Support-free brain magnetic detection system

Abstract

The unsupported brain magnetic detection system comprises a magnetic shielding cabin and a scanning bed which are separated from each other, a supporting structure used for supporting the scanning bed to be horizontally suspended is arranged at the end, away from the magnetic shielding cabin, of the scanning bed, and the suspended side of the scanning bed corresponds to an inlet of the magnetic shielding cabin; the supporting structure is fixedly connected with a moving device fixed on the base plane, and the moving device drives the scanning bed to linearly move in and out of the magnetic shielding cabin through the supporting structure. According to the unsupported brain magnetic detection system, the magnetic shielding cabin and the scanning bed are of a separated structure, the scanning bed is suspended in the air in an unsupported mode after entering the magnetic shielding cabin, physical isolation of the scanning bed and the magnetic shielding cabin is achieved, and therefore the situation that holes are formed in the magnetic shielding cabin, and structures such as supporting columns and running rails are manufactured is avoided; the structural complexity of the magnetic shielding cabin is greatly reduced, the magnetic shielding performance is ensured, and magnetic field fluctuation caused by vibration of a scanning bed and a person is avoided.

Description

Technical Field

[0001] This invention relates to the field of magnetoencephalography (MEG) detection technology, specifically to a supportless MEG detection system. Background Technology

[0002] Magnetoencephalography (MEG) is a functional brain imaging technique that detects the weak magnetic fields generated by neural electrical signals. It has wide applications in clinical practice and scientific research, including the diagnosis and localization of neurological diseases such as epilepsy, biomarker research for mental illnesses, preoperative localization of brain functional areas, and brain cognitive neuroscience research.

[0003] Horizontal magnetoencephalography (MEG) systems typically use a scanning bed to move the patient to the shielded chamber scanning area for MEG data acquisition. Because the scanning bed needs to be aligned with the center of the shielded chamber, and because the scanning bed is relatively long, the shielded chamber is also quite deep. Therefore, support columns and running tracks need to be provided inside the chamber for the scanning bed. This inevitably leads to damage to the magnetic shielding and affects operational stability. Furthermore, the scanning bed can transmit external vibrations to the shielded chamber, resulting in degraded data quality. Figure 1 As shown, physical magnetic field simulation of a traditional magnetic shielding chamber reveals a significant residual magnetic field (red portion) at the opening boundary. Although limiting the location of the uniform region can mitigate its impact on the optimal signal acquisition area to some extent, the opening of the hole will obviously cause differences in the uniformity of the magnetic field inside the chamber, making active compensation difficult.

[0004] Furthermore, the limited space of the scanning bed restricts the expansion of the number of channels, and the internal cables bend and twist within the cable chain as the bed moves, resulting in signal interference due to wear of the cable shielding layer. Summary of the Invention

[0005] This invention provides a supportless magnetic brain detection system to solve the problems of unstable information transmission and poor data quality caused by the integrated structure of the scanning bed and magnetic shielding chamber in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A supportless magnetic brain imaging system includes a separate magnetic shielding chamber and a scanning bed. The scanning bed has a support structure at one end away from the magnetic shielding chamber to support the scanning bed in a horizontally suspended position. The suspended side of the scanning bed corresponds to the inlet of the magnetic shielding chamber. The support structure is fixedly connected to a moving device fixed on a base surface. The moving device drives the scanning bed to make linear movements in and out of the magnetic shielding chamber through the support structure.

[0007] Furthermore, the longitudinal deformation of the scanning bed at its maximum length position does not exceed 30 mm.

[0008] Furthermore, a brain data acquisition device is provided at one end of the scanning bed where the magnetic detector enters, and a wiring compartment is provided inside the scanning bed, through which communication cables and wires pass for data and power transmission between the electronic equipment on the support side of the scanning bed and the brain data acquisition device.

[0009] Furthermore, the support structure is provided with a first connecting surface that is fixedly connected to the scanning bed, and the scanning bed is provided with a second connecting surface that fits against the first connecting surface. The connecting surface and the scanning bed are fixed together by a number of fastening bolts.

[0010] Furthermore, the support structure has a receiving space, and the receiving space contains at least one of the following: information acquisition equipment, system control equipment, data interaction equipment, and system power supply equipment.

