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Automatic cup-to-disc ratio measurement system

A cup-to-disk ratio and sight-cup technology, applied in the system field, can solve the problems of no clear results and no clear description of the image set, and achieve the effect of consistent measurement and objective measurement.

Inactive Publication Date: 2011-06-29
科学、技术与研究机构 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the cup-to-disk ratio is measured in this paper, no clear results are given, and the image set used for testing is not clearly described

Method used

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  • Automatic cup-to-disc ratio measurement system

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Embodiment Construction

[0033] 1. Method description

[0034] Here, refer to figure 2 , will illustrate the method of an embodiment of the present invention, figure 2 All steps of the invention are shown. image 3 The same process is shown briefly and the same reference numerals are used for corresponding steps. This embodiment is referred to herein as "ARGALI".

[0035] The input of the present invention is a fundus image. The first stage of the method is to identify the optic disc in three steps. Initially, the image goes through an optional step of finding the approximate location of the optic disc in the form of a useful area (step 1). Then, through a variational level-set approach based on the concept of global optimization, a segmentation step (step 2) is performed to segment the optic disc boundary and extract the optic disc region from the fundus image. Afterwards, the step of smoothing the boundaries is implemented (step 3).

[0036] In phase 2 of the method, the optic cup is identi...

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Abstract

A two-dimensional retinal fundus image of the retinal fundus of an eye is processed by optic disc segmentation (2) followed by optic cup segmentation 4. Data derived from the optic disc segmentation (i.e. the output of the disc segmentation (2) and / or data derived from the output of the optic disc segmentation step, e.g. by a smoothing operation (3)) and data derived from the output of the optic cup segmentation (i.e. the output of the cup segmentation (4) and / or data derived from the output of the optic disc segmentation, e.g. by a smoothing operation (5)) are fed to an adaptive model which has been trained to generate from such inputs a value indicative of cup-to-disc ratio (CDR) of the eye. The CDR is indicative of glaucoma. Thus, the method can be used to screen patients for glaucoma.

Description

technical field [0001] The present invention relates to a system having a method and apparatus for automatically measuring the ratio of the respective diameters of the optic disc cup (referred to herein as the optic cup) and optic disc of an eye. This is the "cup-to-disc-ratio" (CDR) of the eyes. This test can be used in the diagnosis or analysis of glaucoma. Background technique [0002] Glaucoma, a leading cause of blindness, is characterized by a persistent loss of axons in the optic nerve. According to the World Health Organization's global database on blindness, glaucoma affects 5.1 million people worldwide, accounting for about 13.4% of the estimated 38 million people who are blind. As the world's population ages rapidly, the incidence of glaucoma will increase, leading to increased healthcare costs and economic burdens. Glaucoma is incurable because the damage to the optic nerve axons is permanent and currently cannot be recovered. However, with early detection, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/12
CPCG06T7/0012G06T2207/20221G06T2207/20084G06T2207/30041G06T2207/10101G06T7/0081A61B3/12G06T7/11
Inventor 刘江李久伟达蒙·王文克李辉奇王铁银
Owner 科学、技术与研究机构
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