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Hexagonal filters for ultrasound images

[+] Author Affiliations
Sonia H. Contreras-Ortiz

Universidad Tecnológica de Bolívar, Electronic Engineering Program, Parque Industrial y Tecnológico Carlos Vélez Pombo, Km 1 Vía Turbaco, Cartagena de Indias, 130010, Colombia

Martin D. Fox

University of Connecticut, Biomedical Engineering Program, 260 Glenbrook Road, Storrs, Connecticut 06269-2247, United States

J. Electron. Imaging. 23(4), 043022 (Aug 19, 2014). doi:10.1117/1.JEI.23.4.043022
History: Received February 7, 2014; Revised June 27, 2014; Accepted July 21, 2014
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Abstract.  Most of the devices for acquisition and display of medical images use rectangular lattices even though there are other sampling strategies that can be more efficient in terms of resolution. This paper proposes an approach for ultrasound image enhancement that uses a hexagonal sampling scheme to display and process the images. The images were resampled on an interlaced grid. Interlaced sampling uses square pixels shifted half a pixel on alternate rows. Two types of hexagonal filters were designed and tested on ultrasound images: a statistical adaptive filter and an anisotropic diffusion filter. Results show improvements in signal-to-noise ratio and more natural representation of curved structures.

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Citation

Sonia H. Contreras-Ortiz and Martin D. Fox
"Hexagonal filters for ultrasound images", J. Electron. Imaging. 23(4), 043022 (Aug 19, 2014). ; http://dx.doi.org/10.1117/1.JEI.23.4.043022


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