CN201182599Y - Multifocal visual electrophysiology equipment based on PC platform - Google Patents
Multifocal visual electrophysiology equipment based on PC platform Download PDFInfo
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- CN201182599Y CN201182599Y CNU2008201073029U CN200820107302U CN201182599Y CN 201182599 Y CN201182599 Y CN 201182599Y CN U2008201073029 U CNU2008201073029 U CN U2008201073029U CN 200820107302 U CN200820107302 U CN 200820107302U CN 201182599 Y CN201182599 Y CN 201182599Y
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Abstract
The utility model discloses a PC-platform-based multi-focal visual electrophysiology equipment, to solve the problems that the electrophysiology equipment in the prior art can only carry out conventional visual electrophysiological testing or multi-focal visual electrophysiological testing and can not meet the relevant inspection standards of the International Society for Clinical Electrophysiology of Vision (ISCEV) and is inconvenient to operate; the equipment provided by the utility model comprises a computer processing and management system, as well as a graphics stimulator, a full-vision stimulator and a bio-electricity amplifier which are connected with the computer processing and management system, and a data acquisition system; wherein, the computer processing and management system comprises a data receiving system, a data processing system and a marking system; the graphics stimulator comprises a graphics stimulator main control system, as well as a conventional graphics stimulation system and a multi-focal graphics stimulation system which are connected with the graphics stimulator main control system. The utility model is used for professional doctors to conduct clinical testing on the functions of the visual system and the nervous system of patients.
Description
Technical Field
The utility model relates to a vision electrophysiological equipment, in particular to a multifocal vision electrophysiological equipment based on PC platform.
Background
In medicine, certain diseases of the eye or the optic nervous system are often diagnosed by visual electrophysiological examination, for example: since cataract, retinopathy, etc. are accompanied by optic nerve diseases or retinal diseases, performing visual electrophysiological examination is extremely important for diagnosing and observing some eye or optic nerve diseases.
Currently, the visual electrophysiological equipments generally used in clinic are divided into two types: conventional visual electrophysiological detection devices and multifocal visual electrophysiological detection devices.
Conventional ocular electrophysiological tests include electroretinograms, iridescent electroretinograms, graphical electroretinograms, and visual evoked potentials. Electroretinograms are prepared by placing skin electrodes on the nasal and temporal sides of the eyeball and recording the amplitude of the polarized resting potential and the light response, which reflects the function of the retinal pigment epithelium. The iridescent electroretinogram is a record of the responses of the retina to light stimuli, which in the current international standard records five responses: rod cell responses (dark adaptation), maximum mixed responses of dark adapted eyes (dark adaptation), oscillating potentials (dark adaptation), cone cell responses (light adaptation), responses to rapid repetitive stimuli (flashing light fusion frequency), and flashing electroretinogram can evaluate the function of cones and rods. The graphical electroretinogram is a graph that records the response of the retina to a graphical stimulus, which may reflect the function of the apparent ganglion cells. Visual evoked potentials are recordings of the electrical activity of the visual cortex in response to a pattern or flash stimulus, which may reflect the function of the visual pathway.
The multifocal visual electrophysiological examination is carried out by recording the responses obtained in the retina or visual cortex through special graphic stimulation, and the multifocal visual electrophysiological examination corresponds to the conventional visual electrophysiological examination, and has a multifocal electroretinogram and a multifocal visual evoked potential. Multifocal electroretinograms can reflect the function of a part of the retina. Multifocal visual evoked potentials may reflect the function of visual pathways.
The inventors have found that the visual electrophysiological equipment of the prior art has the following disadvantages: the method can only carry out conventional visual electrophysiological detection or multifocal visual electrophysiological detection, cannot meet the relevant inspection standards of the international clinical society for visual electrophysiology (ISCAV), and has inconvenient operation, poor stability and poor anti-interference capability.
SUMMERY OF THE UTILITY MODEL
The utility model provides a multifocal vision electrophysiological equipment based on PC platform, this equipment can carry out two kinds of detections of conventional vision electrophysiological detection and multifocal vision electrophysiological detection, satisfies the relevant inspection standard of international clinical vision electrophysiological society of electrical and physiological (ISCAV) to equipment convenient operation.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a multi-focus vision electrophysiological equipment based on a PC platform comprises a computer processing and management system, a graphic stimulator, a full-visual-field stimulator, a bioelectric amplifier and a data acquisition system, wherein the graphic stimulator, the full-visual-field stimulator, the bioelectric amplifier and the data acquisition system are connected with the computer processing and management system; wherein,
the computer processing and management system comprises a data receiving system, a data processing system and a marking system;
the graphic stimulator comprises a graphic stimulator main control system, a conventional graphic stimulation system and a multi-focus graphic stimulation system, wherein the conventional graphic stimulation system and the multi-focus graphic stimulation system are connected with the graphic stimulator main control system;
after the figure stimulator or the full-visual field stimulator stimulates the vision of the living body, the bioelectricity amplifier records stimulation data, and then the data acquisition system performs analog-to-digital conversion on the data and transmits the data to the computer processing and management system; after the data receiving system of the computer processing and management system receives the data, the data processing system and the marking system respectively process and mark the data.
