Clock transmission method for magnetic resonance imaging system, magnetic resonance imaging system and equipment

Abstract

This application relates to a clock transmission method, a magnetic resonance imaging system, and an apparatus for a magnetic resonance imaging (MRI) system. The method includes: converting a clock signal through a transmitting circuit to obtain a differential clock; converting the differential clock into an optical signal using the transmitting fiber optic device and transmitting it to a receiving fiber optic device; converting the optical signal into an electrical signal using the receiving fiber optic device and transmitting it to the receiving circuit; and converting the electrical signal into a single-channel clock and filtering it to obtain the clock signal. This application transmits the clock signal via optical fiber, which can achieve clock synchronization between the transmitting and receiving ends of the MRI system, ensuring phase coherence. Furthermore, optical fiber transmission exhibits low signal attenuation and enables long-distance transmission, ultimately effectively improving the stability and quality of the clock signal in the MRI system and contributing to improved imaging quality.

Description

Technical Field

[0001] This application relates to the field of magnetic resonance imaging technology, and in particular to a clock transmission method, magnetic resonance imaging system and device for magnetic resonance imaging systems. Background Technology

[0002] In magnetic resonance imaging (MRI) systems, to acquire high-quality magnetic resonance signals, the receiver chain is typically located inside a shielded enclosure to minimize signal attenuation and the effects of external electromagnetic interference. The signal acquisition system within the receiver chain must be driven by a high-frequency clock to achieve accurate sampling of weak magnetic resonance signals. To ensure phase coherence between the transmitted and received magnetic resonance signals, the transmitter and receiver chains must be synchronized using the same clock source. However, because the magnetic resonance transmitter chain contains high-power amplification equipment, it must be deployed outside the shielded enclosure for safety and heat dissipation considerations. Therefore, to ensure phase coherence between transmission and reception, the clock signal from the transmitter chain must be transmitted to the receiver chain inside the shielded enclosure to achieve phase synchronization.

[0003] In existing magnetic resonance systems, clock signals are commonly transmitted using coaxial cables. This method has several technical drawbacks in practical applications, including: weak anti-interference capability: In complex electromagnetic environments, clock signals transmitted via coaxial cables are susceptible to external electromagnetic interference, leading to clock jitter and phase shifts, thus affecting signal stability. Radiated interference: The clock signal itself is a high-frequency, strong interference source, and transmission via coaxial cables easily generates electromagnetic radiation, interfering with the normal operation of other sensitive electronic equipment inside and outside the shielding chamber. Significant signal attenuation: When clock signals are transmitted over long distances, the resistance and dielectric loss of the coaxial cable cause signal amplitude attenuation and waveform distortion, severely degrading clock quality and affecting system synchronization accuracy.

[0004] In summary, the existing technology uses coaxial cables to transmit clock signals, which cannot simultaneously meet the comprehensive requirements of anti-interference, low attenuation, high reliability and phase coherence in magnetic resonance systems. This restricts the improvement of the overall performance of magnetic resonance imaging systems and is not conducive to improving the imaging quality of magnetic resonance systems. Summary of the Invention

[0005] This application provides a clock transmission method, a magnetic resonance imaging system, and equipment for a magnetic resonance imaging system, in order to solve the problem that the existing technology uses coaxial cables to transmit clock signals, which cannot simultaneously meet the comprehensive requirements of anti-interference, low attenuation, high reliability, and phase coherence in the magnetic resonance system, resulting in poor overall performance of the magnetic resonance imaging system and the need to improve imaging quality.

[0006] According to one aspect of an embodiment of this application, this application provides a clock transmission method for a magnetic resonance imaging system. The magnetic resonance imaging system includes a transmitter circuit, a transmitter fiber optic device, a receiver fiber optic device, and a receiver circuit connected in sequence. The method includes: converting a clock signal through the transmitter circuit to obtain a differential clock; converting the differential clock into an optical signal based on the transmitter fiber optic device and sending it to the receiver fiber optic device; converting the optical signal into an electrical signal through the receiver fiber optic device and sending it to the receiver circuit; and converting the electrical signal into a single-channel clock and filtering it based on the receiver circuit to obtain the clock signal.

