A reduced complexity estimation algorithm for ultrasound images de-blurring

Authors:
Alessandro Palladini;Nicola Testoni;Luca De Marchi;Nicolò Speciale
Affiliations:
ARCES/DEIS - University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;ARCES/DEIS - University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;ARCES/DEIS - University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy;ARCES/DEIS - University of Bologna, Viale Risorgimento 2, 40136 Bologna, Italy
Venue:
Computer Methods and Programs in Biomedicine
Year:
2009

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Abstract

In this paper we propose a deconvolution technique for ultrasound images based on a Maximum Likelihood (ML) estimation procedure. In our approach the ultrasonic radio-frequency (RF) signal is considered as a sequence affected by Intersymbol Interference (ISI) and AWG noise. In order to reduce the computational cost, the estimation is performed with a reduced-state Viterbi algorithm. The channel effect is estimated in two different ways: either measuring the transducer response with an experimental setting or with blind homomorphic techniques. We observed an enhancement in image quality with respect to different metrics. Extensive tests were made to estimate the quantization alphabet that gives the best performances.