CN105534523B - Thoracic cavity outline data harvester for torso model electrical impedance tomography - Google Patents
Thoracic cavity outline data harvester for torso model electrical impedance tomography Download PDFInfo
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- CN105534523B CN105534523B CN201510891385.XA CN201510891385A CN105534523B CN 105534523 B CN105534523 B CN 105534523B CN 201510891385 A CN201510891385 A CN 201510891385A CN 105534523 B CN105534523 B CN 105534523B
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- support panel
- metal bar
- metallic rods
- metallic
- torso model
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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
-
- 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
- A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
- A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
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- Heart & Thoracic Surgery (AREA)
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- Physics & Mathematics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Physiology (AREA)
- Dentistry (AREA)
- Radiology & Medical Imaging (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
The present invention provides a kind of thoracic cavity outline data harvester for torso model electrical impedance tomography, including multiple displacement measurement sensors (1), stent (2), several parts such as support panel (3), support panel (3) is fixed on stent (2), the hole (3 4) of human chest can be accommodated by being offered in the middle part of support panel (3), multiple vias (3 5) are offered around the hole (3 4) of support panel (3), each displacement measurement sensor (1) is fixedly attached on support panel (3) by least two vias (3 5), it is different according to the position of corresponding via (3 5), adjust angle and the position of displacement measurement sensor (1) and torso model；Displacement measurement sensor (1) is used for the positional information for measuring torso model in real time.The present invention can obtain the renewal required spatial positional information of field domain model in real time.
Description
The invention belongs to bio-electrical impedance chromatography imaging technique field for technical field, and in particular to one kind is used for human body chest
The thoracic cavity outline data harvester of chamber electrical impedance tomography.
Background technology
Electrical impedance tomography (Electrical Impedance Tomography, EIT) technology, is with organism
The distribution or change of electrical impedance turn to a kind of new undamaged biomedical detection and the imaging technique of imageable target, it passes through
Voltage difference between detecting electrode detects the distribution of impedance inside object under test, so as to structurally and functionally reflect each biology
The biological nature of tissue.EIT technologies are a kind of new process detection techniques, in the diagnostic techniques based on medical image
Present huge application prospect.Using EIT technologies, distribution of impedance image, the organism group of biological in-vivo tissue can be shown
Impedance when image that the impedance knitted changes with frequency, organism organ physiological activity (such as breathing, heartbeat, gastrointestinal peristalsis)
Modified-image.EIT technologies are non-intruding detection and functional imaging technology, have the characteristics that safety, visualization, in research organism
There is important clinical value in terms of physiological function and medical diagnosis on disease.Can with traditional medicine based on ray (x-ray, pet)
Compared depending on changing detection means, it has safe and simple, noninvasive, cheap advantage, and long-term, real-time prison can be carried out to organism
Shield.Particularly the acquisition speed of EIT system can reach 500 width per second or so, the inspection of significantly larger than currently used medicine
The about 3-10 minutes speed that could complete piece image of survey method.Therefore, bedside monitoring and in real time doctor are developed based on EIT
Treat detection technique, all have to the early prevention of disease, diagnosis, treatment and medical treatment generaI investigation very great meaning and it is tempting should
With prospect, it is subject to the extensive concern of various countries researcher in the world.
However, boundary voltage measurement is mostly concentrated on for the electrical impedance tomography system research of thoracic cavity detection at present
In the raising of precision and the improvement of image reconstruction algorithm.But " soft field-effect " determines electrical impedance tomography not from principle
It is likely to be breached the precision of " hard field imaging ".EIT is applied to the bedside monitoring of reality, still there is a series of problems to need to solve
Certainly.Wherein matter of utmost importance is to solve the problems, such as dynamic measurement, that is, the shape and size size for being detected field domain is all dynamic change,
And existing EIT is mainly used in technological parameter detection and visualization, the shape and size size of its tested field domain is all constant
's.Secondly, in the follow-up image reconstruction processes of EIT, measurement model mostly assumes that tested object field is established in the case of round domain
, and in most cases, tested object field is not the circle of standard, for example torso model is in respiratory, the side in thoracic cavity
Boundary be an approximate ellipse and and non-circular profile, and among ceaselessly changing.Therefore, by existing EIT data
The detection that harvester is directly used in torso model is outdated.
