CN115005797A - Electrical impedance tomography imaging system and imaging method - Google Patents

Abstract

The present disclosure provides an imaging system of an electrical impedance tomography, comprising an electrode belt, a processing module, a display module; the electrode strip is configured to be arranged in a target area of a target object to detect an electric signal of the target area, the electrode strip comprises a base band and a plurality of electrode plates which are arranged on the base band and connected with conductive wires, each electrode plate is provided with a first electrode surface in contact with the base band and a second electrode surface opposite to the first electrode surface, the second electrode surface is sequentially provided with sticky conductive adhesive and release films in a multi-layer folding structure, and the release films of adjacent electrode plates in the plurality of electrode plates are connected through a connecting structure; the processing module is configured to receive the electrical signals and obtain electrical impedance images based on the electrical signals; the display module is configured to display the electrical impedance image. Therefore, the imaging system of the electrical impedance tomography is convenient to operate and capable of improving the measurement stability and accuracy.

Description

Electrical impedance tomography imaging system and imaging method

Technical Field

The present disclosure relates to the field of medical imaging systems, and in particular, to an electrical impedance tomography imaging system and an electrical impedance tomography imaging method.

Background

Electrical Impedance Tomography (EIT) is a method of measuring a response Electrical signal outside a living body by applying a safety Electrical excitation to the living body with Electrical Impedance change distribution of tissues and organs of the living body as an imaging target, and reconstructing an Electrical Impedance change distribution image inside the living body based on the obtained Electrical signal. Different from traditional CT, ultrasonic, nuclear magnetic resonance and other methods, the electrical impedance tomography is simple and easy to carry, realizes nondestructive imaging, and has the obvious development advantages of low cost and high safety.

The Chinese patent with the publication number of CN 211213147U and the patent name of 'an electrode belt for electrical impedance tomography data acquisition' discloses an electrode belt for electrical impedance tomography data acquisition, which comprises a rubber binding belt, a plurality of conductive rubber blocks which are uniformly distributed along the length direction of the rubber binding belt and extend out of the rubber binding belt, and a metal conductive connector connected with the conductive rubber blocks, wherein one end of the rubber binding belt is provided with a plurality of clamping holes, the other end of the rubber binding belt is provided with a clamping buckle bulge clamped in the clamping holes, the number of the conductive rubber blocks is equal to that of the metal conductive connectors, and the number of the conductive rubber blocks is even.

Due to the adoption of the structure, when the electrode belt is worn, in order to ensure that the conductive rubber block is in full contact with the skin on the body surface of the target object, the rubber binding belt must be tightly bound on the target area of the target object through external binding force, so that the use experience is influenced. And the electrode belt deviates from the target area due to the body movement of the target object or the movement between the body surface skin and the rubber binding belt caused by the clinical operation of medical care, so that the stability and the accuracy of measurement are reduced.

Disclosure of Invention

The present disclosure has been made in view of the above circumstances, and an object thereof is to provide an electrical impedance tomography imaging system and an electrical impedance tomography imaging method which are convenient to operate and can improve measurement stability and accuracy.

To this end, the present disclosure provides an electrical impedance tomography imaging system, including an electrode strip, a processing module, and a display module, where the electrode strip is configured to be disposed in a target region of a target object to detect an electrical signal of the target region, the electrode strip includes a base band and a plurality of electrode sheets disposed on the base band and connected with a conductive wire, the electrode sheets have a first electrode surface contacting with the base band and a second electrode surface opposite to the first electrode surface, the second electrode surface is sequentially disposed with a sticky conductive adhesive and a release film in a multi-layer folded structure, and the release films of adjacent electrode sheets in the plurality of electrode sheets are connected by a connection structure; the processing module is configured to receive the electrical signals and obtain electrical impedance images based on the electrical signals; the display module is configured to display the electrical impedance image.

Under the circumstances, not only provided from beginning to measure to finally form images a set of complete imaging system, and because the electrode belt has adopted the design of conducting resin and multilayer release film, particularly, cover the conducting resin earlier on the electrode sheet of electrode belt, utilize the viscidity of conducting resin, make the electrode sheet can form stable contact with the skin of target object's target area, and need not to fix the electrode belt to target object's target area through external force, simultaneously, can utilize the release film that covers at the conducting resin to keep the viscidity of conducting resin, the release film that has double-deck beta structure simultaneously is favorable to tearing off the release film through the mode of pull conveniently, thereby make the electrode belt guarantee the stability and the accuracy of measuring the signal of telecommunication again when wearing convenient.

In the imaging system according to the present disclosure, the base tape may be an elastic multilayer structure for housing the conductive wire. In this case, the base band has elasticity and adopts a double-layer structure, so that the electrode band is not only tough and durable, but also can be worn by target objects with different sizes. Meanwhile, the conducting wire does not leak outwards, so that the safety of the electrode belt in use is ensured.

In the imaging system related to in this disclosure, optionally, the release film includes a first film layer attached to the conductive adhesive and a second film layer attached to the first film layer, and the first film layer and the second film layer cooperate to form a double-layer folding structure. Under this condition, owing to adopted double-deck beta structure from the type membrane, not only covered the conducting resin, made the conducting resin not expose in the air and cause the conducting resin to pollute or be stained with east and west easily, in addition after electrode belt location target area, tear the second rete with the mode of pull earlier, rethread second rete drives first rete for peel off the conducting resin from type membrane whole fast.

