialized forwa ..."
Abstract - Cited by 90 (10 self) - Add to MetaCart
A system for recovering 3D hand pose from monocu-lar color sequences is proposed. The system employs a non-linear supervised learning framework, the specialized mappings architecture (SMA), to map image features to likely 3D hand poses. The SMA’s fundamental components are a set of specialized

A unified approach to statistical tomography using coordinate descent optimization

by Charles A. Bouman, Ken Sauer - IEEE Trans. on Image Processing , 1996
"... Abstract 1 Over the past ten years there has been considerable interest in statistically optimal reconstruction of image cross-sections from tomographic data. In particular, a variety of such algorithms have been proposed for maximum a posteriori (MAP) reconstruction from emission tomographic data. ..."
Abstract - Cited by 140 (27 self) - Add to MetaCart
Abstract 1 Over the past ten years there has been considerable interest in statistically optimal reconstruction of image cross-sections from tomographic data. In particular, a variety of such algorithms have been proposed for maximum a posteriori (MAP) reconstruction from emission tomographic data

Global, voxel, and cluster tests, by theory and permutation, for a difference between two groups of univariate analysis of ERPs/ERFs I: Review 1725 structural MR images of the brain

by Edward T. Bullmore, John Suckling, Stephan Overmeyer, Sophia Rabe-hesketh, Eric Taylor, Michael J. Brammer - IEEE Transactions on Medical Imaging , 1999
"... Abstract—We describe almost entirely automated procedures for estimation of global, voxel, and cluster-level statistics to test the null hypothesis of zero neuroanatomical difference between two groups of structural magnetic resonance imaging (MRI) data. Theoretical distributions under the null hypo ..."
Abstract - Cited by 134 (18 self) - Add to MetaCart
are illustrated by application to MRI data acquired from 18 adolescents with hyperkinetic disorder and 16 control subjects matched for age and gender. Index Terms — Brain, imaging/mapping, probability distributions, statistics.

A quasi-dense approach to surface reconstruction from uncalibrated images

by Maxime Lhuillier, Long Quan, Senior Member - Transactions on Pattern Analysis and Machine Intelligence
"... Abstract—This paper proposes a quasi-dense approach to 3D surface model acquisition from uncalibrated images. First, correspondence information and geometry are computed based on new quasi-dense point features that are resampled subpixel points from a disparity map. The quasi-dense approach gives mo ..."
Abstract - Cited by 88 (20 self) - Add to MetaCart
Abstract—This paper proposes a quasi-dense approach to 3D surface model acquisition from uncalibrated images. First, correspondence information and geometry are computed based on new quasi-dense point features that are resampled subpixel points from a disparity map. The quasi-dense approach gives
Results 1 - 10 of 2,042