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New Optical Coherence Tomography Findings from University of California Outlined (Speckle reduction in optical coherence tomography images based on...

July 18, 2014



New Optical Coherence Tomography Findings from University of California Outlined (Speckle reduction in optical coherence tomography images based on wave atoms)

By a News Reporter-Staff News Editor at Health & Medicine Week -- A new study on Optical Coherence Tomography is now available. According to news reporting out of Chengdu, People's Republic of China, by NewsRx editors, research stated, "Optical coherence tomography (OCT) is an emerging noninvasive imaging technique, which is based on low-coherence interferometry. OCT images suffer from speckle noise, which reduces image contrast."

Our news journalists obtained a quote from the research from the University of California, "A shrinkage filter based on wave atoms transform is proposed for speckle reduction in OCT images. Wave atoms transform is a new multiscale geometric analysis tool that offers sparser expansion and better representation for images containing oscillatory patterns and textures than other traditional transforms, such as wavelet and curvelet transforms. Cycle spinning-based technology is introduced to avoid visual artifacts, such as Gibbs-like phenomenon, and to develop a translation invariant wave atoms denoising scheme. The speckle suppression degree in the denoised images is controlled by an adjustable parameter that determines the threshold in the wave atoms domain. The experimental results show that the proposed method can effectively remove the speckle noise and improve the OCT image quality."

According to the news editors, the research concluded: "The signal-to-noise ratio, contrast-to-noise ratio, average equivalent number of looks, and cross-correlation (XCOR) values are obtained, and the results are also compared with the wavelet and curvelet thresholding techniques."

For more information on this research see: Speckle reduction in optical coherence tomography images based on wave atoms. Journal of Biomedical Optics, 2014;19(5):056009 (see also Optical Coherence Tomography).

Our news journalists report that additional information may be obtained by contacting Y. Du, University of California, Beckman Laser Institute, 1002 Health Sciences Road East, Irvine, California 92612bSichuan University, Dept. of Opto-Electronics, No24 South Section 1st, Yihuan Road, Chengdu 610065, People's Republic of China. Additional authors for this research include G. Liu, G. Feng and Z. Chen.

Keywords for this news article include: Asia, Chengdu, Imaging Technology, People's Republic of China, Optical Coherence Tomography.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Health & Medicine Week


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