In an imaging system to which the present disclosure relates, optionally, at least a portion of the second film layer is exposed outside an edge of the base tape, the second film layer exposed outside the edge of the base tape being printed with indicia indicating a direction. In this case, the second film layer exposed outside the edge of the base tape can be used to find the force point for tearing off the release film, and the release film can be torn off conveniently and completely under the guidance of the indication direction. In addition, if the connecting structure of the release film covered on two adjacent electrode sheets is broken due to unexpected reasons, the second film layer exposed outside the edge of the base band can be found from the broken part, and the release film covered on the adjacent electrode sheet is pulled under the guidance of the indication direction, so that the release film and the electrode sheet are peeled.

In the imaging system to which the present disclosure relates, optionally, in the adjacent electrode sheets, the connection structure includes a first end portion connected to the first film layer of one electrode sheet and a second end portion connected to the first film layer of the other electrode sheet. Under the condition, the release film on a single electrode plate can be torn off, so that the release film on the next connected electrode plate can be driven to strip the conductive adhesive in a series connection mode through the connecting structure, and finally, all the release films on the electrode belt can be torn off conveniently and completely.

In an imaging system to which the present disclosure relates, optionally, the connecting structure is an S-shaped structure. Under the condition, the continuity of the S-shaped connecting structure can effectively ensure that the release film on the adjacent electrode plate can not be easily broken when being stripped from the conductive adhesive.

In the imaging system according to the present disclosure, optionally, the electrode sheet is a metal electrode sheet, and a material plated on a surface of the metal electrode sheet is at least one of silver or silver chloride. In this case, since the contact resistance of the silver or/and silver chloride electrode sheet with the target region of the target object is small, the stability and accuracy of the measurement of the electric signal can be ensured.

The imaging system related to the present disclosure optionally further includes a portable data acquisition device, where the portable data acquisition device is configured to store the electrical signal data detected by the electrode strip, and transmit the electrical signal data to the processing module in a wireless transmission manner. In this case, the measured electrical signals are transmitted by wireless transmission, which not only has a fast transmission speed, but also is not limited by the distance of the general environment. Because the portable data acquisition device has the function of storing electric signal data, even if the instant communication can not be realized on site, the stored electric signal data can be independently transmitted to the processing module for analysis and processing.

In addition, a second aspect of the present disclosure provides an electrical impedance tomography imaging method, including the steps of: positioning an electrode strip to a target area of a target object, wherein the electrode strip comprises a base band and a plurality of electrode plates which are arranged on the base band and connected with conductive wires, the electrode plates are provided with a first electrode surface contacted with the base band and a second electrode surface opposite to the first electrode surface, the second electrode surface is sequentially provided with sticky conductive adhesive and release films in a multi-layer folding structure, and the release films of adjacent electrode plates in the plurality of electrode plates are connected through a connecting structure; stripping the release film of at least one electrode plate, and stripping the residual release film of the electrode plate by using the connecting structure; fixing the electrode plate in the target area through the conductive adhesive; detecting an electrical signal using the electrode pad; electrical impedance images are obtained based on the electrical signals.

Under the circumstances, not only provided from beginning to measure to finally form images a set of complete imaging system, and because the electrode belt has adopted the design of conducting resin and multilayer release film, particularly, cover the conducting resin earlier on the electrode sheet of electrode belt, utilize the viscidity of conducting resin, make the electrode sheet can form stable contact with the skin of target object's target area, and need not to fix the electrode belt to target object's target area through external force, simultaneously, can utilize the release film that covers at the conducting resin to keep the viscidity of conducting resin, the release film that has double-deck beta structure simultaneously is favorable to tearing off the release film through the mode of pull conveniently, thereby make the electrode belt guarantee the stability and the accuracy of measuring the signal of telecommunication again when wearing convenient.

In the imaging method according to the present disclosure, optionally, the base tape has a first base tape surface contacting the electrode sheet and a second base tape surface opposite to the first base tape surface, and the second base tape surface is provided with an identification pattern for positioning the electrode tape to the target area. In this case, the electrode strips can be quickly and accurately positioned to the target area of the target object for detection of the electric signals by the identification pattern on the second base band surface.

According to the imaging system and the imaging method of the electrical impedance tomography, the operation is convenient, and the measurement stability and accuracy can be improved.

Drawings

Fig. 1 is a schematic view showing an application scenario of an electrical impedance tomography imaging system to which an example of the present disclosure relates.

Fig. 2 is a schematic diagram illustrating an application scenario of another embodiment of an electrical impedance tomography imaging system according to an example of the present disclosure.

Fig. 3 is a schematic diagram of an imaging system illustrating electrical impedance tomography to which examples of the present disclosure relate.

Fig. 4a is a schematic front view showing an electrode tape without a release film being peeled off according to an example of the present disclosure.

Fig. 4b is an enlarged schematic view of region a in fig. 4a illustrating the present disclosure.

Fig. 5 is a schematic front view showing an electrode tape after a release film is peeled off according to an example of the present disclosure.

Fig. 6 is a schematic backside view showing an electrode belt according to an example of the present disclosure.

Fig. 7a is a schematic diagram illustrating a base tape, an electrode sheet, and a release film according to an example of the present disclosure.

Fig. 7b is a schematic diagram illustrating a base tape, an electrode sheet, a conductive paste, and a release film according to an example of the present disclosure.

Fig. 8 is a schematic view showing a release film of a double-layer folding structure according to an example of the present disclosure.

Fig. 9 is a schematic view illustrating another embodiment of a connection structure of a release film of a double-folded structure according to an example of the present disclosure.