[0007] Optionally, the step of converting the clock signal through the transmitting circuit to obtain a differential clock includes: adjusting the gain of the clock signal through the transmitting gain amplification module in the transmitting circuit to obtain a single-ended clock amplification signal; and performing differential conversion on the single-ended clock amplification signal through the single-ended to differential balun circuit in the transmitting circuit to obtain the differential clock.

[0008] Optionally, the step of converting the differential clock into an optical signal based on the transmitting fiber optic device and sending it to the receiving fiber optic device includes: shaping and amplifying the differential clock using the transmitting signal processing module in the transmitting fiber optic device to extract the clock signal; performing electro-optic conversion on the extracted clock signal using the transmitting optical module in the transmitting fiber optic device to obtain the optical signal; and transmitting the optical signal to the receiving fiber optic device via an optical fiber.

[0009] Optionally, the step of converting the electrical signal into a single-channel clock and filtering it based on the receiving circuit to obtain the clock signal includes: converting the electrical signal into the single-channel clock through a differential-to-single-ended balun circuit in the receiving circuit; amplifying the single-channel clock through a receiving gain amplification module in the receiving circuit to obtain a single-channel amplified clock; and filtering the single-channel amplified clock through a filtering module in the receiving circuit to obtain the clock signal.

[0010] According to another aspect of the embodiments of this application, this application provides a magnetic resonance imaging system, and a clock transmission method applicable to the magnetic resonance imaging system, the magnetic resonance imaging system including a transmitting end circuit, a transmitting end optical fiber device electrically connected to the transmitting end circuit, a receiving end optical fiber device connected to the transmitting end optical fiber device via an optical fiber, and a receiving end circuit electrically connected to the receiving end optical fiber device, wherein: the transmitting end circuit is used to convert a clock signal to obtain a differential clock; the transmitting end optical fiber device is used to convert the differential clock into an optical signal and send it to the receiving end optical fiber device; the receiving end optical fiber device is used to convert the optical signal into an electrical signal and send it to the receiving end circuit; the receiving end circuit is used to convert the electrical signal into a single-channel clock and filter it to obtain the clock signal.

[0011] Optionally, the transmitting circuit includes a transmitting gain amplification module and a single-ended to differential balun circuit electrically connected to the transmitting gain amplification module; the transmitting gain amplification module is used to adjust the gain of the clock signal to obtain a single-ended clock amplification signal; the single-ended to differential balun circuit is used to perform differential conversion on the single-ended clock amplification signal to obtain the differential clock.

[0012] Optionally, the receiving end circuit includes a differential-to-single-ended balun circuit electrically connected to the receiving end optical fiber device, a receiving end gain amplification module electrically connected to the differential-to-single-ended balun circuit, and a filtering module electrically connected to the receiving end gain amplification module; the differential-to-single-ended balun circuit is used to convert the electrical signal into the single-channel clock; the receiving end gain amplification module is used to amplify the single-channel clock to obtain a single-channel amplified clock; and the filtering module is used to filter the single-channel amplified clock to obtain the clock signal.

[0013] Optionally, the single-ended to differential balun circuit includes a first resistor, a balun chip, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, and a diode array, wherein: the first differential signal output terminal of the balun chip is connected to the first input interface of the transmitting fiber optic device, the second differential signal output terminal of the balun chip is connected to the second input interface of the transmitting fiber optic device, and the ground terminal of the balun chip is grounded; one end of the first resistor is connected to the transmitting gain amplifier module, and the other end is connected to the single-ended signal input terminal of the balun chip; one end of the second resistor is connected to the first differential signal output terminal of the balun chip, and one end of the third resistor is connected to the first differential signal output terminal of the balun chip. Two differential signal output terminals; the other end of the second resistor is connected to the other end of the third resistor; the first capacitor is connected to the first input interface of the transmitting fiber optic device; the second capacitor is connected to the second input interface of the transmitting fiber optic device; one end of the third capacitor is connected between the second resistor and the third resistor, and the other end is grounded; the first and fourth connection terminals of the diode array are connected between the first differential signal output terminal of the balun chip and the first input interface of the transmitting fiber optic device; the second and third connection terminals of the diode array are connected between the second differential signal output terminal of the balun chip and the second input interface of the transmitting fiber optic device.

