Magnetic resonance imaging transceiver and method, and magnetic resonance imaging system

Abstract

The present invention proposes a magnetic resonance imaging transceiver and method, and a magnetic resonance imaging system, wherein the magnetic resonance imaging transceiver includes a transmitting module and a receiving module, the transmitting module is used to transmit radio frequency signals and / or local oscillator signals, the receiving module includes a receiving coil, a processing circuit and a receiver, the processing circuit receives magnetic resonance signals and / or local oscillator signals through the receiving coil, and performs signal processing to obtain a combined signal, the combined signal is output to the receiver for sampling, and imaging information is obtained. By using the transmitting module to transmit and send magnetic resonance signals and local oscillator signals, there is no need to set a local oscillator generating circuit and corresponding connection lines for generating local oscillator signals in the receiving module, which simplifies the structure of the receiving module and reduces the design cost.

Description

Technical Field

[0001] The present invention belongs to the technical field of magnetic resonance imaging, and in particular relates to a magnetic resonance imaging transceiver device and method, and a magnetic resonance imaging system. Background Art

[0002] Magnetic Resonance Imaging (MRI) technology is widely used in the medical field. MRI systems usually include MRI transceivers, system control and data processing computers, imaging operation and image analysis workbenches, and mobile examination beds.

[0003] In a conventional magnetic resonance imaging transceiver, a receiving coil is provided in a magnetic resonance receiving module to receive a magnetic resonance signal, and a local oscillator signal generator is provided to generate a local oscillator signal. The local oscillator signal is mixed with the magnetic resonance signal to generate a mixed signal, and a magnetic resonance signal is obtained after subsequent amplification, filtering, detection and the like, and image information is formed based on the magnetic resonance signal.

[0004] However, since the receiving coil and the local oscillator signal generator need to be set synchronously in the magnetic resonance receiving module, the receiving module has the problems of high cost and large size. Summary of the invention

[0005] The object of the present invention is to provide a magnetic resonance imaging transceiver, aiming to solve the problems of high cost and large size of the receiving module of the traditional magnetic resonance imaging transceiver.

[0006] A first aspect of an embodiment of the present invention provides a magnetic resonance imaging transceiver, comprising:

[0007] A transmitting module, used for transmitting a radio frequency signal and / or a local oscillator signal;

[0008] A receiving module, the receiving module includes a receiving coil, a processing circuit and a receiver, the receiving coil is used to receive the local oscillator signal and / or the magnetic resonance signal; the processing circuit is used to process the local oscillator signal and the magnetic resonance signal to determine a combined signal, and transmit the combined signal to the receiver; the receiver is used to collect and process the combined signal.

[0009] Optionally, the transmitting module includes:

[0010] Transmitting coil;

[0011] The transmitting circuit is connected to the transmitting coil and is used to transmit the radio frequency signal in a transmitting period and transmit the local oscillator signal in a signal sampling period through the transmitting coil.

[0012] Optionally, the transmitting circuit includes:

[0013] A signal output circuit, used to output the radio frequency signal during a transmission period and output the local oscillator signal during a signal sampling period;

[0014] A power amplifier circuit, connected to the signal output circuit, for performing power amplification on the radio frequency signal and the local oscillator signal respectively, and outputting the amplified radio frequency signal and the local oscillator signal in a time-sharing manner;

[0015] The transmitting coil is connected to the power amplifier circuit, and is used for sending the radio frequency signal and the local oscillator signal in a time-sharing manner.

[0016] Optionally, the power amplification circuit includes a broadband power amplifier, which is connected to the signal output end of the signal output circuit, and is used to receive the radio frequency signal and the local oscillator signal output by the signal output circuit in time-sharing mode and perform power amplification on them respectively, and output the amplified radio frequency signal and the local oscillator signal in time-sharing mode;

[0017] The transmitting coil includes a first transmitting coil, which is connected to the power amplifier circuit. The first transmitting coil is used to send the radio frequency signal and the local oscillator signal in time division. The first transmitting coil has multiple resonant frequency points corresponding to the frequencies of the radio frequency signal and the local oscillator signal.

[0018] Optionally, the signal output circuit includes:

[0019] A first signal output unit, configured to output the radio frequency signal;

[0020] A second signal output unit, used for outputting the local oscillator signal;

[0021] a switching switch, connected to the first signal output unit, the second signal output unit and the broadband power amplifier, respectively, and configured to be triggered by a first switch switching signal to output the radio frequency signal, and triggered by a second switch switching signal to output the local oscillator signal;

[0022] The first controller is connected to the first signal output unit, the second signal output unit and the switch, respectively, and is used to output the first switch switching signal in the transmission period and output the second switch switching signal in the signal sampling period.

[0023] Optionally, the power amplifier circuit includes:

[0024] a first narrowband power amplifier connected to the first signal output terminal of the signal output circuit, configured to amplify the power of the radio frequency signal and output the amplified radio frequency signal;

[0025] a second narrowband power amplifier connected to the second signal output terminal of the signal output circuit, configured to amplify the power of the local oscillator signal and output the amplified local oscillator signal;

[0026] The transmitting coil comprises:

[0027] a second transmitting coil, connected to the first narrowband power amplifier, and configured to transmit the radio frequency signal, wherein the second transmitting coil has a resonant frequency corresponding to the frequency of the radio frequency signal;

[0028] The third transmitting coil is connected to the second narrowband power amplifier and is used to send the local oscillator signal. The third transmitting coil has a resonance frequency corresponding to the frequency of the local oscillator signal.

[0029] Optionally, the signal output circuit includes:

[0030] A third signal output unit, connected to the first narrowband power amplifier, and configured to be triggered by a first control signal to output the radio frequency signal;

[0031] a fourth signal output unit, connected to the second narrowband power amplifier, and configured to be triggered by a second control signal to output the local oscillation signal;

[0032] The second controller is connected to the third signal output unit and the fourth signal output unit respectively, and is used to output the first control signal in the transmission period and output the second control signal in the signal sampling period.

[0033] Optionally, the fourth signal output unit and the second narrowband power amplifier are arranged in the third transmitting coil.

[0034] Optionally, the second transmitting coil and the third transmitting coil are arranged adjacent to each other, and the second transmitting coil and the third transmitting coil are arranged opposite to the receiving coil;

[0035] Alternatively, the second transmitting coil is arranged opposite to the receiving coil, and the third transmitting coil is stacked on the receiving coil.