Fig. 10 is a flow chart illustrating an electrical impedance tomography method to which examples of the present disclosure relate.

Detailed Description

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, the same components are denoted by the same reference numerals, and redundant description thereof is omitted. The drawings are schematic and the ratio of the dimensions of the components and the shapes of the components may be different from the actual ones.

In addition, the headings and the like referred to in the following description of the present disclosure are not intended to limit the content or scope of the present disclosure, but merely serve as a reminder for reading. Such a subtitle should neither be understood as a content for segmenting an article, nor should the content under the subtitle be limited to only the scope of the subtitle.

An imaging system for electrical impedance tomography may include an electrode belt configured as an electrical signal data acquisition device, a processing module configured to receive electrical signals and obtain electrical impedance images based on the electrical signals, and a display module configured to display the electrical impedance images. In this case, with the electrical impedance tomography imaging system of the present disclosure, by detecting, acquiring, analyzing and processing an electrical signal for a target region of a target object, an electrical impedance change distribution image of the target region can be finally generated and displayed by the display module. Meanwhile, the electrode belt adopts a structure that the surface of the electrode plate is sequentially covered with the conductive adhesive and the release film, so that the electrode plate can be ensured to be in stable contact with the skin of a target object while the electrode belt is worn conveniently, the stability of an electric signal in the acquisition process can be ensured, and the final imaging result is accurate and reliable. Compared with the traditional methods such as CT, ultrasound, nuclear magnetic resonance and the like, the system is simple and easy to carry, realizes nondestructive imaging and ensures the safety of long-term use.

The present disclosure also provides an electrical impedance tomography imaging method, in which electrical signals of a target region of a target object can be detected, collected, analyzed, and processed, and an electrical impedance tomography image is finally displayed. Because the electrode belt as the electric signal acquisition device adopts a new design structure, and the electrode belt is conveniently worn and simultaneously can ensure that the electrode plate and the body surface skin of a target object form stable contact by utilizing the structure that the surface of the electrode plate is sequentially covered with the conductive adhesive and the release film, the stability of the electric signal in the acquisition process can be ensured, and the final measurement result is accurate and reliable.

Fig. 1 is a schematic view showing an application scenario of an electrical impedance tomography imaging system to which an example of the present disclosure relates. Fig. 2 is a schematic diagram illustrating an application scenario of another embodiment of an electrical impedance tomography imaging system according to an example of the present disclosure. Fig. 3 is a schematic diagram of an imaging system showing electrical impedance tomography to which examples of the present disclosure relate.

The embodiment of the present disclosure relates to an electrical impedance tomography imaging system 1, in the present embodiment, referring to fig. 1, 2 and 3, the electrical impedance tomography imaging system 1 may include an electrode belt 20, a processing module 30 and a display module 40, the electrode belt 20 being configured to be disposed at a target region of a target object 10 to detect an electrical signal of the target region; the processing module 30 is configured to receive the electrical signals and obtain electrical impedance images based on the electrical signals; the display module 40 is configured to display electrical impedance images.

In this embodiment, the target object 10 may include a human body or other animal body, and the target region may include a chest or a head. In some examples, the target object 10 may also be an object for which electrical impedance tomography images need to be measured.

In the present embodiment, the electrical signal may include a voltage signal or a current signal, and specifically, if the excitation source applied to the target region of the target object 10 is a constant current source, the electrical signal detected by the electrode belt 20 is a voltage signal; if the excitation source applied to the target area of the target object 10 is a constant voltage source, the electrical signal detected by the electrode strips 20 is a current signal.

Fig. 4a is a schematic front view showing an electrode tape without a release film being peeled off according to an example of the present disclosure. Fig. 4b is an enlarged schematic view of region a in fig. 4a illustrating the present disclosure. Fig. 5 is a schematic front view showing an electrode tape after a release film is peeled off according to an example of the present disclosure. Fig. 6 is a schematic backside view showing an electrode belt according to an example of the present disclosure. Fig. 7a is a schematic diagram illustrating a base tape, an electrode sheet, and a release film according to an example of the present disclosure. Fig. 7b is a schematic diagram illustrating a base tape, a conductive paste, an electrode sheet, and a release film according to an example of the present disclosure.

In some examples, the electrode belt 20 may be configured to be disposed at a target region of the target object 10 to detect an electrical signal of the target region. In this case, the electrode belt 20 can detect target objects 10 of different sizes.

In some examples, referring to fig. 4a and 5, the electrode belt 20 may include a base belt 203 and an electrode sheet 207 disposed on the base belt 203.

In some examples, a conductive wire may be connected to the electrode pad 207. Thus, the electrode pads 207 can transmit the detected electrical signals to the processing module 30.

In some examples, the electrode belt 20 may include a plurality of electrode sheets 207. In this case, when the electrode belt 20 is worn, the plurality of electrode pads 207 may be fixed to the target region of the target object 10 at one time, and each electrode pad 207 may be located on the surface of the same slice of the target region, which is very advantageous for reconstructing an electrical impedance tomography image.

In some examples, the electrode sheet 207 may have a first electrode face in contact with the base tape 203 and a second electrode face opposite the first electrode face. In some examples, the second electrode face may be in contact with the conductive paste 208.

In some examples, referring to fig. 7a and 7b, the second electrode face may be sequentially provided with a conductive paste 208 having adhesion and a release film 204 in a multi-layered folded structure.

