CN114027817A - Electrical impedance imaging scanning detector - Google Patents
Electrical impedance imaging scanning detector Download PDFInfo
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- CN114027817A CN114027817A CN202111488835.2A CN202111488835A CN114027817A CN 114027817 A CN114027817 A CN 114027817A CN 202111488835 A CN202111488835 A CN 202111488835A CN 114027817 A CN114027817 A CN 114027817A
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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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Abstract
The utility model provides an electrode position is fixed, can be convenient carry out comprehensive detection, uses unified, unanimous procedure to carry out the electrical impedance imaging scanning detector of computer imaging. An anode probe, a cathode probe and a cambered surface of a control anode are arranged on the handle and tightly attached to a detected body; positive potential is connected to an anode bundling plate and an anode probe of the anode probe, and negative potential is connected to a cathode bundling plate and a corresponding cathode probe of the cathode probe; detecting the current between each anode probe and the corresponding cathode probe; obtaining the electrical impedance among the probes according to the current; the handle moves up and down and left and right to complete the whole scanning detection of the detected body. The tissue structure and property information of the inside of the subject are displayed on a display by a computer program. The research history of electrical impedance imaging is long and the data is rich. The instrument has simple structure and low cost. Compact structure and convenient popularization. Each detection electrode is fixed, so that signal processing is convenient to carry out on detection, and comparison and judgment on detection results are convenient.
Description
(I) technical field
The invention relates to an electrical impedance imaging instrument, in particular to an electrical impedance imaging scanning detector for electrical imaging detection by utilizing micro-resistivity.
(II) background of the invention
Electrical Impedance Tomography (EIT) is a method of reconstructing a resistivity distribution or a change image of the inside of a human body by applying a small safe driving current/voltage to the human body and measuring response information of the driving current or voltage in the human body according to different physiological and pathological states of different tissues in the human body, wherein the different tissues have different resistances/conductivities.
The human body can be seen as a complex conductor consisting of a large number of tissues with different electrical properties and different spatial distributions. Different tissues of different organs at different parts of a human body have different composition characteristics and components, show corresponding impedance characteristics, and have obvious difference. And the impedance of the tissue has a direct relationship to the frequency of the applied signal.
In the conventional electrical impedance imaging, a circle of electrodes is arranged around a human body to form an electrode array, wherein one pair of electrodes is connected with a driving current, and voltage and current between other electrode pairs are detected, so that the electrical impedance of internal tissues of the human body is determined, and accordingly, the electrical impedance imaging of the internal tissues is formed by a computer. The detection method has the advantages that the electrode positions are scattered and randomly arranged, a uniform and consistent detection imaging program cannot be formed, and therefore the detection method cannot be popularized like detection methods such as B-ultrasonic and CT.
In order to popularize electrical impedance imaging detection, an electrical impedance imaging scanning detector which has fixed electrode position, can conveniently carry out comprehensive detection and can use a uniform and consistent program to carry out computer imaging is needed.
Related patents for incoming impedance imaging in recent years are as follows:
the patent application numbers are: CN202110427775.7 entitled "a non-contact magnetic induction electrical impedance scanning imaging device and imaging method". The patent relates to a non-contact magnetic induction electrical impedance scanning imaging device and an imaging method, which relate to the field of biomedical imaging. The device mainly comprises a signal excitation module, a signal processing system, a control system and a display module. The invention has the main working process and effect that sine alternating excitation current is applied to the excitation coil at one side of the tested tissue, so that an alternating magnetic field is generated around the tested tissue, and the tested tissue generates alternating eddy current due to electromagnetic induction. The coil array on the other side of the tested tissue is covered for detection, so that the information in each section of the tested tissue is obtained, and then all the detection information is transmitted into the control unit, so that the three-dimensional detection of the tested tissue is realized.
The patent application uses an electromagnetic coil to excite biological tissue to generate excitation current, and the excitation current generates an induction magnetic field, so that the coil on the other side of the biological tissue generates current to detect the biological tissue. Obviously, the detection can not be conveniently carried out because front and back coils are needed, and the detection can not be popularized and used.
The patent application numbers are: CN200620025265.8 entitled "an electrode array sensor for electrical impedance imaging". This patent application relates to an electrode array sensor for electrical impedance tomography comprising cylindrical electrodes and electrode disks: the electrode disk is a plane disk, the columnar electrodes are positioned on one side of the electrode disk, the column axes are vertical to the electrode disk and distributed in two dimensions to form an electrode array, the electrode array is arranged according to an equilateral triangle topology, and 6 identical electrodes are distributed around each electrode in an equiangular and equidistant manner. When some electrode is injected with exciting current, a three-dimensional electric field is formed on the surface of a detected human body according to the impedance distribution of tissues, and other electrodes can form response to the distribution of the electric field through the human body tissues to obtain a plurality of deep fault information of the human body tissues parallel to the plane of the electrode disc. The electrode array, the current exciting circuit, the gating switch array and the signal detection circuit form a signal acquisition part of the electrical impedance tomography system, a digital signal is obtained after demodulation and analog-to-digital conversion, and the signal is input to a terminal computer through the digital signal processing circuit.