[0036] Optionally, the receiving coil comprises:

[0037] A first receiving coil, used for receiving the magnetic resonance signal;

[0038] A second receiving coil, used for receiving the local oscillator signal;

[0039] The processing circuit comprises:

[0040] A mixer, connected to the first receiving coil and the second receiving coil respectively, for mixing the magnetic resonance signal and the local oscillator signal, and outputting a mixed signal;

[0041] A combiner is connected to the mixer and the first receiving coil, and is used for receiving and outputting a combined signal of the magnetic resonance signal and the mixing signal.

[0042] Optionally, the combiner outputs the combined signal to the receiver via a cable.

[0043] Optionally, when the transmitting module includes a second transmitting coil for transmitting the radio frequency signal and a third transmitting coil for transmitting the local oscillator signal;

[0044] The second transmitting coil and the first receiving coil are multiplexed.

[0045] Optionally, the second receiving coil comprises a plurality of receiving coils, and the plurality of receiving coils are coupled to a same cable and connected to the mixer through the cable.

[0046] Optionally, the receiver includes:

[0047] A splitter connected to the combiner, used for filtering and frequency dividing the combined signal, and outputting the magnetic resonance signal and the mixed signal respectively;

[0048] The sampling circuit is connected to the splitter and is used to sample the magnetic resonance signal and the mixing signal respectively to obtain image information corresponding to the mixing signal and the magnetic resonance signal.

[0049] A second aspect of an embodiment of the present invention provides a magnetic resonance imaging system, comprising the magnetic resonance imaging transceiver as described above.

[0050] A third aspect of an embodiment of the present invention provides a magnetic resonance imaging transceiver method, which is applied to the magnetic resonance imaging transceiver device as described above. The magnetic resonance imaging transceiver method includes:

[0051] A transmitting module is used to transmit a radio frequency signal and / or a local oscillator signal;

[0052] A receiving module is used to receive the local oscillator signal and / or the magnetic resonance signal, and sampling and processing are performed to obtain a combined signal and image information corresponding to the combined signal.

[0053] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the magnetic resonance imaging transceiver comprises a transmitting module and a receiving module, the transmitting module is used to transmit radio frequency signals and / or local oscillator signals, the receiving module comprises a receiving coil, a processing circuit and a receiver, the processing circuit receives the magnetic resonance signal and / or the local oscillator signal through the receiving coil, and performs signal processing to obtain a combined signal, the combined signal is output to the receiver for sampling, and imaging information is obtained. By using the transmitting module to transmit and send the magnetic resonance signal and the local oscillator signal, there is no need to set a local oscillator generating circuit and corresponding connection lines for generating the local oscillator signal in the receiving module, which simplifies the structure of the receiving module and reduces the design cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0055] Figure 1 A schematic diagram of a first structure of a magnetic resonance imaging transceiver provided by an embodiment of the present invention;

[0056] Figure 2 A second structural schematic diagram of a magnetic resonance imaging transceiver provided by an embodiment of the present invention;

[0057] Figure 3 A schematic diagram of a first structure of a transmitting module provided in an embodiment of the present invention;

[0058] Figure 4 A second structural schematic diagram of a transmitting module provided in an embodiment of the present invention;

[0059] Figure 5 A third structural schematic diagram of a transmitting module provided in an embodiment of the present invention;

[0060] Figure 6 A fourth structural schematic diagram of a transmitting module provided by an embodiment of the present invention;

[0061] Figure 7 A schematic structural diagram of a third transmitting coil provided in an embodiment of the present invention;

[0062] Figure 8 A schematic diagram of a first position of a transmitting coil and a receiving coil provided in an embodiment of the present invention;

[0063] Fig. 9 A schematic diagram of a second position of a transmitting coil and a receiving coil provided in an embodiment of the present invention;

[0064] Fig.10 A schematic diagram of the structure of a receiving coil and a processing circuit provided in an embodiment of the present invention;

[0065] Fig.11 A schematic diagram of coupling connection of a receiving coil provided in an embodiment of the present invention;

[0066] Fig.12 A schematic diagram of the structure of a receiver provided by an embodiment of the present invention;

[0067] Fig.13 A schematic diagram of a flow chart of a magnetic resonance imaging transceiver method provided in an embodiment of the present invention.

[0068] Among them, the reference numerals in the figures are:

[0069] 1. Test unit; 100. Transmitting module; 200. Receiving module; 110. Transmitting coil; 120. Transmitting circuit; 210. Receiving coil; 220. Processing circuit; 230. Receiver; 121. Signal output circuit; 122. Power amplifier circuit; 1221. Broadband power amplifier; 1211. First signal output unit; 1212. Second signal output unit; 1213. Switch; 1214. First controller; 1215. Third signal output unit; 1216. Fourth signal output unit; 1217. Second controller controller; 1222, a first narrowband power amplifier; 1223, a second narrowband power amplifier; 111, a first transmitting coil; 112, a second transmitting coil; 113, a third transmitting coil; 211, a first receiving coil; 212, a second receiving coil; 221, a mixer; 222, a combiner; 231, a splitter; 232, a sampling circuit; 2321, a first signal conditioning circuit; 2322, a second signal conditioning circuit; 2323, a first analog-to-digital sampling circuit; 2324, a second analog-to-digital sampling circuit; 2325, a third controller. DETAILED DESCRIPTION

[0070] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0071] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0072] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] A first aspect of an embodiment of the present invention provides a magnetic resonance imaging transceiver.

[0075] like Figure 1 As shown, the magnetic resonance imaging transceiver comprises:

[0076] The transmitting module 100 is used to transmit a radio frequency signal and / or a local oscillator signal;

[0077] The receiving module 200 includes a receiving coil 210, a processing circuit 220 and a receiver 230. The receiving coil 210 is used to receive a local oscillator signal and / or a magnetic resonance signal; the processing circuit 220 is used to process the local oscillator signal and the magnetic resonance signal to determine a combined signal, and transmit the combined signal to the receiver 230; the receiver 230 is used to collect and process the combined signal.

[0078] In this embodiment, the transmitting module 100 can transmit at least one of a radio frequency signal and a local oscillator signal. When one type of signal is output, the other type of signal can be output by other transmitting units or signal generating circuits. Correspondingly, the receiving module 200 can be used to receive at least one of the corresponding magnetic resonance signal and the local oscillator signal. When the receiving module 200 receives one type of signal through the coil, the other type of signal can be received by other receiving units and combined in the processing circuit 220 to obtain a combined signal of the local oscillator signal and the magnetic resonance signal.

[0079] In an optional embodiment, the transmitting module 100 sends the radio frequency signal and the local oscillator signal in a time-sharing manner, and the processing circuit 220 receives the magnetic resonance signal and the local oscillator signal synchronously through the receiving coil 210 .

