Signal acquisition device and magnetic resonance imaging system

Abstract

The invention relates to a signal acquisition device and a magnetic resonance imaging system. The signal acquisition device is applied to the magnetic resonance imaging device and comprises a signal acquisition module, a signal transmission module and a signal acquisition module, the signal acquisition module is electrically connected with the signal transmission module, and the signal transmission module is wirelessly connected with the signal acquisition module; the signal acquisition module is used for acquiring a target physiological signal of an imaging object and transmitting the target physiological signal to the signal transmission module; the signal transmission module is used for performing signal conversion on the received target physiological signal, generating a first optical signal and transmitting the first optical signal to the signal acquisition module; the signal acquisition module is used for acquiring a target physiological signal according to the received first optical signal. According to the signal acquisition device, when the target physiological signal of the imaging object is acquired, a lead cable does not need to be laid, and the workload of a user can be reduced.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to a signal acquisition device and a magnetic resonance imaging system. Background Art

[0002] In the process of imaging an imaging object using a magnetic resonance imaging device, in order to improve the imaging quality, it is usually necessary to collect, monitor, and process the physiological signals of the imaging object during the imaging process.

[0003] In conventional technology, one or more electrodes are usually used to detect physiological signals, and the physiological signals detected by these electrodes are transmitted to a monitor via a lead cable. However, the connection of the lead cable is relatively complicated, which increases the workload of the user. Summary of the invention

[0004] Based on this, it is necessary to provide a signal acquisition device and a magnetic resonance imaging system that can reduce the workload of users in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a signal acquisition device, which is applied to a magnetic resonance imaging device, and the signal acquisition device comprises: a signal acquisition module, a signal transmission module and a signal acquisition module, wherein the signal acquisition module is electrically connected to the signal transmission module, and the signal transmission module is wirelessly connected to the signal acquisition module;

[0006] A signal acquisition module, used to acquire target physiological signals of the imaging object and transmit the target physiological signals to the signal transmission module;

[0007] A signal transmission module, used for performing signal conversion on the received target physiological signal, generating a first optical signal, and transmitting the first optical signal to the signal acquisition module;

[0008] The signal acquisition module is used to acquire a target physiological signal according to the received first light signal.

[0009] In one embodiment, the signal acquisition module includes: a plurality of electrode contact points and a first signal processing component, one end of each electrode contact point is connected to an external electrode, and the other end of each electrode contact point is connected to the first signal processing component;

[0010] The first signal processing component is used to process the initial physiological signals collected by multiple electrode contact points, generate target physiological signals, and transmit the target physiological signals to the signal transmission module.

[0011] In one of the embodiments, the first signal processing component includes: a signal selection unit and an analog-to-digital conversion unit, the input end of the signal selection unit is connected to the other end of each electrode contact point, and the output end of the signal selection unit is connected to the analog-to-digital conversion unit;

[0012] a signal selection unit, configured to select at least one electrode contact point from a plurality of electrode contact points to obtain an initial physiological signal, and transmit the initial physiological signal to the analog-to-digital conversion unit;

[0013] The analog-to-digital conversion unit is used to perform analog-to-digital conversion on the received initial physiological signal to obtain a target physiological signal.

[0014] In one embodiment, the first signal processing component further includes: a filter and an amplifier, the input end of the filter is connected to the signal selection unit, the output end of the filter is connected to the input end of the amplifier, and the output end of the amplifier is connected to the analog-to-digital conversion unit.

[0015] In one embodiment, the signal transmission module includes: a second signal processing component and a first light emitting component, the second signal processing component is connected to the signal acquisition module and the first light emitting component;

[0016] A second signal processing component, used for performing modulation processing on the target physiological signal;

[0017] The first light-emitting component is used to generate a first light signal according to the modulated target physiological signal, and transmit the first light signal to the signal acquisition module.

[0018] In one embodiment, the signal acquisition module includes: a photoelectric conversion component and a display, wherein the photoelectric conversion component is connected to the display;

[0019] A photoelectric conversion component, used for performing photoelectric conversion processing on the received first optical signal to obtain a target physiological signal, and sending the target physiological signal to a display;

[0020] The display is used to display the target physiological signals.

[0021] In one of the embodiments, the signal acquisition module further includes: a signal receiving component and a second light emitting component, the signal receiving component being connected to the second light emitting component;

[0022] The signal receiving component is used to receive the indication signal input by the user and modulate the indication signal; the indication signal is used to adjust the parameters of the signal acquisition module;

[0023] The second light-emitting component is used to generate a second light signal according to the modulated indication signal, and transmit the second light signal to the signal transmission module.

[0024] In one embodiment, the signal transmission module is further used to demodulate the received second optical signal to obtain an indication signal, and transmit the indication signal to the signal acquisition module.

[0025] In one embodiment, the signal acquisition device further includes a charging module, and the charging module is connected to the signal acquisition module and the signal transmission module.

[0026] In one embodiment, the charging module includes an energy collection component, an energy processing component and a charging component, the energy collection component is connected to the energy processing component, and the energy processing component is connected to the charging component;

[0027] An energy harvesting component, used to harvest energy from the magnetic resonance imaging device and transmit the energy to an energy processing component;

[0028] An energy processing component, used to process the received energy and transmit the processed electric energy to the charging component;

[0029] The charging component is used to charge the signal acquisition module and the signal transmission module using electrical energy.

[0030] In one embodiment, the energy collection component includes a first coil and / or a second coil, the first coil is arranged on the signal collection module, and is used to collect the radio frequency field energy in the magnetic resonance imaging device; the second coil is arranged on the signal collection module, and is used to collect the gradient field energy in the magnetic resonance imaging device.

[0031] In one of the embodiments, the energy collection component further includes a support component, and the support component is disposed on the signal collection module;

[0032] The supporting assembly is used for supporting the second coil.

[0033] In one embodiment, the energy processing component includes a rectifier regulator, an input end of the rectifier regulator is connected to the energy collection component, and an output end of the rectifier regulator is connected to the charging component.

