Articles that mention Simon Fraser University -Optical Coherence Tomography News

Simon Fraser University

0 Comments Leave a Comment

1-15 of 81 1 2 3 4 5 6 »
1. Mentioned In 81 Articles
2. Prof Marinko Sarunic appointed as Moorfields Eye Charity Chair in Advanced Ocular Imaging
  
  Explore UCL - London's Global University Mar 31 2021 Ophthalmology
  
  ...re engineering applied to ophthalmology at UCL. Prof Marinko Sarunic will join UCL from 1 September 2021 from Simon Fraser University where he is currently Professor and Associate Director at the School of Engineering Sc...
  Read Full Article
  
  Comment
  
  Mentions: University College London Simon Fraser University
3. Optimizing 3D retinal vasculature imaging in diabetic retinopathy using registration and averaging of OCT-A
  
  Explore OSA | OSA Publishing Mar 4 2021 Ophthalmology
  
  High resolution visualization of optical coherence tomography (OCT) and OCT angiography (OCT-A) data is required to fully take advantage of the imaging modality's three-dimensional nature. However, artifacts induced by patient motion often degrade OCT-A data quality. This is especially true for patients with deteriorated focal vision, such as those with diabetic retinopathy (DR). We propose a novel methodology for software-based OCT-A motion correction achieved through serial acquisition, volumetric registration ...
  Read Full Article
  
  Comment
  
  Mentions: University of Western Australia Simon Fraser University
4. Use of the Retinal Vascular Histology to Validate an Optical Coherence Tomography Angiography Technique
  
  Explore TVST Journal Feb 2 2021 Ophthalmology
  
  Purpose: To determine the fidelity of optical coherence tomography angiography (OCTA) techniques by direct comparison of the retinal capillary network images obtained from the same region as imaged by OCTA and high-resolution confocal microscope. Method: Ten porcine eyes were perfused with red blood cells for OCTA image acquisition from the area centralis and then perfusion-fixed, and the vessels were labeled for confocal imaging. Two approaches involving post-processing of two-dimensional projection ...
  Read Full Article
  
  Comment
  
  Mentions: University of Western Australia Simon Fraser University
5. Quantitative multi-contrast in vivo mouse imaging with polarization diversity optical coherence tomography and angiography
  
  Explore OSA | OSA Publishing Nov 11 2020 Ophthalmology
  
  Retinal microvasculature and the retinal pigment epithelium (RPE) play vital roles in maintaining the health and metabolic activity of the eye. Visualization of these retina structures is essential for pre-clinical studies of vision-robbing diseases, such as age-related macular degeneration (AMD). We have developed a quantitative multi-contrast polarization diversity OCT and angiography (QMC-PD-OCTA) system for imaging and visualizing pigment in the RPE using degree of polarization uniformity (DOPU), along with flow ...
  Read Full Article
  
  Comment
  
  Mentions: University of British Columbia University of Tsukuba Simon Fraser University
6. Feasibility of combined optical coherence tomography and autofluorescence imaging for visualization of needle biopsy placement
  
  Explore SPIE Digital Library Oct 23 2020 Probes
  
  Significance: Diagnosis of suspicious lung nodules requires precise collection of relevant biopsies for histopathological analysis. Using optical coherence tomography and autofluorescence imaging (OCT-AFI) to improve diagnostic yield in parts of the lung inaccessible to larger imaging methods may allow for reducing complications related to the alternative of computed tomography-guided biopsy. Aim: Feasibility of OCT-AFI combined with a commercially available lung biopsy needle was demonstrated for visualization of needle puncture sites ...
  Read Full Article
  
  Comment
  
  Mentions: British Columbia Cancer Agency Simon Fraser University
7. Real-time retinal layer segmentation of OCT volumes with GPU accelerated inferencing using a compressed, low-latency neural network
  
  Explore OSA | OSA Publishing Oct 8 2020
  
  Segmentation of retinal layers in optical coherence tomography (OCT) is an essential step in OCT image analysis for screening, diagnosis, and assessment of retinal disease progression. Real-time segmentation together with high-speed OCT volume acquisition allows rendering of en face OCT of arbitrary retinal layers, which can be used to increase the yield rate of high-quality scans, provide real-time feedback during image-guided surgeries, and compensate aberrations in adaptive optics (AO) OCT ...
  Read Full Article
  
  Comment
  
  Mentions: Oregon Health & Science University Simon Fraser University
8. Ensemble Deep Learning for Diabetic Retinopathy Detection Using Optical Coherence Tomography Angiography
  
  Explore TVST Journal Aug 25 2020 Ophthalmology
  
  Purpose : To evaluate the role of ensemble learning techniques with deep learning in classifying diabetic retinopathy (DR) in optical coherence tomography angiography (OCTA) images and their corresponding co-registered structural images. Methods : A total of 463 volumes from 380 eyes were acquired using the 3 3-mm OCTA protocol on the Zeiss Plex Elite system. Enface images of the superficial and deep capillary plexus were exported from both the optical coherence tomography ...
  Read Full Article
  
  Comment
  
  Mentions: University of British Columbia Simon Fraser University
9. Retinal capillary perfusion heterogeneity in diabetic retinopathy detected by optical coherence tomography angiography
  