In some examples, referring to fig. 4a, the release films 204 of adjacent electrode pads 207 among the plurality of electrode pads 207 may be connected by a connection structure 205.

In some examples, the two ends of the electrode belt 20 may be respectively provided with a snap-fit device that locks with each other. In this case, after the electrode belt 20 is positioned to the target region of the target object 10, the electrode belt 20 may be preliminarily fixed to the target region of the target object 10 using the snap-fit device.

In addition, in some examples, the two ends of the electrode belt 20 may also be respectively provided with mutually-matched knob devices. In this case, after the electrode belt 20 is positioned to the target region of the target object 10, the electrode belt 20 may be preliminarily fixed to the target region of the target object 10 using the knob device.

In some examples, the base band 203 may be in the shape of a belt, and two ends of the base band 203 may be respectively provided with a locking device. In this case, the electrode belt 20 may be preliminarily fixed to the target area using the snap-fit means of the base belt 203.

In some examples, the base tape 203 may be a multi-layer structure having elasticity, and specifically, the material of the base tape 203 is an elastic insulating material, for example, one or a combination of at least two of elastic silicone, elastic belt, or elastic fabric may be used. In this case, on one hand, the base band 203 has elasticity, so that the electrode band 30 has the expansion and contraction characteristic, thereby being suitable for wearing and using of different target objects 10; on the other hand, the base tape 203 is made of an insulating material, and thus does not interfere with the detection of the electrical signal by the electrode pad 207.

In some examples, the base tape 203 of a multi-layer structure may be used to incorporate a conductive wire, thereby ensuring safety when using the electrode tape 20.

In some examples, the base band 203 may be sewn with two layers of cotton fibers having uniform elasticity and no harm to the human body. In this case, the base band 203 does not cause skin allergy by contacting the body surface skin.

In some examples, the length of the conductive wire connected to the electrode pad 207 may be left with a margin, and specifically, the maximum length of the conductive wire may be determined according to the maximum elastic elongation of the base tape 203, and specifically, the maximum elastic elongation of the base tape 203 may be an elongation of the base tape 203 in a tensioned state. In this case, the electrode belt 20 is capable of measuring target objects 10 of different sizes.

In some examples, the base tape 203 may have a first base tape surface 203a in contact with the electrode pad 207 and a second base tape surface 203b opposite the first base tape surface 203 a.

In some examples, referring to fig. 6, the second baseband surface 203b is provided with an identification pattern 202. In some examples, the identification pattern 202 may be used to accurately position the electrode belt 20 to a target area of the target object 10.

In some examples, the identification pattern 202 of the second baseband face 203b may include a number 202a and a chevron pattern 202 b.

In some examples, the humanoid pattern 202b may include a front image and a back image, in which case the humanoid pattern 202b can be used to aim at a particular location of the target region of the target object 10 (e.g., a location between the 4 th and 5 th ribs in the middle of the human thorax), in other words, the humanoid pattern 202b can assist the electrode belt 20 in accurately positioning the target region of the target object 10.

In some examples, each number 202a may correspond one-to-one to each electrode sheet 207 to which the first base tape surface 203a is fixed, thereby being equivalent to providing each electrode sheet 207 with one number, in other words, the number of the number 202a may be the same as the number of the electrode sheets 207. In some examples, the number 202a may include 1 to 16, for a total of 16 numbers, i.e., corresponding to 16 electrode pads 207. In this case, the electrode pads 207 can be numbered, and at the same time, whether each numbered electrode pad 207 is located at an appropriate position can be determined from an electrical impedance tomography image obtained subsequently, so that the corresponding electrode pad 207 can be adjusted.

In some examples, the electrode pad 207 may be a metal electrode pad. In some examples, electrode pads 207 may be made of metallic copper. In addition, in some examples, at least one of metal silver or silver chloride can be electroplated on the surface of the metal electrode plate, and when the metal silver or the silver chloride is in contact with electrolytes such as physiological saline, the speed of chloride ions entering and exiting the silver chloride layer is relatively high, and the balance is also fast, so that the formed balanced electrode potential is stable, and the anti-interference capability is strong.

In some examples, the electrode pads 207 may be disposed on the base tape 203 in a uniformly distributed manner, and the shape of the electrode pads 207 may be rectangular, oval, or circular.

In some examples, the number of electrode pads 207 may be an even number, 10 to 32 (see fig. 5). In this case, the number of the electrode pads 207 is even, and it is advantageous to reconstruct an electrical impedance tomography image by alternately exciting adjacent or opposite two electrode pads 207 and measuring electrical signals between the remaining electrode pads 207.

In some examples, the number of the conductive wires may be the same as the number of the electrode pads 207, and one end of each conductive wire is connected to the corresponding electrode pad 207 by welding or plugging, the other end of each conductive wire is connected to a cable extending along the length direction of the electrode strip 20, the other end of each cable may be connected to a plug, and the cable and the plug may be concealed inside the base tape 203. This ensures the safety of the electrode belt 20 during use.

In some examples, the electrode pad 207 may be fixed to the first base tape surface 203a of the base tape 203 along the length direction of the base tape 203, and the electrode pad 207 may be flush with the first base tape surface 203a or may protrude from the first base tape surface 203 a. In this case, the electrode sheet 207 can be ensured to be sufficiently in contact with the body surface skin of the target region.