[0034] In one embodiment, the energy processing component further includes a ballast component, an input end of the ballast component is connected to the first coil, and an output end of the ballast component is connected to the rectifier regulator.

[0035] In a second aspect, an embodiment of the present application provides a magnetic resonance imaging system, which includes a magnetic resonance imaging device and a signal acquisition device as provided in the first aspect above.

[0036] The embodiment of the present application provides a signal acquisition device and a magnetic resonance imaging system, the signal acquisition device is applied to the magnetic resonance imaging device, the signal acquisition device includes a signal acquisition module, a signal transmission module, and a signal acquisition module, the signal acquisition module is electrically connected to the signal transmission module, and the signal transmission module is wirelessly connected to the signal acquisition module; the signal acquisition module is used to acquire the target physiological signal of the imaging object and transmit the target physiological signal to the signal transmission module; the signal transmission module is used to perform signal conversion on the received target physiological signal, generate a first optical signal, and transmit the first optical signal to the signal acquisition module; the signal acquisition module is used to acquire the target physiological signal according to the received first optical signal. In this embodiment, the target physiological signal of the imaging object is transmitted to the signal acquisition module by the signal transmission module through the first optical signal, so there is no need to set up a lead cable, and there is no need to lay, remove and manage the cable, etc., which can reduce the workload of the user. In addition, by transmitting the target physiological signal through the first optical signal, the efficiency of acquiring the target physiological signal can be improved, and the target physiological signal can be prevented from being interfered with, thereby improving the accuracy of the acquired target physiological signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a signal acquisition device in one embodiment;

[0038] Figure 2 is a structural schematic diagram of a signal acquisition module in an embodiment;

[0039] Figure 3 It is a structural schematic diagram of a signal acquisition module in another embodiment;

[0040] Figure 4 is a schematic diagram of the structure of a signal transmission module in one embodiment;

[0041] Figure 5 A schematic diagram of the structure of a signal acquisition module in an embodiment;

[0042] Figure 6 It is a structural schematic diagram of a signal acquisition module in another embodiment;

[0043] Figure 7 It is a structural schematic diagram of a signal acquisition device in another embodiment;

[0044] Figure 8 is a schematic structural diagram of a charging module in one embodiment;

[0045] Fig. 9 A schematic diagram of the structure of an energy harvesting component in one embodiment;

[0046] Fig.10 FIG. 4 is a schematic diagram of the structure of a magnetic resonance imaging system in one embodiment.

[0047] Description of reference numerals:

[0048] 10. Signal acquisition device; 20. Magnetic resonance imaging system; 21. Macropore; 100. Signal acquisition module; 110. Electrode contact point; 120. First signal processing component; 121. Signal selection unit; 122. Analog-to-digital conversion unit; 123. Filter; 124. Amplifier; 200. Signal transmission module; 210. Second signal processing component; 220. First light-emitting component; 230. Photoelectric converter; 240. Processor; 300. Signal acquisition module; 31 0. Photoelectric conversion component; 320. Display; 330. Signal receiving component; 340. Second light-emitting component; 400. Charging module; 410. Energy collection component; 411. First coil; 412. Second coil; 413. Support component; 401. First support rod; 402. Second support rod; 420. Energy processing component; 421. Rectifier stabilizer; 422. Ballast component; 430. Charging component; 431. Power buffer pool; 432. Battery management unit. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] The serial numbers assigned to the components in this article, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning.

[0051] First, before specifically introducing the technical solutions of the embodiments disclosed in the present application, the background technology or technical evolution context on which the embodiments of the present application are based is introduced. In the field of magnetic resonance imaging, magnetic resonance imaging is a technology that uses magnetic fields, magnetic field gradients and radio waves to generate a series of images of imaging objects. In the process of imaging an imaging object using a magnetic resonance imaging device, in order to improve the imaging quality, it is usually necessary to collect, detect and process the physiological signals of the imaging object under specific magnetic resonance conditions. In traditional technology, one or more electrodes are usually used to detect physiological signals, and the physiological signals detected by the electrodes are transmitted to a monitor through lead wires. However, in the process of imaging using a magnetic resonance imaging device, the lead wires are extremely easy to pick up magnetic resonance imaging noise. Magnetic resonance imaging noise may cause the signal-to-noise ratio of the collected physiological signals to deteriorate, as well as other effects. The deterioration of physiological signals may also reduce the accuracy of physiological gating triggering based on deteriorated physiological signals. Moreover, the lead wire with a long length may inadvertently act as a radio frequency antenna, and may pick up the radio frequency field energy generated by the magnetic resonance imaging device. The radio frequency field energy may cause radio frequency heating of the lead wire, thereby damaging the lead wire and even posing a safety threat to the imaging object connected to the lead wire. In addition, although the existing technology can shorten the length of the lead wire, the shortened lead wire still requires a wire harness. In order to avoid the electromagnetic compatibility problem in the signal transmission process caused by the lead wire, the lead wire is replaced by an optical fiber cable, that is, the optical fiber cable is used to communicate with a number of digital electrodes, and the local digital physiological signals are safely transmitted from the magnetic resonance working environment to the monitor through a non-metallic optical conductor, and the power supply required for the digital electrode and the signal for communication synchronization can all be transmitted and obtained through the optical fiber cable. However, the optical fiber cable is still a wired solution, which requires cable laying, cable removal, and cable management, which will increase the workload of the user. In addition, when using optical fiber cables, the energy conversion is an electrical-optical-electrical conversion path, which is inefficient, and the device performing photoelectric conversion is prone to light fading and photovoltaic aging, which affects signal transmission. In this regard, the present application provides a signal acquisition device.

[0052] The technical solution of the present application and how the technical solution of the present application solves the technical problem are described in detail below with specific embodiments.

[0053] See also Figure 1 The present application provides a signal acquisition device 10, which is applied to a magnetic resonance imaging device. That is, during the process of scanning an imaging object using a magnetic resonance imaging device, the signal acquisition device 10 provided by the present application can be used to acquire physiological signals of the imaging object.