[0080] The magnetic resonance imaging transceiver can work in the transmission period and the signal sampling period respectively. During the transmission period, the transmission module 100 generates a radio frequency signal, which is a high-frequency signal with a Larmor frequency. The radio frequency signal is transmitted to the examined part 1 to generate a magnetic resonance signal. The receiving coil 210 can receive the magnetic resonance signal in the near field area of ​​the magnetic resonance signal.

[0081] During the signal sampling period, i.e., the period when the receiving coil 210 samples and receives the magnetic resonance signal, the transmitting module 100 transmits the local oscillator signal, and the local oscillator signal is sent to the receiving coil 210. The receiving coil 210 receives the magnetic resonance signal and / or the local oscillator signal respectively, and transmits it to the processing circuit 220. The processing circuit 220 performs signal processing on the magnetic resonance signal and the local oscillator signal, such as mixing, combining, etc., to obtain a combined signal. After receiving the combined signal, the receiver 230 can filter, sample, etc. the combined signal to obtain a magnetic resonance signal. The imaging module can obtain image information based on the magnetic resonance signal imaging.

[0082] By combining the magnetic resonance signals for output, high-frequency to intermediate-frequency conversion can be achieved, so that in subsequent signal processing, corresponding intermediate-frequency devices can be used for signal processing, without the need to set up too many high-frequency devices and high-frequency processing, thereby reducing the difficulty of signal processing.

[0083] Furthermore, in the magnetic resonance imaging transceiver, there is no need to set a local oscillator generating circuit and corresponding lines, cables, etc. for generating a local oscillator signal in the receiving module 200, and the transmitting module 100 is directly used to transmit the local oscillator signal in a wireless transmission manner, which simplifies the structure of the receiving module 200 and the magnetic resonance imaging transceiver and reduces the cost. At the same time, the local oscillator signal and the radio frequency signal are transmitted in time-sharing manner, which does not affect the transmission of the radio frequency signal, and the synchronous reception of the magnetic resonance signal and the radio frequency signal can be realized at the receiving end, which improves the timeliness and reliability of the signal reception and processing of the receiving module 200.

[0084] The transmitting module 100 may use a corresponding number and type of transmitting coils 110 and a driving circuit, etc. In an optional embodiment, as shown in FIG. Figure 2 As shown, the transmitting module 100 includes:

[0085] Transmitting coil 110;

[0086] The transmitting circuit 120 is connected to the transmitting coil 110 and is used to transmit a radio frequency signal during a transmitting period and transmit a local oscillator signal during a signal sampling period through the transmitting coil 110 .

[0087] In this embodiment, the magnetic resonance imaging transceiver operates in a transmission period and a signal sampling period respectively. During the transmission period, the transmitting circuit 120 generates a radio frequency signal, and the radio frequency signal is transmitted to the examined part 1 through the transmitting coil 110 to generate a magnetic resonance signal. The receiving coil 210 can receive the magnetic resonance signal in the near field area of ​​the magnetic resonance signal.

[0088] During the signal sampling period, that is, the period when the receiving coil 210 samples and receives the magnetic resonance signal, the transmitting circuit 120 simultaneously transmits the local oscillator signal through the transmitting coil 110 during the signal sampling period, and the local oscillator signal is sent to the receiving coil 210. The receiving coil 210 receives the magnetic resonance signal and the local oscillator signal respectively, and transmits them to the processing circuit 220. The processing circuit 220 performs signal processing on the magnetic resonance signal and the local oscillator signal, such as mixing and combining, to obtain a combined signal. After receiving the combined signal, the receiver 230 can filter, sample and other processes on the combined signal to obtain a magnetic resonance signal. The imaging module can obtain image information based on the magnetic resonance signal imaging.

[0089] The local oscillator generating circuit or component for generating the local oscillator signal is arranged in the transmitting module 100, and there is no need to arrange the local oscillator generating circuit and corresponding lines, cables, etc. for generating the local oscillator signal in the receiving module 200, thereby simplifying the structure of the receiving module 200 and the magnetic resonance imaging transceiver and reducing the cost.

[0090] The transmitting circuit 120 may adopt a corresponding driving circuit, power amplifier and other structures. In an optional embodiment, Figure 3 As shown, the transmitting circuit 120 includes:

[0091] The signal output circuit 121 is used to output the radio frequency signal during the transmission period and output the local oscillator signal during the signal sampling period;

[0092] The power amplifier circuit 122 is connected to the signal output circuit 121, and is used to amplify the power of the radio frequency signal and the local oscillator signal respectively, and output the amplified radio frequency signal and the local oscillator signal in a time-sharing manner;

[0093] The transmitting coil 110 is connected to the power amplifier circuit 122 , and the transmitting coil 110 is used to send the radio frequency signal and the local oscillator signal in a time-sharing manner.

[0094] In this embodiment, the signal output circuit 121 may adopt one or more signal generating circuits, switching circuits, etc. During the transmission period, the signal output circuit 121 outputs the radio frequency signal to the power amplifier circuit 122, and the power amplifier circuit 122 outputs the radio frequency signal to the transmitting coil 110 after power amplification. The transmitting coil 110 transmits the radio frequency signal to the examined part 1 to generate a magnetic resonance signal, and the magnetic resonance signal is transmitted to the receiving module 200.

[0095] During the signal sampling period, i.e., the period when the receiving coil 210 samples and receives the magnetic resonance signal, the signal output circuit 121 simultaneously outputs the local oscillator signal. After being amplified by the power amplifier circuit 122, the local oscillator signal is transmitted to the receiving coil 210 through the transmitting coil 110. The receiving coil 210 receives the magnetic resonance signal and the local oscillator signal respectively, and transmits them to the processing circuit 220. The processing circuit 220 performs signal processing on the magnetic resonance signal and the local oscillator signal, such as mixing and combining, to obtain a combined signal. After receiving the combined signal, the receiver 230 can filter, sample, and other processes on the combined signal to obtain a magnetic resonance signal. The imaging module can obtain image information based on the magnetic resonance signal imaging.

[0096] By using the signal output circuit 121 as the local oscillator generating circuit of the local oscillator signal, the local oscillator generating circuit or component for generating the local oscillator signal is set in the transmitting module 100, and there is no need to set the local oscillator generating circuit and the corresponding lines, cables, etc. for generating the local oscillator signal in the receiving module 200, thereby simplifying the structure of the receiving module 200 and the magnetic resonance imaging transceiver and reducing the cost. And the power amplifier circuit 122 and the transmitting coil 110 are used to amplify and send the radio frequency signal and the local oscillator signal in time division, which can ensure that the signal is maintained at the preset power and improve the reliability of the output signal.