The content of the invention
For the above-mentioned deficiency of the prior art, it is suitable for torso model electrical impedance the object of the present invention is to provide one kind and chromatographs
The thoracic cavity outline data real-time acquisition device of imaging, updates the required spatial positional information of field domain model to obtain.The present invention
Technical solution it is as follows：
A kind of thoracic cavity outline data harvester for torso model electrical impedance tomography, including multiple displacement measurements
Several parts such as sensor (1), stent (2), support panel (3), support panel (3) is fixed on stent (2), in support panel
(3) hole (3-4) of human chest can be accommodated by being offered in the middle part of, it is characterised in that
Multiple vias (3-5), each displacement measurement sensor (1) are offered around the hole (3-4) of support panel (3)
It is fixedly attached to by least two vias (3-5) on support panel (3), it is different according to the position of corresponding via (3-5), adjust
Angle and position of the displacement measurement sensor (1) with torso model；
Displacement measurement sensor (1) is used for the positional information for measuring torso model in real time, including metallic cylinder (1-2),
Metallic cylinder (1-2) inner surface is internally provided with metal bar (1- covered with dielectric substance (1-7) in metallic cylinder (1-2)
6) hollow non-metallic rods (1-1), are connected with the side of metal bar (1-6), its opposite side is connected with non-metallic rods (1-5)；
The other end of non-metallic rods (1-5) offers the card slot (1-4) for accommodating electrocardioelectrode；Non-metallic rods (1-5), metal bar
(1-6) and the outside diameter of hollow non-metallic rods (1-1) it is identical and with metallic cylinder (1- of the inner wall covered with dielectric substance (1-7)
2) internal diameter matches, can be free to slide in it；
The hollow position conducting wire via (1-10) of hollow non-metallic rods (1-1), two signal wires of connecting detection device (1-9)
(1-8), one is connected by the conducting wire via (1-10) of hollow non-metallic rods (1-1) with metal bar (1-6), another and metal
Cylinder (1-2) is connected, and by the measurement to capacitance change, obtains the opposite change information of displacement.
Preferably, dielectric substance (1-7) is polytetrafluoroethylene (PTFE)；The support panel (3) is at least
Two pieces of panels, are connected between panel and panel by that can adjust the fastener (3-2) of gap width, by adjusting slit width
It is narrow so that tested torso model is in suitable measurement position；Bolt arrangement is made at the both ends of metal bar (1-6), close to gold
Belonging to one end of rod (1-6), non-metallic rods (1-5) and hollow non-metallic rods (1-1) make the screw thread of corresponding size in the axial direction,
So that the two can firmly be connected with centrally located metal bar (1-6), can also be realized to displacement by this structure
The fine setting of measurement sensor (1).
It is a feature of the present invention that on the basis of traditional EIT imaging datas measuring principle is not changed, from torso model data
The structure of harvester is set out, it is proposed that new data collection architecture.From the demand extracted to torso model positional information,
The displacement measurement sensor based on capacity based distance measuring principle is invented, which can detect the boundary bit of torso model in real time
Put, so that it is determined that its profile.For height is different, the fat or thin tested crowd to differ, the present invention adapts to, and can obtain good
Good measurement effect.The invention enables the change that torso model data acquisition device adapts to torso model profile in respiratory
Change, and determine the thoracic cavity profile of tested person in real time.
Brief description of the drawings
Fig. 1 is the integrated stand of the thoracic cavity outline data harvester for torso model electrical impedance tomography of the present invention
Structure；
Fig. 2 is the axial sectional view of the displacement measurement sensor of the present invention；
Fig. 3 is the structure chart of the stent of the present invention；
Fig. 4 is the top view of the support panel of the present invention.
In figure：1st, displacement measurement sensor 2, stent 3, support panel 4, spandrel girder
1-1, hollow non-metallic rods 1-2, metallic cylinder 1-3, gland 1-4, card slot 1-5, non-metallic rods 1-6, metal
Rod 1-7, dielectric substance 1-8, signal wire 1-9, detection device 1-10, conducting wire via
2-1, support column 2-2, bolt 2-3, base
3-1, supporting surface 3-2, fastener 3-3, connection gap 3-4, hole 3-5, via.
Embodiment
A kind of thoracic cavity outline data collection dress for torso model electrical impedance tomography with reference to attached drawing to the present invention
Structure and each several part effect put illustrate：
As shown in Figure 1, the data acquisition device includes displacement measurement sensor 1, stent 2, support panel 3 and spandrel girder 4
Etc. several parts.Institute's displacement measurement sensor 1 is arranged on support panel 3, passes through via 3- a number of on support panel 3
5, its angle and position with torso model can be arbitrarily adjusted, after adjustment, with screw through via 3-5 displacement measurement
Sensor 1 is fixed on support panel 3.Displacement measurement sensor 1 is used for the positional information for measuring torso model in real time, its is close
One end of torso model can be buckled the circular snap-fastener of cardiac diagnosis lead-line, can be realized as by adjusting displacement measurement sensor 1
To the arrangement of electrocardioelectrode position distribution.The stent 2 has four, is used to support spandrel girder 4 located above, and can adjust number
According to harvester in proper height, displacement measurement sensor 1 and support panel 3 are particularly adjusted to suitable height, with reality
Now to the measurement of height different crowd.The support panel 3 is arranged on spandrel girder 4, is used to support 1 He of displacement measurement sensor
The size of the torso model band of position is adjusted, to realize the measurement to the fat or thin crowd that differs.The spandrel girder 4 is located at support panel
Between 3 and stent 2, there is load capacity and stabilising arrangement.
