CN109621211A - A kind of local enhancement type 8-shaped cerebral magnetic stimulation coil - Google Patents
A kind of local enhancement type 8-shaped cerebral magnetic stimulation coil Download PDFInfo
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- CN109621211A CN109621211A CN201811631922.7A CN201811631922A CN109621211A CN 109621211 A CN109621211 A CN 109621211A CN 201811631922 A CN201811631922 A CN 201811631922A CN 109621211 A CN109621211 A CN 109621211A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/004—Magnetotherapy specially adapted for a specific therapy
- A61N2/006—Magnetotherapy specially adapted for a specific therapy for magnetic stimulation of nerve tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N2/00—Magnetotherapy
- A61N2/02—Magnetotherapy using magnetic fields produced by coils, including single turn loops or electromagnets
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Abstract
本发明提供一种局部增强型8字形经颅磁刺激线圈，通过将等厚型8字型经颅磁刺激线圈，在线圈背面中心区域加工成凹陷形状，并保持线圈正面线圈表面在一个平面上，使得在中心区域线圈等效电流离刺激区域更近，从而在所述中心区域范围产生比等厚结构更强的磁场脉冲，而对所述中心区域范围以外的其它区域磁场脉冲影响可忽略，使得所述局部增强型8字形经颅磁刺激线圈聚焦性更好，刺激范围更集中。
The invention provides a locally enhanced figure-eight transcranial magnetic stimulation coil. The equal-thickness figure-eight transcranial magnetic stimulation coil is processed into a concave shape in the central area of the back of the coil, and the front surface of the coil is kept on a plane. , so that the equivalent current of the coil in the central area is closer to the stimulation area, so that a stronger magnetic field pulse is generated in the central area than that of the equal-thickness structure, and the influence on the magnetic field pulse in other areas outside the central area is negligible, The locally enhanced figure-8 transcranial magnetic stimulation coil has better focus and more concentrated stimulation range.
Description
Technical field
The invention belongs to transcranial magnetic stimulation technical field, in particular to a kind of local enhancement type 8-shaped transcranial magnetic stimulation line
Circle.
Background technique
Transcranial magnetic stimulation (Transcranial magnetic stimulation, abbreviation TMS) technology is a kind of using arteries and veins
Magnetic fields are rushed in central nervous system, changes the film potential of cortical neural cell, is allowed to generate induced current, influence intracerebral generation
It thanks and neural electrical activity, so as to cause a series of Neural stem cell technology of biochemical reactions.TMS has noninvasive, painless, safe
Feature can be used for stimulating cranial nerve, nerve root and peripheral nerve.Be now widely used in Neuscience, brain science research field and
The diagnosing and treating of clinical disease.
Transcranial magnetic stimulation system consists of two parts: high pressure pulse generating system and stimulating coil.Existing stimulating coil master
To be figure-eight coil, in order to accurately and effectively stimulate appointed part, to the magnetic field strength of coil generation, stimulation depth and gather
Focal power is proposed very high requirement.The degree of focus of Neural stem cell determines the stimulation selective power of magnetic stimulation system.High degree of focus
Field stimulation can be reduced, the possibility that unrelated nerve fiber is stimulated is reduced.Stimulation depth determines that magnetic stimulation system can
Keep the distance of certain stimulus intensity.Need bigger stimulation deep if carrying out effective stimulus to intracranial deep nerve fiber
Degree and higher degree of focus, however existing general figure-eight coil uses the plane coiling of uniform thickness wire rod, and depth and degree of focus is stimulated to have
The problems such as limit, causes field stimulation big, and target spot selectivity is not strong.
Summary of the invention
The purpose of the present invention is to provide a kind of figure-eight coils with higher degree of focus, promote transcranial magnetic stimulation system
Effect of stimulation, to solve the problems, such as that existing uniform thickness figure-eight coil degree of focus is insufficient.
To achieve the above object, the present invention adopts the following technical scheme:
The thicker figure-eight coils such as general, in coil back center region processing at sunk area, so that hub of a spool position has
Thickness d 1 is imitated, peripheral region keeps original thickness d2, d1 < d2.
A further improvement of the present invention lies in that: d1:d2=(0.2~0.8).
A further improvement of the present invention lies in that: sunk area is to be with two circular coil intersection points of the figure-eight coil
Center, radius are not more than the exradius of any one of circular coil.
A further improvement of the present invention lies in that: sunk area is located at the back side of the figure-eight coil, separate and patient contact
Direction；The surface of two circular coils in front of the figure-eight coil is generally aligned in the same plane.
