CN217593617U - Double-layer cap-shaped transcranial magnetic coil - Google Patents
Double-layer cap-shaped transcranial magnetic coil Download PDFInfo
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- CN217593617U CN217593617U CN202220863600.0U CN202220863600U CN217593617U CN 217593617 U CN217593617 U CN 217593617U CN 202220863600 U CN202220863600 U CN 202220863600U CN 217593617 U CN217593617 U CN 217593617U
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 2
- 230000000638 stimulation Effects 0.000 abstract description 54
- 238000012545 processing Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000005284 excitation Effects 0.000 description 20
- 238000011491 transcranial magnetic stimulation Methods 0.000 description 19
- 210000004556 brain Anatomy 0.000 description 12
- 238000010586 diagram Methods 0.000 description 11
- 238000004088 simulation Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 230000005684 electric field Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 210000003710 cerebral cortex Anatomy 0.000 description 5
- 210000003128 head Anatomy 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 210000004761 scalp Anatomy 0.000 description 3
- 238000007920 subcutaneous administration Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 210000002569 neuron Anatomy 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004720 cerebrum Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000002739 subcortical effect Effects 0.000 description 1
- 239000013598 vector Substances 0.000 description 1
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Abstract
The utility model provides a pair of double-deck hat through cranium magnetic coil, including top layer hat coil and the bottom hat coil that is located top layer hat coil below, and bottom hat coil is located the inboard of top layer hat coil, top layer hat coil and bottom hat coil are middle arch, around the hat structure of surrounding formation, and be 90 degrees alternately in order to strengthen the focus between bottom hat coil and the top layer hat coil. The two-layer hat-shaped coil structure can enhance the stimulation intensity of the transcranial magnetic coil, the 90-degree angle between the bottom-layer hat-shaped coil and the top-layer hat-shaped coil can enable most of the field intensity generated by the two-layer hat-shaped coil to be concentrated on the central cross part and weaken the surrounding stimulation, so that the focusing performance of the transcranial magnetic coil can be enhanced, the transcranial magnetic coil has good stimulation depth and focusing performance, and the processing is convenient.
Description
Technical Field
The utility model relates to a transcranial magnetic technology field in the interdisciplinary discipline of electronic communication and biomedicine, in particular to a double-layer hat-shaped transcranial magnetic coil.
Background
The Transcranial Magnetic Stimulation (TMS) technology is a painless, noninvasive and relatively safe nerve regulation technology, and a pulse current is introduced into a coil to generate a time-varying Magnetic field, so that nerve cells are directly stimulated through external tissues of a brain structure to control excitation and inhibition of the nerve cells, and the aim of nerve regulation and control is fulfilled.
The transcranial magnetic coil is as indispensable device in the TMS, the effect of whole stimulation treatment is directly decided to its performance, in current transcranial magnetic coil, circular coil's comprehensive properties is relatively poor, splayed coil has more excellent performance in considering in compromise of penetrability and focusing nature, also universal being applied to in the real life, conical coil's penetrability is stronger, but the focus range is more dispersed, H-shaped coil pierce through stronger, it is not very good yet to correspond the focusing nature, the big and shape complicacy of scale, how to design and optimize neotype coil and become the research direction from now on. Existing transcranial magnetic coils suffer from the following drawbacks:
1. the conventional transcranial magnetic coil is usually considered for one point in the aspects of stimulation and focusing, the coil which is usually designed can reach a very deep stimulation depth but has a too wide focusing range, so that the influence on a non-focus part is generated, and when the focusing is good, the stimulation intensity is not enough, so that the depth of a focus cannot be stimulated.
2. The existing coil is generally used only for a certain kind of conditions after the design is finished, and the application range is limited.
3. The most basic circular coil is often used in the existing array coil, the performance of the coil is mainly changed through algorithm optimization, and the array structure of the coil is not designed aiming at the coil.
4. The existing transcranial magnetic coil with good performance is complex in design and has certain difficulty in processing practicality.
Disclosure of Invention
To the coil structure that exists among the prior art stimulation intensity low and focus relatively poor, the utility model provides a double-deck hat form transcranial magnetic coil realizes the stimulation to the different degree of brain different parts through adjusting excitation current's size and direction, finally strengthens the stimulation degree of depth greatly on the basis of giving consideration to good focus nature to the realization is amazing to the deep of brain.