[0054] The signal acquisition device 10 comprises: a signal acquisition module 100 , a signal transmission module 200 and a signal acquisition module 300 . The signal acquisition module 100 is electrically connected to the signal transmission module 200 , and the signal transmission module 200 is wirelessly connected to the signal acquisition module 300 .

[0055] The input end of the signal acquisition module 100 is used to connect to the imaging object, and the output end of the signal acquisition module 100 is connected to the input end of the signal transmission module 200. The communication connection between the signal acquisition module 100 and the signal transmission module 200 can be a wired communication connection or a wireless communication connection. The signal acquisition module 100 and the signal transmission module 200 are both arranged close to the imaging object, that is, when the magnetic resonance imaging device scans and images the imaging object, they can be arranged in the large hole of the magnetic resonance imaging device. The output end of the signal transmission module 200 is communicatively connected to the signal acquisition module 300 via an optical signal, and the signal acquisition module 300 can be arranged in a weak magnetic field area in the space where the magnetic resonance imaging device is located. Figure 1 As shown, the area formed by the dotted line is the area of ​​the optical signal emitted by the signal transmission module 200, and the signal acquisition module 300 is arranged within the range where the optical signal transmitted by the signal transmission module 200 is located.

[0056] The signal acquisition module 100 is used to acquire the target physiological signal of the imaging object and transmit the target physiological signal to the signal transmission module 200; the signal transmission module 200 is used to perform signal conversion on the received target physiological signal, generate a first light signal, and transmit the first light signal to the signal acquisition module 300; the signal acquisition module 300 is used to acquire the target physiological signal according to the received first light signal.

[0057] During the scanning and imaging process of the imaging object by the magnetic resonance imaging device, the target physiological signal of the imaging object can be collected by the signal acquisition module 100. The target physiological signal of the imaging object can be the electrocardiogram signal, respiratory signal, myocardial signal, blood oxygen concentration, etc. of the imaging object. After collecting the target physiological signal, the signal acquisition module 100 can transmit the target physiological signal to the signal transmission module 200. After receiving the target physiological signal, the signal transmission module 200 performs signal conversion on the target physiological signal to generate a first optical signal, that is, the first optical signal contains the target physiological signal. After generating the first optical signal, the signal transmission module 200 transmits the first optical signal to the signal acquisition module 300. That is, the signal transmission module 200 can transmit the target physiological signal through the first optical signal, and the signal acquisition module 300 can receive the first optical signal, and the target physiological signal can be obtained according to the received first optical signal. Specifically, the signal transmission module 200 modulates the target physiological signal so that the modulated optical carrier carries the target physiological signal, thereby generating the first optical signal. After receiving the first optical signal, the signal acquisition module 300 demodulates the first optical signal to acquire the target physiological signal carried in the first optical signal. The first optical signal may be visible light or invisible light, such as infrared. This embodiment does not limit the type of the first optical signal, as long as it can achieve its function.

[0058] In an optional embodiment, after acquiring the target physiological signal, the signal acquisition module 300 can send the target physiological signal to a magnetic resonance imaging device so that the magnetic resonance imaging device performs imaging based on the target physiological signal and the acquired magnetic resonance signal, thereby improving the image quality after imaging.

[0059] In an optional embodiment, the signal acquisition module 100, the signal transmission module 200 and the signal acquisition module 300 may all be connected to an external power supply, so that the external power supply supplies power to the signal acquisition module 100, the signal transmission module 200 and the signal acquisition module 300. Alternatively, the signal acquisition module 100 may be connected to an external power supply, and the signal acquisition module 100 may be powered by the external power supply, and the signal transmission module 200 may be connected to the signal acquisition module 100, so that the external power supply may transmit electric energy to the signal transmission module 200 through the signal acquisition module 100, and supply power to the signal transmission module 200.

[0060] This embodiment does not limit the arrangement positions and specific structures of the signal collection module 100 , the signal transmission module 200 and the signal acquisition module 300 , as long as their functions can be achieved.

[0061] The working principle of the signal acquisition device 10 provided in the embodiment of the present application is as follows:

[0062] During the process of scanning and imaging the imaging object by the magnetic resonance imaging device, the target physiological signal of the imaging object is collected by the signal acquisition module 100, and the target physiological signal is transmitted to the signal transmission module 200; after receiving the target physiological signal, the signal transmission module 200 converts the target physiological signal into a first light signal, and transmits the first light signal; the signal acquisition module 300 can receive the first light signal emitted by the signal transmission module 200, and obtain the target physiological signal of the imaging object according to the first light signal, so that the target physiological signal of the imaging object can be obtained during the scanning and imaging process.

[0063] The signal acquisition device 10 provided in the embodiment of the present application is applied to a magnetic resonance imaging device. The signal acquisition device 10 includes a signal acquisition module 100, a signal transmission module 200, and a signal acquisition module 300. The signal acquisition module 100 is electrically connected to the signal transmission module 200, and the signal transmission module 200 is wirelessly connected to the signal acquisition module 300. The signal acquisition module 100 is used to acquire the target physiological signal of the imaging object and transmit the target physiological signal to the signal transmission module 200. The signal transmission module 200 is used to perform signal conversion on the received target physiological signal, generate a first optical signal, and transmit the first optical signal to the signal acquisition module 300. The signal acquisition module 300 is used to acquire the target physiological signal according to the received first optical signal. In this embodiment, the target physiological signal of the imaging object is transmitted from the signal transmission module 200 to the signal acquisition module 300 through the first optical signal, so there is no need to set up a lead cable, and there is no need to lay, remove and manage the cable, etc., which can reduce the workload of the user. Furthermore, by transmitting the target physiological signal through the first optical signal, the efficiency of acquiring the target physiological signal can be improved, and interference with the target physiological signal can be avoided, thereby improving the accuracy of the acquired target physiological signal.

[0064] In one embodiment, Figure 2 As shown, the signal acquisition module 100 includes: a plurality of electrode contact points 110 and a first signal processing component 120, one end of each electrode contact point 110 is connected to an external electrode, and the other end of each electrode contact point 110 is connected to the first signal processing component 120. The first signal processing component 120 is used to perform signal processing on the initial physiological signals collected by the plurality of electrode contact points, generate a target physiological signal, and transmit the target physiological signal to the signal transmission module 200.