[0011] Furthermore, the support structure includes an outer shell and a support frame. The support frame includes a base plate. At least two longitudinal supports are provided on both sides of the base plate. A transverse support is provided at the top of the support structure to connect all the longitudinal supports on the same side. A support cross plate fixedly connected to the scanning bed is provided between the transverse supports. Several cross beams are provided between the longitudinal supports on both sides.

[0012] Furthermore, the moving device includes a linear drive module and a base frame. The linear drive module includes a drive motor, a lead screw, and a lead screw sleeve. The drive motor and the lead screw are both fixed on the base frame. The lead screw sleeve is fitted onto the lead screw and is fixedly connected to the support structure. The base frame includes a base plate for connecting the moving device to the base surface. The bottom surface of the support structure is wider than the base frame. Support auxiliary structures are provided on both sides of the base plate. During the entire movement of the support structure, the support auxiliary structures and the support structure are in a linear or surface connection.

[0013] Furthermore, the linear drive module is provided with a sliding support structure on one or both sides. The sliding support structure includes a slide rail that is fixed at both ends to the base frame and is horizontally arranged. A slider is provided on the slide rail, and the slider is fixedly connected to the support structure.

[0014] Furthermore, at least two sliders are provided on the same sliding support structure, and the sliders connect the front and rear sides of the support structure.

[0015] Furthermore, both ends of the moving device are equipped with limiting devices. The limiting devices include fixed pulleys and inclined surfaces on the support structure. Pressure sensors are provided on the inclined surfaces. When the support structure reaches the position, the inclined surfaces will squeeze the fixed pulleys, and the fixed pulleys will squeeze the pressure sensors in the opposite direction. The movement limit of the support structure is determined based on the signal change of the pressure sensors.

[0016] The present invention has the following advantages: This invention provides a supportless magnetoencephalography (MEG) detection system that separates the magnetic shielding chamber from the scanning bed. The scanning bed floats unsupported in the air after entering the magnetic shielding chamber, achieving physical isolation between the two. This avoids the need for openings, support columns, and running tracks in the magnetic shielding chamber, significantly reducing its structural complexity. Furthermore, the absence of openings better ensures the shielding performance of the data acquisition area within the magnetic shielding chamber is not contaminated by the environment. This opening-free magnetic shielding chamber employs a multi-layered, unequal-spacing design. This unequal-spacing design is the result of optimization after considering multiple factors such as shielding chamber performance, net usable size, and economic considerations, and setting these as constraints in physical field simulation. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 A simulation diagram of the physical magnetic field used in a traditional magnetic shielding chamber; Figure 2 A product structure diagram of an unsupported magnetoencephalography (MEG) detection system provided in an embodiment of the present invention; Figure 3 This is an internal structural diagram of an unsupported magnetic brain detection system provided in an embodiment of the present invention. The brain data acquisition device inside the magnetic shielding chamber is used to show the position of the brain data acquisition device after the scanning bed is fully inserted into the magnetic shielding chamber. Figure 4 This is an assembly diagram of a scanning bed, support structure, and moving device in an unsupported magnetoencephalography (MEG) detection system provided in an embodiment of the present invention. Figure 5 This is an internal structural diagram of the connection between the support structure and the mobile device in an unsupported magnetoencephalography (MEG) detection system provided in an embodiment of the present invention. Figure 6 This is a top view of a mobile device in an unsupported magnetoencephalography (MEG) detection system provided in an embodiment of the present invention.

[0020] In the picture: 1-1. Magnetic shielding chamber; 1-2. Internal air outlet; 2-1. Scanning bed; 2-2. Brain data acquisition device; 2-3. Acquisition container; 2-4. Mirror; 2-5. Triangular connector; 3-1. Supporting structure; 3-2. Accommodation space; 3-3. Base plate; 3-4. Longitudinal support; 3-5. Crossbeam; 3-6. Lateral support; 3-7. Supporting crossbeam; 3-8. Reinforcing crossbeam; 3-9. Projector; 3-10. Fan bracket; 4-1. Moving device; 4-2. Drive motor; 4-3. Lead screw; 4-4. Lead screw sleeve; 4-5. Base plate; 4-6. Supporting auxiliary structure; 4-7. Base frame stiffener; 4-8. Slide rail; 4-9. Slider; 4-10. Limiting device. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0022] like Figure 2-3 As shown, an unsupported magnetic brain imaging (MBE) system includes a magnetic shielding chamber 1-1 and a scanning bed 2-1, wherein the magnetic shielding chamber 1-1 and the scanning bed 2-1 are separate structures. 1. Magnetic shielding cabin This technology eliminates the need for tracks, support planes, and openings within the magnetic shielding chamber 1-1, providing a clear airflow channel. The airflow channel is housed within the chamber wall of the magnetic shielding chamber 1-1 and contains a fan. The internal air outlet 1-2 of the airflow channel is located inside the magnetic shielding chamber 1-1, below the scanning bed 2-1. Preferably, the internal air outlet 1-2 is positioned below the magnetoencephalography (MEG) data acquisition device 2-2 after the scanning bed 2-1 has fully entered the magnetic shielding chamber 1-1, providing active cooling for the MEG data acquisition device and fresh air for the user. The external air outlet of the airflow channel can be located on the outer wall of the magnetic shielding chamber 1-1, thus forming an air duct connecting the inside and outside of the magnetic shielding chamber 1-1. The internal air outlet 1-2 is designed as an array of waist-shaped holes, ensuring both ventilation volume and uniformity, providing a relatively constant temperature environment for the detector array, and improving user comfort.