In order to achieve the purpose of the invention, the utility model provides a double-layer hat-shaped transcranial magnetic coil, which comprises a top layer hat-shaped coil and a bottom layer hat-shaped coil, wherein the bottom layer hat-shaped coil is positioned below the top layer hat-shaped coil, the bottom layer hat-shaped coil is positioned at the inner side of the top layer hat-shaped coil, the top layer hat-shaped coil and the bottom layer hat-shaped coil are both hat-shaped structures, the middle of the hat-shaped coils is convex, the peripheries of the hat-shaped coils are in a winding shape, and the hat-shaped coils on the bottom layer and the top layer hat-shaped coil are crossed at 90 degrees to enhance the focusing performance.
After the scheme is adopted, the stimulation intensity of the transcranial magnetic coil can be enhanced by the arranged double-layer hat-shaped coil structure, the 90-degree angle is formed between the bottom-layer hat-shaped coil and the top-layer hat-shaped coil, so that most of the field intensity generated by the two layers of hat-shaped coils is concentrated at the central cross part, the surrounding stimulation is weakened, the focusing performance of the transcranial magnetic coil can be enhanced, the transcranial magnetic coil has good stimulation depth and focusing performance, and the processing is convenient.
Furthermore, the top hat coil and the bottom hat coil are both made of copper, and the conductivity is 5.8 multiplied by 10 7 S/m。
Further, the transcranial magnetic coil can be scaled down or enlarged to accommodate different needs.
Further, the top hat coil is of a multi-turn structure. By the arrangement, a plurality of excitations can be carried out, a plurality of exciting currents can generate multi-channel stimulation, and the shape and the focusing position of an electric field can be changed by controlling the exciting current of each coil.
Further, the bottom hat-shaped coil is of a multi-turn structure. According to the arrangement, a plurality of excitations can be carried out, a plurality of excitation currents can generate multi-channel stimulation, and the shape and the focusing position of an electric field can be changed by controlling the excitation current of each coil.
Further, the radius of the bottom hat coil is smaller than the radius of the top hat coil. So set up, can be convenient for set up the below inboard of top layer hat coil with bottom hat coil.
Further, the height of the bottom hat-shaped coil is smaller than that of the top hat-shaped coil. So set up, can be convenient for set up bottom cap shape coil the below inboard at top layer cap shape coil.
Further, the top hat coil has the same profile as the head. The coil can be better attached to the scalp, and excitation is facilitated.
Further, the outline of the bottom hat-shaped coil is the same as the outline of the head. The coil can be better attached to the scalp, and excitation is facilitated.
Further, each of the double-layered hat-shaped transcranial magnetic coils is defined as an array unit, and a plurality of the array units are arranged in an array. So set up, can come to carry out fixed point magnetic focusing to a plurality of positions through setting up the form into the array, reach many targets and stimulate adjustable effect.
Compared with the prior art, the utility model discloses beneficial effect that can realize is at least as follows:
1. the utility model relates to a transcranial magnetic coil, which has two aspects of stimulation intensity and focusing property, and aims to enhance the stimulation intensity, takes the shape of human brain and the fitting property of the coil into consideration, and designs the coil into a structure similar to a hat shape so as to be close to the brain as much as possible and reduce unnecessary loss; the design is an upper and lower double-layer structure, which can enhance the stimulation intensity, and meanwhile, in order to enhance the focusing property, the hat-shaped coil at the bottom layer is rotated by 90 degrees, so that the field intensity generated by the two layers of coils is mostly concentrated at the central crossing part, and the stimulation of the peripheral part is weakened.
2. In order to further strengthen the focusing, the utility model discloses set up the coil into multiturn structure, thereby produce not equidirectional magnetic field through adding the electric current of equidirectional to different passageways, based on the stack in magnetic field and offset the principle, strengthen amazing target point, weaken the regional amazing of non-target point to a high stimulation intensity, the good transcranial magnetic stimulation coil of focusing have been realized.