[0097] Among them, since the resonant frequencies of the local oscillator signal and the radio frequency signal are different, in order to achieve signal output and transmission with different resonant frequencies, the power amplifier circuit 122 can adopt a wide-bandwidth power amplifier circuit 122 or adopt a plurality of narrow-bandwidth power amplifier circuits 122 each having a narrow bandwidth. Correspondingly, corresponding to the structure of the power amplifier circuit 122, the transmitting coil 110 can adopt a transmitting coil 110 with multiple resonant frequency points, or adopt a plurality of transmitting coils 110 with a single resonant frequency point, so as to achieve separate power amplification and time-sharing transmission of the radio frequency signal and the local oscillator signal.

[0098] In one of the optional embodiments, Figure 4 As shown, the power amplifier circuit 122 includes a broadband power amplifier 1221, which is connected to the signal output end of the signal output circuit 121. The broadband power amplifier 1221 is used to receive the radio frequency signal and the local oscillator signal outputted by the signal output circuit 121 in a time-sharing manner and perform power amplification respectively, and output the amplified radio frequency signal and the local oscillator signal in a time-sharing manner;

[0099] The transmitting coil 110 includes a first transmitting coil 111, which is connected to the power amplifier circuit 122. The first transmitting coil 111 is used to send radio frequency signals and local oscillator signals in time division. The first transmitting coil 111 has multiple resonant frequency points corresponding to the frequencies of the radio frequency signals and the local oscillator signals.

[0100] In this embodiment, the bandwidth of the broadband power amplifier 1221 is larger than that of the narrowband power amplifier. The broadband power amplifier 1221 can provide a relatively high gain. Due to its wide bandwidth, it can amplify signals of a preset frequency bandwidth, and the frequency bandwidth includes the frequencies of the radio frequency signal and the local oscillator signal. The radio frequency signal and the local oscillator signal can be power amplified by the broadband power amplifier 1221 in a time-sharing manner, which can achieve the purpose of simplifying the structure of the power amplifier circuit 122 and reduce the design cost. In addition, the broadband power amplifier 1221 used to amplify the radio frequency signal is reused, and the broadband power amplifier 1221 can amplify and output the local oscillator signal, which reduces the number of local oscillator generation circuits, simplifies the structure of the transmitting module 100 and reduces the design cost.

[0101] Correspondingly, the first transmitting coil 111 has multiple resonant frequencies and can transmit received radio frequency signals and local oscillator signals of different frequencies. One transmitting coil 110 can be used to transmit different signals, thereby simplifying the coil structure of the transmitting module 100 .

[0102] The signal output circuit 121 includes at least one signal output terminal. The signal output circuit 121 can output the RF signal and the LO signal in time-sharing mode through one signal output terminal, or output the RF signal and the LO signal in different time periods through different signal output circuits 121 .

[0103] During the transmission period, the signal output circuit 121 outputs the RF signal to the broadband power amplifier 1221. The broadband power amplifier 1221 amplifies the RF signal of the corresponding frequency and outputs it to the first transmitting coil 111. The first transmitting coil 111 transmits the RF signal to the examined part 1, and the generated magnetic resonance signal is transmitted to the receiving module 200.

[0104] During the signal sampling period, i.e., the period when the receiving coil 210 samples and receives the magnetic resonance signal, the signal output circuit 121 simultaneously outputs the local oscillator signal, the broadband power amplifier 1221 amplifies the local oscillator signal of the corresponding frequency and outputs it to the first transmitting coil 111, which is then transmitted to the receiving coil 210 through the first transmitting coil 111. The receiving coil 210 receives the magnetic resonance signal and the local oscillator signal respectively, and transmits them to the processing circuit 220. The processing circuit 220 performs signal processing on the magnetic resonance signal and the local oscillator signal, such as mixing and combining, to obtain a combined signal. After receiving the combined signal, the receiver 230 can filter, sample, and other processes on the combined signal to obtain a magnetic resonance signal. The imaging module can obtain image information based on the magnetic resonance signal imaging.

[0105] The first transmitting coil 111 may be a cylindrical coil, a surface coil or the like.

[0106] Corresponding to the broadband power amplifier 1221 and the first transmitting coil 111, in an optional embodiment, as Figure 5 As shown, the signal output circuit 121 includes:

[0107] A first signal output unit 1211, configured to output a radio frequency signal;

[0108] The second signal output unit 1212 is used to output a local oscillator signal;

[0109] The switching switch 1213 is connected to the first signal output unit 1211, the second signal output unit 1212 and the broadband power amplifier 1221, respectively, and is used to be triggered by the first switch switching signal to output the radio frequency signal, and triggered by the second switch switching signal to output the local oscillator signal;

[0110] The first controller 1214 is connected to the first signal output unit 1211, the second signal output unit 1212 and the switch 1213 respectively, and is used to output a first switch switching signal in the transmission period and output a second switch switching signal in the signal sampling period.

[0111] In this embodiment, the first signal output unit 1211 and the second signal output unit 1212 can adopt structures such as a signal source and a driving circuit, and are used to output a radio frequency signal and a local oscillator signal respectively. The first signal output unit 1211 and the second signal output unit 1212 can also be connected to the first controller 1214 respectively, and trigger the signal output work under the control of the first controller 1214.

[0112] The time when the first signal output unit 1211 outputs a signal can be output in a time-sharing manner with the time when the second signal output unit 1212 outputs a signal.

[0113] When the two signal output units output signals in time-sharing, during the transmission period, the first controller 1214 outputs a control signal to control the first signal output unit 1211 to output a radio frequency signal, and at the same time outputs a first switch switching signal to control the switch 1213 to switch to the first switch state. The radio frequency signal is output to the broadband power amplifier 1221 through the switch 1213, and the signal is amplified and transmitted to the receiving module 200 through the first transmitting coil 111.

[0114] During the signal sampling period, the first controller 1214 outputs a control signal to control the second signal output unit 1212 to output a local oscillator signal, and at the same time outputs a second switch switching signal to control the switch 1213 to switch to the second switch state. The second signal output unit 1212 is connected to the broadband power amplifier 1221, and the local oscillator signal is transmitted to the broadband power amplifier 1221 for signal amplification and is transmitted to the inspected part 1 through the first transmitting coil 111.

[0115] The first signal output unit 1211 may adopt a corresponding analog-to-digital converter, a signal conditioning circuit, etc., and the second signal output unit 1212 may adopt a corresponding direct digital synthesizer (DDS), a signal conditioning circuit, etc.

[0116] The switching switch 1213 has two input terminals and one output terminal, and can be generated by a combination of multiple switches, or a switching switch, such as a single-pole double-throw switch, etc., and the specific structure is not limited.

