Filters








9 Hits in 11.0 sec

Preface

Li-Gang Liu, Kai Xu
2017 Journal of Computer Science and Technology  
cribrosa ("Automatic Anterior Lamina Cribrosa Surface Depth Measurement Based on Active Contour and Energy Constraint"), and vessel classification ("Supervised Vessels Classification Based on Feature  ...  They are about surgical cutting simulation ("Stable Real-Time Surgical Cutting Simulation of Deformable Objects Embedded with Arbitrary Triangular Meshes"), surface depth measurement of anterior lamina  ... 
doi:10.1007/s11390-017-1788-x fatcat:bhpcjfckprfa3jqugsvooakbwe

Automatic Segmentation of the Optic Nerve Head Region in Optical Coherence Tomography: A Methodological Review [article]

Rita Marques, Danilo Andrade De Jesus, João Barbosa Breda, Jan Van Eijgen, Ingeborg Stalmans, Theo van Walsum and Stefan Klein and Pedro G. Vaz and Luisa Sánchez Brea
2021 arXiv   pre-print
The advent of optical coherence tomography (OCT) has enabled the evaluation of novel optic nerve head parameters, namely the depth and curvature of the lamina cribrosa (LC).  ...  The results show that deep learning-based algorithms provide the highest accuracy, sensitivity and specificity for segmenting the different structures of the ONH including the LC.  ...  Active contours In active contours methods, an object is segmented by an energy-minimizing contour guided by the surrounding pixels.  ... 
arXiv:2109.02322v1 fatcat:rvfqfobnlbgj7agpm3axl6hule

Automated segmentation of the lamina cribrosa using Frangi's filter: a novel approach for rapid identification of tissue volume fraction and beam orientation in a trabeculated structure in the eye

I. C. Campbell, B. Coudrillier, J. Mensah, R. L. Abel, C. R. Ethier
2015 Journal of the Royal Society Interface  
The lamina cribrosa (LC) is a tissue in the posterior eye with a complex trabecular microstructure.  ...  We then apply a modified version of Frangi's vesselness filter to automatically segment the connective tissue beams of the LC and determine the orientation of each beam.  ...  The authors gratefully acknowledge Jonathan Suever for helpful discussions on computational efficiency optimizations. Funding statement.  ... 
doi:10.1098/rsif.2014.1009 pmid:25589572 pmcid:PMC4345471 fatcat:36xafwii2ndvljs7le47zjirxm

Retinal Imaging and Image Analysis

Michael D. Abramoff, Mona K. Garvin, Milan Sonka
2010 IEEE Reviews in Biomedical Engineering  
derangements, as well as to OCT-based analysis of ONH morphology and shape.  ...  Thus, on the one hand, the retina is vulnerable to organ-specific and systemic diseases, while on the other hand, imaging the retina allows diseases of the eye proper, as well as complications of diabetes  ...  When conducting multidisciplinary research like the one reviewed in this paper, many colleagues contribute to the work reported and to the way how material is presented.  ... 
doi:10.1109/rbme.2010.2084567 pmid:22275207 pmcid:PMC3131209 fatcat:5tnyvgeujfhovkwlmasuf7huja

The quantification of the visual field in computer-assisted threshold perimetry [chapter]

J. M. Wild, J. M. Wood, M. K. Hussey, S. J. Crews
1987 Seventh International Visual Field Symposium, Amsterdam, September 1986  
They also wish to thank Amy Travis and Andy Lee for their work in recruiting and examining subjects, John Lynn, III, in planning, programming and processing the data, and Gordon Stark in preparing the  ...  Fankhauser for his support and Dr A.  ...  than for the horizontal poles of the Lamina cribrosa If the bulbus wall tension is increased, those parts of the Lamina cribrosa with the least support by connective tissue would also show the least resistance  ... 
doi:10.1007/978-94-009-3325-5_26 fatcat:e6ffftom5ngchh65vmckbi36p4

Neuroanatomy and function in two visual systems

Bruce Bridgeman
2000 Behavioral and Brain Sciences  
As the axons of the ganglion cells exit the eye, they may become myelinated after reaching the lamina cribrosa 32 . Prince did not further describe this feature.  ...  This hydronium crystal has a minimum activation energy of approximately two electron-volts. This minimum activation energy has a profound impact on the performance of the L-channel.  ... 
doi:10.1017/s0140525x00253363 fatcat:szcfmb6quvhljglilyky3ttpv4

New approaches in the virtual reconstruction of fragmented specimen

Sascha Senck
2012 unpublished
The focus is on the quantitavive description of accuracies and uncertainties in fossil reconstructions using landmarks and semilandmarks from different reference samples.  ...  fossil crania and the geometrical reconstruction of missing data.  ...  The missing area incorporates the medial part of the left cerebral fossa, the clivus, the anterior and posterior clinoid processes, parts of the dorsum sellae, the ala minor, the lamina cribrosa, and the  ... 
doi:10.25365/thesis.23681 fatcat:hjgtwjnfhfegho2mb6x7zguinu

Methods to extract and quantify retinal blood vessels and optic nerve head from optical coherence tomography data in neurological disorders [article]

Ella Maria Kadas, Universitätsbibliothek Der FU Berlin, Universitätsbibliothek Der FU Berlin
2016
The focus of this thesis lies on the development of segmentation and analysis methods to quantify two major components of the retina in confocal scanning laser ophthalmoscopy (cSLO data - 2D image) and  ...  OCT non-invasively acquires in micrometer-resolution, three- dimensional (3D), cross-sectional images of biological tissues in vivo, producing in-depth views of the retina.  ...  The construction is based on choosing a function that minimizes an integral that represents the bending energy of the resulting surface.  ... 
doi:10.17169/refubium-14511 fatcat:vy7y4ppzzvhetdliod2ziaqcxy

Investigation of electrical stimulation of the optic nerve for artificial vision

Vivien Gaillet
2021
We then focused on the development of new and improved algorithms to analyze the cortical activation patterns.  ...  We first developed a support machine vector (SVM)-based classifier that allowed us to accurately identify both the visual stimulus or the stimulating electrode that elicited a given cortical activation  ...  objects on the retina when necessary 3 .  ... 
doi:10.5075/epfl-thesis-8379 fatcat:wohihwreqfhq5b6ijzk3jknmey