This patent application uses an electrode array sensor, the electrode array being arranged in an equilateral triangular topology, with 6 identical electrodes equiangularly and equidistantly distributed around each electrode. Obviously, the electrode arrangement is too scattered, a uniform and consistent detection imaging program cannot be used, and the electrode arrangement cannot be popularized and used.
Disclosure of the invention
The invention aims to develop an electrical impedance imaging scanning detector which has fixed electrode position, can conveniently carry out comprehensive detection and can use a unified and consistent program to carry out computer imaging.
The purpose of the invention is realized as follows:
an anode probe, a cathode probe and a cambered surface of a control anode are arranged on the handle and tightly attached to a detected body; positive potentials are connected to an anode cluster plate of an anode probe and 21 anode probes, negative potentials are connected to a cathode cluster plate of a cathode probe and 21 corresponding cathode probes, signals among the probes are detection signals, and the anode is controlled to be connected with direct current positive electricity and sine wave signal synthesis signals; carrying out alternating current modulation on the signals; detecting the current between each anode probe and the corresponding cathode probe; obtaining the electrical impedance among the probes according to the current; the handle moves up and down and left and right; and finishing the whole scanning detection of the detected body.
The tissue structure and property information of the inside of the subject are calculated based on the electrical impedance, and the tissue structure and property information of the inside of the subject are displayed on a display by a computer program.
(IV) description of the drawings
The specific structure of the invention is given by the following embodiments and the attached drawings:
FIG. 1 is a sectional view of the electrical impedance imaging scanning detector A-A of the present invention.
FIG. 2 is a bottom view of the electrical impedance imaging scanner of the present invention.
FIG. 3 is a front view of the anode probe of the electrical impedance imaging scanning detector of the present invention.
FIG. 4 is a sectional view of the anode probe A-A of the electrical impedance imaging scanning detector of the present invention.
FIG. 5 is a bottom view of the anode probe of the electrical impedance imaging scanner of the present invention.
FIG. 6 is a front view of the cathode probe of the electrical impedance imaging scanner of the present invention.
FIG. 7 is a sectional view of the cathode probe A-A of the electrical impedance imaging scanner of the present invention.
FIG. 8 is a bottom view of the cathode probe of the electrical impedance tomography scanner of the present invention.
FIG. 9 is an isometric view of an electrical impedance imaging scanning detector of the present invention.
FIG. 10 is an axial view of the anode probe of the electrical impedance tomography scanner of the present invention.
FIG. 11 is a schematic diagram of the electrical impedance imaging scanner of the present invention.
Wherein, (1) the handle, (2) the positive pole probe, (3) the negative pole probe, (4) control the positive pole, (5) the socket, (6) control the electric current, (7) detect the electric current 1, (8) detect the electric current 2, (9) detect the electric current 3, (10) the current of bundling plate, (11) the body to be detected;
(201) an anode PCB, (202) an anode probe, (203) an anode separation sleeve, and (204) an anode bundling plate;
(301) a cathode PCB, (302) a cathode probe, (303) a cathode separation sleeve, (304) a cathode bundling plate;
(2021) anode probe 1, (2022) anode probe 2, (2023) anode probe 3, (2027) anode probe 7, (2028) anode probe 8, (20214) anode probe 14, (20215) anode probe 15, and (20221) anode probe 21;
(2031) anode spacer 1, (2032) anode spacer 2, (2033) anode spacer 3, (2037) anode spacer 7, anode (2038) anode spacer 8, (20314) anode spacer 14, (20315) anode spacer 15, and (20321) anode spacer 21;
(3021) cathode probe 1, (3022) cathode probe 2, (3023) cathode probe 3, (3027) cathode probe 7, (3028) cathode probe 8, (30214) cathode probe 14, (30215) cathode probe 15, and (30221) cathode probe 21;
(3031) the cathode isolation sleeve 1, (3032) cathode isolation sleeve 2, (3033) cathode isolation sleeve 3, (3037) cathode isolation sleeve 7, (3038) cathode isolation sleeve 8, (30314) cathode isolation sleeve 14, (30315) cathode isolation sleeve 15, (30321) cathode isolation sleeve 21.
Referring to figures 1, 2, and 9: the handle (1) is of a shell structure and consists of an upper piece and a lower piece, and is provided with an anode probe (2), a cathode probe (3), a control anode (4) and a socket (5); the anode (4) is controlled to be in the middle, the anode probes (2) and the anode probes (3) are symmetrically distributed on two sides, and the structures are completely the same; the socket (5) is connected to the handle.