In some examples, the electrode sheet 207 may be fixed to the base tape 203 in a sticking manner along a length direction of the base tape 203, and specifically, the base tape 203 may be uniformly provided with a plurality of grooves in which the electrode sheet 207 is stuck. In this case, not only is the stability of the connection of the electrode pad 207 with the base tape 203 ensured, but also the replacement of the damaged electrode pad 207 is facilitated.

In addition, in some examples, the electrode pad 207 is fixed on the base tape 203 in an embedded manner along the length direction of the base tape 203, specifically, a plurality of card slots may be uniformly distributed on the base tape 203, and the electrode pad 207 may be embedded in the card slots.

In some examples, when the electrode sheet 207 is loosened or displaced during the process of detecting the electrical signal of the target area by using the electrode strip 20, the processing module 30 may calculate the contact impedance between the electrode sheet 207 and the target area, and if the contact impedance exceeds a set threshold, the processing module 30 may prompt the user to adjust the electrode strip 20 by using a corresponding electrode status indicator or indicator lamp on the display module 40, so as to ensure that each electrode sheet 207 can form a stable contact with the skin of the target area of the target object 10. In some examples, electrode patch 207 is in stable contact with the skin of the target area, and the corresponding electrode status indicator or indicator light on display module 40 is green; the electrode sheet 207 is loosened or displaced, and the corresponding electrode status indicator or indicator light on the display module 40 is red.

In some examples, the electrode pads 207 may be provided with a sensing unit, so that, when the electrode pads 207 are loosened or displaced during the process of detecting the electrical signal of the target area by using the electrode strips 20, the sensing unit may send an alarm signal to the processing module 30, and the processing module 30 prompts a user to adjust the electrode strips 20 through corresponding electrode status indicators or indicator lamps on the display module 40, so as to ensure that each electrode pad 207 can be stably contacted with the skin of the target area of the target object 10. In some examples, electrode patch 207 is in stable contact with the skin of the target area, and the corresponding electrode status indicator or indicator light on display module 40 is green; the electrode sheet 207 is loosened or displaced, and the corresponding electrode status indicator or indicator light on the display module 40 is red.

In some examples, the electrode pad 207 may be provided with a sensing unit, which may include an indicator light that may display the current state of the electrode pad 207. In this case, when the electrode strip 20 is used to detect an electrical signal, the electrode sheet 207 is stably in contact with the skin of the target area, and the indicator light is on green; the electrode sheet 207 comes into contact with the skin of the target area and becomes loose or displaced, and the indicator lights up red.

In some examples, the conductive paste 208 is a gel-like polymer containing a humectant and an electrolyte, and has characteristics such as adhesiveness, drying resistance, and high conductivity. The conductive adhesive 208 is used as a fusion agent between the electrode plate 207 and the body surface of the target area, the adhesion of the conductive adhesive 208 can enable the electrode plate 207 to be in stable contact with the body surface of the target area, and displacement or collapse between the body surface and the electrode plate 207 caused by body movement can be avoided or reduced; the drying resistance of the conductive adhesive 208 can ensure that the electrode plate 207 is not fallen off or displaced after being contacted with the body surface of the target area for a long time; the high conductivity of the conductive adhesive 208 can ensure that the contact impedance between the electrode pad 207 and the body surface of the target region is small enough, so that the electrical signal measured by the electrode pad 207 is accurate and stable.

In some examples, the conductive adhesive 208 may include a conductive gel, a pressure sensitive conductive adhesive, or a pre-set conductive adhesive.

In some examples, the conductive gel 208 may be a conductive gel for measuring an electrocardiogram, which is a fusion agent between the electrode pad 207 and the body surface skin of the target region, and not only has strong adhesion to enable the electrode pad 207 to be stably attached to the body surface of the target region, but also has good conductivity to enable the ionic current of the living body to rapidly pass through the conductive gel to reach the electrode pad 207, so that the electrical signal measured by the electrode pad 207 is accurate and stable.

In some examples, referring to fig. 7a and 7b, the conductive paste 208 is distributed in a shape similar to the electrode pad 207, and the conductive paste 208 is distributed in an area having a size similar to the electrode pad 207. In this case, the conductive paste 208 can be made to exert its adhesive function better.

Fig. 8 is a schematic view showing a release film of a double-layer folding structure according to an example of the present disclosure. Fig. 9 is a schematic view illustrating another embodiment of a release film attachment structure of a double-layer folding structure according to an example of the present disclosure.

In some examples, the release film 204 may be a film with a surface having separability, and specifically, the release film 204 may be a film formed by uniformly coating a silicone oil or a silicone release agent on a surface layer of an environmentally friendly PET, PE, or OPP film.

In some examples, the release film 204 may have a characteristic of exhibiting a slight and stable release force after being bonded with certain adhesive materials, such as conductive glue. In this case, the release film 204 can form a stable fit with the conductive adhesive 208, thereby protecting the conductive adhesive 208 from being contaminated by exposure to air; when the release film 204 is pulled manually, the release film 204 can be separated from the conductive adhesive 208 quickly and cleanly.

In some examples, referring to fig. 8, release film 204 may have better softness and toughness. In this case, manually tearing the release film 204 does not cause the connection structure 205 between the adjacent release films 204 to be broken.

In some examples, release film 204 may be a double-sided release film or a single-sided release film, i.e., a release film that is coated on one side with a silicone release agent. It should be noted that, when the release film 204 is a single-sided release film, the side of the single-sided release film coated with the silicone release agent directly contacts the conductive adhesive 208.

