CN114847953A - Brain magnetic scanning equipment - Google Patents
Brain magnetic scanning equipment Download PDFInfo
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- CN114847953A CN114847953A CN202210785662.9A CN202210785662A CN114847953A CN 114847953 A CN114847953 A CN 114847953A CN 202210785662 A CN202210785662 A CN 202210785662A CN 114847953 A CN114847953 A CN 114847953A
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/242—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents
- A61B5/245—Detecting biomagnetic fields, e.g. magnetic fields produced by bioelectric currents specially adapted for magnetoencephalographic [MEG] signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/40—Detecting, measuring or recording for evaluating the nervous system
- A61B5/4076—Diagnosing or monitoring particular conditions of the nervous system
- A61B5/4088—Diagnosing of monitoring cognitive diseases, e.g. Alzheimer, prion diseases or dementia
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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
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- A61B5/702—Posture restraints
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Abstract
The invention provides a magnetoencephalography scanning device, which comprises a scanning bed device, a magnetic shielding device, a magnetoencephalography detector arranged on the scanning bed device and a magnetic stabilization configuration beneficial to the magnetoencephalography detector to detect magnetoencephalography signals; the scanning bed device comprises a bed body mechanism, a guide rail component and a fixing component for fixing the guide rail component; the magnetic shielding device comprises a magnetic shielding cylinder and a fixing base for fixing the magnetic shielding cylinder; one end of the guide rail component is abutted to the bed body mechanism, the other end of the guide rail component extends into the magnetic shielding barrel, a hole is formed in the magnetic shielding barrel, and the fixing component penetrates through the hole and abuts to the fixing base. This brain magnetism scanning apparatus makes the guide rail component be independent of the magnetism shielding barrel and sets up, has avoided the vibration transmission of guide rail component to the magnetism shielding barrel, has promoted the stability of brain magnetism acquisition signal greatly, and then the beneficial effect of assurance brain magnetism measurement accuracy nature that can be better.
Description
Technical Field
The invention relates to the technical field of magnetoencephalography, in particular to magnetoencephalography scanning equipment.
Background
The Magnetoencephalogram (MEG) is a non-invasive brain function imaging method for deducing the activity of neurons in the brain by measuring the magnetic field generated by the nerve current outside the head, has ultrahigh time resolution and higher spatial resolution, and plays an important role in the focus diagnosis of nerve and mental diseases and the research of cognitive neuroscience.
The brain magnetic field intensity is very weak, and the brain magnetic field scanning device is very sensitive to the minimum interference generated by the outside, and particularly, when a bed plate body carrying a detected person moves along a track fixed on the inner wall of the magnetic shielding cylinder body, or the body of the detected person is subjected to micro-motion and vibration inevitably. Because the shielding material of the magnetic shielding barrel is magnetic, the vibration of the magnetic shielding barrel can cause the fluctuation of a space magnetic field, the magnetic shielding barrel is very sensitive to the vibration, even the very weak vibration can also cause obvious signal noise, and the accuracy of magnetoencephalography measurement is greatly influenced.
Therefore, it is highly desirable for those skilled in the art to develop a magnetoencephalography device to solve the problem of low accuracy of magnetoencephalography caused by the generation of additional magnetic field noise in the prior art.
Disclosure of Invention
In view of the above, in order to solve the above existing problems, embodiments of the present invention provide a magnetic brain scanning apparatus, in which a fixing member is additionally disposed on a rail member of a scanning bed device, and the rail member is further disposed independently of a magnetic shielding cylinder, so as to avoid a technical problem of magnetic field signal noise caused by transmission of vibration of the rail member to the magnetic shielding cylinder.
In order to achieve the above object, an embodiment of the present invention provides a magnetoencephalography scanning device, which includes a scanning bed device, a magnetic shielding device, a magnetoencephalography detector mounted on the scanning bed device, and a magnetic stabilization configuration facilitating the magnetoencephalography detector to detect a magnetoencephalography signal; the scanning bed device comprises a bed body mechanism, a guide rail component and a fixing component for fixing the guide rail component; the magnetic shielding device comprises a magnetic shielding cylinder and a fixing base for fixing the magnetic shielding cylinder; one end of the guide rail component is abutted against the bed body mechanism, and the other end of the guide rail component extends into the magnetic shielding cylinder; the magnetic stabilization configuration comprises that a hole is formed in the magnetic shielding cylinder, and the fixing component penetrates through the hole and abuts against the fixing base.