Referring to figures 3, 4, 5, 10: 21 anode probes 1(2021), 2(2022), … and 21(20221) are welded on an anode PCB (201) of the anode probe (2), and each probe (202) is formed by an anode isolation sleeve 1(2031), an anode isolation sleeve 2(2032), … and an anode isolation sleeve 21(20321) which are mounted in 21 holes of an anode beam plate (204) in an insulation manner.
Referring to fig. 6, 7, 8: 21 cathode probes 1(3021), 2(3022), … and 21(30221) are welded on a cathode PCB (301) of the cathode probe (3), and each cathode probe (302) is formed by a cathode isolation sleeve 1(3031), a cathode isolation sleeve 2(3032), … and a cathode isolation sleeve 21(30321) which are mounted in 21 holes of a cathode collector plate (304) in an insulating way.
Referring to fig. 11, the anode probe (202), the anode cluster plate (204) and the control anode (4) in the anode probe (2) are all connected with the same polarity voltage, and the cathode probe (302) and the cathode cluster plate (304) in the cathode probe (3) are connected with the potentials with the opposite polarities.
The current lines shown in fig. 11 are formed according to the connection relationship, which are respectively:
control current (6), detection current 1(7), detection current 2(8), detection current 3(9) and collecting plate current (10).
Wherein the control current (6) is the current between the control anode (4) and the cathode collector plate (304);
the detection current 1(7) is the current between the anode probe 1(2021) and the cathode probe 1 (3021);
the detection current 2(8) is the current between the anode probe 8(2028) and the cathode probe 8 (3028);
the detection current 3(9) is the current between the anode probe 15(20215) and the cathode probe 15 (30215);
the current (10) of the current collecting plate is the current between the anode current collecting plate (204) and the cathode current collecting plate (304).
The magnitude of the control current (6) controls the magnitude of the current curve of the detection current 1(7), the detection current 2(8), the detection current 3(9) and the bundling plate current (10) protruding into the detected body (11).
The magnitude of the current (10) of the bundling plate controls the thickness of the current curve of the detection current (1), (7), the detection current (2), (8) and the detection current (3), (9).
The detection currents 1(7), 2(8) and 3(9) detect the electrical impedance of each circuit in the subject (11). The control current (6) is increased from small to large, and the scanning detection of the detection current 1(7), the detection current 2(8) and the detection current 3(9) on the detected object (11) from outside to inside is completed.
The handle (1) moves up and down and left and right to complete the whole scanning detection of the detected body (11).
The above figures are for descriptive convenience only, and 21 probes 1(2021) … probes 21(20221) are uniformly arranged on the cathode probe (2) and the cathode probe (3), and the arrangement number can be arbitrarily arranged according to requirements. The detection current and the control voltage are not limited to direct current, and may be pulse current or modulated amplitude-modulated alternating current of various frequencies.
In particular, a modulated amplitude-modulated alternating current of a specific frequency is used for specific tissue, specific detection, depending on the fact that the impedance of the biological tissue has a direct relationship with the frequency of the applied signal.
The invention is not limited to the fields of human disease detection, physical examination, biochemical examination and the like, and can also be applied to the fields of soil, archaeology, forestry research and the like.
(V) detailed description of the preferred embodiments
Welding anode probes 1(2021), … and anode probes 21(20221) on the anode PCB (201) according to the attached drawings 3, 4 and 5;
the anode separation sleeves 1(2031), … and 21(20321) are inserted into the 21 holes of the anode beam plate (204). Then, the anode probes (anode probes 1(2021), …, and anode probes 21(20221)) on the anode PCB (201) are inserted into the corresponding anode isolation sleeve (203) to form the anode probe (2). The same mounting process forms the cathode probe (3). The axial view of the anode probe (2) is shown in FIG. 10.
The anode probe (2), the cathode probe (3) and the control anode (4) which are installed on the handle (1) according to the attached drawings 1 and 9 and are connected with a lead to the socket (5). The socket (5) is connected with the computer interface board through a plug.
The working process of the invention is as follows:
1. an anode probe (2), a cathode probe (3) and the cambered surface of a control anode (4) are arranged on the handle (1) and tightly attached to a detected body (11).
2. A positive potential is connected to the anode beam collecting plate (204) of the anode probe (2) and the anode probes 1(2021) to 21(20221) of the anode, a negative potential is connected to the cathode beam collecting plate (304) of the cathode probe (3) and the cathode probes 1(3021) to 21(30221) of the cathode probe, signals between the probes are detection signals, and the anode (4) is controlled to be connected to a direct current positive and sine wave signal synthesis signal.