[0117] In another alternative embodiment, Figure 6 As shown, the power amplifier circuit 122 includes:

[0118] A first narrowband power amplifier 1222 is connected to the first signal output terminal of the signal output circuit 121, and is used to amplify the power of the radio frequency signal and output the amplified radio frequency signal;

[0119] The second narrowband power amplifier 1223 is connected to the second signal output terminal of the signal output circuit 121, and is used to amplify the power of the local oscillator signal and output the amplified local oscillator signal;

[0120] The transmitting coil 110 includes:

[0121] The second transmitting coil 112 is connected to the first narrowband power amplifier 1222 and is used to send a radio frequency signal. The second transmitting coil 112 has a resonant frequency corresponding to the frequency of the radio frequency signal;

[0122] The third transmitting coil 113 is connected to the second narrowband power amplifier 1223 and is used to send a local oscillation signal. The third transmitting coil 113 has a resonance frequency point corresponding to the frequency of the local oscillation signal.

[0123] In this embodiment, the signal output circuit 121 includes a first signal output terminal and a second signal output terminal. The first narrowband power amplifier 1222 is a single-frequency power amplifier module that amplifies the power of a single frequency signal. Correspondingly, the transmitting coil 110 is provided with a second transmitting coil 112 and a third transmitting coil 113 relative to the first narrowband power amplifier 1222 and the second narrowband power amplifier 1223, and transmits the amplified radio frequency signal and local oscillator signal respectively.

[0124] Among them, the second transmitting coil 112 is a single-frequency transmitting coil 110, and its resonant frequency corresponds to the radio frequency signal. After receiving the radio frequency signal, the second transmitting coil 112 sends the radio frequency signal. Correspondingly, the third transmitting coil 113 is also a single-frequency transmitting coil 110, and its resonant frequency corresponds to the local oscillation signal. After receiving the local oscillation signal, the third transmitting coil 113 sends the local oscillation signal.

[0125] The signal output circuit 121 may adopt one or more signal generators, switching circuits, etc. During the transmission period, the signal output circuit 121 outputs the radio frequency signal to the first narrowband power amplifier 1222 through the first signal output terminal. The first narrowband power amplifier 1222 amplifies the power and outputs it to the second transmitting coil 112. The second transmitting coil 112 transmits the radio frequency signal to the examined part 1, and the generated magnetic resonance signal is transmitted to the receiving module 200.

[0126] During the signal sampling period, i.e., the period when the receiving coil 210 samples and receives the magnetic resonance signal, the signal output circuit 121 simultaneously outputs the local oscillator signal through the second signal output terminal. The local oscillator signal is amplified by the second narrowband power amplifier 1223 and then output to the third transmitting coil 113. The third transmitting coil 113 transmits the local oscillator signal to the receiving coil 210. The receiving coil 210 receives the magnetic resonance signal and the local oscillator signal respectively, and transmits them to the processing circuit 220. The processing circuit 220 performs signal processing on the magnetic resonance signal and the local oscillator signal, such as mixing and combining, to obtain a combined signal. After receiving the combined signal, the receiver 230 can filter, sample, and other processes on the combined signal to obtain a magnetic resonance signal. The imaging module can obtain image information based on the magnetic resonance signal imaging.

[0127] By using a single-frequency power amplifier and a transmitting coil 110, the RF signal and the local oscillator signal are transmitted through different paths in the transmitting module 100, and the two do not interfere with each other. The RF signal and the local oscillator signal can be sent in time-sharing manner, thereby improving the efficiency and reliability of signal transmission.

[0128] Corresponding to the structure of the transmitting coil 110 and the power amplifier circuit 122, in an optional embodiment, as Figure 6 As shown, the signal output circuit 121 includes:

[0129] The third signal output unit 1215 is connected to the first narrowband power amplifier 1222 and is configured to be triggered by the first control signal to output a radio frequency signal;

[0130] The fourth signal output unit 1216 is connected to the second narrowband power amplifier 1223 and is configured to be triggered by the second control signal to output a local oscillation signal;

[0131] The second controller 1217 is connected to the third signal output unit 1215 and the fourth signal output unit 1216 respectively, and is used to output the first control signal in the transmission period and output the second control signal in the signal sampling period.

[0132] In this embodiment, the output end of the third signal output unit 1215 constitutes the first signal output end of the signal output circuit 121, and the output end of the fourth signal output unit 1216 constitutes the second signal output end of the signal output circuit 121. During the transmission period, the second controller 1217 outputs the first control signal to control the third signal output unit 1215 to output the radio frequency signal. At the same time, the second control signal is not output, and the fourth signal output unit 1216 does not output the local oscillation signal. The radio frequency signal is output to the first narrowband power amplifier 1222 and is power-amplified and output to the second transmitting coil 112. The radio frequency signal is transmitted to the inspected part 1 through the second transmitting coil 112.

[0133] During the signal sampling period, the second controller 1217 outputs a second control signal to control the fourth signal output unit 1216 to output a local oscillator signal, and does not output the first control signal. The third signal output unit 1215 does not output a radio frequency signal. The local oscillator signal is transmitted to the second narrowband power amplifier 1223 for signal amplification and is transmitted to the receiving module 200 through the third transmitting coil 113.

[0134] The third signal output unit 1215 may adopt a corresponding analog-to-digital converter, a signal conditioning circuit, etc., and the fourth signal output unit 1216 may adopt a corresponding DDS synthesizer, a signal conditioning circuit, etc.

[0135] In another optional embodiment, the local oscillator signal may also be transmitted by the corresponding transmitting coil 110, and a corresponding local oscillator generating circuit may be provided inside the transmitting coil 110, that is, Figure 7 As shown, in an optional embodiment, the fourth signal output unit 1216 and the second narrowband power amplifier 1223 are disposed in the third transmitting coil 113 .

[0136] In this embodiment, the third signal output unit 1215 and the first narrowband power amplifier 1222 are arranged in the transmitting circuit 120, and are connected to the second transmitting coil 112 and are arranged separately. In order to simplify the structure of the transmitting module 100, the fourth signal output unit 1216 and the second narrowband power amplifier 1223 for generating the local oscillator signal are arranged inside the transmitting coil 110. The local oscillator signal is transmitted through an independent circuit inside the transmitting coil 110. There is no need to additionally arrange a local oscillator generating circuit outside the third transmitting coil 113, thereby simplifying the structure of the transmitting module 100.

[0137] The second transmitting coil 112 is used to transmit radio frequency signals. The receiving coil 210 is set in a plane perpendicular to the radio frequency magnetic field and receives the magnetic resonance signal transmitted back by the examined part 1. Therefore, the second transmitting coil 112 and the receiving coil 210 are arranged opposite to each other. The third transmitting coil 113 is used to output a local oscillator signal. The setting position of the third transmitting coil 113 can be set according to the requirements.

