CN108606791A - A kind of suction electrode system for human impedance imaging - Google Patents
A kind of suction electrode system for human impedance imaging Download PDFInfo
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- CN108606791A CN108606791A CN201810528479.4A CN201810528479A CN108606791A CN 108606791 A CN108606791 A CN 108606791A CN 201810528479 A CN201810528479 A CN 201810528479A CN 108606791 A CN108606791 A CN 108606791A
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- electrode
- cup
- signal controller
- pair
- cup body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0536—Impedance imaging, e.g. by tomography
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- Health & Medical Sciences (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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- Engineering & Computer Science (AREA)
- Radiology & Medical Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
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- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The present invention relates to a kind of suction electrode systems for human impedance imaging, including：Power supply, the electrode group being made of multiple electrodes body and electrode signal controller, each electrode body is connected with electrode signal controller, it is characterized in that, electrode body includes cup body, electrode pair and electrode interface, the cup body includes shell, inner insulating layer, ground plane and external insulation layer successively from inside to outside, each electrode of electrode pair is fixed between the shell of cup body and inner insulating layer, is stretched from cup edge to bottom of a cup；Electrode pair and ground plane are formed by electrode interface and electrode signal controller and power supply to be electrically connected, and the measuring signal of electrode pair is admitted to electrode signal controller by analog-to-digital conversion circuit；Electrode signal controller, excitation and measuring state and coordination electrode for coordination electrode pair measure contact impedance；The cup body is soft materials, by forming negative pressure state in the cup body of electrode body so that the rim of a cup of electrode body is adsorbed on testee surface.
Description
Technical field
The present invention relates to a kind of electrode systems for human impedance imaging.
Background technology
Review of Electrical Impedance Tomography is a kind of medical image detection technique, can be used for the tissues knot such as torso model, abdominal cavity
The inspection of structure, it usually needs the electrode of 16 and the above equidistantly distributed.By applying current excitation letter to each electrode successively
Number or voltage excitation signals, and acquire the signal detected on other electrodes simultaneously, using algorithm for reconstructing, obtain measuring section
Electrical characteristics are distributed.
Tissue has good electric conductivity, and at different frequencies, variation range is from tens ohm to several for impedance
Hundred ohm；But the contact impedance between electrode and skin can have more significantly with the elastic of the difference and electrode of human body installation
Variation, variation range is from hundreds of ohm to tens of thousands of ohms, and the contact impedance of different location is also different, this is to electrical impedance imaging
There is obvious influence.Therefore, measure and adjust the contact that the contact impedance between electrode and skin is conducive to real-time detecting electrode
Situation improves the quality and stability of electrical impedance imaging.
At present in biomedical sector, electrode is usually laminated structure, and skin surface is pasted on by way of stickup simultaneously
Ensure that electrode and skin contact are good.However, this way of contact pressure is smaller, it is easy to fall off, and contact impedance is unstable.
Invention content
It not easily to fall off is imaged for human impedance the object of the present invention is to provide a kind of measurement contact impedance and stablizing
Electrode system, technical solution is as follows.
A kind of suction electrode system for human impedance imaging, including：Power supply, the electricity being made of multiple electrodes body
Pole group and electrode signal controller, each electrode body are connected with electrode signal controller, which is characterized in that
Electrode body includes cup body, electrode pair and electrode interface, and the cup body includes shell, interior insulation successively from inside to outside
Layer, ground plane and external insulation layer, each electrode of electrode pair are fixed between the shell of cup body and inner insulating layer, from cup edge to
Bottom of a cup stretches；Electrode pair and ground plane are formed by electrode interface and electrode signal controller and power supply to be electrically connected, electrode pair
Measuring signal electrode signal controller is admitted to by analog-to-digital conversion circuit；
Electrode signal controller, excitation and measuring state and coordination electrode for coordination electrode pair measure contact impedance；
The cup body is soft materials, by forming negative pressure state in the cup body of electrode body so that the cup of electrode body
Mouth is adsorbed on testee surface.
Preferably, if electrode signal controller judges that the contact impedance of electrode body and skin is more than predetermined threshold value, judge
Electrode body is bad with skin contact, sends out alarm and feeds back the electrode number of poor contact.
The invention adopts the above technical scheme, which has the following advantages：
1) fix electrode by the way of closing tiny structure cavity, improve the stability of electrode position, ensure electrode with
The reliability of skin contact；
2) contact impedance that can detect each electrode and skin instructs survey crew to be bonded electrode, coordination electrode fitting
Quality；
3) it can improve adaptability of the electrode system to different building shape with flexible modulation number of electrodes, enhance electrode
The flexibility that system uses.
