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Method and system for ultrasonic detection of cornea viscoelasticity

An ultrasonic testing and viscoelasticity technology, which is used in eye testing equipment, eye examination and other directions, can solve the problems of complex equipment and cannot fully reflect mechanical properties, and achieves the effect of low cost, good market promotion prospects and easy realization.

Inactive Publication Date: 2013-04-03
SHENZHEN UNIV
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Problems solved by technology

It aims to solve the problem of complex equipment and inability to fully reflect the mechanical properties of the in vivo corneal elastogram obtained by ultrasonic methods in the prior art

Method used

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  • Method and system for ultrasonic detection of cornea viscoelasticity
  • Method and system for ultrasonic detection of cornea viscoelasticity

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Embodiment Construction

[0020] The present invention provides a method and system for ultrasonic detection of corneal viscoelasticity. In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] see figure 1 , which is a flow chart of the method for ultrasonically detecting corneal viscoelasticity of the present application. As shown in the figure, the method for ultrasonic detection of corneal viscoelasticity includes the following steps:

[0022] S1. Make the sound wave with a certain power focus on the cornea to generate a sound radiation force on the cornea; under the action of the sound radiation force, the cornea generates a small vibration, and the vibration propagates outward in the form of Lamb waves in the cornea ;

[0...

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Abstract

The invention discloses a method and system for ultrasonic detection of cornea viscoelasticity. The method comprises the following steps of firstly, focusing sound waves with certain power onto a cornea to generate a sound radiant force on the cornea; under the action of the sound radiant force, the cornea generating slight vibration, and the vibration propagating outwards in the cornea in a Lamb wave way; then, transmitting a detection pulse to an eyeball, the pulse reflecting in the tissues of the eyeball to form echo, and receiving the echo; and finally, extracting the vibration information of the cornea from the echo, and according to a certain mathematical model, obtaining an elastic module and a viscosity coefficient of the cornea. The elastic module and the viscosity coefficient can be simultaneously and quantitatively measured, and mechanical properties of the cornea are fully described. Meanwhile, the system has the advantages that the structure is simple, easy implementation is realized, the cost is low, and the like. The system can be used as independent equipment, and also can be used as an additional function module to be loaded onto the existing color ultrasonic system for use, so the market population prospect is better.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to a method and system for ultrasonic detection of corneal viscoelasticity. Background technique [0002] The cornea is a circular transparent structure at the front of the eyeball. It not only maintains the shape of the eyeball together with the sclera to protect the tissues in the eye, but also is an important part of the refractive system of the eyeball. Its shape and focal length affect 70% of the refractive power of the whole eye. As a biological tissue, the cornea exhibits biomechanical properties such as nonlinear stress-strain relationship, anisotropy, and viscoelasticity. These mechanical properties not only show obvious individual differences, but also change due to corneal refractive surgery, certain lesions or trauma; on the other hand, abnormal mechanical properties will not only increase the risk of corneal refractive surgery, but also cause intraocular pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/10
Inventor 张新宇陈昕梁平陈思平汪天富
Owner SHENZHEN UNIV
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