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Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction

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Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction

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dc.contributor.author Zhang, Fan
dc.contributor.author Yoo, Yang Mo
dc.contributor.author Koh, Liang Mong
dc.contributor.author Kim, Yong Min
dc.date.accessioned 2010-08-20T06:54:43Z
dc.date.available 2010-08-20T06:54:43Z
dc.date.copyright 2007
dc.date.issued 2010-08-20T06:54:43Z
dc.identifier.citation Zhang, F., Yoo, Y. M., Koh, L. M. & Kim, Y. M. (2007). Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction. IEEE Transactions on Medical Imaging, 26(2), 200-211.
dc.identifier.issn 0278-0062
dc.identifier.uri http://hdl.handle.net/10220/6337
dc.description.abstract A new speckle reduction method, i.e., Laplacian pyramid-based nonlinear diffusion (LPND), is proposed for medical ultrasound imaging. With this method, speckle is removed by nonlinear diffusion filtering of bandpass ultrasound images in Laplacian pyramid domain. For nonlinear diffusion in each pyramid layer, a gradient threshold is automatically determined by a variation of median absolute deviation (MAD) estimator. The performance of the proposed LPND method has been compared with that of other speckle reduction methods, including the recently proposed speckle reducing anisotropic diffusion (SRAD) and nonlinear coherent diffusion (NCD). In simulation and phantom studies, an average gain of 1.55 dB and 1.34 dB in contrast-to-noise ratio was obtained compared to SRAD and NCD, respectively. The visual comparison of despeckled in vivo ultrasound images from liver and carotid artery shows that the proposed LPND method could effectively preserve edges and detailed structures while thoroughly suppressing speckle. These preliminary results indicate that the proposed speckle reduction method could improve image quality and the visibility of small structures and fine details in medical ultrasound imaging.
dc.format.extent 12 p.
dc.language.iso en
dc.relation.ispartofseries IEEE transactions on medical imaging
dc.rights © 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
dc.subject DRNTU::Engineering::Electrical and electronic engineering::Electronic systems::Signal processing.
dc.title Nonlinear diffusion in Laplacian pyramid domain for ultrasonic speckle reduction
dc.type Journal Article
dc.contributor.school School of Electrical and Electronic Engineering
dc.identifier.doi http://dx.doi.org/10.1109/TMI.2006.889735
dc.description.version Published version

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