CN105411587A - Thorax contour data acquisition method for human thorax electrical impedance tomography - Google Patents
Thorax contour data acquisition method for human thorax electrical impedance tomography Download PDFInfo
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- CN105411587A CN105411587A CN201510897427.0A CN201510897427A CN105411587A CN 105411587 A CN105411587 A CN 105411587A CN 201510897427 A CN201510897427 A CN 201510897427A CN 105411587 A CN105411587 A CN 105411587A
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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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
- A61B5/107—Measuring physical dimensions, e.g. size of the entire body or parts thereof
- A61B5/1077—Measuring of profiles
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Abstract
The invention provides a thorax contour data acquisition method for human thorax electrical impedance tomography. An adopted device comprises multiple displacement measurement sensors (1), supports (2) and a supporting panel (3). Multiple via holes (3-5) are formed around a hole (3-4) of the supporting panel (3). Each displacement measurement sensor (1) is fixedly connected to the supporting panel (3) through at least two via holes (3-5). The included angles between the displacement measurement sensors (1) and the human thorax and the positions of the displacement measurement sensors (1) are adjusted according to different positions of the corresponding via holes (3-5). The measured human thorax is located at the proper measurement position by adjusting the height of the supports (2) and the width of gaps between all panel bodies of the supporting panel (3). Electrodes are evenly distributed on the surface of the human thorax by adjusting the positions of the displacement measurement sensors (1) and the included angles between the displacement measurement sensors (1) and the human thorax. Spatial position information needed for updating a field domain model can be acquired in real time.
Description
Technical field
The invention belongs to bio-electrical impedance chromatography imaging technique field, be specifically related to a kind of thoracic cavity outline data acquisition method for torso model electrical impedance tomography.
Background technology
Electrical impedance tomography (ElectricalImpedanceTomography, EIT) technology, that the distribution resisted with organism internal resistance or a kind of novel undamaged biomedicine being changed to imageable target are detected and imaging technique, it detects the distribution of impedance of object under test inside by the voltage difference between detecting electrode, thus structurally and functionally reflects the biological nature of each biological tissue.EIT technology is a kind of novel process detection technique, in based on the diagnostic techniques of medical image, presents huge application prospect.Utilize EIT technology, can show the distribution of impedance image of organism inner tissue, the impedance of bio-tissue with frequency change image, organism organ physiological activity (as breathing, heartbeat, gastrointestinal peristalsis) time impedance variation image.EIT technology is that non-intruding detects and functional imaging technology, has the features such as safe, visual, in postgraduate's object physiological function and medical diagnosis on disease, has important clinical value.As compared to traditional medical visualization detection means based on ray (x-ray, pet), it has safe, easy, noinvasive, cheap advantage, can carry out for a long time, real-time monitoring to organism.About particularly the acquisition speed of EIT system can reach 500 width per second, far away higher than the speed that just can complete piece image for the about 3-10 of medical detecting method minute of current use.Therefore, develop bedside monitoring and real-time medical detection technique based on EIT, to the early prevention of disease, diagnosis, treatment and medical treatment generaI investigation, all there is very great meaning and tempting application prospect, be subject to the extensive concern of various countries' researcher in the world.
But, at present for the electrical impedance tomography systematic study that thoracic cavity is detected, mostly concentrate in the raising of boundary voltage certainty of measurement and the improvement of image reconstruction algorithm.But " soft field effect " determines from principle the precision that electrical impedance tomography can not reach " imaging of hard field ".EIT to be applied to the bedside monitoring of reality, still have series of problems to need to solve.Wherein matter of utmost importance solves kinetic measurement problem, and namely the shape and size size of detected field domain is all dynamic change, and existing EIT is mainly used in technological parameter and detects and visual, and the shape and size size of its tested field domain is all constant.Secondly, in the image reconstruction process that EIT is follow-up, set up when measurement model mostly supposes that measured object field is circle territory, and in most cases, measured object field is not the circle of standard, such as torso model is in respiratory, the border in thoracic cavity be a sub-elliptical and and non-circular profile, and to be among ceaselessly change.Therefore, the detection existing EIT data acquisition unit and method being directly used in torso model is outdated.