[0138] In an alternative embodiment, if Figure 8 As shown, the second transmitting coil 112 and the third transmitting coil 113 are disposed adjacent to each other, and both the second transmitting coil 112 and the third transmitting coil 113 are disposed opposite to the receiving coil 210 .

[0139] That is, the second transmitting coil 112 and the third transmitting coil 113 are both arranged at the exit position of the radio frequency magnetic field, and transmit the radio frequency signal and the local oscillator signal in a time-sharing manner along the direction of the magnetic field. The receiving coil 210 simultaneously receives the radio frequency signal and the local oscillator signal during the signal sampling period, and transmits them to the processing circuit 220 for signal processing.

[0140] In another alternative embodiment, if Fig. 9 As shown, the second transmitting coil 112 is arranged opposite to the receiving coil 210 , and the third transmitting coil 113 is stacked on the receiving coil 210 .

[0141] In this embodiment, the second transmitting coil 112 is arranged at the exit position of the radio frequency magnetic field, and sends the radio frequency signal along the direction of the magnetic field. The third transmitting coil 113 is arranged on a plane perpendicular to the magnetic field, and sends the local oscillator signal to the receiving coil 210 during the signal sampling period. The receiving coil 210 simultaneously receives the radio frequency signal and the local oscillator signal during the signal sampling period, and transmits them to the processing circuit 220 for signal processing.

[0142] The receiving coil 210 may use a plurality of different coils to respectively receive magnetic resonance signals and local oscillator signals of different frequencies. In an optional embodiment, for example Fig.10 As shown, the receiving coil 210 includes:

[0143] A first receiving coil 211, used for receiving magnetic resonance signals;

[0144] The second receiving coil 212 is used to receive the local oscillator signal;

[0145] The processing circuit 220 includes:

[0146] The mixer 221 is connected to the first receiving coil 211 and the second receiving coil 212 respectively, and is used to mix the magnetic resonance signal and the local oscillation signal, and output a mixed signal;

[0147] The combiner 222 is connected to the mixer 221 and the first receiving coil 211, and is used for combining the received magnetic resonance signal and the mixed signal and outputting the combined signal.

[0148] In this embodiment, the receiving coil 210 includes at least a first receiving coil 211 and a second receiving coil 212 of two frequencies. The first receiving coil 211 is used to collect magnetic resonance signals, and the second receiving coil 212 is used to collect local oscillator signals. The two signals are sent to the mixer 221 through the coils. The mixer 221 mixes the magnetic resonance signal to generate a mixed signal, mixes the frequency to a frequency band that can enter the combiner 222 together with the magnetic resonance signal, and combines the magnetic resonance signal and the mixed signal in the combiner 222 to generate a combined signal. The combiner 222 outputs the combined signal to the receiver 230 through a cable. After receiving the combined signal, the receiver 230 can filter, sample, and process the combined signal to obtain a magnetic resonance signal. The imaging module can obtain image information based on the magnetic resonance signal imaging.

[0149] Among them, in a conventional receiving module 200, a first filter is usually set at the rear end of the mixer 221. The first filter filters out clutter and outputs a mixed signal containing a magnetic resonance signal and a local oscillator signal. The mixed signal is connected to the rear-end receiver 230 through an additional cable, and a local oscillator generating circuit and a second filter connected to the local oscillator generating circuit are set inside the receiving module 200. The second filter is used to filter the local oscillator signal. The filtered local oscillator signal is connected to the rear-end receiver 230 through an additional cable. In the conventional receiving module 200, an additional local oscillator generating circuit, corresponding filters and cables are required, and the structure is complex and the wiring is dense.

[0150] In this embodiment, compared with the conventional receiving module 200, a mixer 221 and a combiner 222 are provided in the processing circuit 220, the mixer 221 and the first receiving coil 211 are coupled and connected to the same cable, and the combined signal output by the combined output is output to the combiner 222 through the same cable. There is no need to additionally set a filter for filtering and a connecting cable at the rear end of the mixer 221 and the first receiving coil 211, which simplifies the internal circuit and cable structure of the receiving module 200 and reduces the overall design cost of the receiving module 200 and the magnetic resonance imaging transceiver.

[0151] Among them, since the transmission and reception of the radio frequency signal and the magnetic resonance signal are not at the same time, in order to simplify the magnetic resonance imaging transceiver, when the transmitting module 100 includes a second transmitting coil 112 for transmitting the radio frequency signal and a third transmitting coil 113 for transmitting the local oscillator signal, that is, different transmitting coils 110 are used to transmit the radio frequency signal and the local oscillator signal respectively, in an optional embodiment, the second transmitting coil 112 and the first receiving coil 211 are multiplexed, that is, in the transmission period of the radio frequency signal and the signal sampling period of the magnetic resonance signal, the same coil is used for signal transmission and reception, so as to realize the integration of transmission and reception and simplify the structure of the magnetic resonance imaging transceiver.

[0152] At the same time, the third transmitting coil 113 normally transmits the local oscillator signal during the signal sampling period, and the second receiving coil 212 normally receives the local oscillator signal during the signal sampling period, and works in a branch circuit with the multiplexed coil without affecting each other.

[0153] In addition, in order to improve the reception efficiency of the local oscillator signal, such as Fig.10 and Fig.11 As shown, multiple second receiving coils 212 can be provided and arranged in different directions and positions to receive local oscillator signals transmitted in different directions and improve signal receiving efficiency. Therefore, in order to simplify the structure of the receiving coil 210, in an optional embodiment, multiple second receiving coils 212 are coupled to the same cable and connected to the mixer 221 through the cable. By coupling and combining multiple local oscillator signals into one channel, it is not necessary to connect each second receiving coil 212 with a cable, thereby further achieving the purpose of reducing the number of receiving cables.

[0154] Corresponding to the processing circuit structure and the cable connection method, the receiver 230 includes:

[0155] A splitter 231, connected to the splitter 231, for filtering and dividing the combined signal, and outputting a magnetic resonance signal and a mixed signal respectively;

[0156] The sampling circuit 232 is connected to the splitter 231 and is used to sample the magnetic resonance signal and the mixing signal respectively to obtain image information corresponding to the mixing signal and the magnetic resonance signal.

[0157] In this embodiment, the combined output magnetic resonance signal and mixed signal are output to the splitter 231 through a cable. The splitter 231 separates the magnetic resonance signal and mixed signal of two different frequency bands and outputs them to the sampling circuit 232 respectively. The sampling circuit 232 performs further signal processing such as filtering and amplification on the signals of the two different frequency bands, and samples them respectively through different paths. The sampled waveforms can also be processed by digital signals to obtain magnetic resonance signals and mixed signals.

