English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Retinal optical coherence tomography (OCT) and OCT angiography (OCTA) sufferfrom the degeneration of image quality due to speckle noise and bulk-motionnoise, respectively. Because the cross-sectional retina has distinct featuresin OCT and OCTA B-scans, existing digital filters that can denoise OCTefficiently are unable to handle the bulk-motion noise in OCTA. In this Letter,we propose a universal digital filtering approach that is capable of minimizingboth types of noise. Considering the retinal capillaries in OCTA are hard todifferentiate in B-scans while having distinct curvilinear structures in 3Dvolumes, we decompose the volumetric OCT and OCTA data with 3D shearlets thusefficiently separate the retinal tissue and vessels from the noise in thistransform domain. Compared with wavelets and curvelets, the shearlets providebetter representation of the layer edges in OCT and the vasculature in OCTA.Qualitative and quantitative results show the proposed method outperforms thestate-of-the-art OCT and OCTA denoising methods. Besides, the superiority of 3Ddenoising is demonstrated by comparing the 3D shearlet filtering with its 2Dcounterpart.

Universal digital filtering for denoising volumetric retinal OCT and OCT angiography in 3D shearlet domain