Compared with prior art, the invention has the following advantages that the present invention provides a kind of local enhancement type figure-eight coil,
By the way that thicker figure-eight coil will be waited, in coil back center region processing at sunk area so that central area coil current from
Stimulated zone is closer, so that pulsed magnetic field more stronger than uniform thickness structure is generated in the central area range, so that the part
Enhanced figure-eight coil degree of focus is more preferable.
Detailed description of the invention
Fig. 1 is a kind of transcranial magnetic stimulation systematic schematic diagram；
Fig. 2 is existing figure-eight coil structural schematic diagram；
Fig. 3 is enhanced figure-eight coil schematic diagram of the present invention；
Fig. 4 is enhanced figure-eight coil different piece of the present invention in target point function and effect schematic diagram.
Specific embodiment
Below with reference to specification embodiment and Figure of description, invention is further explained.
A kind of transcranial magnetic stimulation systematic schematic diagram is provided herein, as shown in Figure 1, transcranial magnetic stimulation system generally passes through power supply
It stores energy in energy storage pulsed capacitance, energy storage pulsed capacitance is then allowed to discharge stimulating coil rapid large-current, generate wink
Between pulsed magnetic field, patient is stimulated, general stimulating coil mostly uses figure-eight coil.
It please refers to shown in Fig. 2, existing figure-eight coil is uniform thickness structure, is made of two circular coils, and electric current is flowed from anode
Enter, by two circular coils, current direction is identical in two circular coil point of intersection, coil, coil is flowed out using cathode point,
To obtain certain focusing magnetic field effect in two circular coil intersection areas.
Local enhancement type figure-eight coil proposed by the invention, by the way that thicker figure-eight coil will be waited, in the coil back side
Local dent region is processed into heart district domain, so that the electric current by hub of a spool region is closer from stimulation point equivalent distances, thus
Pulsed magnetic field local enhancement effect is generated, it is more preferable to show as coil degree of focus.It please refers to shown in Fig. 3, in hub of a spool part 11,
Coil thickness is d1；In peripheral part 12, coil thickness d2.General d2 is about 20mm, d1 10mm, by current elements position etc.
Effect is that current carrying conductor center is estimated, then is equivalent in hub of a spool region, coil current when uniform thickness structure than being equivalent to from target
Point wants nearly 5mm, and at coil surface 10mm, central area coil current is about with target point equivalent distances when uniform thickness structure coil
Central area coil current and target point equivalent distances will reduce 5mm when 20mm, d1 take 10mm, become 15mm.Sunk area model
It encloses for centered on two circular coil intersection points, radius is less than the circular coil exradius, for example, circular coil exradius
For 60mm, circular coil inner circle radius is 30mm, and sunk area radius is 30mm, then sunk area occupied area is total less than coil
The 15% of area ensure that the sunk area range interior loop current direction is identical, to the local enhancement type figure-eight coil
The electrical parameters such as inductance, D.C. resistance and heat-sinking capability influence very little, to the local enhancement type figure-eight coil in depressed area
Regional magnetic field distribution has little effect other than the corresponding central area spatial dimension in domain.The local enhancement type figure-eight coil
It is mainly characterized in that: under the conditions of same current in the magnetic field that space generates, in the corresponding central area spatial dimension of sunk area
Inside there is local enhancement effect；Other than the corresponding central area spatial dimension of sunk area regional magnetic field distribution almost with etc. thicker
Figure-eight coil is identical in the magnetic field that corresponding area of space generates.
It please refers to shown in Fig. 4, local enhancement type figure-eight coil of the present invention can be divided into two parts: being located in coil
Central part 11 of the heart district domain with a thickness of d1 and the peripheral part 12 with a thickness of d2.Target point P is in hub of a spool range line circle
Surface distance is d, then is B11 as the magnetic field caused by target point P of central part 11, peripheral part 12 is produced in target point P
Raw magnetic field is that B12, B11 and B12 are contrary, since 11 distance objective point P of central part is than 12 distance objective of peripheral part
Point P wants small, therefore the total magnetic field direction of B11 > B12, P point is consistent with B11, and size is (B11-B12).Take d1=10mm, d2=
20mm, d=10mm, by current elements position be equivalent to current carrying conductor center estimation, then central part 11 to target point P it is equivalent away from
From for 15mm, and the equivalent distances of the 8 font identical central region of thicker such as corresponding and target point P are about 20mm, by electromagnetism
Knowledge, the magnetic field approximation for having limit for length's conducting wire to generate and distance square are inversely proportional, i.e., under same current, enhanced figure-eight coil
Central part 11 generated at coil surface 10mm magnetic field about etc. thicker figure-eight coil same area coil in coil surface
1.7 times of magnetic field are generated at 10mm, and magnetic field is mainly determined by electric current in the coil of central area at 10mm, farther out due to distance,
Smaller by the other region coil influences in periphery, then the magnetic field at target point P is mainly B11.And at the corresponding center of sunk area
Other than regional space range regional magnetic field distribution almost with etc. the magnetic field phase that is generated in corresponding area of space of thicker figure-eight coil
Together, it is seen that enhanced figure-eight coil provided by the present invention is compared to the thicker figure-eight coil such as existing under same current
It can be generated in a certain range of hub of a spool region and significantly increase effect, coil degree of focus be improved, more effectively to target point
Region is precisely stimulated.