[0023] 2. Scanning bed The scanning bed 2-1 is constructed from a non-magnetic, high-strength solid material. The remanence of this material must not exceed 0.5 nT; lower remanence is better. This technology preferably uses carbon fiber as the bed substrate. Since the deformation of the bed affects the position of the detector array from the optimal signal acquisition area, excessive deviation can lead to poor signal quality. Therefore, under the constraint of no internal support, this technology adjusts the bed thickness to minimize the deformation of the bed's final load along its maximum length, i.e., the longitudinal deformation does not exceed 30 mm. This ensures that the detector array operates within the optimal signal acquisition area of ​​the magnetically shielded chamber 1-1. Furthermore, this technology designs the scanning bed 2-1 with an internally hollowed-out core, incorporating honeycomb, grid, or cylindrical perforated elements to minimize weight while maintaining bed strength. Based on the technology of controllable bed deformation of scanning bed 2-1, the scanning device is made into a magnetically shielded chamber 1-1 without a supporting structure 3-1. This allows the patient to be sent into the optimal signal acquisition area inside the chamber without the need for guide rails, thus achieving complete decoupling between scanning bed 2-1 and the shielded chamber. Without rails, there is no need to drill holes or install support columns in the magnetically shielded chamber 1-1, which not only reduces the complexity of the structural design but also better ensures that the shielding performance of the data acquisition area inside the magnetically shielded chamber 1-1 is not contaminated by the environment. Throughout the entire design, manufacturing, installation, and use process, scanning bed 2-1 and magnetically shielded chamber 1-1 are completely out of contact. This avoids external vibrations being transmitted to the shielded chamber through scanning bed 2-1 or supporting structure 3-1, preventing data quality degradation caused by disturbance of the acquisition environment.

[0024] A brain data acquisition device 2-2 is installed at one end of the scanning bed 2-1 connected to the magnetic detector. A cabling compartment is provided inside the scanning bed 2-1, through which communication cables and wires pass for data and power transmission between the electronic equipment on the support side of the scanning bed 2-1 and the brain data acquisition device 2-2. The cabling compartment and the bed board are integrated. The brain data acquisition device 2-2 includes a magnetic detector array module, a magnetic brain magnetic data acquisition and processing module, and an acquisition container 2-3. The acquisition container 2-3 is fixedly connected to the scanning bed 2-1. The acquisition container 2-3 has an inwardly recessed cavity for the subject's head to be inserted. Several small grooves are provided in the cavity for the magnetic detector array module to be inserted into. The detection end of the magnetic detector array module is inserted into the small grooves. The magnetic detector array module is connected to the brain data acquisition and processing module. Wires and communication cables within the cabling compartment enable communication and power supply between the external electronic equipment of the scanning bed 2-1 and the internal magnetic detector array module and magnetic brain magnetic data acquisition and processing module. Because the positions of the magnetoencephalogram (MEG) data acquisition and processing module and the magnetic detector array module are relatively fixed in this technology and do not undergo relative displacement due to bed movement, the acquisition cables between the two will not experience relative movement. This will prevent damage to the cables or their shielding layers due to wear or vibration, thus completely solving the problem of signal interference and data contamination caused by cable wear and ensuring the quality of data acquisition.

