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1 General aspects (0)   1.1 Epidemiology (6)   1.2 Population genetics (1)   1.3 Pathogenesis (0)   1.4 Quality of life (1)   1.5 Glaucomas as cause of blindness (4)   1.6 Prevention and screening (2) 2 Anatomical structures in glaucoma (0)   2.1 Conjunctiva (1)   2.2 Cornea (2)   2.3 Sclera (0)   2.4 Anterior chamber angle (2)   2.5 Meshwork (1)     2.5.1 Trabecular meshwork (16)     2.5.2 Schlemms canal (0)     2.5.3 Scleral outlet channels (0)   2.6 Aqueous humor dynamics (0)     2.6.1 Production (2)     2.6.2 Outflow (2)       2.6.2.1 Trabecular meshwork (2)       2.6.2.2 Uveoscleral (1)     2.6.3 Compostion (0)   2.7 Episcleral veins and venous pressure (0)   2.8 Iris (0)   2.9 Ciliary body (1)   2.10 Lens (0)   2.11 Vitreous body (0)   2.12 Choroid, peripapillary choroid, peripapillary atrophy (1)   2.13 Retina and retinal nerve fibre layer (8)   2.14 Optic disc (11)   2.15 Optic nerve (1)   2.16 Chiasma and retrochiasmal central nervous system (0)   2.17 Stem cells (0)   2.20 Other (1) 3 Laboratory methods (0)   3.1 Microscopy (0)   3.2 Electron microscopy (0)   3.3 Immunohistochemistry (11)   3.4 Molecular genetics (3)     3.4.1 Linkage studies (6)     3.4.2 Gene studies (7)   3.5 Molecular biology incl. SiRNA (6)   3.6 Cellular biology (6)   3.7 Biochemistry (1)   3.8 Pharmacology (1)   3.9 Pathophysiology (6)   3.10 Immunobiology (0)   3.11 Pharmacogenetics (0)   3.12 Proteomics (0)   3.13 In vivo imaging (0)     3.13.1 Laser Scanning (0)       3.13.1.1 Confocal Scanning Laser Ophthalmoscopy (0)       3.13.1.2 Confocal Scanning Laser Polarimetry (0)     3.13.2 Optical Coherence Tomography (0)       3.13.2.1 Anterior Segment (0)       3.13.2.2 Posterior Segment (0)     3.13.3 RGC Imaging (0)     3.13.4 Other (0)   3.20 Other (1) 4 Tissue culture of ocular cells (0) 5 Experimental glaucoma; animal models (13)   5.1 Rodent (0)   5.2 Primates (0)   5.3 Other (0) 6 Clinical examination methods (2)   6.1 Intraocular pressure measurement; factors affecting IOP (15)     6.1.1 Devices, techniques (0)     6.1.2 Fluctuation, circadian rhythms (0)     6.1.3 Factors affecting IOP (0)   6.2 Tonography, aqueous flow measurement (see also 2.6) (1)   6.3 Biomicroscopy (slitlamp) (0)     6.3.1 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Refractive errors in relation to glaucoma (0)   8.1 Myopia (0)   8.2 Hypermetropia (0)   8.3 Contact lenses (0)   8.4 Refractive surgical procedures (2)   8.5 Other (0) 9 Clinical forms of glaucomas (0)   9.1 Developmental glaucomas (0)     9.1.1 Congenital glaucoma, Buphthalmos (1)     9.1.2 Juvenile glaucoma (1)     9.1.3 Syndromes of Axenfeld, Rieger, Peters, aniridia (2)     9.1.4 Other (2)   9.2 Primary open angle glaucomas (0)     9.2.1 Ocular hypertension (0)     9.2.2 Other risk factors for glaucoma (8)     9.2.3 Open angle glaucoma with elevated IOP (1)     9.2.4 Normal pressure glaucoma (3)   9.3 Primary angle closure glaucomas (4)     9.3.1 Acute primary angle closure glaucoma (pupillary block) (4)     9.3.2 Chronic primary angle closure glaucoma (pupillary block) (1)     9.3.3 Plateau iris syndrome (2)     9.3.4 Primary angle closure suspect (0)     9.3.5 Primary angle closure (0)     9.3.10 Other (2)   9.4 Glaucomas associated with other ocular and systemic disorders (0) 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with intraocular tumors (0)     9.4.9 Glaucomas associated with elevated episcleral venous pressure (2)       9.4.10 Glaucomas associated with hemorrhage (0)     9.4.11 Glaucomas following intraocular surgery (0)       9.4.11.1 Ciliary block (malignant) glaucoma (0)       9.4.11.2 Glaucomas in aphakia and pseudophakia (0)       9.4.11.3 Epithelial, fibrous, and endothelial proliferation (0)       9.4.11.4 Glaucomas associated with corneal surgery (0)       