Further, the bed body mechanism comprises a bed board body, a driving device for driving the bed board body to move, a collection box body and a control box body, wherein the collection box body and the control box body are arranged below the bed board body, and a partition plate is arranged between the collection box body and the control box body.
Further, the guide rail component includes first track and second track, first track, second track are parallel to each other, install a plurality of on the diapire of bed board body with the gyro wheel of first track, second track looks adaptation.
Further, the magnetoencephalography probe comprises a miniaturized atomic magnetometer.
Further, the hole is a hole which is formed through physical field simulation and is matched with the fixing component.
Further, the magnetic stabilization arrangement further comprises: the fixing component and the fastening piece on the bed board body are made of non-metal materials, and the shells of the collecting box body and the control box body are made of aluminum alloy materials.
Further, the magnetic stabilization arrangement further comprises: the driving device comprises a driving motor and a conveying member rotationally connected with the driving motor, and after the conveying member conveys the bed board body to the preset position of the magnetic shielding barrel, a driving power supply of the driving motor is turned off.
Further, the magnetic stabilization arrangement further comprises: a plurality of heat dissipation holes are formed in the shell of the bed body mechanism.
Furthermore, the fixing component is a plurality of supporting columns, one ends of the supporting columns are fixedly connected to the guide rail component, and the other ends of the supporting columns penetrate through the holes and are fixedly connected to the fixing base.
Further, a connecting block is arranged between the supporting column and the guide rail component, and the supporting column is fixedly connected with the guide rail component through the connecting block.
The invention has the beneficial effects that:
according to the invention, the fixing component is additionally arranged on the guide rail component of the scanning bed device, so that the guide rail component is arranged independently of the magnetic shielding barrel, the vibration of the guide rail component is prevented from being transmitted to the magnetic shielding barrel, particularly, the fixing component penetrates through the hole formed in the magnetic shielding barrel and abuts against the fixing base, the non-contact between the guide rail component and the magnetic shielding barrel is further ensured, the vibration caused by a bed board body and a detected person is prevented from being transmitted to the magnetic shielding barrel, the magnetic shielding barrel does not vibrate due to external environmental factors, the magnetic field fluctuation and the gradient magnetic field are avoided, the stability of a magnetoencephalography acquisition signal is guaranteed, and the magnetoencephalography measurement accuracy can be better ensured.
Moreover, in order to avoid generating additional magnetic field noise interference, the invention further limits that the fastening piece on the bed board body (namely the movable part of the scanning bed device) is made of non-metal materials (such as nylon screws, glass fiber supporting frames and the like), and the box body shells of the acquisition box body and the control box body are made of aluminum alloy materials and are arranged for shielding the interference of the high-frequency electromagnetic field; furthermore, mutual magnetic field interference generated between the scanning bed circuit and the acquisition circuit of the magnetoencephalography detector is avoided through the separation arrangement of the acquisition box body and the control box body.
In addition, the invention has the beneficial effects that the driving power supply of the driving motor is turned off after the bed board body is conveyed to the preset position of the magnetic shielding cylinder body through the conveying component, so that the magnetic scanning bed can achieve the complete power-off dormancy in the process of brain magnetic scanning, and the introduction of magnetic noise is avoided.
Drawings
The following drawings are included to provide a further understanding of the invention, are incorporated in and constitute a part of this application, and are provided for illustrative purposes only and are not intended to limit the scope of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a magnetic brain scanning apparatus in an embodiment of the present application;
FIG. 2 is a schematic perspective view of a scanning bed apparatus according to an embodiment of the present application;
FIG. 3 is a sectional view of a magnetic flux density pattern in a magnetic shield cylinder;
FIG. 4 is a schematic diagram of the internal structure of an atomic magnetometer on a magnetoencephalography device in another embodiment of the present application;
fig. 5 is a schematic longitudinal sectional view of the pump in fig. 4.