Summary of the invention
For the above-mentioned deficiency of prior art, the object of this invention is to provide a kind of thoracic cavity outline data acquisition method being applicable to torso model electrical impedance tomography, to obtain the spatial positional information upgrading field domain model and need.Technical scheme of the present invention is as follows:
A kind of thoracic cavity outline data acquisition method for torso model electrical impedance tomography, the thoracic cavity outline data harvester adopted comprises several parts such as multiple displacement measurement sensor (1), support (2), support panel (3), support panel (3) is fixed on support (2), the hole (34) that can hold human chest is offered at the middle part of support panel (3), wherein
Multiple via hole (35) is offered around the hole (34) of support panel (3), each displacement measurement sensor (1) is fixedly attached on support panel (3) by least two via holes (35), different according to the position of corresponding via hole (35), regulate angle and the position of displacement measurement sensor (1) and torso model;
Displacement measurement sensor (1) is for measuring the positional information of torso model in real time, comprise metallic cylinder (12), dielectric substance (17) is coated with at metallic cylinder (12) inner surface, metallic cylinder (12) inside is provided with metal bar (16), be connected with hollow non-metallic rods (11) in the side of metal bar (16), its opposite side is connected with non-metallic rods (15); The draw-in groove (14) for holding electrocardioelectrode is offered at the other end of non-metallic rods (15); Non-metallic rods (15), metal bar (16) are identical with the external diameter of hollow non-metallic rods (11) and match with the internal diameter that inwall is coated with the metallic cylinder (12) of dielectric substance (17), can within it be free to slide;
The hollow position wire via hole (110) of hollow non-metallic rods (11), two holding wires (18) of connection detector part (19), one is connected with metal bar (16) by the wire via hole (110) of hollow non-metallic rods (11), another root is connected with metallic cylinder (12), by the measurement to capacitance change, obtain the relative change information of displacement;
Described support panel (3) is at least two pieces of panels, by the securing member of gap width (32) can be regulated to be connected between panel with panel, by regulating gap width, makes tested torso model be in suitable measuring position; Described support (2) is the support that can adjust height,
The method comprises:
1) by regulating the gap width between the height of support (2) and each panel of support panel (3), tested torso model is made to be in suitable measuring position;
2) utilize draw-in groove (14) buckle electrocardioelectrode, by the position of adjusted position measurement sensor (1) and the angle with torso model thereof, make electrocardioelectrode be evenly distributed in torso model surface;
3) the tight snapping relationship between draw-in groove and electrocardioelectrode, make torso model in the process of breathing, the metal bar (16) as displacement measurement sensor (1) interior electrode can be driven to make corresponding motion along with the breathing of human body, the capacitance generation respective change of displacement measurement sensor (1), finally be reflected in the conversion of locus, thus obtain the real time data of torso model profile variations.
Wherein, dielectric substance (17) is politef; Bolt arrangement is made at the two ends of metal bar (16), in the one end near metal bar (16), non-metallic rods (15) and hollow non-metallic rods (11) make the screw thread of corresponding size in the axial direction, to make the two all firmly can be connected with the metal bar (16) being positioned at centre position, the fine setting to displacement measurement sensor (1) can also be realized by this structure.
Feature of the present invention is, on the basis not changing traditional E IT imaging data measuring principle, from the structure of torso model data acquisition unit, proposes new data collection architecture.From the demand extracted torso model positional information, devise the displacement measurement sensor based on capacity based distance measuring principle, this sensor can detect the boundary position of torso model in real time, thus determines its profile., the fat or thin tested crowd that differ different for height, the present invention all can adapt to, and can obtain good measurement effect.The present invention can make torso model data acquisition unit adapt to the change of torso model profile in respiratory, and determines the thoracic cavity profile of tested person in real time.
Accompanying drawing explanation
Fig. 1 is the overall architecture of of the present invention the adopted thoracic cavity outline data harvester for torso model electrical impedance tomography;
Fig. 2 is the axial sectional view of the displacement measurement sensor that the present invention adopts;
Fig. 3 is the structure chart of support of the present invention;
Fig. 4 is the top view of support panel of the present invention.