[0065] When the imaging object is scanned and imaged using a magnetic resonance imaging device, when the physiological signals of the imaging object need to be monitored, a plurality of electrodes, i.e., external electrodes, are attached to the imaging object. One end of each electrode contact point 110 in the signal acquisition module 100 is used to be connected to the electrodes attached to the imaging object respectively. Each electrode contact point 110 is detachably buckled or clamped with the corresponding electrode. The other end of each electrode contact point 110 is connected to the input end of the first signal processing component 120, and the output end of the first signal processing component 120 is connected to the signal transmission module 200. The first signal processing component 120 can collect the initial physiological signal of the imaging object through the plurality of electrode contact points 110 connected to the external electrodes, and the initial physiological signal is an analog signal. After receiving the initial physiological signal, the first signal processing component 120 performs analog-to-digital conversion on the initial physiological signal to generate a target physiological signal, which is a digital signal. After obtaining the target physiological signal, the first signal processing component 120 transmits the target physiological signal to the signal transmission module 200.

[0066] In an optional embodiment, the signal acquisition module 100 may also include a first shell, and a plurality of electrode contact points 110 are arranged on one side of the outside of the first shell. The first shell has a first accommodating cavity, and the first signal processing component 120 is arranged in the first accommodating cavity. Specifically, the first signal processing component 120 may be an analog-to-digital converter. The shape of the first shell may be a cubic structure, a rectangular parallelepiped structure, or a three-dimensional structure of other irregular shapes. The material of the first shell may be plastic, wood, or other non-conductive materials. This embodiment does not limit the structure and material of the first shell, as long as its function can be achieved.

[0067] In this embodiment, the signal acquisition module 100 includes a plurality of electrode contact points 110 and a first signal processing component 120, one end of each electrode contact point 110 is connected to an external electrode, and the other end of each electrode contact point 110 is connected to the first signal processing component 120; the first signal processing component 120 is used to perform signal processing on the initial physiological signals collected by the plurality of electrode contact points 110, generate target physiological signals, and transmit the target physiological signals to the signal transmission module 200. Such a signal acquisition module 100 has a simple structure, is easy to obtain, and has a low cost.

[0068] In an optional embodiment, the signal acquisition module 100 further includes electrodes respectively connected to the plurality of electrode contact points 110. When the imaging object is scanned and imaged using the magnetic resonance imaging device, and the physiological signals of the imaging object need to be monitored, the electrodes in the signal acquisition module 100 are directly applied to the imaging object, and the initial physiological signals collected by the plurality of electrode contact points 110 are processed by the first signal processing component 120 to generate target physiological signals, and the target physiological signals are transmitted to the signal transmission module 200.

[0069] Please continue to see Figure 2 In one embodiment, the first signal processing component 120 includes a signal selection unit 121 and an analog-to-digital conversion unit 122. The input end of the signal selection unit 121 is connected to the other end of each electrode contact point 110, and the output end of the signal selection unit 121 is connected to the analog-to-digital conversion unit 122.

[0070] The input end of the signal selection unit 121 is connected to the other end of each electrode contact point 110 as the input end of the first signal processing component 120, the output end of the signal selection unit 121 is connected to the input end of the analog-to-digital conversion unit 122, and the output end of the analog-to-digital conversion unit 122 is connected to the signal transmission module 200 as the output end of the first signal processing component 120.

[0071] The signal selection unit 121 is used to select at least one electrode contact point from multiple electrode contact points 110 to obtain an initial physiological signal, and transmit the initial physiological signal to the analog-to-digital conversion unit 122; the analog-to-digital conversion unit 122 is used to perform analog-to-digital conversion on the received initial physiological signal to obtain a target physiological signal.

[0072] The first signal processing component 120 can obtain the initial physiological signal transmitted by the external electrode connected to each electrode contact point 110 through multiple electrode contact points 110. The signal selection unit 121 in the first signal processing component 120 can select one electrode contact point 110 from the multiple electrode contact points 110 to obtain the initial physiological signal corresponding to the electrode contact point 110, or can select multiple electrode contact points 110 from the multiple electrode contact points 110 to obtain the initial physiological signal corresponding to the selected electrode contact point 110. This embodiment does not limit the type and structure of the signal selection unit 121, as long as its function can be achieved.

[0073] In an optional embodiment, if the initial physiological signal is a myocardial signal or a respiratory signal, the signal selection unit 121 can select two electrode contact points from multiple electrode contact points, obtain electrode signals of the two electrode contact points, and form a differential electrode pair to obtain the initial physiological signal.

[0074] In an optional embodiment, the signal selection unit 121 may be a chip on which a pre-edited software program is burned. The signal selection unit 121 may also be a selection circuit, the input end of which is connected to each electrode contact point 110, and the output end of which is connected to the analog-to-digital conversion unit 122 through a selection switch, and the electrode signal of at least one electrode contact point 110 may be selected from multiple electrode contact points 110 through the selection switch to obtain the initial physiological signal.

[0075] After acquiring the initial physiological signal, the first signal processing component 120 transmits the initial physiological signal to the analog-to-digital conversion unit 122. The analog-to-digital conversion unit 122 performs analog-to-digital conversion on the received initial physiological signal to obtain the target physiological signal. Specifically, the analog-to-digital conversion unit 122 may be an analog-to-digital converter. The analog-to-digital conversion unit 122 may include multiple analog-to-digital converters, and the number of analog-to-digital converters may be the same as the number of electrode contact points 110.

[0076] In this embodiment, the first signal processing component 120 includes a signal selection unit 121 and an analog-to-digital conversion unit 122, the input end of the signal selection unit 121 is connected to the other end of each electrode contact point 110, and the output end of the signal selection unit 121 is connected to the analog-to-digital conversion unit 122. The target physiological signal is obtained by the signal selection unit 121 and the analog-to-digital conversion unit 122 in the first signal processing component 120, and the structure of such a first signal processing component 120 is simple and easy to obtain.

