Attenuation of stripe artifacts in optical coherence tomography images through wavelet-FFT filtering
نویسندگان
چکیده
منابع مشابه
Artifacts in optical coherence tomography.
Optical coherence tomography (OCT) is now an integral part of management for numerous retinal diseases for diagnosis, treatment planning and follow up. OCT interpretation must involve the understanding of the associated artifacts. These artifacts can mislead physicians to wrong diagnosis or inappropriate management. This review article discusses the various types of artifacts in OCT scans obtai...
متن کاملImage Artifacts in Optical Coherence Tomography Angiography.
PURPOSE To describe image artifacts of optical coherence tomography (OCT) angiography and their underlying causative mechanisms. To establish a common vocabulary for the artifacts observed. METHODS The methods by which OCT angiography images are acquired, generated, and displayed are reviewed as are the mechanisms by which each or all of these methods can produce extraneous image information....
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Introduction One of the most important pre-processing steps in optical coherence tomography (OCT) is reducing speckle noise, resulting from multiple scattering of tissues, which degrades the quality of OCT images. Materials and Methods The present study focused on speckle noise reduction and edge detection techniques. Statistical filters with different masks and noise variances were applied on ...
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Assessment of the peripapillary nerve fiber layer and macular thickness can be determined in ophthalmology using optical coherence tomography (OCT). Decreased nerve fiber layer thickness and macular ganglion cell thickness in optic nerve ischemia have been correlated with visual field loss. OCT allows deep optic nerve head evaluation which helps understand pathophysiology of diseases. Furtherm...
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Case 1 A 51-year-old diabetic visited us for diabetic retinopathy screening. Left eye fundus examination was limited due to asteroid hyalosis (AH) [Fig. 1a]. Optical coherence tomography (OCT) of left eye demonstrated asteroid bodies with posterior vitreous detachment (PVD) [Fig. 1b]. Left eye OCTA revealed multiple black areas in all slabs resembling capillary drop out areas [Fig. 1c-e]. The b...
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ژورنال
عنوان ژورنال: Biomedical Optics Express
سال: 2019
ISSN: 2156-7085,2156-7085
DOI: 10.1364/boe.10.004179