EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method

A signal acquisition and processing system technology, applied in medical science, sensors, diagnostic recording/measurement, etc., can solve problems such as eye discomfort, contact lens electrodes should not be reused, and ERG signal acquisition is not suitable.

Active Publication Date: 2015-02-04
NORTHEASTERN UNIV
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Problems solved by technology

[0007] The traditional ERG measurement uses contact lens electrodes, which need to be placed on the surface of the cornea. Due to the special position of the detection electrodes, the patient's blinking and eye movements during the detection process will cause serious eye discomfort. Wearing it correctly is likely to cause some damage to...

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  • EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method
  • EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method
  • EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method

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[0072] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0073] A kind of ERG signal acquisition and processing system based on EOG, such as figure 1 As shown, it includes a control unit, a retinal stimulator unit, a retinal electrical signal acquisition unit and a retinal electrical signal processing unit;

[0074] The control unit is used to adjust the frequency of stimulating light flashes, control the retinal electrical signal acquisition unit to perform signal acquisition, AD conversion and data storage;

[0075]The control unit is realized by using the MSP430F149 ultra-low-power single-chip microcomputer produced by TI Company as an example. The single-chip microcomputer has the characteristics of low voltage and ultra-low power consumption, 1.8V to 3.6V working power supply voltage, 60KB program memory size, and 8MHz maximum clock frequency. The main control unit is mainly res...

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Abstract

The invention discloses an EOG (Electrooculography)-based ERG (Electroretinography) signal acquisition and processing system and method. The system comprises a control unit, a retinal stimulator unit, an ERG signal acquisition unit and an ERG signal processing unit. The method comprises the following steps: adjusting illumination and flash rate of a stimulation light source; arranging three skin electrodes on the forehead just above eyes of a subject, on the inner sides of the eyes and the bridge of a nose and at eyelids respectively; performing dark adaptation for more than 20 minutes; aligning the eyes of the subject to the stimulation light source; acquiring an EOG signal; performing light stimulation on the eyes of the subject, synchronously acquiring the ERG signals on the inner sides of the eyes and the bridge of the nose and at the eyelids of the subject respectively, and storing after signal conditioning and AD (Analog-Digital) conversion; reading the ERG signals by an ERG signal processing and analysis unit and processing and analyzing the ERG signal. The ERG signals are acquired by using the external skin electrodes, so that the acquisition is more convenient and safer, and the cost is lower; for signal processing, the adopted method is small in operation and high in feasibility and can realize rapid signal processing.

Description

technical field [0001] The invention relates to the technical field of visual signal acquisition and processing, in particular to an EOG-based ERG signal acquisition and processing system and method. Background technique [0002] The visual system is one of the most important sensory systems of human beings, and diseases of the visual system seriously threaten our normal life. Many lesions of the visual system are gradual, and early detection and treatment are important topics in clinical ophthalmology, preventive medicine, and epidemiology. Compared with traditional psychophysical examination, visual electrophysiological examination can realize a comprehensive diagnosis of visual pathway from the perspective of electrophysiology, and provides a more suitable means for the detection of early visual lesions. Traditional visual electrophysiology includes three aspects: electroretinography (Electroretinography, ERG), visual evoked potential (Visual Evoked Potential, VEP), elec...

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Application Information

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IPC IPC(8): A61B5/0496
CPCA61B5/7235A61B5/398
Inventor 王璐李锡勇岳耀灿郝丽玲徐礼胜张福利康雁
Owner NORTHEASTERN UNIV
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