Reference numerals:
10. a bed board body; 11. a roller; 12. a magnetoencephalography detector; 120. an alkali metal atom gas cell; 1201. a total reflection mirror; 121. a pump light source assembly; 122. detecting a light source assembly; 123. a photodetection component; 124. a second reflector; 125. a third reflector; 126. a first reflector; 127. detecting a light path; 128. a first optical path; 129. a second optical path; 13. a subject; 14. a drive power supply; 2. a rail member; 21. a first track; 22. a second track; 3. a fixing member; 30. connecting blocks; 4. a control box body; 5. a collection box body; 6. a magnetic shielding cylinder; 60. a hole; 61. a cartridge holder; 7. a fixed base; 601. a first hole; 602. a second hole; 603. an inner surface of the magnetic shielding cylinder; 604. a central region of interest.
Detailed Description
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
It should be noted that, unless the directions indicated are individually defined, the directions of up, down, left, right, etc. referred to herein are based on the directions of up, down, left, right, etc. shown in fig. 2 of the embodiment of the present application, and if the specific posture is changed, the directional indication is changed accordingly. As used herein, the terms "first," "second," and the like, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Further, in the various embodiments of the present disclosure, the same or similar reference numerals denote the same or similar components.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "connected" may be fixedly connected, detachably connected, or integral, unless otherwise expressly stated or limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the scope of the present invention as claimed.
Example one
Referring to fig. 1, a schematic structural diagram of a magnetic brain scanning apparatus is shown, in this embodiment, the magnetic brain scanning apparatus includes a scanning bed device and a magnetic shielding device, where the scanning bed device includes a bed body mechanism, a guide rail member 2 and a fixing member 3 for fixing the guide rail member 2; the magnetic shielding device comprises a magnetic shielding cylinder 6 and a fixing base 7 for fixing the magnetic shielding cylinder 6; wherein, the one end butt of guide rail component 2 in this embodiment is on the bed body mechanism, and the other end stretches into in the magnetism shielding barrel 6, has seted up the hole 60 on the magnetism shielding barrel 6, and the fixed component 3 passes the hole 60 butt on unable adjustment base 7.
It should be noted that the magnetic shielding cylinder in this embodiment is used for shielding an external magnetic field, and the magnetic shielding cylinder is fixedly connected to the fixed base through the crescent cylinder bracket 61. Specifically, adjacent materials of the magnetic shielding barrel body from inside to outside sequentially and respectively adopt high-permeability magnetic materials and high-conductivity conductive materials, non-magnetic materials are adopted between every two layers for isolation and filling, detachable end covers are installed on two sides of the magnetic shielding barrel body, a coil framework is concentrically installed in the magnetic shielding barrel body, and a three-dimensional compensation coil is installed on the coil framework. However, in order to avoid the interference of the guide rail member to the magnetic shielding cylinder, in this embodiment, a hole is formed in the lower cylinder wall of the magnetic shielding cylinder, so that the fixing member passes through the hole to be fixedly connected to the fixing base, and the connection mode is preferably, but not limited to, a threaded stud detachable and fixed connection.
Further, the hole 60 in this embodiment is formed through physical field simulation calculation, and only slightly affects some magnetic field distributions around the hole, and does not affect the magnetic field distribution in the magnetic shielding cylinder, so as to ensure that no influence is exerted on the middle region of interest, which is a human head magnetoencephalography detection region (a spatial position region of the magnetoencephalography detector 12 in the magnetic shielding cylinder) in this application. Specifically, in conjunction with the cross-sectional profile of the magnetic flux density mode in the magnetic shielding cylinder shown in fig. 3, in the inner surface 603 of the magnetic shielding cylinder, the values on each distribution line represent the magnetic flux density mode in this region, and the unit of the magnetic flux density mode is: nT, 2.87nT, 2.83 nT, 2.73 nT, 2.95 nT, 2.91 nT, 21.9nT, 39.3nT, respectively, for a geomagnetic field (beijing area) of 54838nT, the magnitudes of the magnetic flux density modes at the first hole 601 and the second hole 602 opened in the magnetic shield cylinder are only 21.9nT and 39.3nT, respectively, and the magnitude of the magnetic flux density mode at the middle region of interest 604 is about 2.8 nT. That is to say, the hole that is set up through physical field simulation calculation in this embodiment not only can fully realize that the guide rail component is set up independently from the magnetism shielding barrel, when avoiding the beneficial effect that the vibration of guide rail component transmits the magnetism shielding barrel, but also does not have any influence to the magnetic field distribution of the middle region of interest in the magnetism shielding barrel, and then ensures accuracy, the accuracy of the collection of the middle region of interest's brain magnetic signal in the magnetism shielding barrel magnetic field.