[0025] Since each channel of the magnetic detector array needs to communicate with the magnetoencephalography (MEG) data acquisition and processing module, in conventional MEG, the acquisition and processing module is located below the bed board 2-1, and the acquisition device 2-2 is installed at the front end of 2-1. Because the acquisition and processing module is stationary, but the acquisition device 2-2 enters the shielding cylinder, a relative distance is created between them. This necessitates the use of a cable chain structure, which limits the space between the bed board and the bed frame, making it difficult to increase the number of channels. In contrast, this technology eliminates the relative displacement between the acquisition and processing module and the acquisition device, allowing for direct cable connection and eliminating the need for a cable chain, thus completely overcoming the channel limitation. This also avoids cable wear and improves system reliability. Another advantage of not using a cable chain is that it shortens the transmission path. Since there is no relative displacement between the magnetic detector array and the magnetoencephalography (MEG) data acquisition and processing module, the cable length is equal to the travel plus the fixed connection length. The travel is determined by the position of the MEG acquisition area inside the magnetic shielding cylinder. In contrast, conventional MEG using a cable chain results in a cable length that is 1.5 to 2 times the travel due to constraints such as the installation height, fixed end offset, bending radius, and redundant length within the cable chain. Therefore, using a supportless scanning device can minimize the detection data transmission path.

[0026] 3. Supporting structure like Figure 4As shown, the scanning bed 2-1 is provided with a support structure 3-1 at one end away from the magnetic shielding chamber 1-1 for supporting the scanning bed 2-1 to be horizontally suspended. The suspended side of the scanning bed 2-1 corresponds to the inlet of the magnetic shielding chamber 1-1.

[0027] The support structure 3-1 has a first connecting surface that is fixedly connected to the scanning bed 2-1. The scanning bed 2-1 has a second connecting surface that fits against the first connecting surface, maximizing the connection area between the two. The connecting surface and the scanning bed 2-1 are fixed together by several fastening bolts, distributing the internal tensile force of the connection evenly across the bolts to ensure a stable connection between the scanning bed 2-1 and the support structure 3-1. A triangular connector 2-5 is provided at the connection point between the scanning bed 2-1 and the support structure 3-1 to increase the contact area at the connection point, thereby better ensuring the load-bearing capacity of the bed and the rigidity of the bed board. Since this location is far from the opening of the magnetic shielding chamber 1-1 during data acquisition, the triangular connector 2-5 can be made of high-strength materials such as carbon steel. Its shape can be finely adjusted according to the final appearance of the system, such as increasing the contact area or adding rounded corners.

[0028] The supporting structure 3-1 contains a receiving space 3-2, which houses at least one of the following: information acquisition equipment, system control equipment, data interaction equipment, and system power supply equipment. The receiving space 3-2 contains all or most of the modules required for the operation of the magnetoencephalography (MEG) detection system. At its simplest level, it includes: a MEG data acquisition and processing module, a synchronization control box and other control circuits, and user interface-related application components. The MEG data acquisition and processing module not only processes MEG array data but also supports the user interface. Combined with the synchronization trigger box, it marks data types and user-defined functions, and associates the marked types with the acquired MEG signals. Data from each module is processed uniformly by the MEG data acquisition and processing module before being transmitted to the user operating platform. This reduces the problem of multiple modules occupying communication channels, improves data transmission efficiency, and reduces the tedious operation of distinguishing and reprocessing data from different modules after receiving the data. The user receives the acquired MEG data through the operating platform, which can automatically generate a MEG acquisition report. The user can also view, edit, reprocess, and perform other advanced application operations as needed, such as source localization and accuracy analysis. Since the support structure 3-1 contains low-voltage electrical equipment, when the scanning bed 2-1 enters the magnetic shielding chamber 1-1, in order to prevent the low-voltage electrical equipment in the support structure 3-1 from being subjected to magnetic interference, a layer of copper mesh is installed inside the outer shell of the support structure 3-1 in this technology, so that the support structure 3-1 has a magnetic shielding function.

[0029] This technology integrates the magnetoencephalography (MEG) data acquisition and processing module, synchronization control box, transmission and control module, and power supply module within the support structure 3-1. It optimizes the transmission path, integrating most of the communication, control, and signal processing functions as independent modules within the support structure 3-1. System-level optimization and simplification are performed on similar functions and redundant calculations between modules, thereby improving system performance. Furthermore, these modules also function as counterweights, increasing the overall weight of the support structure 3-1 and further enhancing the stability of the connection between the support structure 3-1 and the scanning bed 2-1. Additionally, when the scanning bed 2-1 moves, these modules move synchronously with it, achieving relative stillness between the modules and the scanning bed 2-1, and thus relative stillness between these modules and the MEG data acquisition device at the other end of the scanning bed 2-1, ensuring absolute stability of data transmission.