In figure: 1, displacement measurement sensor 2, support 3, support panel 4, spandrel girder
1-1, hollow non-metallic rods 1-2, metallic cylinder 1-3, gland 1-4, draw-in groove 1-5, non-metallic rods 1-6, metal bar 1-7, dielectric substance 1-8, holding wire 1-9, detection means 1-10, wire via hole
2-1, support column 2-2, bolt 2-3, base
3-1, supporting surface 3-2, securing member 3-3, connection gap 3-4, hole 3-5, via hole.
Detailed description of the invention
By reference to the accompanying drawings the thoracic cavity outline data acquisition method for torso model electrical impedance tomography of the present invention is described:
Of the present invention the adopted thoracic cavity outline data harvester for torso model electrical impedance tomography, as shown in Figure 1, this data acquisition unit comprises several parts such as displacement measurement sensor 1, support 2, support panel 3 and spandrel girder 4.Institute's displacement measurement sensor 1 is arranged on support panel 3, by the via hole 3-5 of quantity some on support panel 3, angle and the position of itself and torso model can be adjusted arbitrarily, after adjustment, through via hole 3-5, displacement measurement sensor 1 is fixed on support panel 3 with screw.Displacement measurement sensor 1 is for measuring the positional information of torso model in real time, and its one end near torso model can the circular snap-fastener of buckle cardiac diagnosis lead-line, just can realize the layout to electrocardioelectrode position distribution by adjusted position measurement sensor 1.Described support 2 has four, for supporting the spandrel girder 4 be positioned at above, and can adjust data acquisition unit in proper height, particularly displacement measurement sensor 1 and support panel 3 being adjusted to suitable height, to realize the measurement to height different crowd.Described support panel 3 is arranged on spandrel girder 4, for bracing displacement measuring transducer 1 and the size adjusting the torso model band of position, to realize the measurement to the fat or thin crowd that differs.Described spandrel girder 4, between support panel 3 and support 2, has the effect of load capacity and stabilising arrangement.
Displacement measurement sensor 1 structure of the present invention is, as shown in Figure 2, this sensor comprises several parts such as hollow non-metallic rods 1-1, metallic cylinder 1-2, gland 1-3, draw-in groove 1-4, non-metallic rods 1-5, metal bar 1-6, dielectric substance 1-7, holding wire 1-8, detection means 1-9 and wire via hole 1-10.The material selection lucite of hollow non-metallic rods 1-1, non-metallic rods 1-5 and draw-in groove 1-4, metal bar 1-6, metallic cylinder 1-2 and gland 1-3 adopt stainless steel material, dielectric substance 1-7 selects the politef (coefficient of friction is 0.04) that coefficient of friction in solid material is minimum, holding wire 1-8 selects the signal transmission wire with good shielding properties, and detection means 1-9 has higher sensitivity and stability.Hollow non-metallic rods 1-1 and being connected by bolt arrangement between metal bar 1-6, non-metallic rods 1-5 and metal bar 1-6, the diameter of three is identical.Bolt arrangement is made at the two ends of metal bar 1-6, and in the one end near metal bar 1-6, non-metallic rods 1-5 and hollow non-metallic rods 1-1 makes the screw thread of corresponding size in the axial direction, all firmly can be connected with the metal bar 1-6 being positioned at centre position to make the two.The fine setting to displacement measurement sensor 1 can also be realized by this structure.In the process measured, require that the length of metal bar 1-6 can not filler metal cylinder 1-1 completely, otherwise the capacitance of displacement measurement sensor 1 no longer will change, and namely be in saturation; In order to reduce the measurement error of initial position, the right opposite of metal bar 1-6 and metallic cylinder 1-1 can not be made to amass and to start from scratch.One end of holding wire 1-8 is connected with metal bar 1-6 by the wire via hole 1-10 being in hollow non-metallic rods 1-1 shaft core position, the other end is connected with the metallic cylinder 1-2 being in outside, realize the measurement to capacitance change by the testing circuit/instrument of next stage, thus reflect the change of displacement.Gland 1-3 is used for internal and external electrode and the dielectric substance 1-7 of fixed displacement measuring transducer 1, and can be realized installation and the replacing of dielectric substance 1-7 easily by gland 1-3.Be connected together by gluing between non-metallic rods 1-5 and draw-in groove 1-4, draw-in groove 1-4 internal diameter is set to 15mm, for the circular snap-fastener of buckle cardiac diagnosis lead-line (standard), circular snap-fastener is used for buckle electrocardioelectrode, by the position of adjusted position measurement sensor 1 and the angle with torso model thereof, electrocardioelectrode can be enable to be evenly distributed in torso model surface.Tight snapping relationship between draw-in groove and circular snap-fastener, makes torso model in the process of breathing, and the metal bar 1-6 as electrode in displacement measurement sensor 1 can be driven to make corresponding motion along with the breathing of human body.In this round motion, the interior electrode of displacement measurement sensor 1 and the right opposite of external electrode are long-pending to change, and capacitance also respective change occurs, and is finally reflected in the conversion of locus, and this spatial positional information upgrades that field domain model needs just.