The above is only the preferred embodiments of the disclosure, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, it is contemplated that change or replacement should all cover this
Within the protection scope of invention.
Claims (4)
1. a kind of 8-shaped cerebral magnetic stimulation coil is made of two circular coils, described two circular coils are in point of intersection electric current
Direction is consistent, which is characterized in that described two circular coil intersection area a certain range interior loops are with a thickness of d1, other region lines
It encloses with a thickness of d2, and d1 < d2.
2. 8-shaped cerebral magnetic stimulation coil as described in claim 1, which is characterized in that the regional scope with a thickness of d1
For centered on two circular coil intersection points, radius is less than the circular coil mean radius.
3. 8-shaped cerebral magnetic stimulation coil as described in claim 1, which is characterized in that d1:d2=(0.2~0.8).
4. 8-shaped cerebral magnetic stimulation coil as described in claim 1, which is characterized in that the 8-shaped cerebral magnetic stimulation coil
Front, described two circular coil surfaces in the same plane, be and patient contact direction；The 8-shaped transcranial magnetic stimulation
There are portion concave region, the sunk area interior loop is spatially separate with patient contact with a thickness of d1 at the back side of coil
Direction.
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| CN201811631922.7A CN109621211A (en) | 2018-12-29 | 2018-12-29 | A kind of local enhancement type 8-shaped cerebral magnetic stimulation coil |
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| CN201811631922.7A CN109621211A (en) | 2018-12-29 | 2018-12-29 | A kind of local enhancement type 8-shaped cerebral magnetic stimulation coil |
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Citations (12)
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|---|---|---|---|---|
| JPH05153607A (en) * | 1991-11-28 | 1993-06-18 | Totoku Electric Co Ltd | Degaussing coil |
| CN1208915A (en) * | 1997-05-19 | 1999-02-24 | 索尼公司 | Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof |
| CN104587606A (en) * | 2015-01-11 | 2015-05-06 | 北京工业大学 | TMS (transcranial magnetic stimulation) system and method controlled by electroencephalogram signals |
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| CN207605022U (en) * | 2017-05-23 | 2018-07-13 | 重庆医科大学附属口腔医院 | Tongue side anchorage |
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| US20190168012A1 (en) * | 2016-04-28 | 2019-06-06 | The Magstim Company Limited | Magnetic stimulation coil arrangement |
| CN209662447U (en) * | 2018-12-29 | 2019-11-22 | 北京神畅科技发展有限公司 | A kind of local enhancement type 8-shaped cerebral magnetic stimulation coil |
-
2018
- 2018-12-29 CN CN201811631922.7A patent/CN109621211A/en active Pending
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| JPH05153607A (en) * | 1991-11-28 | 1993-06-18 | Totoku Electric Co Ltd | Degaussing coil |
| CN1208915A (en) * | 1997-05-19 | 1999-02-24 | 索尼公司 | Apparatus for recording and/or reproducing data onto and/or from optical disk and method thereof |
| CN106489082A (en) * | 2014-05-07 | 2017-03-08 | 无线电力公司 | Foreign bodies detection in wireless energy transmission system |
| US20160042841A1 (en) * | 2014-08-06 | 2016-02-11 | Karlsruher Institut Fuer Technologie | Superconducting devices by optimization of the superconductor's local critical current |
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| CN207605022U (en) * | 2017-05-23 | 2018-07-13 | 重庆医科大学附属口腔医院 | Tongue side anchorage |
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Effective date of registration: 20201209 Address after: Chengkai international building, 355 Hongqiao Road, Xuhui District, Shanghai 200030 Applicant after: Song Jin Address before: Room 101, unit 1, building 6, Guodian Huayuan, yard 12, Anding Road, Chaoyang District, Beijing 100029 Applicant before: BEIJING SHENCHANG TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Application publication date: 20190416 |