[0077] In one embodiment, Figure 3 As shown, the first signal processing component 120 also includes a filter 123 and an amplifier 124, the input end of the filter 123 is connected to the signal selection unit 121, the output end of the filter 123 is connected to the input end of the amplifier 124, and the output end of the amplifier 124 is connected to the analog-to-digital conversion unit 122. There can be multiple filters 123 included in the first signal processing component 120, and similarly, there can be multiple amplifiers 124. After the first signal processing component 120 receives electrode signals from multiple electrode contact points 110, each electrode signal can correspond to a filter 123, and one filter 123 corresponds to an amplifier 124, and the electrode signal is filtered and amplified by the corresponding filter 123 and amplifier 124. This embodiment does not limit the number of filters 123 and amplifiers 124 included in the first signal processing component 120, as long as their functions can be achieved.

[0078] After the signal selection unit 121 receives the initial physiological signal, before transmitting the initial physiological signal to the analog-to-digital conversion unit 122, the initial physiological signal can be filtered through the filter 123 to obtain a filtered signal, and the filtered signal can be transmitted to the amplifier 124; the filtered signal can be amplified by the amplifier 124, and the processed signal can be transmitted to the analog-to-digital conversion unit 122.

[0079] In this embodiment, the signal selection unit 121 filters and amplifies the initial physiological signal before transmitting it to the analog-to-digital conversion unit 122. This can improve the accuracy of the signal transmitted to the analog-to-digital conversion unit 122, thereby improving the accuracy of the target physiological signal finally obtained.

[0080] In one embodiment, the signal acquisition module 100 further includes a clock circuit, through which a synchronization signal can be provided for the signal selection unit 121 and the analog-to-digital conversion unit 122 in the signal acquisition module 100. In addition, the synchronization signal provided by the clock circuit can be transmitted to the signal transmission module 200 to provide the synchronization signal for the signal transmission module 200. In the case where the signal acquisition module 100 acquires multiple physiological signals, the signal transmission module 200 can process the received multiple physiological signals in sequence based on the synchronization signal provided by the clock circuit, or process the received multiple physiological signals simultaneously.

[0081] In one embodiment, Figure 4 As shown, the signal transmission module 200 includes a second signal processing component 210 and a first light-emitting component 220, and the second signal processing component 210 is connected to the signal acquisition module 100 and the first light-emitting component 220. The input end of the second signal processing component 210 is connected to the signal acquisition module 100, and the output end of the second signal processing component 210 is connected to the first light-emitting component 220.

[0082] The second signal processing component 210 is used to modulate the target physiological signal; the first light-emitting component 220 is used to generate a first light signal according to the modulated target physiological signal, and transmit the first light signal to the signal acquisition module 300.

[0083] The second signal processing component 210 can receive the target physiological signal transmitted by the signal acquisition module 100, and the second signal processing component 210 modulates the received target physiological signal so that the modulated optical carrier carries the target physiological signal; the first light-emitting component 220 can generate a first optical signal according to the modulated target physiological signal, and transmit the first optical signal so that the signal acquisition module 300 receives the first optical signal. This embodiment does not limit the types of the second signal processing component 210 and the first light-emitting component 220, as long as their functions can be realized.

[0084] In an optional embodiment, the second signal processing component 210 may be a modulator, and the first light emitting component 220 may be a light emitting diode.

[0085] In this embodiment, the signal transmission module 200 includes a second signal processing component 210 and a first light-emitting component 220. The second signal processing component 210 is connected to the signal acquisition module 100 and the first light-emitting component 220. Such a signal transmission module 200 has a simple structure, is easy to obtain, and has a low cost.

[0086] In one embodiment, Figure 5 As shown, the signal acquisition module 300 includes a photoelectric conversion component 310 and a display 320, and the photoelectric conversion component 310 is connected to the display 320. The photoelectric conversion component 310 is used to perform photoelectric conversion processing on the received first light signal to obtain a target physiological signal, and send the target physiological signal to the display 320; the display 320 is used to display the target physiological signal.

[0087] The photoelectric conversion component 310 may be a photovoltaic cell array, and the display screen 320 may be a liquid crystal display screen or a light emitting diode display screen. The display screen 320 may be a display screen carried by the terminal. This embodiment does not limit the types of the photoelectric conversion component 310 and the display screen 320, as long as they can achieve their functions.

[0088] The photoelectric conversion component 310 can receive the first optical signal emitted by the signal transmission module 200 and convert the first optical signal into an electrical signal, namely, a target physiological signal. The photoelectric conversion component 310 converts the obtained target physiological signal into a display screen 320, which can display the target physiological signal.

[0089] In an optional embodiment, if the target physiological signal is an electrocardiogram signal, an electrocardiogram waveform may be displayed on the display screen 320 .

[0090] In this embodiment, the signal acquisition module 300 includes a photoelectric conversion component 310 and a display screen 320, and the photoelectric conversion component 310 and the display screen 320 are connected; the photoelectric conversion component 310 is used to perform photoelectric conversion processing on the received first light signal to obtain a target physiological signal, and transmit the target physiological signal to the display screen 320; the display screen 320 is used to display the target physiological signal. In this way, during the scanning and imaging process of the imaging object, the target physiological signal of the imaging object can be displayed on the display screen 320 in real time, so that the user can obtain the target physiological signal of the imaging object in real time, thereby improving the practicality of the signal acquisition device 10.

[0091] In one embodiment, Figure 6As shown, the signal acquisition module 300 further includes a signal receiving component 330 and a second light-emitting component 340 , and the signal receiving component 330 is connected to the second light-emitting component 340 .

[0092] The signal receiving component 330 is used to receive the indication signal input by the user and modulate the indication signal; the indication signal is used to adjust the parameters of the signal acquisition module; the second light-emitting component 340 is used to generate a second light signal according to the modulated indication signal and transmit the second light signal to the signal transmission module 200.