The present invention 1 structure of displacement measurement sensor be, as shown in Fig. 2, the sensor include hollow non-metallic rods 1-1,
Metallic cylinder 1-2, gland 1-3, card slot 1-4, non-metallic rods 1-5, metal bar 1-6, dielectric substance 1-7, signal wire 1-8, inspection
Survey several parts such as device 1-9 and conducting wire via 1-10.The material of hollow non-metallic rods 1-1, non-metallic rods 1-5 and card slot 1-4 are selected
With organic glass, metal bar 1-6, metallic cylinder 1-2 and gland 1-3 use stainless steel material, and dielectric substance 1-7 selects solid
The minimum polytetrafluoroethylene (PTFE) of friction coefficient (friction coefficient 0.04) in material, signal wire 1-8, which is selected, has good shielding properties
Signal transmission wire, detection device 1-9 there is higher sensitivity and stability.Hollow non-metallic rods 1-1 and metal bar 1-
6th, connected between non-metallic rods 1-5 and metal bar 1-6 by bolt arrangement, the diameter of three is identical.Do at the both ends of metal bar 1-6
Into bolt arrangement, close to one end of metal bar 1-6, non-metallic rods 1-5 and hollow non-metallic rods 1-1 make phase in the axial direction
The screw thread of size is answered, so that the two can firmly be connected with centrally located metal bar 1-6.Can be with by this structure
Realize the fine setting to displacement measurement sensor 1.During measurement, it is desirable to which the length of metal bar 1-6 cannot be filled up completely gold
Belong to cylinder 1-1, otherwise, the capacitance of displacement measurement sensor 1 will no longer change, i.e., in saturation state；It is initial in order to reduce
The measurement error of position, can not make metal bar 1-6 and the facing area of metallic cylinder 1-1 start from scratch.The one of signal wire 1-8
End is connected by the conducting wire via 1-10 in hollow non-metallic rods 1-1 shaft core positions with metal bar 1-6, and the other end is with being in outer
The metallic cylinder 1-2 in portion is connected, and the measurement to capacitance change is realized by detection circuit/instrument of next stage, so as to react
Go out the change of displacement.Gland 1-3 is used for the internal and external electrode and dielectric substance 1-7 of fixed displacement measurement sensor 1, and passes through pressure
Lid 1-3 can conveniently realize the installation and replacement of dielectric substance 1-7.By gluing between non-metallic rods 1-5 and card slot 1-4
It is connected together, card slot 1-4 internal diameters are set to 15mm, and for the circular snap-fastener of the cardiac diagnosis lead-line that is buckled (standard), circular snap-fastener is used for
Be buckled electrocardioelectrode, and the angle by adjusting the position of displacement measurement sensor 1 and its with torso model, can make electrocardioelectrode
Torso model surface can be evenly distributed in.Close snapping relationship between card slot and circular snap-fastener so that torso model exists
During breathing, it can drive and make phase with the breathing of human body as the metal bar 1-6 of electrode in displacement measurement sensor 1
The movement answered.In this round-trip movement, the facing area of the interior electrode and external electrode of displacement measurement sensor 1 changes
Become, capacitance also occurs respective change, is finally reflected the change in locus and changes, and this spatial positional information is exactly more new field
Domain model is required.
As shown in figure 3, stent 2 is made of three parts such as support column 2-1, bolt 2-2 and base 2-3.Wherein, support column 2-
1 is used to support the spandrel girder 4 in portion disposed thereon, and the inner wall of its lower end longitudinal axis line position has the screw thread of certain length, for even
Meet the bolt 2-2 on base；Bolt 2-2 is used for the height for adjusting stent 2, and the upper end screws in the inside of support column 2-1, under
End is connected as a single entity with base 2-3；Base 2-3 is arranged at ground, plays the role of supporting package unit, and ensure the steady of stent 2
It is qualitative.For the tested crowd with different heights, by adjusting the height of four stents 2 torso model can be caused to be in conjunction
Suitable measurement position.If in the case where time of measuring is longer, tested person, which can select to sit down, receives thoracic cavity detection, to mitigate
The sense of discomfort of tested person, and reduce to stand by long-time and bring function of human body reaction unfavorable shadow caused by measurement result
Ring.
Such as the top view that Fig. 4 is support panel 3 in Fig. 1, support panel 3 of the invention is made of four supporting surfaces, is supported
Face 3-1 is consolidated together with 3-2 is scheduled between supporting surface 3-1 by fastener.A number of via 3-5 is equipped with each face,
After four supporting surface 3-1 are linked together by fastener 3-2, these circular vias will form three similar concentration ellipse shapes
Shape, screw is by these circular vias come fixed displacement measurement sensor 1.In order to realize the measurement to different crowd thoracic cavity, need
Adjust the distance between four supporting surface 3-1 so that tested torso model is in suitable measurement position.