[0014] Optionally, the differential-to-single-ended balun circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first non-magnetic wire-wound inductor, and a second non-magnetic wire-wound inductor, wherein: one end of the fourth resistor is connected to the first output interface and the second output interface of the receiving fiber optic device, and the other end of the fourth resistor is connected to the receiving gain amplification module; the fourth capacitor and the first non-magnetic wire-wound inductor are connected in series between the fourth resistor and the first output interface of the receiving fiber optic device; and the fifth capacitor, the seventh resistor, and the ninth capacitor are connected in series between the fourth resistor and the second output interface of the receiving fiber optic device. The fifth resistor is connected in series with the sixth resistor. One end of the fifth resistor is connected between the fourth capacitor and the first non-magnetic wire-wound inductor. One end of the sixth resistor is connected between the fifth capacitor and the seventh resistor. One end of the sixth capacitor is connected between the fifth resistor and the sixth resistor, and the other end of the sixth capacitor is grounded. One end of the seventh capacitor is connected to one end of the first non-magnetic wire-wound inductor, and the other end of the seventh capacitor is grounded. One end of the eighth capacitor is connected to the other end of the first non-magnetic wire-wound inductor, and the other end of the eighth capacitor is grounded. One end of the second non-magnetic wire-wound inductor is connected between the seventh resistor and the ninth capacitor, and the other end of the second non-magnetic wire-wound inductor is grounded.

[0015] According to another aspect of the embodiments of this application, this application provides an electronic device, including: a processor, a memory, and a network interface. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory through the network interface, and the processor executes the machine-readable instructions to perform the steps of the clock transmission method of the magnetic resonance imaging system as described above.

[0016] Compared with related technologies, the technical solutions provided in this application have the following advantages: The clock transmission method for a magnetic resonance imaging (MRI) system provided in this application transmits clock signals via optical fiber. Based on the characteristics of optical fiber, it can meet the requirements of clock synchronization for transmission and reception in the MRI system, achieve phase coherence, effectively avoid clock signal interference and signal attenuation, and prevent the clock signal from becoming an interference source that interferes with other devices. Moreover, optical fiber transmission has virtually no signal attenuation and can also achieve long-distance transmission, solving the problem of limited clock transmission distance in MRI systems. Ultimately, it effectively improves the stability and quality of the clock signal in the MRI system, which helps to improve the imaging quality of the MRI system. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic flowchart of a clock transmission method for an optional magnetic resonance imaging system according to an embodiment of this application; Figure 2 This is a physical environment architecture diagram of an optional magnetic resonance imaging system according to an embodiment of this application; Figure 3 This is a flowchart illustrating an optional clock signal conversion and restoration method according to an embodiment of this application. Figure 4 This is a diagram illustrating the clock transmission process of an optional magnetic resonance imaging system according to an embodiment of this application. Figure 5 This is a block diagram of an optional magnetic resonance imaging system structure according to an embodiment of this application; Figure 6 This is an optional transmitter clock electro-optic conversion circuit diagram provided according to an embodiment of this application; Figure 7 This is an optional receiver clock electro-optic conversion circuit diagram provided according to an embodiment of this application; Figure 8 This is an optional single-ended to differential balun circuit diagram provided according to an embodiment of this application; Figure 9 This is an optional differential-to-single-ended balun circuit diagram provided according to an embodiment of this application; Figure 10 This is a schematic diagram of an optional electronic device structure provided in an embodiment of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] To address the problems mentioned in the background art, according to one aspect of the embodiments of this application, an embodiment of a clock transmission method for a magnetic resonance imaging system is provided.

[0021] It should be noted that the clock transmission method of the magnetic resonance imaging system provided in this application embodiment is generally executed by a server and / or the magnetic resonance imaging system. For example... Figure 1 As shown, Figure 1 This is a flowchart illustrating a clock transmission method for a magnetic resonance imaging (MRI) system provided in an embodiment of the present invention. Taking the clock transmission method of the MRI system being executed by the MRI system as an example, the MRI system includes a transmitter circuit, a transmitter fiber optic device, a receiver fiber optic device, and a receiver circuit connected in sequence. The clock transmission method of the MRI system includes the following steps: Step S102: Convert the clock signal through the transmitting circuit to obtain a differential clock.