Description of the drawings
Fig. 1 is electrode group structure schematic diagram.
Fig. 2 is the circuit structure diagram of electrode system.
Fig. 3 is scheme of installation of the electrode in torso model.
Fig. 4 is the structural schematic diagram of electrode body.
Fig. 5 is electrode body vertical view.
Fig. 6 is electrode body front view.
Electrical connection diagrams of the Fig. 7 between electrode pair and electrode signal controller.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the suction electrode system critical piece for human impedance imaging includes：
The electrode group of several electrode bodies composition, each electrode body are respectively arranged with：
Electrode interface is used for connection electrode body and data line；
The electrode pair being made of two symmetrical electrodes, for the measurement of contact impedance, excitation and detection electric signal；
Data line includes a plurality of conducting wire, equidistantly draws the conducting wire for connection electrode body respectively, connects each electrode
Body and electrode signal controller, are used for transmission signal；
Interface is used for connection electrode signal controller；
Electrode signal controller, is a part for entire electric impedance imaging system, and electrode signal controller is internally provided with：
Electrode data processing module, the excitation for coordination electrode and measuring state, and contact of the measuring electrode with skin
Impedance；
Alarm module connects for sending out alarm when detecting that electrode is bad with skin contact, and to medical worker's feedback
Touch undesirable electrode number；
Movable nylon tape is set on data line close near the electrode body of connector, extra not connected for fixing
The data line of electrode body.
Each electrode body is respectively connected to electrode signal controller by data line.
When mounted, when the electrode of n-th of electrode body is to detecting that electrode body has been fitted in skin surface, electrode signal control
Device processed starts coordination electrode and measures contact impedance, and when contact impedance reaches requirement, the feedback fitting of electrode signal controller is normal
Signal；If detecting, contact impedance is larger, has been more than the threshold value of setting, and electrode signal controller sends out alarm, and signal electrode needs
Again it to be bonded.Electrode signal controller is by identifying that the number of electrodes of connection determines working electrode quantity.When all electrode bodies
After absorption installs, system starts.
During the work time, the impedance measurement of electrode and excitation measurement process alternately, by electrode data processing module
The state for controlling each electrode pair, according to the excitation measurement pattern of program setting to each electrode to encouraging in order, measuring telecommunications
Number, carry out impedance measurement after each excitation measurement period.
As shown in figure 3, when connector be inserted into electrode signal controller and be powered after, according to data line setting distance by
One places electrode body on the skin, so that electrode body is adsorbed on skin surface by squeezing soft cup body, then uses movable nylon
The fixed remaining data line of band, then controls its start-up operation by the switch of system.
Electrode body describes：
Referring to fig. 4 to fig. 6, electrode body is mainly by signal processing module 2, insulating layer 3, ground plane 4, a pair of electrodes thin slice 5
It is constituted with shell 6.Wherein, 2 be signal processing module, is positioned over the upper end platform of electrode body, including electrode interface and simulation number
Word conversion circuit.Shell 6 is using soft material (such as rubber etc.), and correspondingly, layer structure is also soft material.Electrode is installed
When, gently crowded cup body makes it be adsorbed in skin surface, and test cup body is made to be in micro-vacuum state.(having adjusted sequence)
As shown in Figure 5 and Figure 6, cup body is made up of multiple layers, and external insulation layer 32 is followed successively by from outside to inside in electrode position, ground connection
Layer 4, inner insulating layer 31, electrode foil 5, shell 6.Wherein, inner insulating layer 31 coats shell and electrode foil, for ground connection to be isolated
Layer and measuring electrode sheet prevent ground plane and measuring electrode sheet short circuit；External insulation layer 32 is coated in addition to electrode and electrode at rim of a cup
Entire cup body outside interface, prevents electrode body to be connected with external circuitry, is had an impact to cup body circuit.In ground plane 4 is coated on
Outside insulating layer, the electromagnetic interference of outer bound pair electrode slice is prevented, while being prevented in the electrode slice course of work to other electrode bodies of surrounding
Electromagnetic interference.5 be a pair of electrodes thin slice, the symmetric position and wrapping portion rim of a cup of rim of a cup is attached to, referring to Fig. 4, electrode foil 5
Cup body tip platform edge is extended to, is then connect with signal processing module by conducting wire.