Referring to the schematic structural diagram of fig. 1, according to the technical solution of the present embodiment, firstly, a subject 13 lies on a bed plate body 10 of a bed mechanism, so that the head of the subject enters a magnetoencephalography detector 12; referring to fig. 2, the driving power supply 14 of the driving device of the bed body mechanism is then started, and at this time, the driving motor of the driving device rotates to drive the bed plate body 10 to move in the axial direction into the magnetic shielding cylinder 6, so as to send the subject to the predetermined region in the magnetic shielding cylinder, thereby performing magnetoencephalography. Before the magnetoencephalography measurement is carried out, the driving power supply 14 is turned off, so that the complete power-off dormancy can be achieved in the magnetoencephalography measurement process, and the introduction of magnetic noise is avoided.
More noteworthy is that, this embodiment is through add fixed component on the guide rail component at the scanning bed device, and then make the guide rail component be independent of the magnetism shielding barrel and establish, the vibration transmission to the magnetism shielding barrel of having avoided the guide rail component, especially the hole butt that the fixed component passed the magnetism shielding barrel and seted up is on unable adjustment base, the contactless of guide rail component with the magnetism shielding barrel has further been ensured, the vibration transmission to the magnetism shielding barrel of having avoided bed board body and examined person to cause, the signal to noise ratio has been promoted greatly, and then the beneficial effect of assurance brain magnetism measurement accuracy nature that can be better.
Example two
With reference to fig. 1 and 2, in this embodiment, on the basis of the first embodiment, as a preferred implementation manner, the bed body mechanism in this embodiment further includes a collection box 5 and a control box 4 disposed below the bed board body 10, wherein a partition board is disposed between the collection box 5 and the control box 4, so that the two boxes are separately arranged, and mutual magnetic field interference between the scanning bed control circuit and the collection circuit is avoided.
As a preferred embodiment, the shells of the collection box 5 and the control box 4 in this embodiment are preferably, but not limited to, made of aluminum alloy, and may also be made of permalloy or iron-aluminum alloy according to practical situations, because the magnetic permeability μ of the enclosure is much larger than the magnetic permeability μ of air, most of the magnetic field lines pass through the wall of the enclosure, and the magnetic induction lines in the cavity in the enclosure are few, so as to achieve the purpose of shielding the interference of the high-frequency electromagnetic field.
As a preferred embodiment, the housing of the bed mechanism in this embodiment is provided with a plurality of heat dissipation holes, the heat dissipation holes are preferably, but not limited to, disposed on the housing below the bed board body, and the air flow enters from the gap of the housing and is discharged from the heat dissipation holes, so as to avoid magnetic field interference caused by poor heat dissipation of the air flow.
As a preferred embodiment, the fixing members and the fastening members on the bedplate body 10 in this embodiment are made of non-metallic materials, such as nylon screws, glass fiber supports, etc., so as to avoid generating additional magnetic noise when the fastening members are subjected to friction.
As a preferred embodiment, in this embodiment, the hole is preferably but not limited to a cylindrical hole, the diameter of the cross section of the cylindrical hole is not greater than 5% of the inner diameter of the innermost layer of the magnetic shielding cylinder, the difference of the radii of the cross sections of the support column and the hole is between 1mm and 5mm, and the hole is further preferably set to be 2% of the inner diameter of the innermost layer of the magnetic shielding cylinder, so that the working requirement of the miniaturized atomic magnetometer is fully satisfied without being affected.
EXAMPLE III
Referring to fig. 2, in the present embodiment, on the basis of the first embodiment and the second embodiment, as a preferable embodiment, the rail member 2 in the present embodiment includes a first rail 21 and a second rail 22, and the two rails are parallel to each other. The rollers 11 which are arranged on the bottom wall of the bed board body 10 and matched with the first rail and the second rail roll on the two rails, so that the bed board body can move more stably.