The utility model discloses a many burnt vision electrophysiological equipment based on PC platform adopts the integrated design of conventional vision electrophysiological equipment and many burnt vision electrophysiological equipment, not only can carry out two kinds of detections of conventional vision electrophysiological detection and many burnt vision electrophysiological detection, has still satisfied the relevant inspection standard of international clinical vision electrophysiological society of electrical physiology (ISCAV) better to convenient to use.
Drawings
FIG. 1 is a schematic structural diagram of the multi-focus vision electrophysiological equipment based on the PC platform of the present invention;
FIG. 2 is a schematic diagram of the structure of the graphical stimulator of the apparatus of FIG. 1;
FIG. 3 is a schematic view of the configuration of the whole-field stimulator of the apparatus of FIG. 1;
FIG. 4 is a schematic diagram of the structure of the bioelectrical amplifier of the apparatus shown in FIG. 1;
FIG. 5 is a schematic diagram of a data acquisition system of the apparatus of FIG. 1;
fig. 6 is a schematic diagram of the structure of a computer processing and management system of the device shown in fig. 1.
Detailed Description
The utility model provides a multifocal vision electrophysiological equipment based on PC platform for solve among the prior art electrophysiological equipment can only carry out conventional vision electrophysiological detection or multifocal vision electrophysiological detection, can not satisfy international clinical vision electrophysiological society of electrical physiology (ISCAV) relevant check-out standard, operate inconvenient problem. The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, the multi-focus vision electro-physiological apparatus based on PC platform of the present invention comprises a computer processing and managing system, a graphic stimulator connected with the computer processing and managing system through a computer control interface, a full visual field stimulator, a bioelectric amplifier and a data collecting system; wherein the computer processing and management system comprises a data receiving system, a data processing system, and a tagging system.
When the conventional visual electrophysiological detection and the multi-focus visual electrophysiological detection are carried out, after the graphic stimulator or the full-field stimulator carries out visual stimulation on an organism, the bioelectric amplifier records stimulation data, and then the data acquisition system carries out analog-to-digital conversion on the data and transmits the data to the computer processing and management system; after the data receiving system of the computer processing and management system receives the data, the data processing system and the marking system respectively process and mark the data.
As shown in fig. 2, the graphical stimulator includes a graphical stimulator main control system, a conventional graphical stimulation system connected to the graphical stimulator main control system, a multi-focus graphical stimulation system, and a P300 stimulation system. The graphic stimulator main control system receives instructions from the computer processing and management system through the computer control interface, and then generates corresponding stimulation graphics by controlling the conventional graphic stimulation system, the multi-focus graphic stimulation system and the P300 graphic stimulation system.
Conventional graphical stimulation systems may produce multiple spatial frequency, multiple color, multiple pattern stimulation patterns.
The multi-focus pattern stimulation system adopts a multi-focus stimulation pattern which mainly comprises concentric circular ring-shaped multi-focus stimulation patterns, is compatible with other stimulation pattern modes, and can change the size, color and number of the stimulation patterns.
The P300 graphic stimulation system can output a target stimulation graphic and a non-target stimulation graphic, the colors and the types of the target stimulation graphic and the non-target stimulation graphic are variable, and double random stimulation with random occurrence time and random occurrence types is adopted to improve the reliability of recording.
To greatly reduce the recorded signal artifacts originating from the graphic stimulus system, the graphic stimulator uses a display field frequency higher than 100 hz as the stimulus frequency for normal and multi-focal.
As shown in fig. 3, the full-field stimulator includes a full-field stimulator main control system, a flash stimulator connected to the full-field stimulator main control system, an EOG stimulator, and a sound prompter. The main control system of the full visual field stimulator receives instructions from the computer processing and management system through the computer control interface and then generates corresponding light stimulation by controlling the flash stimulator, the EOG stimulator and the sound prompter.