2. The double-layer hat-shaped transcranial magnetic coil provided by the utility model can change the size in equal proportion so as to adapt to the sizes of heads of adults and underages, and the performance is equivalent.
3. The utility model provides a but double-deck cap shape transcranial magnetic coil multichannel is adjusted, realizes different stimulations through changing the excitation, and after the scaling down size, can act as the circular coil of unit type, can constitute array structure.
4. The utility model discloses based on circular shape structure, design every unit, constitute whole coil through multiturn coiling at last, it is simply understandable, reduce the complexity of entity preparation and application.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts, wherein:
fig. 1 is a front view of a double-layer hat-shaped transcranial magnetic stimulation coil provided by the embodiment of the utility model.
FIG. 2 is a left side view of the double-layer hat-shaped transcranial magnetic stimulation coil provided by the embodiment of the utility model
Fig. 3 is a top view of a double-layered hat-shaped transcranial magnetic stimulation coil according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a unit structure of a hat-shaped transcranial magnetic stimulation coil according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a multi-turn structure of a hat-shaped transcranial magnetic stimulation coil provided by the embodiment of the invention.
Fig. 6 is a schematic diagram of a unit structure of a double-layer hat-shaped transcranial magnetic stimulation coil according to an embodiment of the present invention.
Fig. 7 is a schematic diagram of simulation results of the double-layer hat-shaped transcranial magnetic stimulation coil provided by the embodiment of the present invention, wherein the stimulation range is distributed around the coil.
Fig. 8 is a diagram illustrating simulation results of two stimulation forms that can be realized by the stimulation range distribution of the double-layer hat-shaped transcranial magnetic stimulation coil provided by the embodiment of the invention at the center.
Fig. 9 is a schematic diagram of the performance comparison between the double-layer hat-shaped transcranial magnetic stimulation coil and other coils provided by the embodiment of the invention.
Fig. 10 is a schematic diagram of simulation results of the double-layer hat-shaped transcranial magnetic stimulation coil according to the embodiment of the present invention, which is reduced by one time in equal proportion.
Fig. 11 is a schematic diagram of a simulation result of a double-combined coil formed by reducing the size of a double-layer hat-shaped transcranial magnetic stimulation coil by one time in equal proportion.
Fig. 12 is a schematic diagram of simulation results of extracting a focal volume from a double-layer hat-shaped transcranial magnetic stimulation coil according to an embodiment of the present invention.
Fig. 13 is a schematic diagram of a simulation result of extracting a focal volume from a double-combined coil formed by reducing the size of a double-layer hat-shaped transcranial magnetic stimulation coil by an equal proportion.
Fig. 14 is a schematic diagram of a multi-coil array structure that can be formed by the double-layer hat-shaped transcranial magnetic stimulation coil provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts are all the protection scope of the present invention.
Referring to fig. 1-6, the present invention provides a double-layered hat-shaped transcranial magnetic coil, which comprises a top hat-shaped coil 1 and a bottom hat-shaped coil 2 independently located below the top hat-shaped coil 1, wherein the bottom hat-shaped coil is located at the inner side of the top hat-shaped coil.
Based on the shape and the fit degree of the human brain, the top hat-shaped coil 1 and the bottom hat-shaped coil 2 are both designed into hat-shaped structures with convex centers and surrounding shapes, and the unit structures are shown in fig. 4. Aiming at the problem of small stimulation intensity, a double-layer hat-shaped structure is designed, meanwhile, in order to improve the focusing performance, the hat-shaped coil at the bottom layer is rotated by 90 degrees to form a cross structure with the hat-shaped coil at the top layer, the stimulation depth and the focusing performance of the transcranial magnetic coil are the problems that the two can not be completed, the stimulation depth is increased under the common condition to weaken the focusing performance, the good focusing performance is usually insufficient, and the problem of compromise is needed; meanwhile, in order to enhance focusing, the hat-shaped coil at the bottom layer is rotated by 90 degrees, so that the field intensity generated by the two layers of coils is mostly concentrated at the central crossing part, and the stimulation of the peripheral part is weakened.
In some embodiments of the present invention, the cross-sectional radius and the protrusion height of the bottom hat coil 2 are smaller than the top hat coil 1 in order to avoid collision with the top hat coil and for better close proximity to the scalp.