As a preferred embodiment, the fixing member 3 in the present embodiment is preferably, but not limited to, four support columns, and may be set to other numbers of support columns, such as six, eight, etc., according to practical situations. Two support columns are respectively symmetrical on each guide rail, namely one end of each first support column and one end of each second support column are fixedly connected to the first rail 21, and the other end of each first support column and one end of each second support column penetrate through the holes 60 and are fixedly connected to the fixed base 7; one end of the third supporting column and one end of the fourth supporting column are fixedly connected to the second rail 22, and the other ends of the third supporting column and the fourth supporting column penetrate through the holes 60 and are fixedly connected to the fixed base 7. Further, the supporting column and the guide rail in this embodiment are fixedly connected through a connecting block 30.
It should be noted that, in this embodiment, the connecting block is a block-shaped body whose width is not greater than the width of the rail and is not less than the maximum diameter of the cross section of the supporting column, a first threaded hole is disposed in the middle of the block-shaped body, at least one second threaded hole is symmetrically disposed at two ends of the block-shaped body along the axial direction of the rail, one end of the supporting column is a stud adapted to the first threaded hole, and a third threaded hole corresponding to the second threaded hole is disposed on the rail member. This embodiment twist soon through the double-screw bolt of the one end of this support column in first screw hole, and twist soon in second, three threaded hole through holding screw, realize support column and guide rail component's firm connection, further ensured guide rail component be independent of magnetism shielding barrel, make its contactless each other to better avoid the vibration transmission to magnetism shielding barrel that bed board body and examined person cause, further guaranteed the beneficial effect of brain magnetism measurement accuracy nature.
In addition, as shown in fig. 2, in the present embodiment, a fixing component for fixing the fixing member 3 is installed at one end of the fixing member 3 close to the fixing base 7, so as to avoid the influence of the shearing force caused when the bed board body moves on the horizontal direction of the rail member 2. The fixing component is preferably but not limited to a mushroom-shaped connecting column, the large end of the mushroom-shaped connecting column is fixedly connected with the fixing base through a fastening stud, and the small end of the mushroom-shaped connecting column is fixedly connected with the supporting column through a fastening screw. Further, between unable adjustment base 7 and the fixed part in this embodiment, soft connecting part has all been placed between curved barrel support 61 and the magnetism shielding barrel 6 to the influence of the vibration that slows down unable adjustment base transmission and come to the magnetism shielding barrel. The soft connecting component is preferably but not limited to a rubber shock pad which is a composite product of rubber and metal. Above-mentioned fixed part, soft adapting unit's characteristic sets up, and messenger's magnetism shielding barrel that can be better does not produce the vibration because of external environment factor, avoids bringing magnetic field fluctuation and gradient magnetic field, guarantees the stability of brain magnetism acquisition signal to the beneficial effect of the brain magnetism measurement accuracy nature of better assurance brain magnetism scanning apparatus.
Example four
In this embodiment, on the basis of the first embodiment, the second embodiment and the third embodiment, as a preferred implementation manner, the magnetoencephalography detector 12 in this embodiment includes a detection helmet, and a plurality of slots arranged in an array are formed on the detection helmet, and a miniaturized atomic magnetometer is installed on the slot, and the miniaturized atomic magnetometer is an important component of the magnetic stabilization configuration in this application, that is, the magnetic stabilization configuration includes a miniaturized atomic magnetometer.
Further, as shown in fig. 4, the schematic internal three-dimensional structure of the miniaturized atomic magnetometer includes an alkali metal atom gas chamber 120, a pumping light source assembly 121, a detection light source assembly 122, and a photoelectric detection assembly 123, a pumping light path emitted by the pumping light source assembly 122 is perpendicular to a detection light path emitted by the detection light source assembly 122, detection laser of the detection light path 127 passes through the alkali metal atom gas chamber 120 and enters the photoelectric detection assembly 123, and the pumping light source assembly 121, the detection light source assembly 122, and the photoelectric detection assembly 123 are spatially and three-dimensionally arranged and are all located at the same side position of the alkali metal atom gas chamber 120; the pump optical path includes a first optical path 128 and a second optical path 129 that returns along the first optical path.
