A5030577876- Medical Imaging Techniques and Applications
- Medical Image Segmentation Techniques
- Digital Image Processing Techniques
- Advanced X-ray and CT Imaging
- Advanced MRI Techniques and Applications
- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- Sparse and Compressive Sensing Techniques
- Computability, Logic, AI Algorithms
- Computer Graphics and Visualization Techniques
- Radiation Dose and Imaging
- Electron and X-Ray Spectroscopy Techniques
- Cellular Automata and Applications
- Image Retrieval and Classification Techniques
- Cell Image Analysis Techniques
- Advanced Optimization Algorithms Research
- Numerical methods in inverse problems
- Anatomy and Medical Technology
- Radiomics and Machine Learning in Medical Imaging
- Topological and Geometric Data Analysis
- DNA and Biological Computing
- Optimization and Variational Analysis
- semigroups and automata theory
- Evolutionary Algorithms and Applications
- 3D Shape Modeling and Analysis
New York University
2021
The Graduate Center, CUNY
2011-2020
City University of New York
2011-2020
Queens College, CUNY
2019
Medgar Evers College
2019
City College of New York
2007-2009
CUNY School of Law
2007
Center for Discrete Mathematics and Theoretical Computer Science
2006
University of Pennsylvania
1994-2005
Philadelphia University
1983-2005
Algebraic reconstruction techniques (ART) are iterative procedures for recovering objects from their projections. It is claimed that by a careful adjustment of the order in which collected data accessed during procedure and so-called relaxation parameters to be chosen an algebraic technique, ART can produce high-quality reconstructions with excellent computational efficiency. This demonstrated example based on particular (but realistic) medical imaging task, showing match performance...
A prospective sample of 69 healthy adults, age range 18-80 years, was studied with magnetic resonance imaging scans (T2 weighted, 5 mm thick) the entire cranium. Volumes were obtained by a segmentation algorithm that uses proton density and T2 pixel values to correct field inhomogeneities ("shading"). Average (+/- SD) brain volume, excluding cerebellum, 1090.91 ml 114.30; range, 822.19-1363.66), cerebrospinal fluid (CSF) volume 127.91 57.62; 34.00-297.02). Brain higher (by ml) in right...
The expectation maximization method for maximum likelihood image reconstruction in emission tomography, based on the Poisson distribution of statistically independent components and measurement vectors, is extended to a aposteriori using multivariate Gaussian priori probability vector. approach equivalent penalized estimation with special choice penalty function. applied find posteriori maximizer. A simple iterative formula derived function that weighted sum squared deviations vector from...
The author investigates how one can estimate the total attenuation, p, of a polyenergetic X-ray beam what m, monoenergetic would have been along same ray. He finds that for beams with typical diagnostic spectra passing through human body find simple function f such f(p) is sufficiently close m to allow good reconstructions. also cannot be accurately estimated from p based on assumption consists water alone. author's results are demonstrated by reconstructions mathematical model cross-section...
Extensions to a shape-based interpolation method in which pixels that share boundary edge (one inside and the other outside object) are considered be at distance between adjacent pixel centers proposed. Using such an initialization for calculations, generalization of chamfer calculation is developed. The allows simultaneous distances within object its background by two consecutive chamfering processes. performances number variants methods evaluated. It shown using near-optimal 3*3 modified...
Desirable properties of color scales are examined, and a linearized optimal scale (LOCS) is introduced. The merits for medical image data were studied, it was found that, in tests, although observers performed somewhat better with the newly developed LOCS than previously advocated heated-object scale, they significantly gray either scales. After evaluating these results, authors suggest alternate solutions that might help perform better. Nonetheless, believe can contribute to perception...
Computed tomography and the cuberiile model-an effort to better serve medical profession its patients.
Abstract The computed tomographic studies obtained routinely in the examination of patients with congenital or acquired defects skull and facial bones can be utilized as a substrate to provide an accurate three-dimensional representation osseous abnormalities. total dose x-irradiation is reduced other means radiological are eliminated. Osseous structures faithfully reproduced. Complete inspection reproduced structure made from any viewpoint, including internal inspection.
Image reconstruction from projections suffers an inherent difficulty: there are different images that have identical in any finite number of directions. However, by identifying the type image is likely to occur application area, one can design algorithms may be efficacious area even when small. One such approach uses total variation minimization. We report on algorithm based this approach, and show sometimes it produces medically-desirable reconstructions computerized tomography (CT) a small...