As shown in Figure 3, support 2 is made up of three parts such as support column 2-1, bolt 2-2 and base 2-3.Wherein, support column 2-1 is used for the spandrel girder 4 in support level portion thereon, and the inwall of its lower end longitudinal axis line position has the screw thread of certain length, for connecting the bolt 2-2 be positioned on base; Bolt 2-2 is used for the height of adjusting pole 2, and its upper end screws in the inside of support column 2-1, and lower end and base 2-3 are connected as a single entity; Base 2-3 is arranged at ground, plays the effect supporting package unit, and ensures the stability of support 2.For the tested crowd with different height, torso model can be made to be in suitable measuring position by the height of adjustment four supports 2.If when Measuring Time is longer, tested person can select to sit down and accept thoracic cavity detection, to alleviate the sense of discomfort of tested person, and reduces because brought function of human body of standing for a long time reacts the adverse effect caused measurement result.
As the top view that Fig. 4 is support panel 3 in Fig. 1, support panel 3 of the present invention is made up of four supporting surfaces, together with being fixed on by the solid 3-2 of securing member between supporting surface 3-1 with supporting surface 3-1.Each is equipped with the via hole 3-5 of some quantity, after four supporting surface 3-1 are linked together by securing member 3-2, these circular vias will form three similar concentration ellipse shapes, and screw fixes displacement measurement sensor 1 by these circular vias.In order to realize the measurement to different crowd thoracic cavity, needing the distance between adjustment four supporting surface 3-1, making tested torso model be in suitable measuring position.
Claims (3)
1. the thoracic cavity outline data acquisition method for torso model electrical impedance tomography, the thoracic cavity outline data harvester adopted comprises several parts such as multiple displacement measurement sensor (1), support (2), support panel (3), support panel (3) is fixed on support (2), the hole (34) that can hold human chest is offered at the middle part of support panel (3), wherein
Multiple via hole (35) is offered around the hole (34) of support panel (3), each displacement measurement sensor (1) is fixedly attached on support panel (3) by least two via holes (35), different according to the position of corresponding via hole (35), regulate angle and the position of displacement measurement sensor (1) and torso model;
Displacement measurement sensor (1) is for measuring the positional information of torso model in real time, comprise metallic cylinder (12), dielectric substance (17) is coated with at metallic cylinder (12) inner surface, metallic cylinder (12) inside is provided with metal bar (16), be connected with hollow non-metallic rods (11) in the side of metal bar (16), its opposite side is connected with non-metallic rods (15); The draw-in groove (14) for holding electrocardioelectrode is offered at the other end of non-metallic rods (15); Non-metallic rods (15), metal bar (16) are identical with the external diameter of hollow non-metallic rods (11) and match with the internal diameter that inwall is coated with the metallic cylinder (12) of dielectric substance (17), can within it be free to slide;
The hollow position wire via hole (110) of hollow non-metallic rods (11), two holding wires (18) of connection detector part (19), one is connected with metal bar (16) by the wire via hole (110) of hollow non-metallic rods (11), another root is connected with metallic cylinder (12), by the measurement to capacitance change, obtain the relative change information of displacement;
Described support panel (3) is at least two pieces of panels, by the securing member of gap width (32) can be regulated to be connected between panel with panel, by regulating gap width, makes tested torso model be in suitable measuring position; Described support (2) is the support that can adjust height,
The method comprises:
1) by regulating the gap width between the height of support (2) and each panel of support panel (3), tested torso model is made to be in suitable measuring position;
2) utilize draw-in groove (14) buckle electrocardioelectrode, by the position of adjusted position measurement sensor (1) and the angle with torso model thereof, make electrocardioelectrode be evenly distributed in torso model surface;
3) the tight snapping relationship between draw-in groove and electrocardioelectrode, make torso model in the process of breathing, the metal bar (16) as displacement measurement sensor (1) interior electrode can be driven to make corresponding motion along with the breathing of human body, the capacitance generation respective change of displacement measurement sensor (1), finally be reflected in the conversion of locus, thus obtain the real time data of torso model profile variations.
