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• W2541594564 abstract "A three-dimensional maximum likelihood estimation (MLE) algorithm for single photon emission computed tomography (SPECT) image reconstruction is developed. This expectation maximization MLE algorithm is implemented using a projector-backprojector pair which approximates the two-dimensional, position-dependent blurring in SPECT. The resulting iterative algorithm is integrated with a recently developed acceleration scheme based on vector extrapolation techniques adapted to three dimensions. Using the minimal polynomial and reduced rank vector extrapolation techniques, the accelerated 3-D MLE algorithm is evaluated on patient data from a SPECT system. It is shown that the acceleration scheme results in substantial savings in computation time. >" @default.
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• W2541594564 date "2002-12-09" @default.
• W2541594564 modified "2023-10-02" @default.
• W2541594564 title "An accelerated 3D maximum likelihood SPECT image reconstruction" @default.
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• W2541594564 doi "https://doi.org/10.1109/nssmic.1991.259260" @default.
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