9.4.11.5 Glaucomas associated with vitreoretinal surgery (0)     9.4.15 Glaucoma in relation to systemic disease (4)     9.4.20 Other (1) 10 Differential diagnosis e.g. anterior and posterior ischemic optic neuropathy (6) 11 Medical treatment (0)   11.1 General management, indication (6)   11.2 Cholinergic drugs (0)   11.3 Adrenergic drugs (0)     11.3.1 Epinephrine (0)     11.3.2 Thymoxamine, dapiprazole (0)     11.3.3 Apraclonidine, brimonidine (5)     11.3.4 Betablocker (14)     11.3.5 Other (2)   11.4 Prostaglandins (22)   11.5 Carbonic anhydrase inhibitors (0)     11.5.1 Systemic (0)     11.5.2 Topical (9)   11.6 Osmotic treatment (2)   11.7 Treatment of bloodflow (3)   11.8 Neuroprotection (6)   11.9 Gene therapy (1)   11.13 Combination therapy (0)     11.13.1 Betablocker and pilocarpine (0)     11.13.2 Betablocker and carbon anhydrase inhibitor (0)     11.13.3 Betablocker and brimonidine (0)     11.13.4 Betablocker and prostaglandin (0)     11.13.5 Other (0)   11.14 Investigational drugs; pharmacological experiments (4)   11.15 Other drugs in relation to glaucoma (5)   11.16 Vehicles, delivery systems, pharmacokinetics, formulation (1)   11.17 Cooperation with medical therapy e.g. persistency, compliance, adherence (0)   11.20 Other (1) 12 Surgical treatment (0)   12.1 General management, indication (1)   12.2 Laser iridotomy (3)   12.3 Laser iridoplasty (1)   12.4 Laser trabeculoplasty and other laser treatment of the angle (2)   12.7 Surgical iridectomy (0)   12.8 Filtering surgery (0)     12.8.1 Without tube implant (5)     12.8.2 With tube implant or other drainage devices (8)     12.8.3 Non-perforating (12)     12.8.4 Using laser (0)     12.8.5 Other (0)     12.8.10 Woundhealing antifibrosis (14)     12.8.11 Complications, endophthalmitis (3)   12.9 Trabeculotomy, goniotomy (2)   12.10 Cyclodestruction (4)   12.11 Cyclodialysis (0)   12.12 Cataract extraction (0)     12.12.1 Intracapsular (0)     12.12.2 Extracapsular (0)     12.12.3 Phacoemulsification (3)   12.14 Combined cataract extraction and glaucoma surgery (0)     12.14.1 Intracapsular (0)     12.14.2 Extracapsular (0)     12.14.3 Phacoemulsification (0)   12.15 Capsulotomy (0)   12.16 Vitrectomy (0)   12.17 Anesthesia (2)   12.20 Other (3) 13 Therapeutic prognosis and outcome (0)   13.1 Prognostic factors (0)   13.2 Outcome (0)     13.2.1 IOP (0)     13.2.2 Visual field (0)       13.2.2.1 Progression (0)       13.2.2.2 Improvement (0)     13.2.3 Other (0) 14 Costing studies; pharmacoeconomics (3) 15 Miscellaneous (4)

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Abstract #9782 Published in IGR 5-3

Detecting glaucomatous wedge shaped defects in polarimetric images

Vermeer KA; Vos FM; Lemij HG; Vossepoel AM
Medical Image Analysis 2003; 7: 503-511

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Wedge-shaped defects of the retinal nerve fiber layer (RNFL) may occur in glaucoma. Currently, automatic detection of wedge-shaped defects in scanning laser polarimetry (SLP) images of the RNFL is not available. An automatic classification is currently based only on Global parameters, thereby ignoring important local information. The present method works by a modified dynamic programming technique that searches for locally strong edges with a preference for straight edges. These edges are initially classified based on their strength and next combined into wedge shaped defects. This method yielded a sensitivity of 73% and a specificity of 90% on a limited set of 65 images.

Dr. K.A. Vermeer, Pattern Recognition Group, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands

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Classification:

6.9.1 Laser scanning (Part of: 6 Clinical examination methods > 6.9 Computerized image analysis)

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