3. The above signals are ac modulated.
4. Current sense 1(7), current sense 2(8), current sense 3(9), and current flow between other anode probes and corresponding cathode probes.
5. The electrical impedance between the probes is obtained from the above currents.
6. The handle (1) moves up and down and left and right.
7. The above processes 4 and 5 are repeated.
8. The whole scanning detection of the detected body (11) is completed.
9. The tissue structure and property information inside the subject (11) are calculated based on the electrical impedance, and the tissue structure and property information inside the subject (11) are displayed on a display by a computer program.
The invention has the following characteristics:
1. the detection current is in a safe range and has no harm to human body.
2. Tissue traits may be detected.
3. The research history of electrical impedance imaging is long and the data is rich.
4. The instrument is made of common materials, and has the advantages of simple structure, low cost and good economical efficiency.
5. Compact structure and convenient popularization.
6. Each detection electrode is fixed, so that signal processing is convenient to carry out on detection, and comparison and judgment on detection results are convenient.
Claims (6)
1. An electrical impedance imaging scanning detector is characterized in that the electrical impedance imaging scanning detector comprises:
(1) the device comprises a handle, an anode probe (2), a cathode probe (3), a control anode (4) and a socket (5);
(201) an anode PCB, (202) an anode probe, (203) an anode separation sleeve, and (204) an anode bundling plate;
(301) a cathode PCB, (302) a cathode probe, (303) a cathode separation sleeve, (304) a cathode bundling plate;
(2021) anode probe 1, (2022) anode probe 2, (2023) anode probe 3, (2027) anode probe 7, (2028) anode probe 8, (20214) anode probe 14, (20215) anode probe 15, and (20221) anode probe 21;
(2031) anode spacer 1, (2032) anode spacer 2, (2033) anode spacer 3, (2037) anode spacer 7, anode (2038) anode spacer 8, (20314) anode spacer 14, (20315) anode spacer 15, and (20321) anode spacer 21;
(3021) cathode probe 1, (3022) cathode probe 2, (3023) cathode probe 3, (3027) cathode probe 7, (3028) cathode probe 8, (30214) cathode probe 14, (30215) cathode probe 15, and (30221) cathode probe 21;
(3031) the cathode isolation sleeve 1, (3032) cathode isolation sleeve 2, (3033) cathode isolation sleeve 3, (3037) cathode isolation sleeve 7, (3038) cathode isolation sleeve 8, (30314) cathode isolation sleeve 14, (30315) cathode isolation sleeve 15, (30321) cathode isolation sleeve 21.
2. An electrical impedance imaging scanning detector according to claim 1, wherein: the handle (1) is of a shell structure and consists of an upper piece and a lower piece, and is provided with an anode probe (2), a cathode probe (3), a control anode (4) and a socket (5); the anode (4) is controlled to be in the middle, the anode probes (2) and the anode probes (3) are symmetrically distributed on two sides, and the structures are completely the same; the socket (5) is connected to the handle.
3. An electrical impedance imaging scanning detector in accordance with claim 1, wherein: 21 anode probes 1(2021), 2(2022), … and 21(20221) are welded on an anode PCB (201) of the anode probe (2), and each probe (202) is formed by an anode isolation sleeve 1(2031), an anode isolation sleeve 2(2032), … and an anode isolation sleeve 21(20321) which are mounted in 21 holes of an anode beam plate (204) in an insulation manner.
4. An electrical impedance imaging scanning detector in accordance with claim 1, wherein: a positive potential is applied to the anode cluster plate (204) of the anode probe (2) and the anode probes 1(2021) to 21(20221) of the anode probe, a negative potential is applied to the cathode cluster plate (304) of the cathode probe (3) and the cathode probes 1(3021) to 21(30221) of the cathode probe, and signals between the probes are detection signals.
5. An electrical impedance imaging scanning detector in accordance with claim 1, wherein: the anode (4) is controlled to be connected with a direct current positive electricity and sine wave signal synthesis signal.
6. An electrical impedance imaging scanning detector in accordance with claim 1, wherein: the detection and control signals are ac modulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488835.2A CN114027817A (en) | 2021-12-10 | 2021-12-10 | Electrical impedance imaging scanning detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111488835.2A CN114027817A (en) | 2021-12-10 | 2021-12-10 | Electrical impedance imaging scanning detector |
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| Publication Number | Publication Date |
|---|---|
| CN114027817A true CN114027817A (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111488835.2A Pending CN114027817A (en) | 2021-12-10 | 2021-12-10 | Electrical impedance imaging scanning detector |
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|---|---|
| CN (1) | CN114027817A (en) |
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2021
- 2021-12-10 CN CN202111488835.2A patent/CN114027817A/en active Pending
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