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- Charles L. Byrne
- IEEE Trans. Image Processing
- 1993

The related problems of minimizing the functionals F(x)=alphaKL(y,Px)+(1-alpha)KL(p,x) and G(x)=alphaKL(Px,y)+(1-alpha)KL(x,p), respectively, over the set of vectors x=/>0 are considered. KL(a, b) isâ€¦ (More)

- Charles L. Byrne
- IEEE Trans. Image Processing
- 1997

It has been shown that convergence to a solution can be significantly accelerated for a number of iterative image reconstruction algorithms, including simultaneous Cimmino-type algorithms, theâ€¦ (More)

- Charles L. Byrne
- IEEE Trans. Image Processing
- 1996

The simultaneous MART algorithm (SMART) and the expectation maximization method for likelihood maximization (EMML) are extended to block-iterative versions, BI-SMART and BI-EMML, that converge to aâ€¦ (More)

Accelerating the EMML algorithm and related iterative algorithms by rescaled block-iterative methods

- Charles L. Byrne
- IEEE Trans. Image Processing
- 1998

Analysis of convergence of the algebraic reconstruction technique (ART) shows it to be predisposed to converge to a solution faster than simultaneous methods, such as those of the Cimmino-Landweberâ€¦ (More)

The convex feasibility problem (CFP) is to find a member of the intersection of finitely many closed convex sets in Euclidean space. When the intersection is empty, one can minimize a proximityâ€¦ (More)

- Edward J. Soares, Charles L. Byrne, Stephen J. Glick
- IEEE Transactions on Medical Imaging
- 2000

Researchers have shown increasing interest in block-iterative image reconstruction algorithms due to the computational and modeling advantages they provide. Although their convergence properties haveâ€¦ (More)

- Charles L. Byrne
- IEEE Transactions on Medical Imaging
- 2001

The maximum a posteriori (MAP) Bayesian iterative algorithm using priors that are gamma distributed, due to Lange, Bahn and Little, is extended to include parameter choices that fall outside theâ€¦ (More)

- Stephen J. Glick, B. C. Penney, Michael A. King, Charles L. Byrne
- IEEE Trans. Med. Imaging
- 1994

A filtering approach is described, which accurately compensates for the 2D distance-dependent detector response, as well as for photon attenuation in a uniform attenuating medium. The filteringâ€¦ (More)

- Charles L. Byrne
- 1993

- Stephen J. Glick, W. G. Hawkins, Michael A. King, B. C. Penney, Edward J. Soares, Charles L. Byrne
- Medical physics
- 1992

The application of stationary restoration techniques to SPECT images assumes that the modulation transfer function (MTF) of the imaging system is shift invariant. It was hypothesized that usingâ€¦ (More)