CN109621208A - A kind of hollow core coil for transcranial magnetic stimulation - Google Patents
A kind of hollow core coil for transcranial magnetic stimulation Download PDFInfo
- Publication number
- CN109621208A CN109621208A CN201811629458.8A CN201811629458A CN109621208A CN 109621208 A CN109621208 A CN 109621208A CN 201811629458 A CN201811629458 A CN 201811629458A CN 109621208 A CN109621208 A CN 109621208A
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- China
- Prior art keywords
- coil
- hollow core
- magnetic
- core
- magnetic stimulation
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Classifications
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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
-
- 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
Abstract
The present invention provides a kind of hollow core coil for transcranial magnetic stimulation, it is made of hollow core and the coil being wound on outside hollow core, the core material is Fe-based amorphous soft magnetic materials or nano crystal soft magnetic material, so that coil axis maximum value of magnetic field position is not in coil surface, but from coil surface have with a certain distance from space point, target point can precisely be stimulated, a possibility that unrelated nerve fiber is stimulated significant decrease, it is sharp to alleviate scalp, simultaneously because the high magnetic permeability of iron core, so that electric current can be generated heat seldom in magnetic stimulating coil with very little.
Description
Technical field
The invention belongs to transcranial magnetic stimulation technical field, in particular to a kind of hollow core line for transcranial magnetic stimulation
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 can be divided into two parts: high pressure pulse generating system and stimulating coil.In order to accurately have
Effect ground stimulation appointed part, the magnetic field strength generated to coil, stimulation depth and degree of focus are proposed very high requirement.Magnetic thorn
Sharp degree of focus determines the stimulation selective power of magnetic stimulator.High degree of focus can reduce field stimulation, reduce unrelated nerve
Organize the possibility being stimulated.Stimulation depth determines that magnetic stimulator is able to maintain the distance of certain stimulus intensity.Accurately office
Portion's stimulation is possible to carry out effective stimulus to intracranial deep nerve fiber.However existing cerebral magnetic stimulation coil, such as conventional 8
Wordline circle and circular coil are all that stimulus intensity reduces as stimulation depth deepens, i.e., always experience close to the tissue of coil
Bigger stimulus intensity is experienced to the tissue than separate coil, the problems such as so as to cause patient's scalp shouting pain.
Summary of the invention
The purpose of the present invention is to provide a kind of cerebral magnetic stimulation coils, and existing cerebral magnetic stimulation coil is overcome to enclose offline
Closer, the higher feature of magnetic field strength, the Surface field intensity for solving existing magnetic stimulating coil is excessive and patient's scalp is caused to pierce
The problem of pain.
To achieve the above object, the present invention adopts the following technical scheme:
It proposes a kind of hollow core coil for transcranial magnetic stimulation, is made of iron core and the coil being wound on iron core, institute
Stating iron core is hollow structure；The iron core exradius is Ro, and the inner circle radius of the iron core is Ri, Ri > 0, the iron core
Length is L, and the iron core is soft magnetic materials.
A further improvement of the present invention lies in that: Ri:Ro=(0.2~0.8).
A further improvement of the present invention lies in that: Ro=(25~250) mm；L=(50~500) mm.
A further improvement of the present invention lies in that: the core material is Fe-based amorphous soft magnetic materials or nano-crystal soft-magnetic material
Material.
Compared with prior art, the invention has the following advantages that the present invention provides one kind by hollow core and external coil
The cerebral magnetic stimulation coil of composition, so that coil axis maximum value of magnetic field is not in coil surface, unrelated nerve fiber is stimulated
A possibility that significantly reduce, reduction of patient scalp shouting pain, simultaneously because the high magnetic permeability of iron core, allow in coil electric current very
Small, fever is seldom.
Detailed description of the invention
Fig. 1 is a kind of transcranial magnetic stimulation systematic schematic diagram；
Fig. 2 is the hollow core coil schematic diagram of the present invention for transcranial magnetic stimulation.
Specific embodiment
Below with reference to specification embodiment and Figure of description, invention is further explained.
A kind of transcranial magnetic stimulation system principle is provided herein, as shown in Figure 1, transcranial magnetic stimulation system generally will by power supply
Then energy storage allows energy storage pulsed capacitance to discharge by thyristor coil rapid large-current, produces in energy storage pulsed capacitance
Raw momentary pulse magnetic field, stimulates patient.