[0022] Combination Figure 2 As shown, Figure 2 This embodiment provides a physical environment architecture diagram of an optional magnetic resonance imaging system. The shielded room (scanning room) houses the MRI scanner / receiver, which is a high-noise radio frequency environment with a strong static magnetic field, and the shielded room also possesses good electromagnetic shielding. The equipment room (technology room) includes a spectrometer: the system's main controller, generating precise timing control signals; an RFA (radio frequency amplifier): amplifying the transmitted radio frequency pulses; and a GRA (gradient amplifier): amplifying the gradient field waveform.

[0023] The aforementioned transmitting circuit and transmitting fiber optic device can be located within the spectrometer or independently of it. The aforementioned receiving fiber optic device and receiving circuit can be located within the receiver in the shielded room or independently of it. When the spectrometer generates the system master clock (clock signal), it outputs it to the transmitting circuit. The transmitting circuit amplifies the generated clock signal and performs single-ended to differential conversion, thereby converting it into a differential clock.

[0024] Step S104: Based on the transmitting fiber optic device, the differential clock is converted into an optical signal and sent to the receiving fiber optic device.

[0025] The converted differential clock signal remains an electrical signal and is output to the transmitting fiber optic device, which is electrically connected to the transmitting circuit. This transmitting fiber optic device is a fiber optic transceiver, including laser diodes (LDs) and light-emitting diodes (LEDs), which can be selected according to the scenario requirements. It can directly convert electrical energy into optical energy, that is, it can convert the differential clock into an optical signal. This optical signal is then further output to the receiving fiber optic device, which is connected to the transmitting fiber optic device via optical fiber.

[0026] Step S106: The optical signal is converted into an electrical signal and sent to the receiving circuit through the receiving optical fiber device.

[0027] The receiving fiber optic device can be a fiber optic transceiver, including but not limited to PIN photodiodes or APD avalanche photodiodes. The receiving fiber optic device can convert optical signals into electrical signals.

[0028] Specifically, photons are incident on the photosensitive surface of the receiving fiber optic device, generating photogenerated carriers through the photoelectric effect, forming a weak photocurrent, typically in the microampere or even nanoampere range. This photocurrent can be amplified by a low-noise preamplifier (LNA) and converted into a processable electrical signal. This electrical signal includes a voltage signal. Simultaneously, the circuit performs filtering to remove thermal noise, shot noise, and environmental interference generated during the photoelectric conversion process, improving signal quality.

[0029] Step S108: Based on the receiving end circuit, the electrical signal is converted into a single-channel clock and filtered to obtain the clock signal.

[0030] The amplified and conditioned electrical signal is sent to the receiving circuit, which further converts the received signal to obtain a single-channel clock. Since the single-channel clock signal is relatively small, it is further amplified. Because the fiber optic transceiver is a digital device, it introduces digital harmonic signals. Therefore, a bandpass filter can be used to filter out the harmonic signals, resulting in a clean, single-frequency clock signal.

[0031] Combination Figure 3As shown, Figure 3 This is a flowchart illustrating an optional clock signal conversion and restoration process provided in this embodiment. In this embodiment, the clock signal generated at the spectrometer end undergoes electro-optical conversion via the transmitting fiber optic device, and then is transmitted as an optical signal at the transmitting end. The signal is transmitted through an optical fiber to the receiving end, where it undergoes photoelectric conversion via the receiving fiber optic device to restore the optical signal to an electrical signal. Finally, the clock signal output by the spectrometer is restored in the receiver.

[0032] In this embodiment, the clock signal is transmitted via optical fiber. Based on the characteristics of optical fiber, the transmission and reception clock of the magnetic resonance imaging system can be synchronized, phase coherence can be achieved, and the clock signal can be effectively avoided from being interfered with and attenuated, as well as from the clock signal becoming an interference source that interferes with other devices. Moreover, optical fiber transmission has virtually no signal attenuation and can also achieve long-distance transmission, solving the problem of limited clock transmission distance in the magnetic resonance imaging system. Ultimately, this effectively improves the stability and quality of the clock signal in the magnetic resonance imaging system, which helps to improve the imaging quality of the magnetic resonance imaging system.