In some examples, the release film 204 may have a thickness of 0.019mm, 0.025mm, 0.036mm, 0.05mm, 0.075mm, 0.1mm, 0.125mm, 0.175mm, or 0.188 mm.

In some examples, release film 204 can be a red release film, a yellow release film, a green release film, a blue release film, a milky release film, a yellow release film, a matte release film, a pearlescent release film, a black release film, a transparent release film, a translucent release film, or a ceramic white release film.

In some examples, the release film 204 may be antistatic treated. In this case, static charges accumulated on the surface of the release film 204 are eliminated, and electrostatic breakdown of the circuit inside the electrode sheet 207 can be effectively prevented.

In some examples, the shape of the first film layer 204a may match the shape of the conductive paste 208 covering the electrode sheet 207. Specifically, the shape of the first film layer 204a is similar to the shape of the conductive paste 208, and the area of the first film layer 204a is equal to or larger than the area of the conductive paste 208. In this case, the first film layer 204 can form a stable fit with the conductive adhesive 208, which is beneficial to maintain the viscosity of the conductive adhesive 208.

In some examples, referring to fig. 7b and 8, the release film 204 may include a first film layer 204a attached to the conductive paste 208 and a second film layer 204b attached to the first film layer 204a, and the first film layer 204a and the second film layer 204b cooperate to form a double-layer folded structure.

In some examples, at least a portion of the second film layer 204b of the release film 204 is exposed outside the edge of the base tape 203. In this case, the point of application of force of the release film 204 can be found by the second film layer 204b exposed outside the edge of the base tape 203, and it should be noted that the point of application of force can also be referred to as a point of application of force or a point of application of force.

In some examples, the second film layer 204b, which is exposed outside the edges of the base tape 203, is printed with indicia 206 indicating the direction. In this case, the release film 204 can be easily torn off as directed by the indicator 206 indicating the direction.

In some examples, if the connecting structure 205 of the release film 204 covered on one of the two connected electrode pads 207 is broken due to some unexpected reason, the second film layer 204b exposed outside the edge of the base tape 203 can be found from the broken part, and the release film 204 covered on the adjacent electrode pad 207 is pulled under the guidance of the indicator 206 indicating the direction, so as to peel the release film 204 from the conductive adhesive 208.

In some examples, the area of the first film layer 204a of the release film 204 is larger than the area of the electrode pad 207 corresponding thereto. In this case, it is advantageous that the first film layer 204a completely covers the conductive paste 208 on the electrode sheet 207.

In some examples, the release film 204 may have a multi-layer folding structure, for example, the release film 204 may have a three-layer folding structure, and specifically, a third film layer connected to the first film layer 204a is further attached between the first film layer 204a and the conductive adhesive 208, so that the release film 204 having the three-layer folding structure can also function as the release film 204 having the two-layer folding structure. By analogy, the release film 204 can be set to be a four-layer folding structure or a five-layer folding structure.

Fig. 8 is a schematic view showing a release film of a double-layer folding structure according to an example of the present disclosure. Fig. 9 is a schematic view illustrating another embodiment of a release film attachment structure according to an example of the present disclosure.

In some examples, referring to fig. 8, when the release film 204 is torn off, the next release film 204 is driven by the connecting structure 205 to strip off the electrode sheet 207. Specifically, the electrode tabs 207 can be peeled off at one time from the release film 204 covering all the electrode tabs 207 in a serial manner by the connection structure 205.

In some examples, referring to fig. 8, in the adjacent electrode sheets 207, the connection structure 205 may include a first end connected to the first film layer 204a of the electrode sheet 207 and a second end connected to the first film layer 204a of the other electrode sheet 207, and the connection structure 205 may have an S-shaped structure.

In some examples, in adjacent electrode sheets, the S-shaped structure connection structure 205 may include a first end connected to the first film layer 204a of an electrode sheet 207 and a second end connected to the second film layer 204b of another electrode sheet 207. In this case, pulling the second film layer 204b of one electrode sheet 207 can drive the first film layer 204a of the adjacent electrode sheet 207 to peel off the electrode sheet 207, so as to achieve the purpose of quickly peeling off the electrode sheet 207 from the release film 204.

In some examples, referring to fig. 9, the release films 204 covered on adjacent electrode pads 207 among the plurality of electrode pads 207 are connected by a connection structure 205, and the connection structure 205 may be an X-shaped structure. In this case, the robustness of the connection structure 205 is increased due to the symmetry of the connection structure 205 along the length of the electrode strip 20.

In some examples, the processing module 30 configured to receive the electrical signals and obtain electrical impedance images based on the electrical signals may include a printed circuit board of peripheral circuits such as a gain configuration circuit with a programmable gain amplifier, an electrical impedance tomography chip, a universal serial bus, and a computer. In some examples, the processing module 30 has a function of restoring the electrical signal information acquired in one cycle to one frame image through processing.

In some examples, the display module 40 configured to display electrical impedance images may include custom software, and a computer display, dedicated to reconstructing and displaying electrical impedance tomography images of the target region.

In some examples, the electrical impedance tomography imaging system 1 described above may further include a portable data acquisition device 50.

In some examples, the portable data acquisition device 50 may be used to store electrical signal data detected by the electrode strips 20 and transmit the electrical signal data to the processing module 30 by wireless transmission. In this case, the transmission speed is fast and is not limited by the distance of the general environment.

In some examples, the portable data collection device 50 may be a data collection box, and optionally, the data transmission mode further includes the data collection box storing the electrical signal data detected by the electrode strips 20 before transmitting the electrical signal data to the processing module 30. Since the data collection box has the storage function, even if instant communication cannot be realized on site, the stored electric signal data can be transmitted to the processing module 30 for analysis processing (see fig. 2).

