Method and system for detecting disc haemorrhages

A technology of optic disc and retina, applied in image analysis, image enhancement, instruments, etc., can solve the problems that the accuracy comparison has not been evaluated, and the detection method of glaucoma is not suitable for large-scale screening

Inactive Publication Date: 2012-12-26
SINGAPORE HEALTH SERVICES PTE +2
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  • Abstract
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Problems solved by technology

However, the accuracy of results obtained from color intensity-based methods compared to clinical reality has not been assessed
[0012] Methods for determining the optic cup and optic disc using information from stereophotographs have also been developed [9,10], and while some results from these methods seem promising, the disadvantage of these methods is that stereophotography (compared to ARGALI and Contrary to monocular photography used in ) requires specific hardware as well as specialized training
This may make glaucoma detection using stereo photography unsuitable for large-scale screening

Method used

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  • Method and system for detecting disc haemorrhages
  • Method and system for detecting disc haemorrhages
  • Method and system for detecting disc haemorrhages

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Embodiment Construction

[0026] Such as figure 1 Shown, the location of the optic disc hemorrhage is indicated by an arrow in the color and red-free retinal fundus images. Optic disc hemorrhage is an important negative prognostic factor in glaucoma [14]. Disc hemorrhage or hemorrhage across the optic disc has been reported to precede retinal nerve fiber layer damage and visual field loss in subjects with glaucoma or ocular hypertension. Therefore, introducing optic disc hemorrhage detection into the glaucoma detection system can provide more robust glaucoma detection. For example, some glaucomatous retinal nerve heads do show normal CDRs, and in such cases signs such as optic disc hemorrhages would be an important clue in the detection of glaucoma.

[0027] Optic disc hemorrhage is rarely seen in normal human eyes, about 4%-7% of glaucomatous eyes can detect optic disc hemorrhage [15], and at least one-third of glaucomatous patients exhibit at some time [13] optic disc hemorrhage . Disc hemorrhage...

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Abstract

A method for detecting disc haemorrhages in a retinal fundus image. The method includes (a) identifying a ring-shaped region of interest in the retinal fundus image encompassing the optic disc boundary; (b) removing blood vessel regions in the identified region of interest; (c) detecting candidate disc haemorrhages from the removed blood vessels regions in the identified region of interest; and (d) screening the candidate disc haemorrhages. The detected disc haemorrhages may be used to aid in the detection of glaucoma.

Description

technical field [0001] The invention relates to a method and system for detecting optic disc hemorrhage in non-stereo retinal fundus images, and the method and system can assist in detecting glaucoma. Background technique [0002] Glaucoma is a chronic eye condition in which the nerve that connects the brain to the eye, the optic nerve, is increasingly damaged. Patients with early glaucoma have no visual symptoms, but patients with mildly advanced glaucoma may complain of "tunnel vision" (ie, seeing only the central field of vision), a loss of peripheral vision as the disease progresses. People with advanced glaucoma may even become completely blind at a later stage. [0003] There have been two large-scale surveys of glaucoma in Singapore (Tanjong Pagar Study and Singapore Malay Eye Study) [1,2]. These surveys indicated that the prevalence of glaucoma among adults (40 years and above) in Singapore was 3-4%, and more than 90% of patients were unaware that they had glaucoma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/12
CPCG06T7/0083G06T2207/30041G06T7/0014A61B3/12A61B3/1241G06T2207/30101G06T2207/10024G06T7/12
Inventor 张卓刘江黄永基林如晖陈彦鸣李慧琦吕士健黄天荫
Owner SINGAPORE HEALTH SERVICES PTE
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