It please refers to shown in Fig. 2, a kind of hollow core cerebral magnetic stimulation coil proposed by the invention, by 11 He of hollow core
Coil 12 on iron core is wound on to form, 11 exradius of iron core is Ro, and the inner circle radius of the iron core 11 is Ri, Ri > 0,
The length of the iron core is L, and the material of the iron core is soft magnetic materials.General Ri:Ro=(0.2~0.8)；Ro=(25~
250)mm；L=(50~500) mm.Here provide a kind of preferred implementation parameter: iron core material is Fe-based amorphous soft magnetic materials；Ri
=60mm；Ro=120mm；L=500mm is wound on the coil of iron core periphery using copper wire winding, and it is long that each circle is evenly distributed on iron core
It spends in range.
It please refers to shown in Fig. 2, on coil axis direction, in the A point close to coil surface, since the magnetic line of force is mainly concentrated
In core material, and the coil inside hollow region magnetic line of force is seldom, A point magnetic field very little；Along axis gradually to far from coil side
To movement, since iron-core coil is equivalent to a magnet, corresponding magnetic field is certainly existed in exterior space, therefore is just started with along axis
Line is gradually distance from coil, for example reaches B point, and magnetic field is gradually increased；Later due to more and more remoter apart from iron-core coil, such as
C point is reached, magnetic field gradually becomes smaller again, until magnetic field is zero at infinity.It can be seen that in iron-core coil axis by coil surface
Gradually to far from coil direction, with becoming larger for distance, there was the process being gradually increased in magnetic field before this, reached maximum value
It gradually becomes smaller again afterwards, the position for maximum value occur is related with the size of iron core, and adjusting core dimensions parameter can get suitable position
Maximum value of magnetic field point.It should be noted that since there are maximum saturation magnetic field strength, the peaces of external coil for core material
The number of turns should not be too big, is suitable for by the way of in parallel between each circle.
Using the cerebral magnetic stimulation coil of hollow core, due to the magnetic amplification effect of iron core, electric current is compared in coil
Much smaller times when air core coil, almost do not have to worry coil heating problem；And local magnetic field maximum value can be formed in space
Point avoids stimulation to unrelated nerve fiber, it is sharp to alleviate scalp convenient for precisely being stimulated target point.
The above is only the preferred embodiments of the disclosure, but the protection scope invented is not limited thereto, any ripe
Those skilled in the art are known in the technical scope disclosed by the present invention, it is contemplated that change or replacement should all be covered in this hair
Within bright protection scope.
Claims (4)
1. a kind of cerebral magnetic stimulation coil, which is characterized in that the cerebral magnetic stimulation coil is by hollow core and is wound in described
Coil composition on empty iron core, the hollow core exradius are Ro, and the inner circle radius of the hollow core is Ri, Ri > 0,
The length of the hollow core is L, and the material of the hollow core is soft magnetic materials.
2. cerebral magnetic stimulation coil as described in claim 1, which is characterized in that Ri:Ro=(0.2~0.8).
3. cerebral magnetic stimulation coil as described in claim 1, which is characterized in that Ro=(25~250) mm；L=(50~500)
mm。
4. cerebral magnetic stimulation coil as described in claim 1, which is characterized in that the material of the hollow core is Fe-based amorphous
Soft magnetic materials or nano crystal soft magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811629458.8A CN109621208A (en) | 2018-12-29 | 2018-12-29 | A kind of hollow core coil for transcranial magnetic stimulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811629458.8A CN109621208A (en) | 2018-12-29 | 2018-12-29 | A kind of hollow core coil for transcranial magnetic stimulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109621208A true CN109621208A (en) | 2019-04-16 |
Family
ID=66079098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811629458.8A Pending CN109621208A (en) | 2018-12-29 | 2018-12-29 | A kind of hollow core coil for transcranial magnetic stimulation |
Country Status (1)
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|---|---|
| CN (1) | CN109621208A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068131A (en) * | 2021-11-22 | 2022-02-18 | 河北工业大学 | Transcranial magnetic stimulation coil |
| WO2024000925A1 (en) * | 2022-06-27 | 2024-01-04 | 中国科学院自动化研究所 | Magnetic stimulation device and magnetic stimulation apparatus |
-
2018
- 2018-12-29 CN CN201811629458.8A patent/CN109621208A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068131A (en) * | 2021-11-22 | 2022-02-18 | 河北工业大学 | Transcranial magnetic stimulation coil |
| WO2024000925A1 (en) * | 2022-06-27 | 2024-01-04 | 中国科学院自动化研究所 | Magnetic stimulation device and magnetic stimulation apparatus |
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| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201207 Address after: Chengkai international building, 355 Hongqiao Road, Xuhui District, Shanghai 200030 Applicant after: Song Jin Address before: 100029 room 1, unit 6, building 12, Anding Road, No. 12, Anding Road, Chaoyang District, Beijing. Applicant before: BEIJING SHENCHANG TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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