In some of the embodiments of the present invention, the top hat coil 1 and the bottom hat coil 2 are multi-turn structures, as shown in fig. 5, the coils are set to be multi-turn, each turn adds an excitation (input end), which is equivalent to a single channel, the multi-turn adds a plurality of excitations, a plurality of exciting currents can generate multi-channel stimulation, and the shape and focusing position of the electric field can be changed by controlling the exciting current of each turn of coils. The coil in the scheme has a double-layer and multi-turn structure, and stimulation of different positions with different intensities can be realized by controlling the excitation size and direction of a single turn and each layer. According to the superposition principle of the field intensity, when the field intensity generated by the excitation of the coil in the center is in one direction, the superposition enhancement effect can be realized, the field intensity of the central part is larger than that of the peripheral parts, when the directions are opposite, the central part can be mutually counteracted and weakened, and the field intensity of the peripheral parts is larger than that of the central part, so that different stimulation effects are achieved.
In some embodiments of the present invention, the top hat coil 1 and the bottom hat coil 2 are made of pure copper, and the electrical conductivity is 5.8 × 10 7 S/m。
In some embodiments of the present invention, the excitation size is set to 3000A, the frequency is 2000Hz, in order to accelerate the simulation speed and facilitate the comparison performance, the human brain is replaced by the spherical model, when the excitation direction of the top hat-shaped coil is set to one up and one down, and the excitation of the bottom hat-shaped coil is set to one left and one right, the field intensity is mainly concentrated around, at this moment, the stimulation effect of the double-layer hat-shaped transcranial magnetic coil is the same as the stimulation effect of the circular coil, but the stimulation intensity of the double-layer hat-shaped transcranial magnetic coil is higher, and the concentration range is smaller; when the excitation directions of the top layer are two lower, and the excitation directions of the bottom layer are two left and two right respectively, the field intensity is mainly concentrated at the center and inclines 45 degrees leftwards and rightwards respectively, at the moment, the stimulation effect of the double-layer hat-shaped transcranial magnetic coil is the same as that of the splayed coil, but the stimulation intensity of the double-layer hat-shaped transcranial magnetic coil is higher, and the concentration range is smaller; fig. 7-8 show simulation results of a multi-channel double-layer hat-shaped transcranial magnetic stimulation coil, and it can be seen that the coil can achieve the effect of adjustable focusing stimulation.
The utility model discloses in some of them embodiments, do the axis and can show the simulation result more numerically ground in cerebral cortex department, the change condition of field intensity when observing from the deep cerebrum inside of cerebral cortex, figure 9 shows for numeralization, can see out, under equal excitation, no matter be cerebral cortex or subcortical 20mm, 30mm department, the utility model discloses a double-deck hat through cranium magnetic coil all shows better stimulation intensity, center department, the field intensity of cerebral cortex can reach 390.48V/m, subcutaneous 20mm department, electric field intensity also can reach 168.21V/m, the electric field intensity of subcutaneous 30mm department still has 111.53V/m, and current circular coil and splayed coil all can only carry out the shallow layer stimulation, can't reach subcutaneous 20 mm's degree of depth. (the stimulation depth is less than 20mm, the stimulation is superficial layer, and the condition capable of causing the stimulation is that the electric field intensity is more than 100V/m)
In some embodiments of the present invention, the size ratio can be changed according to the different sizes of the heads of adults and children to meet the needs of different applicable people. The simulation result of the double-layer hat-shaped transcranial magnetic coil after being reduced by one time in equal proportion is shown in fig. 10, and it can be seen that the double-layer hat-shaped transcranial magnetic coil still keeps a stable stimulation range, which indicates that the size change does not influence the stimulation performance of the double-layer hat-shaped transcranial magnetic coil.