[0158] The splitter 231 can adopt corresponding filtering circuits, filters and other structures, and obtain two magnetic resonance signals and mixed signals of different frequency bands after frequency division and filtering. The sampling circuit 232 can adopt corresponding signal conditioning circuits, conversion circuits and the like. In an optional embodiment, as Fig. 9As shown, the sampling circuit 232 includes a first signal conditioning circuit 2321, a second signal conditioning circuit 2322, a first analog-to-digital sampling circuit, a second analog-to-digital sampling circuit and a third controller 2325. The first signal conditioning circuit 2321 receives the filtered magnetic resonance signal, and performs further filtering and amplification. The first analog-to-digital sampling circuit performs digital signal processing on the input magnetic resonance signal, and outputs the digital signal to the third controller 2325. At the same time, the second signal conditioning circuit 2322 receives the filtered mixing signal, and performs further filtering and amplification. The second analog-to-digital sampling circuit performs digital signal processing on the input mixing signal, and outputs the digital signal to the third controller 2325. The third controller 2325 reconstructs and analyzes the received magnetic resonance signal and mixing signal, and obtains image information, which is then displayed by the image module.

[0159] The third controller 2325 may be multiplexed with the first controller 1214 or the second controller 1217 or different controllers may be used respectively. To simplify the structure, the third controller 2325 may be multiplexed with the first controller 1214 or the second controller 1217 as the same controller.

[0160] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the magnetic resonance imaging transceiver comprises a transmitting module 100 and a receiving module 200, wherein the transmitting module 100 is used to transmit radio frequency signals and / or local oscillator signals, and the receiving module 200 comprises a receiving coil 210, a processing circuit 220 and a receiver 230, wherein the processing circuit 220 receives magnetic resonance signals and / or local oscillator signals through the receiving coil 210, and performs signal processing to obtain a combined signal, which is output to the receiver 230 for sampling, and imaging information is obtained. By adopting the transmitting module 100 to transmit and send magnetic resonance signals and local oscillator signals, there is no need to set a local oscillator generating circuit and corresponding connecting lines for generating local oscillator signals in the receiving module 200, thereby simplifying the structure of the receiving module 200 and reducing the design cost.

[0161] The present invention further provides a magnetic resonance imaging system, which includes a magnetic resonance imaging transceiver. The specific structure of the magnetic resonance imaging transceiver refers to the above embodiment. Since the magnetic resonance imaging system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0162] Corresponding to the above-mentioned magnetic resonance imaging transceiver, a third aspect of an embodiment of the present invention provides a magnetic resonance imaging transceiver method, such as Fig.13 As shown, in this embodiment, the magnetic resonance imaging transceiver method includes:

[0163] S10, using the transmitting module 100 to transmit a radio frequency signal and / or a local oscillator signal;

[0164] S20, using the receiving module 200 to receive the local oscillator signal and / or the magnetic resonance signal, and sampling and processing to obtain a combined signal and image information corresponding to the combined signal.

[0165] In this embodiment, the transmitting module 100 can be controlled to transmit at least one of the radio frequency signal and the local oscillator signal. When the transmitting module 100 outputs one type of signal, the other type of signal can be output by other transmitting units or signal generating circuits. Correspondingly, the receiving module 200 can be controlled to receive at least one of the corresponding magnetic resonance signal and the local oscillator signal. When the receiving module 200 receives one type of signal through the coil, the other type of signal can be received by other receiving units and combined in the processing circuit 220 to obtain a combined signal of the local oscillator signal and the magnetic resonance signal.

[0166] In an optional embodiment, the transmitting module 100 is used to send the radio frequency signal and the local oscillator signal in a time-sharing manner, and the receiving module 200 is used to synchronously receive the magnetic resonance signal and the local oscillator signal through the internal receiving coil 210 .

[0167] The magnetic resonance imaging transceiver can work in the transmission period and the signal sampling period respectively. During the transmission period, the control transmission module 100 is used to generate a radio frequency signal. The radio frequency signal is a high-frequency signal, and its frequency is the Larmor frequency. The radio frequency signal is transmitted to the inspected part 1 to generate a magnetic resonance signal. The receiving coil 210 can receive the magnetic resonance signal in the near field area of ​​the magnetic resonance signal.

[0168] During the signal sampling period, that is, the period when the receiving coil 210 samples and receives the magnetic resonance signal, the transmitting module 100 is controlled to transmit the local oscillator signal, and the local oscillator signal is sent to the receiving coil 210. The receiving coil 210 receives the magnetic resonance signal and / or the local oscillator signal respectively. The receiving module 200 performs signal processing on the magnetic resonance signal and the local oscillator signal, such as mixing, combining, etc., to obtain a combined signal, and the combined signal can be filtered, sampled, etc., so as to obtain a magnetic resonance signal. The magnetic resonance signal can be output to the imaging module, and the imaging module can obtain image information based on the magnetic resonance signal imaging.

[0169] Correspondingly, by setting the local oscillator generating circuit for transmitting the local oscillator signal in the transmitting module 100, it is not necessary to set the local oscillator generating circuit and the corresponding lines, cables, etc. for generating the local oscillator signal in the receiving module 200, and directly using the transmitting module 100 and the wireless transmission method to transmit the local oscillator signal, the structure of the receiving module 200 and the magnetic resonance imaging transceiver is simplified and the cost is reduced. At the same time, the local oscillator signal and the radio frequency signal are transmitted in time-sharing manner, which does not affect the transmission of the radio frequency signal, and the magnetic resonance signal and the radio frequency signal can be synchronously received at the receiving end, which improves the timeliness and reliability of the signal reception and processing of the receiving module 200.

[0170] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A magnetic resonance imaging transceiver, characterized in that: include: A transmitting module (100), used for transmitting a radio frequency signal and / or a local oscillator signal; A receiving module (200), the receiving module (200) comprising a receiving coil (210), a processing circuit (220) and a receiver (230), the receiving coil (210) being used to receive the local oscillator signal and / or the magnetic resonance signal; the processing circuit (220) being used to process the local oscillator signal and the magnetic resonance signal to determine a combined signal, and transmitting the combined signal to the receiver (230); and the receiver (230) being used to collect and process the combined signal.

2. The magnetic resonance imaging transceiver according to claim 1, characterized in that: The transmitting module (100) comprises: A transmitting coil (110); The transmitting circuit (120) is connected to the transmitting coil (110) and is used to transmit the radio frequency signal in a transmitting period and transmit the local oscillator signal in a signal sampling period through the transmitting coil (110).

