نتایج جستجو برای: optic disk

تعداد نتایج: 97686  

2009
T. P. Karnowski D. Aykac E. Chaum L. Giancardo Y. Li K. W. Tobin M. D. Abramoff

The detection of the optic nerve in retina images is a key element of detecting the anatomical structure of the retina. In this work we report on the fusion of two complementary optic nerve detection methods. The methods are complementary in the sense that they use different fundamental queues for locating the optic nerve. By fusing the methods through applying simple distance-based threshold, ...

In this paper, a new unsupervised algorithm for automatic retinal blood vessel extraction is presented. A pre-processing step is introduced to eliminating optic disk and back ground noise. Blood vessel highlighting is prepared by a new method inspired by simple cells in human visual system. An adaptive threshold is introduced as an activation function of simple cells. Post-processing step is us...

2015
Ganesh Naga Sai Prasad V Habibulla Khan E. Gopinathan

The identification of MAs is an important phase in the research and grading of suffering from diabetes retinopathy. We present clustering strategy to identify the microaneurysms from the optic disk and cup in the retinal fundus pictures. Fuzzy C-Means (FCM) Clustering is used for clustering the information in which the information factors are grouped with different account level. The first and ...

2016
Abdourahman Cham Mayank Bansal Himanshu K Banda Young Kwon Paul S Tlucek Alexander G Bassuk Stephen H Tsang Warren M Sobol James C Folk Steven Yeh Vinit B Mahajan

OBJECTIVE The objective of this study was to review the treatment outcomes of patients with secondary glaucoma in cases of autosomal dominant neovascular inflammatory vitreoretinopathy (ADNIV), a hereditary autoimmune uveitis due to mutations in CAPN5. PATIENTS AND METHODS A retrospective, observational case series was assembled from ADNIV patients with secondary glaucoma. The main outcome me...

Journal: :Archivos de la Sociedad Espanola de Oftalmologia 2013
E Santos-Bueso M Serrador-García J García-Sánchez

Beta interferon − INF 1b: Betaferon® and Extavia® (vial 250 g) INF 1a: Avonex® (vial 30 g); Rebif® (vial 22–44 g). Both also in syringes and preloaded containers. RR MS Pseudo-fever syndrome, depression, psychiatric disorders, moderate myelosuppression, hypotension, high liver enzymes, cough, dyspnea, proteinuria, OHT, hyperuricemia, KI, neuropathy, confusion, edema, hair loss, digestive altera...

2006
CARNEGIE MELLON Wipul P. Jayasekara D. N. Lambeth David N. Lambeth Youping Deng

Low mass flying heads for magneto-optic recording would yield fast access times. A design concept for such a head was proposed and computer modeling of its flying characteristics were conducted. Calculations indicated that the head (slider) will follow low frequency undulations the disk (resulting from disk run-out and disk warp) to within one depth of focus of the read/write beam. Thus the ill...

Journal: :The Journal of Cell Biology 1999
Christian A. Leppert Heike Diekmann Claudia Paul Ute Laessing Monika Marx Martin Bastmeyer Claudia A.O. Stuermer

The optic disk-directed growth of retinal ganglion cell axons is markedly disturbed in the presence of polyclonal antineurolin antibodies, which mildly affect fasciculation (Ott, H., M. Bastmeyer, and C.A.O. Stuermer, 1998. J. Neurosci. 18:3363-3372). New monoclonal antibodies (mAbs) against goldfish neurolin, an immunoglobulin (Ig) superfamily cell adhesion/recognition molecule with five Ig do...

2011
Deven Tuli

Glaucoma suspect describes a person with one or more risk factors that may lead to glaucoma, but this individual does not have definite glaucomatous optic nerve damage or visual field defect. The number of individuals with eye findings that raise a suspicion of glaucoma, usually elevated intraocular pressure (IOP) or asymmetric optic disk morphology, far exceeds the number of people who have be...

Journal: :Optics express 2012
Christophe Baker Sebastian Stapfner David Parrain Sara Ducci Giuseppe Leo Eva M Weig Ivan Favero

We report time domain observations of optical instability in high Q silicon nitride whispering gallery disk resonators. At low laser power the transmitted optical power through the disk looks chaotic. At higher power, the optical output settles into a stable self-pulsing regime with periodicity ranging from hundreds of milliseconds to hundreds of seconds. This phenomenon is explained by the int...

2015
Neeraj Sharma Amandeep Verma

Diabetic retinopathy and glaucoma are one of the major cause of blindness. Early stage segmentation and detection of optic disc may be of great help to ophthalmologist for treatment of patient before any serious complications. In this paper new methodology is proposed for the detection of the optical disk from the retinal images. Input image is first preprocessed using spatial average filtering...

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