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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 6 — Jun. 1, 2014
  • pp: 1273–1283

Gabor-based anisotropic diffusion for speckle noise reduction in medical ultrasonography

Qi Zhang, Hong Han, Chunhong Ji, Jinhua Yu, Yuanyuan Wang, and Wenping Wang  »View Author Affiliations


JOSA A, Vol. 31, Issue 6, pp. 1273-1283 (2014)
http://dx.doi.org/10.1364/JOSAA.31.001273


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Abstract

In ultrasound (US), optical coherence tomography, synthetic aperture radar, and other coherent imaging systems, images are corrupted by multiplicative speckle noise that obscures image interpretation. An anisotropic diffusion (AD) method based on the Gabor transform, named Gabor-based anisotropic diffusion (GAD), is presented to suppress speckle in medical ultrasonography. First, an edge detector using the Gabor transform is proposed to capture directionality of tissue edges and discriminate edges from noise. Then the edge detector is embedded into the partial differential equation of AD to guide the diffusion process and iteratively denoise images. To enhance GAD’s adaptability, parameters controlling diffusion are determined from a fully formed speckle region that is automatically detected. We evaluate the GAD on synthetic US images simulated with three models and clinical images acquired in vivo. Compared with seven existing speckle reduction methods, the GAD is superior to other methods in terms of noise reduction and detail preservation.

© 2014 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(100.2000) Image processing : Digital image processing
(100.2980) Image processing : Image enhancement
(110.4280) Imaging systems : Noise in imaging systems
(110.7170) Imaging systems : Ultrasound

ToC Category:
Image Processing

History
Original Manuscript: January 29, 2014
Revised Manuscript: March 26, 2014
Manuscript Accepted: April 18, 2014
Published: May 20, 2014

Citation
Qi Zhang, Hong Han, Chunhong Ji, Jinhua Yu, Yuanyuan Wang, and Wenping Wang, "Gabor-based anisotropic diffusion for speckle noise reduction in medical ultrasonography," J. Opt. Soc. Am. A 31, 1273-1283 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-6-1273


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