Image reconstruction via the finite Hilbert transform of the derivative of the backprojection.
@article{Zeng2007ImageRV,
title={Image reconstruction via the finite Hilbert transform of the derivative of the backprojection.},
author={Gengsheng Lawrence Zeng},
journal={Medical physics},
year={2007},
volume={34 7},
pages={
2837-43
}
}An exact analytical image reconstruction method is presented for two-dimensional imaging. The method performs backprojection, the derivative and finite Hilbert transforms. This method can be applied to many imaging geometries. The backprojection procedure is imaging-geometry dependent, while the differentiation and the finite Hilbert transform procedures are identical for all imaging geometries. This algorithm is applicable to list-mode data in nuclear medicine, while other filtered…
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References
SHOWING 1-10 OF 24 REFERENCES
A two-step Hilbert transform method for 2D image reconstruction.
- MathematicsPhysics in medicine and biology
- 2004
A simulation is presented of a wide patient whose projections are truncated laterally yet for which highly accurate ROI reconstruction is obtained and that shows the capability to correctly handle truncated projections.
Comparison between an image reconstruction method of filtering backprojection and the filtered backprojection method.
- Mathematics, EngineeringApplied optics
- 1988
An image reconstruction method of filtering backprojection is compared with the filtered back projection method for cases with and without Poisson (signal-dependent) noise in the projection data, revealing the noise sensitivity of the two methods.
The Fourier reconstruction of a head section
- Physics
- 1974
The authors compare the Fourier algorithm and a search algorithm using a simulated phantom to speed the search algorithm by using fewer interactions leaves decreased resolution in the region just inside the skull which could mask a subdural hematoma.
Image Reconstruction From Projections
- Mathematics, Computer ScienceReal Time Imaging
- 1995
The article addresses the design, implementation, evaluation, and application of computer algorithms for solving the reconstruction problem in various biomedical areas and emphasizes the essential role of computers.
Exact image reconstruction on PI-lines from minimum data in helical cone-beam CT.
- Computer SciencePhysics in medicine and biology
- 2004
The proposed approach and algorithm can naturally address the long object problem as well as the super-short scan problem and provide the opportunity to reconstruct images within any selected region of interest from minimum data, allowing the use of detector with a reduced size, the selection of a minimum number of rotation angles and thus the reduction of radiation dose delivered to the imaged subject.
A backprojection filtering algorithm for a spatially varying focal length collimator
- Physics, MedicineIEEE Trans. Medical Imaging
- 1994
A spatially varying focal length fan-beam collimator has been proposed to eliminate the truncation problem and to maintain good sensitivity for the organ of interest and a backprojection filtering reconstruction algorithm is derived.
Fan-beam reconstruction algorithm for a spatially varying focal length collimator
- PhysicsIEEE Trans. Medical Imaging
- 1993
Computer simulations showed that if the focal length function is smooth, the reconstructions are free of artifacts, and a reconstruction algorithm for this type of fan-beam collimation, expressed as an infinite series of convolutions followed by one backprojection, is presented.
Explicit finite inverse Hilbert transforms
- Mathematics
- 2006
Recently, Noo and coworkers discovered an explicit inversion formula for the finite Hilbert transform, which is very important to accurate reconstruction from truncated projections. This letter…