[0093] The signal receiving component 330 may be a terminal, through which the user inputs the indication signal. Specifically, the user may input the indication signal through a keyboard external to the terminal. The indication signal is used to adjust the parameters of the signal acquisition module 100. Specifically, the indication signal may be used to adjust the parameters of the signal selection unit 121 in the signal acquisition module 100 to change the selection of the plurality of electrode contacts 110. The indication signal may be used to adjust the filtering parameters of the filter 123. The indication signal may also be used to adjust the amplification parameters of the amplifier 124, etc. The description of the second light-emitting component 340 may refer to the specific description of the first light-emitting component 220 in the above embodiment, which will not be repeated here.

[0094] After receiving the indication signal input by the user, the signal receiving component 330 modulates the indication signal so that the modulated optical carrier carries the indication signal; the second light emitting component 340 can generate a second optical signal according to the modulated indication signal, and transmit the second optical signal so that the signal transmission module 200 receives the second optical signal. This embodiment does not limit the structure of the signal receiving component 330, as long as its function can be achieved.

[0095] In this embodiment, the signal acquisition module 300 further includes a signal receiving component 330 and a second light emitting component 340, and the signal receiving component 330 and the second light emitting component 340 are connected; the signal receiving component 330 is used to receive the indication signal input by the user and modulate the indication signal; the second light emitting component 340 is used to generate a second light signal according to the modulated indication signal and transmit the second light signal to the signal transmission module 200. The signal acquisition module 300 can not only receive the first light signal containing the target physiological signal of the imaging object emitted by the signal transmission module 200, but also emit the second light signal containing the indication signal input by the user to the signal transmission module 200. Such a signal acquisition module 300 has higher practicality, thereby improving the practicality of the signal acquisition device 10.

[0096] In one embodiment, the signal transmission module 200 is further configured to demodulate the received second optical signal to obtain an indication signal, and transmit the indication signal to the signal acquisition module 100 .

[0097] After the second light emitting component 340 of the signal acquisition module 300 emits the second light signal containing the indication signal, the signal transmission module 200 can also be used to receive the second light signal, and after receiving the second light signal, demodulate the second light signal to obtain the indication signal contained in the second light signal. After receiving the indication signal, the signal transmission module 200 transmits it to the signal acquisition module 100, so that the signal acquisition module 100 adjusts its related parameters based on the indication signal.

[0098] In an optional embodiment, if Figure 4 As shown, the signal transmission module 200 may include a photoelectric converter 230 and a processor 240. The photoelectric converter 230 may receive a second optical signal emitted by the signal acquisition module 300. The processor 240 may demodulate the second optical signal to obtain an indication signal, and transmit the indication signal to the signal acquisition module 100.

[0099] In this embodiment, the signal transmission module 200 is also used to demodulate the received second optical signal to obtain an indication signal, and transmit the indication signal to the signal acquisition module 100. The signal transmission module 200 can not only transmit the target physiological signal of the imaging object acquired by the signal acquisition module 100 to the signal acquisition module 300, but also transmit the indication signal acquired by the signal acquisition module 300 to the signal acquisition module 100. Such a signal transmission module 200 has higher practicality, thereby improving the practicality of the signal acquisition device 10.

[0100] In one embodiment, Figure 7 As shown, the signal acquisition device 10 further includes a charging module 400 , and the charging module 400 is connected to the signal acquisition module 100 and the signal transmission module 200 .

[0101] The charging module 400 can be used to supply power to the signal acquisition module 100 and the signal transmission module 200. The charging module 400 can be a rechargeable battery. The present embodiment does not limit the specific structure of the charging module 400, as long as its function can be achieved.

[0102] In this embodiment, the charging module 400 in the signal acquisition device 10 directly supplies power to the signal acquisition module 100 and the signal transmission module 200 , thereby improving the practicality of the signal acquisition device 10 .

[0103] In one embodiment, Figure 8As shown, the charging module 400 includes an energy collection component 410, an energy processing component 420 and a charging component 430. The energy collection component 410 is connected to the energy processing component 420, and the energy processing component 420 is connected to the charging component 430. The energy collection component 410 is connected to the input end of the energy processing component 420, the output end of the energy processing component 420 is connected to the input end of the charging component 430, and the output end of the charging component 430 is connected to the charging end of the signal collection module 100 and the charging end of the signal transmission module 200.

[0104] The energy collection component 410 is used to collect energy from the magnetic resonance imaging device and transmit the energy to the energy processing component 420; the energy processing component 420 is used to process the received energy and transmit the processed electrical energy to the charging component 430; the charging component 430 is used to use electrical energy to charge the signal collection module 100 and the signal transmission module 200.

[0105] When the magnetic resonance imaging device is used to scan and image the imaging object, energy is generated, and the energy includes the radio frequency field energy during the transmission of the magnetic resonance radio frequency field and the gradient field energy during the gradient field change. The energy collection component 410 can be used to collect the energy generated by the magnetic resonance imaging device, and can transmit the collected energy to the energy processing component 420. This embodiment does not limit the specific structure of the energy collection component 410, as long as it can achieve its function.

[0106] After receiving the energy transmitted by the energy collection component 410, the energy processing component 420 processes the energy to convert the energy into electric energy that can power the signal collection module 100 and the signal transmission module 200. After obtaining the processed electric energy, the energy processing component 420 transmits the processed electric energy to the charging component 430. This embodiment does not limit the specific structure of the energy processing component 420, as long as its function can be achieved.

[0107] After receiving the processed electric energy transmitted by the energy processing component 420, the charging component 430 stores the electric energy and uses the stored electric energy to charge the signal acquisition module 100 and the signal transmission module 200. This embodiment does not limit the specific structure of the charging component 430 as long as its function can be achieved.

[0108] Please continue to see Figure 8 In an optional embodiment, the charging component 430 may include an electric energy buffer cell 431 and a battery management unit 432, the input end of the electric energy buffer cell 431 is connected to the energy processing component 420, the output end of the electric energy buffer cell 431 is connected to the input end of the battery management unit 432, and the output end of the battery management unit 432 is connected to the signal acquisition module 100 and the signal transmission module 200.