The flash stimulator can generate stable and constant light, single flash and high-frequency continuous flash output, and the stimulation time, stimulation interval, stimulation intensity and the like of the light can be adjusted.
The EOG stimulator realizes the stimulation of recording the electrooculogram by controlling the fixed light-emitting diode, and can control the stimulation frequency and the background light intensity.
The voice prompter generates voice output, and the matching degree of the patient can be improved in the detection process.
The light source adopted by the full-visual field stimulator is a light emitting diode, so that the stable control of the light source is convenient to realize. For better lighting effect, white light emitting diodes are preferred. In addition, the whole-field stimulator can also perform active calibration.
As shown in fig. 4, the bioelectric amplifier comprises a bioelectric amplifier main control system, a pre-amplifying circuit, a secondary amplifying circuit, a high-frequency filtering circuit, a low-frequency filtering circuit and a third-stage amplifying circuit, which are connected with the bioelectric amplifier main control system; the pre-amplification circuit, the secondary amplification circuit, the high-frequency filter circuit, the low-frequency filter circuit and the third-stage amplification circuit are connected in sequence in a cascade mode. The bioelectricity amplifier main control system receives instructions from the computer processing and management system through the computer control interface and then respectively controls the pre-amplifying circuit, the secondary amplifying circuit, the high-frequency filtering circuit, the low-frequency filtering circuit and the third-stage amplifying circuit.
The pre-amplification circuit realizes the primary amplification of signals, and the amplification factor is adjustable.
The secondary amplifying circuit realizes secondary amplification of signals, and the amplification factor is adjustable.
The high-frequency filter circuit realizes the filtering of high-frequency signals, and the filtering frequency band is adjustable.
The low-frequency filter circuit realizes the filtering of low-frequency signals, and the filtering frequency band is adjustable.
The third-stage amplifying circuit realizes secondary amplification of signals, and the amplification factor is adjustable.
The bioelectricity amplifier adopts the multi-stage cascade design, is controlled by programs, and is convenient to control. In order to improve the anti-interference capability, the bioelectric amplifier does not adopt a wave trap.
The bioelectricity amplifier ensures high anti-interference capability through the good process design (namely, measures of signal amplification, filtration, re-amplification and the like).
The bioelectricity amplifier can be externally connected with an interference detector and used for detecting and searching an external differential mode interference source, the problem of environmental noise is solved before an experiment, and the stability and the reliability of the visual electrophysiology equipment are improved.
As shown in fig. 5, the data acquisition system includes a data acquisition main control system, a stimulation sampling synchronous control system connected to the data acquisition main control system, a sampling system, and a data transmission system. The data acquisition main control system receives an instruction from the computer processing and management system through the computer control interface, controls the stimulation sampling synchronous control system and the sampling system, and transmits sampling data back to the computer processing and management system through the data transmission system.
The stimulation and sampling synchronous control system synchronizes stimulation and sampling processes, and ensures the synchronization of data in time.
The sampling system comprises sub-functional modules of analog-to-digital conversion, data extraction, data buffering and the like.
The data transmission system passes data to the computer processing and management system through data connection lines.
The data sampling has two modes of continuous sampling and discontinuous sampling.
As shown in fig. 6, the computer processing and management system includes a data receiving system, a data processing system, and a marking system, and additionally includes a database management system and a printing system. The computer processing and management control system controls the graphic stimulator, the full-visual-field stimulator, the bioelectric amplifier and the data acquisition system through the computer control interface, receives the sampling data through the data receiving system, and then respectively processes, marks and prints and outputs the data through the data processing system, the marking system and the printing system; a database management system may enable management of data.
The data receiving system receives the sampled data and decodes the data.
The data processing system completes the amplification, reduction, translation, turnover, averaging, superposition, filtering and digital signal processing of the data.
The marking system provides marking, measuring, counting and analyzing of the detection result.
The printing system can output printing results of different formats, different styles and different paper according to the needs of users.
The database management system manages the data according to the medical record mode of the patient and can realize the sequencing and searching of the data.
The computer processing and management system is a full Chinese interface, is friendly to man-machine interaction, provides combined operation of a keyboard and a mouse, namely learning-to-meeting interface design and true color graphic display, can customize an operation interface style, and greatly improves the use simplicity of equipment.
The computer processing and management system can customize the test and examination set through the examination set design function, and establish an expert system for different clinical disease examinations.
The computer processing and management system can also be configured with recording optical drive and other devices to provide reliable and large-capacity backup for data.