3. The magnetic resonance imaging transceiver according to claim 2, characterized in that: The transmitting circuit (120) comprises: A signal output circuit (121), configured to output the radio frequency signal during a transmission period and output the local oscillator signal during a signal sampling period; A power amplifier circuit (122) connected to the signal output circuit (121), used to respectively amplify the power of the radio frequency signal and the local oscillator signal, and output the amplified radio frequency signal and the local oscillator signal in a time-sharing manner; The transmitting coil (110) is connected to the power amplifier circuit (122), and the transmitting coil (110) is used to send the radio frequency signal and the local oscillator signal in a time-sharing manner.

4. The magnetic resonance imaging transceiver according to claim 3, characterized in that: The power amplifier circuit (122) comprises a broadband power amplifier (1221), the broadband power amplifier (1221) being connected to the signal output end of the signal output circuit (121), the broadband power amplifier (1221) being used to receive the radio frequency signal and the local oscillator signal outputted in time-sharing by the signal output circuit (121) and to perform power amplification on them respectively, and to output the amplified radio frequency signal and the local oscillator signal in time-sharing; The transmitting coil (110) comprises a first transmitting coil (111), the first transmitting coil (111) is connected to the power amplifier circuit (122), the first transmitting coil (111) is used to send the radio frequency signal and the local oscillator signal in a time-sharing manner, and the first transmitting coil (111) has a plurality of resonant frequency points corresponding to the frequencies of the radio frequency signal and the local oscillator signal.

5. The magnetic resonance imaging transceiver according to claim 4, characterized in that: The signal output circuit (121) comprises: A first signal output unit (1211), configured to output the radio frequency signal; A second signal output unit (1212), configured to output the local oscillator signal; a switching switch (1213), connected to the first signal output unit (1211), the second signal output unit (1212) and the broadband power amplifier (1221), respectively, and configured to be triggered by a first switch switching signal to output the radio frequency signal, and triggered by a second switch switching signal to output the local oscillator signal; The first controller (1214) is respectively connected to the first signal output unit (1211), the second signal output unit (1212) and the switching switch (1213), and is used to output the first switch switching signal during the transmission period and output the second switch switching signal during the signal sampling period.

6. The magnetic resonance imaging transceiver according to claim 3, characterized in that: The power amplifier circuit (122) comprises: A first narrowband power amplifier (1222), connected to the first signal output terminal of the signal output circuit (121), used for amplifying the power of the radio frequency signal and outputting the amplified radio frequency signal; A second narrowband power amplifier (1223), connected to the second signal output terminal of the signal output circuit (121), for amplifying the power of the local oscillator signal and outputting the amplified local oscillator signal; The transmitting coil (110) comprises: A second transmitting coil (112) connected to the first narrowband power amplifier (1222) and used for transmitting the radio frequency signal, the second transmitting coil (112) having a resonance frequency corresponding to the frequency of the radio frequency signal; The third transmitting coil (113) is connected to the second narrowband power amplifier (1223) and is used to transmit the local oscillation signal. The third transmitting coil (113) has a resonance frequency corresponding to the frequency of the local oscillation signal.

7. The magnetic resonance imaging transceiver according to claim 6, characterized in that: The signal output circuit (121) comprises: A third signal output unit (1215), connected to the first narrowband power amplifier (1222), and configured to be triggered by a first control signal to output the radio frequency signal; a fourth signal output unit (1216), connected to the second narrowband power amplifier (1223), and configured to be triggered by a second control signal to output the local oscillation signal; The second controller (1217) is connected to the third signal output unit (1215) and the fourth signal output unit (1216) respectively, and is used to output the first control signal in the transmission period and output the second control signal in the signal sampling period.

8. The magnetic resonance imaging transceiver according to claim 7, characterized in that: The fourth signal output unit (1216) and the second narrowband power amplifier (1223) are arranged in the third transmitting coil (113).

9. The magnetic resonance imaging transceiver according to claim 6, characterized in that: The second transmitting coil (112) and the third transmitting coil (113) are arranged adjacent to each other, and the second transmitting coil (112) and the third transmitting coil (113) are both arranged opposite to the receiving coil (210); Alternatively, the second transmitting coil (112) is arranged opposite to the receiving coil (210), and the third transmitting coil (113) is stacked on the receiving coil (210).

10. The magnetic resonance imaging transceiver according to any one of claims 1 to 9, characterized in that: The receiving coil (210) comprises: A first receiving coil (211), used for receiving the magnetic resonance signal; A second receiving coil (212), used for receiving the local oscillator signal; The processing circuit (220) comprises: A mixer (221), connected to the first receiving coil (211) and the second receiving coil (212), respectively, for mixing the magnetic resonance signal and the local oscillation signal, and outputting a mixed signal; A combiner (222) is connected to the mixer (221) and the first receiving coil (211) and is used for combining, receiving and outputting a combined signal of the magnetic resonance signal and the mixing signal.

11. The magnetic resonance imaging transceiver according to claim 10, characterized in that: The combiner (222) outputs the combined signal to the receiver (230) via a cable.

12. The magnetic resonance imaging transceiver according to claim 10, characterized in that: When the transmitting module (100) comprises a second transmitting coil (112) for transmitting the radio frequency signal and a third transmitting coil (113) for transmitting the local oscillator signal; The second transmitting coil (112) and the first receiving coil (211) are multiplexed.

13. The magnetic resonance imaging transceiver according to claim 10, characterized in that: The second receiving coil (212) includes a plurality of second receiving coils (212), and the plurality of second receiving coils (212) are coupled to the same cable and connected to the mixer (221) through the cable.

14. The magnetic resonance imaging transceiver according to claim 10, characterized in that: The receiver (230) comprises: A splitter (231), connected to the combiner (222), configured to filter and divide the combined signal, and output the magnetic resonance signal and the mixed signal respectively; The sampling circuit (232) is connected to the splitter (231) and is used to sample the magnetic resonance signal and the mixing signal respectively to obtain image information corresponding to the mixing signal and the magnetic resonance signal.

15. A magnetic resonance imaging system, characterized in that: It comprises the magnetic resonance imaging transceiver as claimed in any one of claims 1 to 14.

16. A magnetic resonance imaging transceiver method, applied to the magnetic resonance imaging transceiver device according to any one of claims 1 to 14, characterized in that: The magnetic resonance imaging transceiver method comprises: Using a transmitting module (100) to transmit a radio frequency signal and / or a local oscillator signal; A receiving module (200) is used to receive the local oscillation signal and / or the magnetic resonance signal, and sample and process the signal to obtain a combined signal and image information corresponding to the combined signal.

Images