[0033] In some optional embodiments, step S102 above includes: S1021, The clock signal is gain-adjusted by the transmitter gain amplifier module in the transmitter circuit to obtain a single-ended clock amplified signal; S1022, the single-ended clock amplification signal is differentially converted by the single-ended to differential balun circuit in the transmitting circuit to obtain the differential clock.

[0034] Combination Figure 4 and Figure 5 As shown, the transmitter circuit includes a transmitter gain amplifier module and a single-ended to differential balun circuit. To ensure sufficient driving capability of the clock signal during electro-optical conversion to power the transmitter's fiber optic transceiver (fiber optic connector 1), a gain amplifier module is added to the transmitter circuit for clock signal gain adjustment, resulting in an amplified clock signal. Since the transmitter's fiber optic transceiver uses an LVDS interface, the single-ended clock amplified signal needs to be converted to a differential signal output via the single-ended to differential balun circuit before being fed to the fiber optic transceiver.

[0035] In this embodiment, the gain adjustment of the clock signal by the transmitter gain amplification module can compensate for the amplitude attenuation of the clock signal during transmission or pre-processing, so that the clock signal reaches the driving amplitude and level strength required by subsequent circuits, thereby improving the driving capability and anti-interference margin of the clock signal. The conversion of the single-ended clock amplification signal into a differential clock by the single-ended to differential balun circuit can effectively suppress common-mode interference, reduce noise coupling on the transmission path, and improve the signal-to-noise ratio, stability and timing accuracy of the clock signal in high-speed and long-distance transmission scenarios.

[0036] In some optional embodiments, step S104 above includes: S1041, The differential clock signal is extracted after being shaped and amplified by the transmitter signal processing module in the transmitter fiber optic device. S1042, the extracted clock signal is electro-optically converted by the transmitting optical module in the transmitting optical fiber device to obtain the optical signal; S1043, the optical signal is transmitted to the receiving optical fiber device via optical fiber.

[0037] The transmitting fiber optic device includes a transmitting signal processing module, which may include an equalizer (EQ) and a limiting amplifier. The differential clock from the transmitting circuit first enters the transceiver's electrical interface. The transmitting signal processing module amplifies and shapes the received differential clock, compensating for transmission line losses, restoring signal edges, and eliminating inter-symbol interference. The pre-processed electrical signal is then sent to the transmitting optical module, which converts the voltage signal into a high-current drive signal, generating a drive current of sufficient strength and rate to drive the transmitting optical module to convert it into an optical signal. For example, the drive current can be used to control the luminous intensity or switching state of the LD / LED. Optionally, for direct modulation: an electrical signal of "1" corresponds to high current and light emission, while an electrical signal of "0" corresponds to low current and no light emission, achieving light intensity modulation. For external modulation (high-speed long-distance): the LD emits light continuously, and then an external modulator changes the phase / intensity of the light according to the electrical signal, achieving higher bandwidth and lower dispersion.

[0038] Furthermore, the transmitting fiber optic device is equipped with an LVDS interface, which is used to optically connect to the fiber optic cable. This allows the optical signal emitted by the LD / LED to be efficiently coupled into the fiber optic cable and transmitted to the receiving fiber optic device. This reduces optical power loss and ensures transmission efficiency.

[0039] In some alternative examples, optical signal injection can also be based on a lens. The light emitted by the LD / LED is focused by a coupling lens and injected into the fiber core. The optical signal is transmitted in the fiber by total internal reflection, which can avoid energy leakage.

[0040] In this embodiment, by shaping and amplifying the differential clock before extracting the clock signal, transmission line loss can be compensated, signal edges can be restored, and inter-symbol interference can be eliminated. Electro-optical conversion is performed by the transmitting optical module to generate a driving current of sufficient strength and rate, which drives the transmitting optical module to convert the signal into an optical signal, reducing optical power loss and ensuring transmission efficiency. The converted optical signal is then transmitted to the receiving optical fiber device via optical fiber, ensuring clock synchronization between the magnetic resonance system's transmission and reception, achieving phase coherence, effectively avoiding clock signal interference and attenuation, and preventing the clock signal from becoming an interference source for other devices. Ultimately, this effectively improves the stability and quality of the magnetic resonance system's clock, contributing to improved imaging quality.