The utility model discloses a many burnt vision electrophysiological equipment based on PC platform adopts the integrated design of conventional vision electrophysiological equipment and many burnt vision electrophysiological equipment, not only has two kinds of vision electrophysiological equipment's advantage has still satisfied the relevant inspection standard of international clinical vision electrophysiological society (ISCAV) better, has improved the stability of system, and the interference killing feature is strong to convenient to use. Therefore, the utility model is suitable for the medical professional to clinically detect the functions of the visual system and the nervous system of the patient.
Claims (10)
1. A multi-focus vision electrophysiological equipment based on a PC platform, characterized in that: the system comprises a computer processing and management system, a graphic stimulator connected with the computer processing and management system, a full-visual-field stimulator, a bioelectric amplifier and a data acquisition system; wherein,
the computer processing and management system comprises a data receiving system, a data processing system and a marking system;
the graphic stimulator comprises a graphic stimulator main control system, a conventional graphic stimulation system and a multi-focus graphic stimulation system, wherein the conventional graphic stimulation system and the multi-focus graphic stimulation system are connected with the graphic stimulator main control system;
after the figure stimulator or the full-visual field stimulator stimulates the vision of the living body, the bioelectricity amplifier records stimulation data, and then the data acquisition system performs analog-to-digital conversion on the data and transmits the data to the computer processing and management system; after the data receiving system of the computer processing and management system receives the data, the data processing system and the marking system respectively process and mark the data.
2. The PC platform based multifocal visual electrophysiology apparatus of claim 1, wherein: the full-visual-field stimulator comprises a full-visual-field stimulator main control system, and a flash stimulator, an EOG stimulator and a sound prompter which are connected with the full-visual-field stimulator main control system.
3. The PC platform based multifocal visual electrophysiology apparatus of claim 1 or 2, wherein: the light source of the full-visual field stimulator is a light emitting diode.
4. The PC platform based multifocal visual electrophysiology apparatus of claim 1 or 2, wherein: the data acquisition system comprises a data acquisition main control system, a stimulation sampling synchronous control system, a sampling system and a data transmission system, wherein the stimulation sampling synchronous control system, the sampling system and the data transmission system are connected with the data acquisition main control system.
5. The PC platform-based multifocal visual electrophysiology apparatus of claim 4, wherein: the computer processing and management system also comprises a database management system and a printing system which are respectively used for realizing the management and the printout of the data.
6. The PC platform-based multifocal visual electrophysiology apparatus of claim 5, wherein: the bioelectric amplifier comprises a bioelectric amplifier main control system, a pre-amplifying circuit, a secondary amplifying circuit, a high-frequency filtering circuit, a low-frequency filtering circuit and a third-stage amplifying circuit, wherein the pre-amplifying circuit, the secondary amplifying circuit, the high-frequency filtering circuit, the low-frequency filtering circuit and the third-stage amplifying circuit are connected with the bioelectric amplifier main control system; wherein,
the pre-amplifying circuit, the secondary amplifying circuit, the high-frequency filter circuit, the low-frequency filter circuit and the third-stage amplifying circuit are connected in sequence in a cascading mode.
7. The PC platform-based multifocal visual electrophysiology apparatus of claim 6, wherein: the bioelectrical amplifier is also connected with an interference detector.
8. The PC platform based multifocal visual electrophysiology apparatus of claim 7, wherein: the graphical stimulator uses a display field frequency higher than 100 hz.
9. The PC platform based multifocal visual electrophysiology apparatus of claim 8, wherein: the pattern used by the multi-focus pattern stimulation system is a concentric circular ring-shaped multi-focus stimulation pattern.
10. The PC platform based multifocal visual electrophysiology apparatus of claim 9, wherein: the graphic stimulator main control system is also connected with a P300 stimulation system.
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| CNU2008201073029U CN201182599Y (en) | 2008-04-08 | 2008-04-08 | Multifocal visual electrophysiology equipment based on PC platform |
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| CNU2008201073029U CN201182599Y (en) | 2008-04-08 | 2008-04-08 | Multifocal visual electrophysiology equipment based on PC platform |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722244A (en) * | 2012-05-25 | 2012-10-10 | 西安交通大学 | Steady-state evoked potential brain-computer interface method based on motion turning vision sensing |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722244A (en) * | 2012-05-25 | 2012-10-10 | 西安交通大学 | Steady-state evoked potential brain-computer interface method based on motion turning vision sensing |
| CN102722244B (en) * | 2012-05-25 | 2014-10-15 | 西安交通大学 | Steady-state evoked potential brain-computer interface method based on motion turning vision sensing |
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Granted publication date: 20090121 Termination date: 20110408 |