[0030] Specifically, the support structure 3-1 includes an outer shell and a support frame. The support frame includes a base plate 3-3, with at least two longitudinal supports 3-4 on each side of the base plate 3-3. Several crossbeams 3-5 are provided between the longitudinal supports 3-4 on both sides. The top of the support structure 3-1 has transverse supports 3-6 connecting all the longitudinal supports 3-4 on the same side. Between the transverse supports 3-6 are support plates 3-7 fixedly connected to the scanning bed 2-1. The side of the support plate 3-7 that contacts the scanning bed 2-1 is the first contact surface. One end of the scanning bed 2-1 is attached to the support plate 3-7 and fixed by several fastening bolts. This hollow frame design facilitates subsequent disassembly and maintenance, and also increases internal heat dissipation.

[0031] The support plate 3-7 is horizontally fixed at the bottom of the transverse support 3-6. The height of the transverse support 3-6 is approximately the same as that of the scanning bed 2-1, that is, slightly higher, equal to, or slightly lower. A horizontally arranged reinforcing plate 3-8 is provided between the upper parts of the two transverse supports 3-6. The two ends of the reinforcing plate 3-8 are respectively fixedly connected to the two transverse supports 3-6. The reinforcing plate 3-8 is attached to the top surface of the scanning bed 2-1. The two are fixedly connected by fasteners. This structure can distribute the force of the fastening bolts on the support plate 3-7. On the other hand, other equipment can be added to the reinforcing plate 3-8, such as a manually adjustable platform with a projector 3-9 on it. A mirror 2-4 is provided above the inner cavity of the acquisition container 2-3 on the other side of the scanning bed 2-1, so that the subject can see the image emitted by the projector 3-9 through the mirror 2-4. The platform can also be equipped with a display screen. Both the projector 3-9 and the display screen are visual presentation devices that provide a medium for visual stimulation. The images presented are refracted by the mirror on top of the helmet and perceived by the subject lying in the helmet, thereby inducing a visual response and collecting various response signals for the brain magnetic resonance imaging (BMI) data.

[0032] Fan mounts 3-10 are located on both sides of the support frame, each equipped with several fans for cooling the electrical equipment within the support structure 3-1. The fan mounts 3-10 are detachably attached to the support frame with screws, facilitating subsequent maintenance of the internal electronic equipment and fan replacement. Traditional MRI devices typically employ a permeable design with airflow from one side and exhaust from the other. However, due to the symmetrical design of the support structure 3-1 in this technology, a permeable cooling method would lead to temperature differences between the two sides of the acquisition circuitry. Therefore, an exhaust vent is designed at the rear of the support structure 3-1. In actual use, the airflow pattern of the fans on both sides can be adjusted according to temperature changes within the support structure 3-1. Adjustment options include left-in-right-out, right-in-left-out, and left-right inflow with exhaust at the rear, achieving temperature balance between the left and right sides of the support structure 3-1 without creating temperature differences. The cooling fan speed can be adjusted via the cooling power adjustment function in the transmission and control module, thereby better managing the operating environment of the electronic equipment within the support structure 3-1.

[0033] The heat dissipation power adjustment can switch between manual and automatic control modes. In manual mode, a fixed fan speed is used for heat dissipation. In automatic mode, the temperature is fed back and automatically compensated by the thermal resistor preset in the support structure 3-1. The device defaults to automatic adjustment mode when it is turned on. The control module calculates the temperature by calculating the resistance change of the thermal resistor and adjusts the fan speed according to the difference from the preset temperature T0.

[0034] When designing, look up the nominal resistance value R0, linear coefficient A, and quadratic coefficient B of the selected RTD at 0°C. Assuming the current temperature is t, the resistance at that temperature can be measured as Rt according to the RTD calculation formula: Rt = R0[1 + A⋅t + B⋅t]. 2 If Rt is known, the temperature t within the support structure 3-1 can be quickly deduced. Then, by comparing the relationship between t and T0, the fan speed can be adjusted, i.e., the fan's cooling power can be adjusted. In practical applications, platinum resistance thermometers are usually chosen because they have good temperature linearity, which further simplifies the calculation process. The simplified linear formula is Rt = R0[1 + a⋅t], where a represents its temperature coefficient of resistance. For example, if PT100 is used, then a = 0.0385 / ℃. Therefore, the temperature calculation is simplified as follows:

[0035] In the automatic wind speed adjustment mode, T0 is preset, which represents the ideal working environment of the support structure 3-1. When t > T0, the heat dissipation function is activated. The automatic heat dissipation adjustment range is set to N levels. The control module sets different levels according to different temperature differences, which helps the temperature inside the support structure 3-1 to reach the ideal thermal equilibrium state more quickly.