[0109] The power buffer pool 431 can store the processed power received from the energy processing component 420. The power buffer pool 431 can be a capacitor, multiple capacitors, or an inductor. This embodiment does not limit the type of the power buffer pool 431, as long as it can achieve its function.

[0110] The battery management unit 432 can adjust the electric energy stored in the electric energy buffer pool 431, and use the adjusted electric energy to power the signal acquisition module 100 and the signal transmission module 200. Specifically, the battery management unit 432 can adjust the voltage or current of the electric energy. This embodiment does not limit the specific structure of the battery management unit 432, as long as it can achieve its function.

[0111] The battery management unit 432 may correspond to the power buffer pool 431. When the power buffer pool 431 is a small-capacity capacitor, the battery management unit 432 may be a battery manager. When the power buffer pool 431 is a large-capacity capacitor, the battery management unit 432 may be a supercapacitor manager.

[0112] In this embodiment, the charging module 400 includes an energy collection component 410, an energy processing component 420 and a charging component 430. The energy collection component 410 is connected to the energy processing component 420, and the energy processing component 420 is connected to the charging component 430. The energy collection component 410 is used to collect energy from the magnetic resonance imaging device and transmit the energy to the energy processing component 420; the energy processing component 420 is used to process the received energy and transmit the processed electrical energy to the charging component 430. The charging module 400 can power the signal collection device 100 and the signal transmission device 200 by collecting energy from the magnetic resonance imaging device, so that the charging module 400 can "turn harm into benefit" and realize wireless energy supply, which can improve the practicality and reliability of the signal acquisition device 10.

[0113] Please continue to see Figure 8 In one embodiment, the energy harvesting component 410 includes a first coil 411 and / or a second coil 412. The energy harvesting component 410 may include a first coil 411, may include a second coil 412, or may include a first coil 411 and a second coil 412.

[0114] The first coil 411 is disposed on the signal acquisition module 100 and is used to collect radio frequency field energy in the magnetic resonance imaging device. The first coil 411 is disposed on the signal acquisition module 100 and has a first angle with the central axis of the large bore of the magnetic resonance imaging device, and the first angle may be other angle values ​​than 90 degrees.

[0115] The second coil 412 is disposed on the signal acquisition module 100 and is used to collect the gradient field energy in the magnetic resonance imaging device. The second coil 412 is disposed on the signal acquisition module 100 and has a second angle with the central axis of the large bore of the magnetic resonance imaging device, and the second angle can be other angle values ​​other than 180 degrees.

[0116] In this embodiment, the radio frequency field energy and / or gradient field energy of the magnetic resonance imaging device is collected by the first coil 411 and / or the second coil 412 arranged on the signal acquisition module 100. In this way, the first coil 411 and the second coil 412 for collecting the energy of the magnetic resonance imaging device are easy to obtain and have low cost, which can improve the practicality of the signal acquisition device 10.

[0117] In one embodiment, Fig. 9 As shown, the energy collection component 410 further includes a support component 413 , which is disposed on the signal collection module 100 ; the support component 413 is used to support the second coil 412 .

[0118] The support component 413 is arranged on the signal acquisition module 100, and there is an angle between the support component 413 and the signal acquisition module 100. The angle between the support component 413 and the signal acquisition module 100 is adjustable. The second coil 412 is arranged on the support component 413. The material of the support component 413 can be wood, plastic, or other non-conductive materials. This embodiment does not limit the structure and material of the support component 413, as long as it can achieve its function.

[0119] In an optional embodiment, if Fig. 9 As shown, the support assembly 413 includes a first support rod 401 and a second support rod 402, one end of the first support rod 401 is flexibly and detachably connected to the signal acquisition module 100, one end of the second support rod 402 is flexibly and detachably connected to the signal acquisition module 100, and the other end of the first support rod 401 is connected to the other end of the second support rod 402. The first support rod 401, the second support rod 402, and the signal acquisition module 100 can form a triangular plane, and the second coil 412 is laid on the triangular plane.

[0120] In an optional embodiment, if Fig. 9 As shown, the signal transmission module 200 can be disposed on a platform after the other end of the first support rod 401 and the other end of the second support rod 402 are connected.

[0121] In this embodiment, the energy collection component 410 further includes a support component 413, which is disposed on the signal collection module 100 and is used to support the second coil 412. In this way, the support component 413 can be used to lay the second coil 412, thereby improving the practicality of the signal acquisition device 10.

[0122] Please continue to see Figure 8 In one embodiment, the energy processing component 420 includes a rectifier regulator 421 , an input end of the rectifier regulator 421 is connected to the energy collection component 410 , and an output end of the rectifier regulator 421 is connected to the charging component 430 .

[0123] After receiving the energy transmitted by the energy collection component 410, the rectifier regulator 421 can convert the AC power into DC power and stabilize the DC power, even if the voltage of the DC power remains almost unchanged. The rectifier regulator 421 can transmit the rectified and stabilized power to the charging component 430.

[0124] In this embodiment, the energy processing component 420 includes a rectifier regulator 421, and the rectifier regulator 421 processes the electric energy transmitted to the charging component 430, thereby improving the practicality and safety of the charging module 400.

[0125] Please continue to see Figure 8 In one embodiment, the energy processing component 420 further includes a ballast component 422 , an input end of the ballast component 422 is connected to the first coil 411 , and an output end of the ballast component 422 is connected to the rectifier regulator 421 .

[0126] When the energy collection component 410 includes the first coil 411, before the RF field energy collected by the first coil 411 is transmitted to the rectifier regulator 421, the ballast component 422 is used to process the RF field energy, that is, to reduce the current of the RF field energy and increase the voltage. Specifically, the ballast component 422 can be a resistor.

[0127] In an optional embodiment, when the energy collection component 410 includes the second coil 412 , the gradient field energy collected by the second coil 412 can be directly transmitted to the rectifier regulator 421 .

