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Sampling and Reconstruction of Surfaces and Higher Dimensional Manifolds
Image sampling Image reconstruction Geometric approach Fat triangulation Image manifolds
2010/1/8
We present new sampling theorems for surfaces and higher dimensional manifolds. The core of the proofs resides in triangulation results for manifolds with boundary, not necessarily bounded. The method...
Sampling and reconstruction for biomedical image registration
image registration reconstruction interpolation
2009/12/23
Sampling and reconstruction for biomedical image registration.
Shape Reconstruction from Endoscopic Images.
Progressive Magnetic Resonance Image Reconstruction Based on Iterative Solution of a Sparse Linear System
Image Reconstruction Sparse Linear System
2009/9/8
Image reconstruction from nonuniformly sampled spatial frequency domain data is an important problem that arises in computed imaging. Current reconstruction techniques suffer from limitations in their...
An Approximate Cone Beam Reconstruction Algorithm for Gantry-Tilted CT Using Tangential Filtering
Gantry-Tilted CT Tangential Filtering
2009/9/8
FDK algorithm is a well-known 3D (three-dimensional) approximate algorithm for CT (computed tomography) image reconstruction and is also known to suffer from considerable artifacts when the scanning c...
Analysis of Cone-Beam Artifacts in off-Centered Circular CT for Four Reconstruction Methods
Cone-Beam Artifacts CT
2009/9/8
Cone-beam (CB) acquisition is increasingly used for truly three-dimensional X-ray computerized tomography (CT). However, tomographic reconstruction from data collected along a circular trajectory with...
Extending Three-Dimensional Weighted Cone Beam Filtered Backprojection (CB-FBP) Algorithm for Image Reconstruction in Volumetric CT at Low Helical Pitches
CB-FBP Image Reconstruction
2009/9/8
A three-dimensional (3D) weighted helical cone beam filtered backprojection (CB-FBP) algorithm (namely, original 3D weighted helical CB-FBP algorithm) has already been proposed to reconstruct images f...
We propose two variable weighted iterative reconstruction algorithms (VW-ART and VW-OS-SART) to improve the algebraic reconstruction technique (ART) and simultaneous algebraic reconstruction technique...
Improving Non-Cartesian MRI Reconstruction through Discontinuity Subtraction
Non-Cartesian MRI Discontinuity Subtraction
2009/9/8
Non-Cartesian sampling is widely used for fast magnetic resonance imaging (MRI). Accurate and fast image reconstruction from non-Cartesian k-space data becomes a challenge and gains a lot of attention...
Improved Image Fusion in PET/CT Using Hybrid Image Reconstruction and Super-Resolution
Improved Image Fusion PET/CT
2009/9/8
Purpose. To provide PET/CT image fusion with an improved PET resolution and better contrast ratios than standard reconstructions. Method. Using a super-resolution algorithm, several PET acquisitions w...
Adaptive Bayesian Iterative Transmission Reconstruction for Attenuation Correction in Myocardial Perfusion Imaging with SPECT/Slow-Rotation Low-Output CT Systems
Myocardial Perfusion Imaging SPECT/Slow-Rotation Low-Output CT Systems
2009/9/7
Objectives. SPECT/slow-rotation low-output CT systems can produce streak artifacts in filtered backprojection (FBP) attenuation maps, impacting attenuation correction (AC) in myocardial perfusion imag...
A Note on the Iterative MRI Reconstruction from Nonuniform k-Space Data
the Iterative MRI Nonuniform k-Space Data
2009/9/7
In magnetic resonance imaging (MRI), methods that use a non-Cartesian grid in k-space are becoming increasingly important. In this paper, we use a recently proposed implicit discretisation scheme whic...
A Fast Reconstruction Algorithm for Fluorescence Optical Diffusion Tomography Based on Preiteration
Fluorescence Optical Diffusion Tomography Preiteration
2009/9/7
Fluorescence optical diffusion tomography in the near-infrared (NIR) bandwidth is considered to be one of the most promising ways for noninvasive molecular-based imaging. Many reconstructive approache...
A Fast CT Reconstruction Scheme for a General Multi-Core PC
A Fast CT Reconstruction Scheme General Multi-Core PC
2009/9/7
Expensive computational cost is a severe limitation in CT reconstruction for clinical applications that need real-time feedback. A primary example is bolus-chasing computed tomography (CT) angiography...
Application of Blind Deblurring Reconstruction Technique to SPECT Imaging
SPECT Imaging Blind Deblurring Reconstruction Technique
2009/9/7
An SPECT image can be approximated as the convolution of the ground truth spatial radioactivity with the system point spread function (PSF). The PSF of an SPECT system is determined by the combined ef...