The port of connection electrode signal controller in need all summarize at electrode interface, and pass through connecting line and electrode
Signal controller connects；Electrode signal controller provides power supply by electrode interface to entire electrode body, makes ground plane connection electricity
Source cathode；When electrode body is as excitation electrode, system is by electrode interface to electrode to sending pumping signal.If what is measured connects
The impedance threshold that impedance is more than setting is touched, electrode signal controller, which is sent out, falls alarm signal.Simulation numeral (AD) conversion circuit
For being transmitted after electrode is converted to digital signal to the impedance value and voltage value that measure, it can be also not provided with A/D converter circuit, directly
It connects the voltage that will be measured and resistance value is transmitted with analog signal form.
Claims (2)
1. a kind of suction electrode system for human impedance imaging, including：Power supply, the electrode being made of multiple electrodes body
Group and electrode signal controller, each electrode body are connected with electrode signal controller.It is characterized in that,
Electrode body includes cup body, electrode pair and electrode interface, the cup body include successively from inside to outside shell, inner insulating layer,
Each electrode of ground plane and external insulation layer, electrode pair is fixed between the shell of cup body and inner insulating layer, from cup edge to cup
End stretch exhibition；Electrode pair and ground plane are formed by electrode interface and electrode signal controller and power supply to be electrically connected, electrode pair
Measuring signal is admitted to electrode signal controller by analog-to-digital conversion circuit；
Electrode signal controller, excitation and measuring state and coordination electrode for coordination electrode pair measure contact impedance；
The cup body is soft materials, by forming negative pressure state in the cup body of electrode body so that the rim of a cup of electrode body is inhaled
It is attached to testee surface.
2. suction electrode system according to claim 1, which is characterized in that if electrode signal controller judges electrode body
It is more than predetermined threshold value with the contact impedance of skin, then judges that electrode body is bad with skin contact, sends out alarm and feed back contact not
Good electrode number.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528479.4A CN108606791A (en) | 2018-05-29 | 2018-05-29 | A kind of suction electrode system for human impedance imaging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810528479.4A CN108606791A (en) | 2018-05-29 | 2018-05-29 | A kind of suction electrode system for human impedance imaging |
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| CN108606791A true CN108606791A (en) | 2018-10-02 |
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| CN201810528479.4A Pending CN108606791A (en) | 2018-05-29 | 2018-05-29 | A kind of suction electrode system for human impedance imaging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110811617A (en) * | 2019-11-24 | 2020-02-21 | 西北机器有限公司 | Electrical impedance tomography method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010048402A2 (en) * | 2008-10-22 | 2010-04-29 | Cornell University | Method and device for evaluation of local tissue's biological or biomechanical character |
| CN201987552U (en) * | 2011-03-03 | 2011-09-28 | 王惠新 | Adsorption electrode for electrocardiogram machine |
| CN102894975A (en) * | 2012-10-28 | 2013-01-30 | 思澜科技（成都）有限公司 | Electrode shield used for mammography |
| CN103735264A (en) * | 2013-11-25 | 2014-04-23 | 北京华健恒创技术有限公司 | Whole-breast electric impedance examination electrode |
| CN106361335A (en) * | 2016-11-04 | 2017-02-01 | 杭州永川科技有限公司 | Electrical impedance signal collecting device |
| CN106618569A (en) * | 2016-11-10 | 2017-05-10 | 中国人民解放军第四军医大学 | Measuring device and method for contact impedance between electrodes and skin |
-
2018
- 2018-05-29 CN CN201810528479.4A patent/CN108606791A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010048402A2 (en) * | 2008-10-22 | 2010-04-29 | Cornell University | Method and device for evaluation of local tissue's biological or biomechanical character |
| CN201987552U (en) * | 2011-03-03 | 2011-09-28 | 王惠新 | Adsorption electrode for electrocardiogram machine |
| CN102894975A (en) * | 2012-10-28 | 2013-01-30 | 思澜科技（成都）有限公司 | Electrode shield used for mammography |
| CN103735264A (en) * | 2013-11-25 | 2014-04-23 | 北京华健恒创技术有限公司 | Whole-breast electric impedance examination electrode |
| CN106361335A (en) * | 2016-11-04 | 2017-02-01 | 杭州永川科技有限公司 | Electrical impedance signal collecting device |
| CN106618569A (en) * | 2016-11-10 | 2017-05-10 | 中国人民解放军第四军医大学 | Measuring device and method for contact impedance between electrodes and skin |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110811617A (en) * | 2019-11-24 | 2020-02-21 | 西北机器有限公司 | Electrical impedance tomography method |
| CN110811617B (en) * | 2019-11-24 | 2023-10-31 | 西北机器有限公司 | Electrical impedance tomography method |
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