Specifically, the meaning of the spatial arrangement of the present embodiment can be better understood with reference to fig. 4, that is, the pump light source assembly 121, the detection light source assembly 122 and the photoelectric detection assembly 123 are all located at the left side position of the alkali metal atom gas chamber 120, the detection light source assembly 122 is located at the front upper side of the pump light source assembly 121, and the photoelectric detection assembly 123 is located at the rear upper side of the pump light source assembly 121; further, a first mirror 126 provided on the pumping optical path in the present embodiment is located right below the alkali metal atom gas cell 120, and a second mirror 124 and a third mirror 125 provided on the detection optical path 127 are located right in front of and right behind the alkali metal atom gas cell 120, respectively; the detection light source assembly 122, the second reflector 124, the alkali metal atom gas chamber 120, the third reflector 125 and the photoelectric detection assembly 123 are positioned on the same transverse plane, and the detection light path of the detection light source assembly 122 sequentially passes through the second reflector 124, the alkali metal atom gas chamber 120, the third reflector 125 and the photoelectric detection assembly 123; the pump light source assembly 121, the first reflecting mirror 126 and the alkali metal atom gas cell 120 are located on the same vertical plane.
It should be noted that the atomic magnetic force in this embodiment is a rectangular parallelepiped structure, and the arrangement of the internal structure enables the bottom surface to be a detection magnetic induction surface directly contacting with the scalp of a person; the pump light source component comprises a pump laser for emitting pump light beams and a pump optical element; the detection light source assembly includes a detection laser emitting detection laser light and a detection optical element.
The atomic magnetometer in the embodiment adopts the reasonable and ingenious structural design of spatial three-dimensional arrangement, and particularly, through the arrangement of the first reflector, the second reflector and the third reflector, two light source components which should be directly vertical to each other can be placed at the same side of the alkali metal atom air chamber, so that the miniaturization design can be fully realized; and the magnetic sensitivity direction to be detected is along the radial direction of the scalp, namely, the detection magnetic induction surface positioned on the bottom surface of the atomic magnetometer is directly contacted with the scalp, so that more atomic magnetometers can be distributed on the scalp, the multi-channel detection of the magnetoencephalography is better realized, and the detection quality of the magnetoencephalography scanning equipment is greatly improved.
Furthermore, as shown in fig. 5, a total reflection mirror 1201 is disposed on one side surface of the alkali metal atom gas chamber 120 in the present embodiment, and the total reflection mirror 1201 is located on the other side of the alkali metal atom gas chamber 120 opposite to the first reflection mirror 126, so that the first stroke light of the first light path 128 returns along the route of the first light path to form a second light path 129 under the total reflection effect of the total reflection mirror, and the second stroke light of the second light path 129 returned by the total reflection enters the alkali metal atom gas chamber, thereby implementing a secondary return compensation polarization on the alkali metal atoms.
From this, this embodiment has increased the stroke of pumping light beam in the atom air chamber finite volume undoubtedly for the one-way light beam that adopts among the prior art through the miniaturized atom magnetometer that adopts to have to come and go double-circuit light beam, has ensured the interior atomic absorption energy of atom air chamber and has produced the energy level transition, improves the degree of consistency and the detectivity of atom magnetometer of atomic polarizability greatly, and then has promoted the detection efficiency and the detection quality of brain magnetism greatly, and then reaches the detection precision that improves brain magnetism scanning apparatus.
In conclusion, the fixing component is additionally arranged on the guide rail component of the scanning bed device, so that the guide rail component is arranged independently of the magnetic shielding barrel, the vibration of the guide rail component is prevented from being transmitted to the magnetic shielding barrel, particularly, the fixing component penetrates through the hole formed in the magnetic shielding barrel and abuts against the fixing base, the non-contact between the guide rail component and the magnetic shielding barrel is further guaranteed, the vibration caused by the bed board body and the detected person is prevented from being transmitted to the magnetic shielding barrel, the signal to noise ratio is greatly improved, and the beneficial effect of ensuring the accuracy of magnetoencephalography measurement can be better achieved.