[0036] 4. Mobile device like Figure 5-6 As shown, the support structure 3-1 is fixedly connected to the moving end of the moving device 4-1, and the stationary end of the moving device 4-1 is fixed on the base surface. The moving device 4-1 drives the scanning bed 2-1 to make linear movements in and out of the magnetic shielding chamber 1-1 through the support structure 3-1.

[0037] The mobile device 4-1 includes a base frame and a linear drive module. The base frame is the main load-bearing component and provides a track for the movement of the scanning bed 2-1 to ensure its linearity and positional accuracy. The base frame is also a fixing component, mainly serving a fixing function. Common materials used are steel, iron, and aluminum profiles. Considering the magnetic requirements of the magnetoencephalography (MEG) system, aluminum profiles are typically chosen, but austenitic stainless steel with a high molybdenum or nickel content, such as grade 316L steel, can also be used, with aluminum profiles being the preferred choice. An external data interface board is installed at the rear of the base frame, enabling internal and external communication interconnection and achieving modular and hierarchical equipment design. This not only optimizes the internal transmission path but also better optimizes system integration.

[0038] The linear drive module includes a drive motor 4-2, a lead screw 4-3, and a lead screw sleeve 4-4. In this technology, the drive motor 4-2 is equipped with a reducer to lower the rotational speed and increase the torque. It also distributes the power transmitted from the motor to the working mechanism more rationally and smoothly. The reducer bears most of the impact and vibration from the load, thus protecting the more expensive and precise motor. This transmission method not only improves operational stability but also enhances ease of use. In contrast, conventional scanning beds 2-1 typically have a fixed bed frame, and movement is achieved by a motor driving a synchronous belt or rack and pinion to move the bed plate. The bed plate moves with the bed frame and the track inside the magnetic shielding chamber 1-1 through point contact with synchronous pulleys. This approach is affected by the site, installation leveling, the roundness of the synchronous pulleys, and the flatness of the track, easily leading to significant differences in sample performance during operation. Therefore, this technology has a significant advantage in operational stability compared to conventional scanning beds 2-1.

[0039] The transmission control module of this technology includes functions for moving to the scanning position, exiting to the initial position, emergency stop, and acceleration / deceleration adjustment. The control module also includes functions for adjusting fan speed, light intensity, light mode, heat dissipation power, and resetting the control module. These functions can be controlled via buttons or a user operating platform. The scanning device can be controlled via a handle or fixed to a control console.

[0040] Both the drive motor 4-2 and the lead screw 4-3 are fixed on the base frame, which is fixed on the base surface and serves as the fixed foundation for this device. The lead screw sleeve 4-4 is fitted onto the lead screw 4-3 and is fixedly connected to the support structure 3-1. In this embodiment, the lead screw sleeve 4-4 is fixedly connected to the bottom center of the support structure 3-1.

[0041] The base frame includes a base plate 4-5 for connecting the mobile device 4-1 and fixing it to the base surface. Specifically, the bottom of the base plate 4-5 is fixed to the base surface by feet. The feet have a height adjustment function, and the screws used for adjusting the height are hollow structures. Expansion screws can be installed in the hollow parts for fixing the device after it is placed in position. The feet are respectively placed on the left and right sides of the base plate, and the spacing between the feet should preferably not exceed the width of the base plate.

