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- W2134904727 abstract "An arbitrary source function cannot be determined fully from projection data that are limited in number and range of viewing angle. There exists a null subspace in the Hilbert space of possible source functions about which the available projection measurements provide no information. The null-space components of deterministic solutions are usually zero, giving rise to unavoidable artifacts. It is demonstrated that these artifacts may be reduced by a Bayesian maximum a posteriori (MAP) reconstruction method that permits the use of significant a priori information. Since normal distributions are assumed for the a priori and measurement-error probability densities, the MAP reconstruction method presented here is equivalent to the minimum-variance linear estimator with nonstationary mean and covariance ensemble characterizations. A more comprehensive Bayesian approach is suggested in which the ensemble mean and covariance specifications are adjusted on the basis of the measurements." @default.
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- W2134904727 date "1983-11-01" @default.
- W2134904727 modified "2023-09-23" @default.
- W2134904727 title "Bayesian approach to limited-angle reconstruction in computed tomography" @default.
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- W2134904727 doi "https://doi.org/10.1364/josa.73.001501" @default.
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