Moreover, in order to avoid generating additional magnetic field noise interference, the invention further limits that the fastening piece on the bed board body (namely the movable part of the scanning bed device) is made of non-metal materials (such as nylon screws, glass fiber supporting frames and the like), and the box body shells of the acquisition box body and the control box body are made of aluminum alloy materials and are arranged for shielding the interference of the high-frequency electromagnetic field; furthermore, mutual magnetic field interference generated between the scanning bed circuit and the acquisition circuit of the magnetoencephalography detector is avoided through the separation arrangement of the acquisition box body and the control box body.
In addition, the invention has the beneficial effects that the driving power supply of the driving motor is turned off after the bed board body is conveyed to the preset position of the magnetic shielding cylinder body through the conveying component, so that the magnetic scanning bed can achieve the complete power-off dormancy in the process of brain magnetic scanning, and the introduction of magnetic noise is avoided.
Furthermore, the brain magnetic detector is arranged on the bed board body, and the miniaturized atomic magnetometers arranged in a plurality of arrays are arranged on the brain magnetic detector, so that the multichannel detection of the brain magnetic can be better realized, and the detection quality of the brain magnetic scanning equipment is greatly improved particularly when the brain magnetic detector is applied to a magnetic shielding environment which is set up by a guide rail component independently of a magnetic shielding cylinder.
While the above description shows and describes the preferred embodiments of the application, it is to be understood, as noted above, that the application is not limited to the forms disclosed herein, but is not intended to be exhaustive of other embodiments, and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the subject matter disclosed above, as determined by the teachings or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (10)
1. The brain magnetic scanning equipment is characterized by comprising a scanning bed device, a magnetic shielding device, a brain magnetic detector arranged on the scanning bed device and a magnetic stabilization configuration which is beneficial for the brain magnetic detector to detect brain magnetic signals;
the scanning bed device comprises a bed body mechanism, a guide rail component and a fixing component for fixing the guide rail component;
the magnetic shielding device comprises a magnetic shielding barrel and a fixed base for fixing the magnetic shielding barrel, one end of the guide rail component is abutted against the bed body mechanism, and the other end of the guide rail component extends into the magnetic shielding barrel;
the magnetic stabilization configuration comprises that a hole is formed in the magnetic shielding cylinder, and the fixing component penetrates through the hole and abuts against the fixing base.
2. The apparatus according to claim 1, wherein the bed mechanism comprises a bed plate body, a driving device for driving the bed plate body to move, and a collection box and a control box disposed below the bed plate body, and a separation plate is disposed between the collection box and the control box.
3. The apparatus according to claim 2, wherein the rail member comprises a first rail and a second rail, the first rail and the second rail are parallel to each other, and a plurality of rollers are mounted on the bottom wall of the bed plate body and are matched with the first rail and the second rail.
4. The magnetoencephalography device of claim 1, wherein said magnetoencephalography detector comprises a miniaturized atomic magnetometer.
5. The apparatus according to claim 1, wherein the hole is a hole adapted to the fixing member by physical field simulation.
6. The magnetoencephalography device of claim 2, wherein said magnetic stabilization arrangement further comprises: the fastener material on the bed board body is non-metallic material, and the shell of gathering the box, control box all adopts aluminum alloy material.
7. The magnetoencephalography device of claim 2, wherein said magnetic stabilization arrangement further comprises: the driving device comprises a driving motor and a conveying member rotationally connected with the driving motor, and after the conveying member conveys the bed board body to the preset position of the magnetic shielding barrel, a driving power supply of the driving motor is turned off.
8. The magnetoencephalography device of claim 1, wherein said magnetic stabilization arrangement further comprises: a plurality of heat dissipation holes are formed in the shell of the bed body mechanism.
9. The apparatus according to claim 1, wherein the fixing member is a plurality of support pillars, one end of each support pillar is fixedly connected to the rail member, and the other end of each support pillar passes through the hole and is fixedly connected to the fixing base.
10. The apparatus according to claim 9, wherein a connection block is provided between the support column and the rail member, and the support column is fixedly connected to the rail member through the connection block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210785662.9A CN114847953B (en) | 2022-07-06 | 2022-07-06 | Brain magnetic scanning equipment |
Applications Claiming Priority (1)
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