[0042] The bottom surface of the support structure 3-1 is wider than the base frame. Support auxiliary structures 4-6 are provided on both sides of the base plate 4-5. Throughout the movement of the support structure 3-1, the support auxiliary structures 4-6 and the support structure 3-1 are always connected by a line or a surface. In this embodiment, the support auxiliary structure 4-6 is a rectangular profile perpendicular to the base plate 4-5 and vertically upwards. Several base frame ribs 4-7 are provided between the support auxiliary structure 4-6 and the base plate 4-5, and the ribs 4-7 are all perpendicular to both the base plate 4-5 and the support auxiliary structure 4-6. The top of the support auxiliary structure 4-6 has a strip-shaped plane. Since the bottom surface of the support structure 3-1 is wider than the base frame, both sides of the bottom of the support structure 3-1 are supported by the top surface of the support auxiliary structure 4-6, distributing the force on the bottom of the support structure 3-1 and preventing the support structure 3-1 from tilting to one side due to the scanning bed 2-1 being suspended. To reduce the friction between the support structure 3-1 and the strip-shaped plane, rollers or smooth surfaces are provided on the support structure 3-1 at positions corresponding to the strip-shaped plane. One function of the auxiliary support structure 4-6 is to create a cavity between the base surface and the support structure 3-1 to accommodate the drive motor 4-2 and the lead screw device.

[0043] Since the scanning bed 2-1 is located on one side of the support structure 3-1, this results in a large force on that side of the support structure 3-1, causing it to tilt to that side. Although the auxiliary support structure 4-6 can prevent the support structure 3-1 from tilting, the pulling force of the moving device 4-1 on the support structure 3-1 will be concentrated on the lead screw sleeve 4-4. This concentrated force can easily lead to the breakage of the lead screw sleeve 4-4 or the lead screw 4-3. This technology provides sliding support structures 3-1 on the left and right sides of the linear drive module. The sliding support structure 3-1 includes a horizontally arranged slide rail 4-8 fixed at both ends to the base frame. A slider 4-9 is mounted on the slide rail 4-8, located below the support structure 3-1 and engaging with the slide rail 4-8. The slider 4-9 is fixedly connected to the support structure 3-1, ensuring that the bottom of the support structure 3-1 has fixed points on both sides except for the center. This distributes the force on the lead screw sleeve 4-4, evenly distributing most of the force from the lead screw 4-3 and lead screw sleeve 4-4 onto the sliding support structure 3-1. Since both the sliding support structure 3-1 and the sliding device are fixed to the base frame, they form a single integrated structure, meeting the stability requirements of this technology for bottom support. To better balance the forces between the support structure 3-1, the lead screw sleeve 4-4, and the slider 4-9, at least two sliders 4-9 are provided on the same sliding support structure 3-1. The distance between the sliders 4-9 is greater than 1 / N of the bottom of the accommodating space, where N is the number of sliders on one side. The sliders 4-9 connect the front and rear sides of the support structure 3-1, so that the front and rear points of the bottom of the support structure 3-1 are fixed, which is used to disperse the bottom fixing points of the support structure 3-1, thereby dispersing the internal stress on the support structure 3-1.

[0044] Both ends of the moving device 4-1 are equipped with limiting devices 4-10. The limiting device 4-10 includes a fixed pulley and an inclined surface on the support structure 3-1. A pressure sensor is provided on the inclined surface. When the support structure 3-1 reaches the position, the inclined surface will squeeze the fixed pulley, and the fixed pulley will squeeze the pressure sensor in the opposite direction. The movement limit of the support structure 3-1 is determined according to the signal change of the pressure sensor.

[0045] 5. Control System This technology uses the CAN serial bus communication protocol for communication between the host computer and the electronic equipment inside the support structure 3-1. The one-click data acquisition process of this technology includes: after the user completes the patient positioning, the user sets the acquisition parameters on the host computer (user interface); after the parameters are set, the user confirms that the positioning is correct, the host computer automatically moves the patient to the MRI acquisition area and automatically starts the MRI detection array to begin data acquisition; after the data acquisition is completed, the system prompts that the data acquisition is complete, and the user confirms and the patient is automatically removed; while the hardware automatically removes the patient, the host computer automatically generates an MRI acquisition report, and uploads the data to the MRI analysis workstation according to the network information configured by the user. If the user has not configured network information, no data is uploaded.

[0046] Furthermore, this technology involves users entering the scanning area during operation, therefore its security priority is higher than other control functions. In the bus arbitration control, an arbitration method is used to distribute the control logic among various components or devices connected to the bus. When a device makes a bus request, each arbitrator compares the arbitration number obtained from the arbitration bus with its own arbitration number. If the priority on the arbitration bus is higher, its bus request is not responded to, and its arbitration number is revoked. The arbitration number of the final winner is retained on the arbitration bus. The emergency stop priority is set higher than other controls, such as device entry / exit, acceleration / deceleration, wind speed adjustment, and lighting adjustment. This ensures the safety of prioritizing user exit in case of failure, forming the system's safety control mechanism. When the system receives an emergency stop operation from any location, it will respond to the operation first, stopping data acquisition, shutting down the detector array, sending an error log to the host computer, activating the device's red warning light, and playing a prompt sound on the user's operating platform. After the user receives and processes the signal, the alarm is cleared, the emergency stop state is restored, and after confirmation, the device state is restored, re-entering the data acquisition process.