In some embodiments of the present invention, the double-layer hat-shaped transcranial magnetic coil after being reduced by one time in equal proportion can be used as a circular coil unit for forming the array coil, taking two double-layer hat-shaped transcranial magnetic coils as an example, the simulation result under the same condition is shown in fig. 11, it can be seen that the focusing range is mainly concentrated on the cross part of the centers of the two coils, fig. 12 is the focusing volume extracted from a single novel coil, fig. 13 is the combined coil formed by two novel coils after being reduced by one time in equal proportion, it can be seen that the maximum field intensity generated at the cerebral cortex by the two-coil combination is close to 370V/m, although the maximum field intensity is slightly reduced compared with 390.48V/m generated by a single large coil, the stimulation can still be caused, and it can be seen that the focusing volume is also reduced compared with a single large coil, and the performance is good.
Because the electric field is formed by the superposition of electric field vectors induced by a plurality of coils, the double-layer hat-shaped transcranial magnetic coil is further used as an array unit to form a multi-coil array, the human brain is replaced by a spherical model, and the human brain is stimulated through the array, in one embodiment of the utility model, as shown in figure 14, the 5 x 5 array consisting of 25 small coils is adopted, for a phased array of 25 sub-coils, each sub-coil has independent stimulation excitation, the fixed point magnetic focusing at any position in the brain can be realized, and the effect of multi-target point stimulation adjustment is achieved.
The double-layer hat-shaped transcranial magnetic coil provided by the embodiment of the utility model can enhance the stimulation of the target stimulation point position and weaken the unnecessary stimulation, thereby achieving accurate stimulation and improving the performance; the stimulation to different degrees of different parts of the brain can be realized by adjusting the size and the direction of the exciting current, and finally, the stimulation depth is greatly enhanced on the basis of considering good focusing property, so that the deep stimulation to the brain is realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The double-layer hat-shaped transcranial magnetic coil is characterized by comprising a top-layer hat-shaped coil and a bottom-layer hat-shaped coil, wherein the bottom-layer hat-shaped coil is positioned below the top-layer hat-shaped coil, the bottom-layer hat-shaped coil is positioned on the inner side of the top-layer hat-shaped coil, the top-layer hat-shaped coil and the bottom-layer hat-shaped coil are both hat-shaped structures with protruding middles and surrounding peripheries in a winding mode, and the bottom-layer hat-shaped coil and the top-layer hat-shaped coil are crossed at 90 degrees to enhance focusing performance.
2. The double-layered hat-shaped transcranial magnetic coil according to claim 1, wherein the top-layer hat-shaped coil and the bottom-layer hat-shaped coil are both made of copper.
3. The double-capped transcranial magnetic coil of claim 1, wherein the coil is capable of being scaled down or enlarged.
4. The double-layered hat-shaped transcranial magnetic coil of claim 1, wherein the top hat-shaped coil is of a multi-turn construction.
5. The double-layered hat-shaped transcranial magnetic coil of claim 1, wherein the bottom hat-shaped coil is of a multi-turn construction.
6. The double-layered hat-shaped transcranial magnetic coil of claim 1, wherein a radius of the bottom-layer hat-shaped coil is smaller than a radius of the top-layer hat-shaped coil.
7. The double-layered hat-shaped transcranial magnetic coil of claim 1, wherein the height of the protrusions of the bottom-layer hat-shaped coil is less than the height of the protrusions of the top-layer hat-shaped coil.
8. The double-layered hat-shaped transcranial magnetic coil of claim 1, wherein the top-layer hat-shaped coil has a profile that is the same as the head profile.
9. The double-layered hat-shaped transcranial magnetic coil of claim 1, wherein the bottom hat-shaped coil has a profile that is the same as the head profile.
10. The double-layered hat-shaped transcranial magnetic coil according to any one of claims 1-9, wherein each double-layered hat-shaped transcranial magnetic coil is defined as an array unit, and a plurality of the array units are arranged in an array.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220863600.0U CN217593617U (en) | 2022-04-14 | 2022-04-14 | Double-layer cap-shaped transcranial magnetic coil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220863600.0U CN217593617U (en) | 2022-04-14 | 2022-04-14 | Double-layer cap-shaped transcranial magnetic coil |
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| CN217593617U true CN217593617U (en) | 2022-10-18 |
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| CN202220863600.0U Expired - Fee Related CN217593617U (en) | 2022-04-14 | 2022-04-14 | Double-layer cap-shaped transcranial magnetic coil |
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Granted publication date: 20221018 |