  Explore IOVS Journal Jul 27 2020 Ophthalmology
  
  Purpose : To investigate the ability of a commercially available optical coherence tomography angiography (OCTA) machine to describe retinal capillary perfusion heterogeneity in diabetic retinopathy (DR) patients. Methods : Ten consecutive en face 6x6mm foveal OCTA images were obtained from both eyes of 13 DR patients and 5 healthy controls using a Zeiss PLEX Elite 9000. Fifteen DR and eight healthy eyes met the inclusion criteria: a centered fovea, little motion artifacts ...
  Read Full Article
  
  Comment
  
  Mentions: University of British Columbia Simon Fraser University
10. Sensorless adaptive-optics optical coherence tomographic angiography
  
  Explore OSA | OSA Publishing Jul 1 2020
  
  Optical coherence tomographic angiography (OCTA) can image the retinal blood flow but visualization of the capillary caliber is limited by the low lateral resolution. Adaptive optics (AO) can be used to compensate ocular aberrations when using high numerical aperture (NA), and thus improve image resolution. However, previously reported AO-OCTA instruments were large and complex, and have a small sub-millimeter field of view (FOV) that hinders the extraction of biomarkers with ...
  Read Full Article
  
  Comment
  
  Mentions: Oregon Health & Science University Center for Ophthalmic Optics and Lasers Simon Fraser University
11. Pseudo-real-time retinal layer segmentation for high-resolution adaptive optics optical coherence tomography
  
  Explore arxiv.org Apr 17 2020 Ophthalmology
  
  We present a pseudo-real-time retinal layer segmentation for high-resolution Sensorless Adaptive Optics-Optical Coherence Tomography (SAO-OCT). Our pseudo-real-time segmentation method is based on Dijkstras algorithm that uses the intensity of pixels and the vertical gradient of the image to find the minimum cost in a geometric graph formulation within a limited search region. It segments six retinal layer boundaries in an iterative process according to their order of prominence. The segmentation ...
  Read Full Article
  
  Comment
  
  Mentions: Oregon Health & Science University Simon Fraser University
12. ADAPTIVE OPTICS OPTICAL COHERENCE TOMOGRAPHY IN A CASE OF ACUTE ZONAL OCCULT OUTER RETINOPATHY
  
  Explore LWW Online Apr 15 2020 Ophthalmology
  
  Purpose: To report a case of acute zonal occult outer retinopathy in which adaptive optics (AO) facilitated visualization of abnormal photoreceptors previously thought to be in an area of normal retina on conventional optical coherence tomography ( OCT ). Methods: Case report. Results: A 51-year-old woman presents with 11-month history of photopsias and scotoma in the temporal visual field of her left eye. Ocular imaging including fluorescein angiography, fundus autofluorescence and OCT ...
  Read Full Article
  
  Comment
  
  Mentions: University of British Columbia Tufts University Simon Fraser University
13. Cascaded Deep Neural Networks for Retinal Layer Segmentation of Optical Coherence Tomography with Fluid Presence
  
  Explore arxiv.org Dec 15 2019
  
  Optical coherence tomography (OCT) is a non-invasive imaging technology which can provide micrometer-resolution cross-sectional images of the inner structures of the eye. It is widely used for the diagnosis of ophthalmic diseases with retinal alteration, such as layer deformation and fluid accumulation. In this paper, a novel framework was proposed to segment retinal layers with fluid presence. The main contribution of this study is two folds: 1) we developed a ...
  Read Full Article
  
  Comment
  
  Mentions: Simon Fraser University
14. RETOUCH: The Retinal OCT Fluid Detection and Segmentation Benchmark and Challenge
  
  Explore IEEE Xplore Aug 1 2019 Ophthalmology
  
  Retinal swelling due to the accumulation of fluid is associated with the most vision-threatening retinal diseases. Optical coherence tomography (OCT) is the current standard of care in assessing the presence and quantity of retinal fluid and image-guided treatment management. Deep learning methods have made their impact across medical imaging, and many retinal OCT analysis methods have been proposed. However, it is currently not clear how successful they are in interpreting ...
  Read Full Article
  
  Comment
  
  Mentions: University of Central Florida Simon Fraser University Nanjing University of Science and Technology
15. Directional optical coherence tomography reveals melanin concentration-dependent scattering properties of retinal pigment epithelium
  
  Explore SPIE Digital Library Jul 6 2019 Ophthalmology
  
  Optical coherence tomography (OCT) is a powerful tool in ophthalmology that provides in vivo morphology of the retinal layers and their light scattering properties. The directional (angular) reflectivity of the retinal layers was investigated with focus on the scattering from retinal pigment epithelium (RPE). The directional scattering of the RPE was studied in three mice strains with three distinct melanin concentrations: albino (BALB/c), agouti (129S1/SvlmJ), and strongly pigmented ...
  Read Full Article
  
  Comment
  
  Mentions: Oregon Health & Science University UC Davis Simon Fraser University
16. Multi-scale and -contrast sensorless adaptive optics optical coherence tomography
  
  Explore Home May 28 2019 Ophthalmology
  
  Background: The roles of the retinal microvasculature and the retinal pigment epithelium (RPE) in maintaining the health and metabolic activity of the retina lend great clinical value to their high-resolution visualization. Methods: By integrating polarization diversity detection (PDD) into multi-scale and -contrast sensorless adaptive optics optical coherence tomography (MSC-SAO-OCT), we have developed a novel multi-contrast SAO OCT system for imaging pigment in the RPE as well as flow in the ...
  Read Full Article
  
  Comment
  
  Mentions: Oregon Health & Science University University of Tsukuba Simon Fraser University
17. 1-15 of 81 1 2 3 4 5 6 »