Claims (7)
1. a kind of thoracic cavity outline data harvester for torso model electrical impedance tomography, including multiple displacement measurements pass
Sensor (1), stent (2), support panel (3) several parts, support panel (3) is fixed on stent (2), in support panel (3)
Middle part offers the hole (3-4) that can accommodate human chest, it is characterised in that
Multiple vias (3-5) are offered around the hole (3-4) of support panel (3), each displacement measurement sensor (1) passes through
At least two vias (3-5) are fixedly attached on support panel (3), different according to the position of corresponding via (3-5), adjust displacement
Angle and position of the measurement sensor (1) with torso model；
Displacement measurement sensor (1) is used for the positional information for measuring torso model in real time, including metallic cylinder (1-2), in metal
Cylinder (1-2) inner surface is internally provided with metal bar (1-6) covered with dielectric substance (1-7) in metallic cylinder (1-2),
The side of metal bar (1-6) is connected with hollow non-metallic rods (1-1), its opposite side is connected with non-metallic rods (1-5)；Nonmetallic
The other end of rod (1-5) offers the card slot (1-4) for accommodating electrocardioelectrode；Non-metallic rods (1-5), metal bar (1-6) and
The outside diameter of hollow non-metallic rods (1-1) it is identical and with the internal diameter of metallic cylinder (1-2) of the inner wall covered with dielectric substance (1-7)
Match, can be free to slide in it；
The hollow position conducting wire via (1-10) of hollow non-metallic rods (1-1), two signal wire (1- of connecting detection device (1-9)
8), one is connected by the conducting wire via (1-10) of hollow non-metallic rods (1-1) with metal bar (1-6), another and round metal
Cylinder (1-2) is connected, and by the measurement to capacitance change, obtains the opposite change information of displacement.
2. data acquisition device according to claim 1, it is characterised in that dielectric substance (1-7) is polytetrafluoroethylene (PTFE).
3. data acquisition device according to claim 1, it is characterised in that the support panel (3) is at least two pieces
Panel, is connected by that can adjust the fastener (3-2) of gap width between panel and panel, by adjusting gap width, made
Torso model must be tested and be in suitable measurement position.
4. data acquisition device according to claim 1, it is characterised in that make bolt knot in the both ends of metal bar (1-6)
Structure, close to one end of metal bar (1-6), non-metallic rods (1-5) and hollow non-metallic rods (1-1) make accordingly in the axial direction
The screw thread of size, can be with by this structure so that the two can firmly be connected with centrally located metal bar (1-6)
Realize the fine setting to displacement measurement sensor (1).
5. data acquisition device according to claim 1, it is characterised in that the stent (2) is that can adjust height
Stent.
6. data acquisition device according to claim 1, it is characterised in that hollow non-metallic rods (1-1) and non-metallic rods
(1-5) selects organic glass.
7. data acquisition device according to claim 1, it is characterised in that metal bar (1-6), metallic cylinder (1-2) choosing
Use stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891385.XA CN105534523B (en) | 2015-12-07 | 2015-12-07 | Thoracic cavity outline data harvester for torso model electrical impedance tomography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891385.XA CN105534523B (en) | 2015-12-07 | 2015-12-07 | Thoracic cavity outline data harvester for torso model electrical impedance tomography |
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| Publication Number | Publication Date |
|---|---|
| CN105534523A CN105534523A (en) | 2016-05-04 |
| CN105534523B true CN105534523B (en) | 2018-04-24 |
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| CN201510891385.XA Expired - Fee Related CN105534523B (en) | 2015-12-07 | 2015-12-07 | Thoracic cavity outline data harvester for torso model electrical impedance tomography |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111012348A (en) * | 2019-12-10 | 2020-04-17 | 北京华睿博视医学影像技术有限公司 | Thoracic electrical resistance tomography method, apparatus and system |
| CN114452012B (en) * | 2022-04-12 | 2022-07-08 | 浙江伽奈维医疗科技有限公司 | Puncture operation breathing amplitude detection device and method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104605851A (en) * | 2015-02-16 | 2015-05-13 | 天津大学 | Electrical impedance tomography (EIT) system data acquisition method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202008010230U1 (en) * | 2008-07-31 | 2009-12-10 | Liebherr-Elektronik Gmbh | Position measuring device for a fluidic cylinder |
| WO2013177126A2 (en) * | 2012-05-21 | 2013-11-28 | General Electric Company | Electrode assembly |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104605851A (en) * | 2015-02-16 | 2015-05-13 | 天津大学 | Electrical impedance tomography (EIT) system data acquisition method |
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