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Distance-driven projection and backprojection in three dimensions.
The distance-driven framework for projection and backprojection is extended to three dimensions and its application to cone beam reconstruction is demonstrated and experimental results are presented to demonstrate the computational performance, the artefact characteristics and the noise-resolution characteristics of thedistance-driven method in three dimensions. Expand
O(N2log2N) filtered backprojection reconstruction algorithm for tomography
A new fast reconstruction algorithm for parallel beam tomography is presented, and uses a hierarchical decomposition of the backprojection operation to reduce the computational cost from O(N(3)log(2 )N to O( N(2)log (2)N). Expand
Experimental flat-panel high-spatial-resolution volume CT of the temporal bone.
- Rajiv Gupta, S. Bartling, +5 authors H. Curtin
- AJNR. American journal of neuroradiology
- 1 September 2004
The flat-panel prototype provides better definition of fine osseous structures of temporal bone than that of currently available MSCT scanners, and provides impetus for further research in increasing spatial resolution beyond that offered by the current state-of-the-art scanners. Expand
CatSim: a new computer assisted tomography simulation environment
- B. De Man, S. Basu, +8 authors Eugene C. Williams
- Physics, Engineering
- SPIE Medical Imaging
- 8 March 2007
A new simulation environment for X-ray computed tomography, called CatSim, which allows simulating complex analytic phantoms, such as the FORBILD phantom, including boxes, ellipsoids, elliptical cylinders, cones, and cut planes. Expand
An N2logN back-projection algorithm for SAR image formation
- Shu Xiao, D. Munson, S. Basu, Y. Bresler
- Computer Science
- Conference Record of the Thirty-Fourth Asilomar…
- 1 December 2000
A fast algorithm for far-field SAR imaging based on a new fast back-projection algorithm developed for tomography, which has potential advantages and is applicable to the near-field scenario, taking into account wavefront curvature. Expand
Distance-driven projection and backprojection
Projection and backprojection are important processes in computed tomography (CT). They are used in iterative reconstruction, simulation, and artifact correction, as well as routine… Expand
Feasibility of tomography with unknown view angles
It is demonstrated that under mild conditions, the angle recovery problem has unique solutions and is stable with respect to perturbations in the data and the Cramer-Rao lower bounds are determined. Expand
Branchless distance driven projection and backprojection
A variation on the Distance Driven projection and backprojection method in which the inner loop is essentially branchless, and it is demonstrated that the new loop structure computes the same results as the original method to within numerical precision. Expand
Exact filtered backprojection reconstruction for dynamic pitch helical cone beam computed tomography.
It is proved that the resulting algorithm, which is functionally identical to the constant pitch case, provides exact reconstruction provided that the projection of the helix onto the detector forms convex boundaries and that PI lines are unique. Expand
Uniqueness of tomography with unknown view angles
It is proved that under some fairly mild conditions, the view angles are uniquely determined by the projection data, and conditions for the unique recovery of these view angles based on the Helgasson-Ludwig consistency conditions forThe Radon transform are presented. Expand