[0047] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the systems, devices, apparatuses, modules or units described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0048] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such quantities can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0049] It should be understood that in this application, "at least one (item)" means one or more, and "more than" means two or more. "And / or" is used to describe the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: only A exists, only B exists, and both A and B exist simultaneously, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one (item) of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (item) of a, b, or c can represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or multiple.

[0050] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0051] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A supportless magnetoencephalography (MEG) detection system, characterized in that: It includes a separate magnetic shielding chamber and a scanning bed. The end of the scanning bed facing away from the magnetic shielding chamber is provided with a support structure for supporting the scanning bed to be horizontally suspended. The suspended side of the scanning bed corresponds to the inlet of the magnetic shielding chamber. The support structure is fixedly connected to a moving device fixed on the base surface. The moving device drives the scanning bed to move in and out of the magnetic shielding chamber through the support structure.

2. The unsupported magnetoencephalography (MEG) detection system according to claim 1, characterized in that: The longitudinal deformation of the scanning bed at its maximum length position does not exceed 30 mm.

3. The unsupported magnetoencephalography (MEG) detection system according to claim 1, characterized in that: A brain data acquisition device is provided at one end of the scanning bed connected to the magnetic detector. A cable routing compartment is provided inside the scanning bed, through which communication cables and wires pass for data and power transmission between the electronic equipment on the support side of the scanning bed and the brain data acquisition device.

4. The unsupported magnetoencephalography (MEG) detection system according to claim 1, characterized in that: The support structure is provided with a first connecting surface that is fixedly connected to the scanning bed, and the scanning bed is provided with a second connecting surface that fits against the first connecting surface. The connecting surface and the scanning bed are fixed together by a number of fastening bolts.

5. The unsupported magnetoencephalography (MEG) detection system according to claim 1, characterized in that: The supporting structure has a receiving space, and the receiving space contains at least one of the following: information acquisition equipment, system control equipment, data interaction equipment, and system power supply equipment.

6. The unsupported magnetoencephalography (MEG) detection system according to claim 6, characterized in that: The support structure includes an outer shell and a support frame. The support frame includes a base plate. At least two longitudinal supports are provided on both sides of the base plate. A transverse support is provided at the top of the support structure to connect all the longitudinal supports on the same side. A support cross plate fixedly connected to the scanning bed is provided between the transverse supports. Several cross beams are provided between the longitudinal supports on both sides.

7. The unsupported magnetoencephalography (MEG) detection system according to claim 1, characterized in that: The mobile device includes a linear drive module and a base frame. The linear drive module includes a drive motor, a lead screw, and a lead screw sleeve. The drive motor and the lead screw are both fixed on the base frame. The lead screw sleeve is fitted onto the lead screw and is fixedly connected to the support structure. The base frame includes a base plate for connecting the moving device to the base surface. The bottom surface of the support structure is wider than the base frame. Support auxiliary structures are provided on both sides of the base plate. During the entire process of the support structure moving, the support auxiliary structures and the support structure are in a line connection or surface connection.

8. The unsupported magnetoencephalography (MEG) detection system according to claim 7, characterized in that: The linear drive module is provided with a sliding support structure on one or both sides. The sliding support structure includes a slide rail that is fixed at both ends to the base frame and is horizontally arranged. A slider is provided on the slide rail and the slider is fixedly connected to the support structure.

9. The unsupported magnetoencephalography (MEG) detection system according to claim 8, characterized in that: At least two sliders are provided on the same sliding support structure, and the sliders connect the front and rear sides of the support structure.

10. The unsupported magnetoencephalography (MEG) detection system according to claim 7, characterized in that: Both ends of the moving device are equipped with limiting devices. The limiting device includes a fixed pulley and an inclined surface on the support structure. A pressure sensor is provided on the inclined surface. When the support structure reaches the position, the inclined surface will squeeze the fixed pulley, and the fixed pulley will squeeze the pressure sensor in the opposite direction. The movement limit of the support structure is determined according to the signal change of the pressure sensor.

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