[0128] In this embodiment, the energy processing component 420 also includes a ballast component 422. Before the energy collected by the first coil 411 is transmitted to the rectifier regulator 421, the ballast component 422 is first used to process the energy collected by the first coil 411, thereby ensuring that the subsequent charging component 430 can normally and safely power the signal acquisition module 100 and the signal transmission module 200, thereby improving the practicality of the charging module 400.

[0129] See also Fig.10 An embodiment of the present application provides a magnetic resonance imaging system 20, which includes a magnetic resonance imaging device and a signal acquisition device 10 as provided in the above embodiment. Fig.10 The invention comprises a large hole 21 in a magnetic resonance imaging device, and a signal acquisition module 100 and a signal transmission module 200 in a signal acquisition device 10 . Fig.10 The arrow passing through the large hole 21 indicates the direction of the first optical signal transmitted by the signal transmission module 200 .

[0130] The magnetic resonance imaging system 20 provided in this embodiment includes the signal acquisition device 10, and the magnetic resonance imaging system 20 has all the beneficial effects of the signal acquisition device 10, which will not be described in detail here.

[0131] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0132] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A signal acquisition device, characterized in that: Applied to a magnetic resonance imaging device, the signal acquisition device comprises: a signal acquisition module, a signal transmission module and a signal acquisition module, the signal acquisition module is electrically connected to the signal transmission module, and the signal transmission module is wirelessly connected to the signal acquisition module; The signal acquisition module is used to acquire target physiological signals of the imaging object and transmit the target physiological signals to the signal transmission module; The signal transmission module is used to perform signal conversion on the received target physiological signal to generate a first optical signal, and transmit the first optical signal to the signal acquisition module; The signal acquisition module is used to acquire the target physiological signal according to the received first light signal.

2. The signal acquisition device according to claim 1, characterized in that: The signal acquisition module includes: a plurality of electrode contact points and a first signal processing component, one end of each of the electrode contact points is connected to an external electrode, and the other end of each of the electrode contact points is connected to the first signal processing component; The first signal processing component is used to perform signal processing on the initial physiological signals collected by the plurality of electrode contact points to generate the target physiological signal, and transmit the target physiological signal to the signal transmission module.

3. The signal acquisition device according to claim 2, characterized in that: The first signal processing component comprises: a signal selection unit and an analog-to-digital conversion unit, wherein the input end of the signal selection unit is connected to the other end of each of the electrode contact points, and the output end of the signal selection unit is connected to the analog-to-digital conversion unit; The signal selection unit is used to select at least one electrode contact point from the plurality of electrode contact points to obtain the initial physiological signal, and transmit the initial physiological signal to the analog-to-digital conversion unit; The analog-to-digital conversion unit is used to perform analog-to-digital conversion on the received initial physiological signal to obtain the target physiological signal.

4. The signal acquisition device according to claim 3, characterized in that: The first signal processing component further includes: a filter and an amplifier, wherein the input end of the filter is connected to the signal selection unit, the output end of the filter is connected to the input end of the amplifier, and the output end of the amplifier is connected to the analog-to-digital conversion unit.

5. The signal acquisition device according to any one of claims 1 to 4, characterized in that: The signal transmission module comprises: a second signal processing component and a first light-emitting component, wherein the second signal processing component is connected to the signal acquisition module and the first light-emitting component; The second signal processing component is used to perform modulation processing on the target physiological signal; The first light-emitting component is used to generate a first light signal according to the modulated target physiological signal, and transmit the first light signal to the signal acquisition module.

6. The signal acquisition device according to any one of claims 1 to 4, characterized in that: The signal acquisition module includes: a photoelectric conversion component and a display, wherein the photoelectric conversion component is connected to the display; The photoelectric conversion component is used to perform photoelectric conversion processing on the received first light signal to obtain the target physiological signal, and send the target physiological signal to the display; The display is used to display the target physiological signal.

7. The signal acquisition device according to claim 6, characterized in that: The signal acquisition module further includes: a signal receiving component and a second light emitting component, wherein the signal receiving component is connected to the second light emitting component; The signal receiving component is used to receive the indication signal input by the user and modulate the indication signal; the indication signal is used to adjust the parameters of the signal acquisition module; The second light-emitting component is used to generate a second light signal according to the modulated indication signal, and transmit the second light signal to the signal transmission module.

8. The signal acquisition device according to claim 7, characterized in that: The signal transmission module is further used to demodulate the received second optical signal to obtain the indication signal, and transmit the indication signal to the signal acquisition module.

9. The signal acquisition device according to any one of claims 1 to 4, characterized in that: The signal acquisition device further comprises a charging module, and the charging module is connected to the signal acquisition module and the signal transmission module.

10. The signal acquisition device according to claim 9, characterized in that: The charging module includes an energy collection component, an energy processing component and a charging component, the energy collection component is connected to the energy processing component, and the energy processing component is connected to the charging component; The energy collection component is used to collect energy from the magnetic resonance imaging device and transmit the energy to the energy processing component; The energy processing component is used to process the received energy and transmit the processed electric energy to the charging component; The charging component is used to charge the signal acquisition module and the signal transmission module using electrical energy.

11. The signal acquisition device according to claim 10, characterized in that: The energy collection component includes a first coil and / or a second coil, the first coil is arranged on the signal collection module, and is used to collect the radio frequency field energy in the magnetic resonance imaging device; the second coil is arranged on the signal collection module, and is used to collect the gradient field energy in the magnetic resonance imaging device.

12. The signal acquisition device according to claim 11, characterized in that: The energy collection component further includes a support component, and the support component is arranged on the signal collection module; The supporting assembly is used to support the second coil.

13. The signal acquisition device according to claim 11, characterized in that: The energy processing component includes a rectifier regulator, an input end of the rectifier regulator is connected to the energy collection component, and an output end of the rectifier regulator is connected to the charging component.

14. The signal acquisition device according to claim 13, characterized in that: The energy processing component further includes a ballast component, an input end of the ballast component is connected to the first coil, and an output end of the ballast component is connected to the rectifier regulator.

15. A magnetic resonance imaging system, characterized in that: The magnetic resonance imaging system comprises a magnetic resonance imaging device and a signal acquisition device according to any one of claims 1-14.

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