2. collecting method according to claim 1, is characterized in that, dielectric substance (17) is politef.
3. collecting method according to claim 1, it is characterized in that, bolt arrangement is made at the two ends of metal bar (16), in the one end near metal bar (16), non-metallic rods (15) and hollow non-metallic rods (11) make the screw thread of corresponding size in the axial direction, to make the two all firmly can be connected with the metal bar (16) being positioned at centre position, the fine setting to displacement measurement sensor (1) can also be realized by this structure.
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| CN201510897427.0A CN105411587B (en) | 2015-12-07 | 2015-12-07 | For the thoracic cavity outline data acquisition method of torso model electrical impedance tomography |
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| CN201510897427.0A CN105411587B (en) | 2015-12-07 | 2015-12-07 | For the thoracic cavity outline data acquisition method of torso model electrical impedance tomography |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108567427A (en) * | 2018-05-16 | 2018-09-25 | 天津大学 | A kind of gate-type electrode of EIT imaging systems |
| CN113069100A (en) * | 2021-03-03 | 2021-07-06 | 桂林电子科技大学 | Three-dimensional boundary measurement structure and method for rotatable electrical impedance tomography |
| CN113080925A (en) * | 2021-03-03 | 2021-07-09 | 桂林电子科技大学 | Three-dimensional boundary measurement structure and method for electrical impedance tomography |
| CN114847913A (en) * | 2022-04-14 | 2022-08-05 | 四川大学华西医院 | Bioelectrical impedance tomography device and method |
| CN116327176A (en) * | 2023-05-29 | 2023-06-27 | 苏州维伟思医疗科技有限公司 | Contour measuring device and method and readable storage medium |
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| WO2013177126A2 (en) * | 2012-05-21 | 2013-11-28 | General Electric Company | Electrode assembly |
| CN203314961U (en) * | 2013-06-25 | 2013-12-04 | 思澜科技（成都）有限公司 | Electrode fixing and positioning device for electrical impedance breast imaging |
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| RU2053711C1 (en) * | 1991-12-19 | 1996-02-10 | Жулев Сергей Николаевич | Device for measuring electric conductivity of skin |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108567427A (en) * | 2018-05-16 | 2018-09-25 | 天津大学 | A kind of gate-type electrode of EIT imaging systems |
| CN113069100A (en) * | 2021-03-03 | 2021-07-06 | 桂林电子科技大学 | Three-dimensional boundary measurement structure and method for rotatable electrical impedance tomography |
| CN113080925A (en) * | 2021-03-03 | 2021-07-09 | 桂林电子科技大学 | Three-dimensional boundary measurement structure and method for electrical impedance tomography |
| CN113080925B (en) * | 2021-03-03 | 2024-03-01 | 桂林电子科技大学 | Three-dimensional boundary measurement structure and method for electrical impedance tomography |
| CN113069100B (en) * | 2021-03-03 | 2024-04-02 | 桂林电子科技大学 | Three-dimensional boundary measurement structure and method for rotatable electrical impedance tomography |
| CN114847913A (en) * | 2022-04-14 | 2022-08-05 | 四川大学华西医院 | Bioelectrical impedance tomography device and method |
| CN114847913B (en) * | 2022-04-14 | 2023-10-27 | 四川大学华西医院 | Bioelectrical impedance tomography device and bioelectrical impedance tomography method |
| CN116327176A (en) * | 2023-05-29 | 2023-06-27 | 苏州维伟思医疗科技有限公司 | Contour measuring device and method and readable storage medium |
| CN116327176B (en) * | 2023-05-29 | 2023-10-10 | 苏州维伟思医疗科技有限公司 | Contour measuring device and method and readable storage medium |
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