In some examples, the portable data acquisition device 50 may also transmit the electrical signal data detected by the electrode strips 20 to the processing module 30 in a wired manner.

In some examples, referring to fig. 2, the portable data acquisition device 50 may be secured to the electrode belt 20 in an overhung manner, in which case, the portable data acquisition device 50 is easily installed and removed.

As mentioned above, the present disclosure also relates to an imaging method of electrical impedance tomography, which can be implemented by the imaging system 1 of electrical impedance tomography to which the present disclosure relates.

Fig. 10 is a flow chart diagram illustrating an electrical impedance tomography imaging method according to an example of the present disclosure.

In some examples, referring to fig. 10, in the present embodiment, the imaging method may include the steps of: positioning the electrode belt 20 to a target region of the target object 10 (step S100); peeling the release film 204 of at least one electrode sheet 207 (step S200); fixing the electrode belt 20 to the target area by the conductive adhesive 208 (step S300); detecting an electric signal using the electrode pad 207 (step S400); an electrical impedance image is obtained based on the electrical signal (step S500).

In step S100 of the present embodiment, the electrode strip 20 may include a base tape 203 and a plurality of electrode pads 207 disposed on the base tape 203 and connected with conductive wires, the electrode pads 207 have a first electrode surface contacting the base tape 203 and a second electrode surface opposite to the first electrode surface, the second electrode surface is sequentially provided with a sticky conductive adhesive 208 and a release film 204 having a multi-layer folding structure, and the release films 204 of adjacent electrode pads 207 of the plurality of electrode pads 207 are connected by a connection structure 205. In some examples, the electrode belt 20 used in the imaging process may be the same as the electrode belt 20 described above.

In some examples, the base tape 203 may have a first base tape surface 203a in contact with the electrode sheet 207 and a second base tape surface 203b opposite to the first base tape surface 203a, the second base tape surface 203b being provided with an identification pattern 202 (see fig. 6), the identification pattern 202 being used to accurately position the electrode tape 20 to a target area of the target object 10.

In some examples, the electrode belt 20 may be initially fixed to the target area of the target object 10 by the fastening devices respectively disposed at the two ends of the electrode belt 20, and then the electrode belt 20 is adjusted to be accurately positioned to the target area of the target object 10 according to the identification pattern 202.

In some examples, the identification pattern 202 of the second baseband face 203b may include a number 202a and a chevron pattern 202 b. The human-shaped pattern 202b may include a front image and a back image. In this case, the human-shaped pattern 202b can be used to aim at a specific position of the target region of the target object 10 (e.g., a position between the 4 th and 5 th ribs in the middle of the thoracic cavity of the human body), in other words, the human-shaped pattern 202b can assist the electrode strips 20 in accurately positioning the target region of the target object 10.

In some examples, each number 202a may correspond one-to-one with each electrode pad 207 secured to the first baseband surface 203a, thereby equivalently providing each electrode pad 207 with a number. In this case, whether the electrode sheet 207 of each number is located at an appropriate position can be determined according to the imaging result of the electrical impedance tomography image obtained subsequently, and the corresponding electrode sheet 207 can be adjusted.

In some examples, the target object 10 may comprise a human or other animal body, and the target region may comprise a chest or head portion or the like.

As described above, in step S200 of the present embodiment, the release film 204 of at least one electrode pad 207 may be peeled off according to the mark 206 on the release film 204, and the release films 204 on the remaining electrode pads 207 may be peeled off in series by using the connection structure 205 between the adjacent release films 204, so that the release films 204 on all the electrode pads 207 may be peeled off at one time.

In some examples, the elasticity of the base tape 203 can be utilized to lift the electrode tape 20 to be peeled off from the release film 204, and the mark 206 is used to pull at least a portion of the second film layer 204b of the release film 204 exposed outside the edge of the base tape 203, so that the release film 204 can be peeled off from the electrode sheet 207.

In some examples, if the connecting structure 205 of the release film 204 covering the two electrode sheets 207 connected to each other is broken due to an unexpected reason, the release film 204 covering the next electrode sheet 207 may be pulled out from the broken position, in which case, the release films 204 covering all the electrode sheets 207 can be easily peeled off from the electrode sheets 207 (i.e., the release films 204 peel off the electrode strips 20).

In some examples, the electrode strips 20 may be single-use electrode strips, in which case, since the electrode strips 20 are single-use, it can be ensured that cross-contamination due to the use of the same electrode strip by different target objects 10 is not caused.

In some examples, the release film 204 may be adhered back into place after the same target object 10 has used the electrode strips 20. In this case, repeated use of the electrode belt 20 can be realized.

As described above, in step S300 of the present embodiment, the electrode sheet 207 may be fixed to the target region by the conductive adhesive 208. In some examples, the conductive paste 208 is a gel-like polymer containing a humectant and an electrolyte, and has characteristics such as adhesiveness, drying resistance, and conductivity. The adhesiveness can stably fix the electrode sheet 207 on the body surface skin of the target object 10, can avoid or alleviate displacement or looseness of the body surface skin and the electrode sheet 207 caused by body movement, and ensure the stability of detecting the contact impedance between the body surface skin and the electrode sheet 207, thereby ensuring the stability and accuracy of imaging.

