Enhancement of low-dosage cine-angiographic image sequences using a modified expectation maximization algorithm

Cheuk L. Chan; Aggelos K. Katsaggelos; Alan V. Sahakian

doi:10.1117/12.131446

1 November 1992 Enhancement of low-dosage cine-angiographic image sequences using a modified expectation maximization algorithm

Cheuk L. Chan, Aggelos K. Katsaggelos, Alan V. Sahakian

Author Affiliations +

Proceedings Volume 1818, Visual Communications and Image Processing '92; (1992) https://doi.org/10.1117/12.131446
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

Clinical x-ray image sequences acquired through fluoroscopy systems may be corrupted by quantum mottle--a Poisson-distributed, signal-dependent noise that arises with a controlled x- ray dosage reduction in an attempt to lower the exposure to the patient and the medical staff. In this paper, an approach to temporally filter this sequence is presented. It relies on a joint estimation of the signal and the displacement field through a maximum likelihood approach. Implementation is done via a modified EM algorithm to facilitate a more tractable solution.

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Cheuk L. Chan, Aggelos K. Katsaggelos, and Alan V. Sahakian "Enhancement of low-dosage cine-angiographic image sequences using a modified expectation maximization algorithm", Proc. SPIE 1818, Visual Communications and Image Processing '92, (1 November 1992); https://doi.org/10.1117/12.131446

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