As described above, in step S400 of the present embodiment, the electrode pad 207 is used to detect an electrical signal, which may include a voltage signal or a current signal, and specifically, if the excitation source applied to the target region of the target object 10 is a constant current source, the electrical signal detected by the electrode pad 207 is a voltage signal; if the excitation source applied to the target region of the target object 10 is a constant voltage source, the electric signal detected by the electrode pad 207 is a current signal. In some examples, each electrode pad 207 may function as both an electrode pad 207 that transmits electrical signals and an electrode pad 207 that receives electrical signals.

In some examples, the electrical impedance tomography image can be reconstructed using the measured electrical signals by alternately exciting two adjacent or opposite electrode sheets 207 and detecting the electrical signals between the remaining electrode sheets 207.

In some examples, in the process of detecting the electrical signal of the target area by using the electrode strips 20, when the electrode strips 207 are loosened or displaced, the processing module 30 may calculate the contact impedance between the electrode strips 207 and the target area, and if the contact impedance exceeds a set threshold, the processing module 30 may prompt the user to adjust the electrode strips 20 by using corresponding electrode status indicators or indicator lamps on the display module 40, so as to ensure that each electrode strip 207 can form a stable contact with the skin of the target area of the target object 10, thereby ensuring the accuracy of detecting the electrical signal.

As described above, in step S500 of the present embodiment, the electrical impedance image is obtained based on the electrical signal, and specifically, the processing module 30 has a function of restoring the electrical signal data acquired in one cycle to one frame image through processing. The processing module 30 can thus obtain an electrical impedance tomographic image of the target region of the target object 10 through analysis processing based on the obtained electrical signal, and display the electrical impedance tomographic image through the display module 40.

In some examples, the processing module 30 may include a printed circuit board of peripheral circuits such as a gain configuration circuit with programmable gain amplifiers, an electrical impedance tomography chip, software developed based on the electrical impedance tomography chip to specially reconstruct electrical impedance tomography images, a universal serial bus, and a computer.

In some examples, the display module 40 may include custom software, and a computer display, dedicated to reconstructing and displaying electrical impedance tomography images of the target region.

While the present disclosure has been described in detail in connection with the drawings and examples, it should be understood that the above description is not intended to limit the disclosure in any way. Those skilled in the art can make modifications and variations to the present disclosure as needed without departing from the true spirit and scope of the disclosure, which fall within the scope of the disclosure.

Claims (10)

1. An electrical impedance tomography imaging system, characterized in that,

comprises an electrode belt, a processing module and a display module,

the electrode strips are configured to be disposed at a target region of a target object to detect an electrical signal of the target region,

the electrode belt comprises a base belt and a plurality of electrode plates which are arranged on the base belt and connected with conductive wires,

the electrode plates are provided with a first electrode surface which is in contact with the base band and a second electrode surface which is opposite to the first electrode surface, the second electrode surface is sequentially provided with a sticky conductive adhesive and a release film which is of a multi-layer folding structure, and the release films of the adjacent electrode plates in the plurality of electrode plates are connected through a connecting structure;

the processing module is configured to receive the electrical signals and obtain electrical impedance images based on the electrical signals; the display module is configured to display the electrical impedance image.

2. The electrical impedance tomography system of claim 1,

the base band is of an elastic multilayer structure, and the multilayer structure is used for containing the conductive wire.

3. The electrical impedance tomography system of claim 1,

the release film comprises a first film layer attached with the conductive adhesive and a second film layer attached with the first film layer, and the first film layer and the second film layer are matched to form a double-layer folding structure.

4. The electrical impedance tomography system of claim 3,

at least a portion of the second film layer is exposed outside the edge of the base tape, and the second film layer exposed outside the edge of the base tape is printed with a logo for indicating a direction.

5. The electrical impedance tomography system of claim 3,

in adjacent electrode sheets, the connection structure includes a first end connected to the first membrane layer of one electrode sheet and a second end connected to the first membrane layer of another electrode sheet.

6. The electrical impedance tomography system of claim 1,

the connecting structure is an S-shaped structure.

7. The electrical impedance tomography system of claim 1,

the electrode plate is a metal electrode plate, and the material electroplated on the surface of the metal electrode plate is at least one of silver or silver chloride.

8. The electrical impedance tomography system of claim 1,

the electrode strip detection device further comprises a portable data acquisition device, wherein the portable data acquisition device is used for storing the electric signals detected by the electrode strip and transmitting the electric signals to the processing module in a wireless transmission mode.

9. A method of electrical impedance tomography imaging, comprising the steps of:

positioning an electrode strip to a target area of a target object, wherein the electrode strip comprises a base band and a plurality of electrode plates which are arranged on the base band and connected with conductive wires, the electrode plates are provided with a first electrode surface contacted with the base band and a second electrode surface opposite to the first electrode surface, the second electrode surface is sequentially provided with sticky conductive adhesive and release films in a multi-layer folding structure, and the release films of adjacent electrode plates in the plurality of electrode plates are connected through a connecting structure;

stripping the release film of at least one electrode plate, and stripping the residual release film of the electrode plate by using the connecting structure;

fixing the electrode belt on the target area through the conductive adhesive;

detecting an electrical signal using the electrode pad;

electrical impedance images are obtained based on the electrical signals.

10. The electrical impedance tomography imaging method of claim 9,

the base tape has a first base tape surface in contact with the electrode sheet and a second base tape surface opposite to the first base tape surface,

the second base band surface is provided with a marking pattern for positioning the electrode strip to a target area of the target object.

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