[0041] In some optional embodiments, step S108 above includes: S1081, the electrical signal is converted into the single-channel clock by the differential-to-single-ended balun circuit in the receiving end circuit; S1082, the single-channel clock is amplified by the receiver gain amplification module in the receiver circuit to obtain a single-channel amplified clock; S1083, the single-channel amplified clock is filtered by the filtering module in the receiving circuit to obtain the clock signal.

[0042] The receiving circuit includes a differential-to-single-ended balun circuit and a receiving gain amplifier module. The differential-to-single-ended balun circuit can convert a differential clock into a single-ended clock, and the receiving gain amplifier module can amplify the electrical signal.

[0043] Specifically, in combination Figure 4 As shown, the signal transmitted from the optical fiber is converted into an electrical signal by the optical fiber receiving device and transmitted to the receiving circuit. After passing through the differential-to-single-ended balun circuit in the receiving circuit, a single clock signal is output. At this point, the signal is relatively small and needs to be amplified by the receiving end gain amplifier module. Since the optical fiber transceiver is a digital device, it will introduce digital harmonic signals. Therefore, the back-end adds a filtering module to filter out the harmonic signals and obtain a clean, single-frequency clock signal, for example, by adding a bandpass filter.

[0044] The receiver circuit receives a differential signal. Since the subsequent gain amplifier and filter modules at the receiver are designed for single-ended signal input, they cannot directly process differential signals. Therefore, the signal conversion is achieved through a differential-to-single-ended balun circuit within the receiver circuit. This is combined with... Figure 5As shown, after the received electrical signal is input, the differential-to-single-ended balun circuit converts two differential electrical signals with equal amplitude and opposite phase into a single-ended electrical signal (single-channel clock) relative to ground potential. During the conversion process, since the common-mode interference of the differential signal manifests as noise synchronously superimposed in the two differential signals, the balun circuit cancels the common-mode noise components in the two signals during the balanced-to-unbalanced conversion process, while retaining the effective signal components in the differential signal. This ensures that the converted single-channel clock can completely retain the timing characteristics and frequency information of the original clock signal, avoiding problems such as signal distortion and timing offset during the conversion process. Furthermore, the single-channel clock output from the differential-to-single-ended balun circuit is input to the receiver's gain amplification module. This module amplifies the single-channel clock to obtain a single-channel amplified clock. The gain amplification module can provide adjustable gain control or fixed gain amplification according to the requirements of subsequent circuits, precisely compensating for amplitude attenuation during the initial transmission and conversion of the single-channel clock. This amplifies the single-channel clock amplitude to a preset range, ensuring sufficient driving capability to effectively drive the subsequent filtering module and the system's core circuitry. Simultaneously, the gain amplification module can calibrate the amplitude of the single-channel clock, reducing signal amplitude fluctuations in different scenarios, improving signal amplitude consistency, and avoiding subsequent filtering distortion and timing deviations caused by insufficient or fluctuating amplitude. It should be noted that this gain amplification process only adjusts the amplitude of the single-channel clock; it does not change the frequency or timing characteristics of the original clock signal, ensuring that the amplified single-channel clock fully retains the core information of the original clock signal, providing a stable and qualified input signal for subsequent filtering.

[0045] Furthermore, the single-channel amplified clock is filtered by the filtering module in the receiving circuit to restore the clock signal. While the amplified clock, after gain amplification, solves the problems of insufficient amplitude and poor consistency, it still contains two types of interference signals: First, during the operation of the receiving circuit, it is subject to interference from surrounding circuits and the electromagnetic environment, generating noise and high-frequency interference signals. Second, the gain amplification module itself generates certain inherent noise during operation, such as thermal noise, which is also superimposed on the signal, causing a decrease in the signal-to-noise ratio of the single-channel amplified clock. If used directly as the system clock signal, it will affect the system's operational stability and timing accuracy. Therefore, the filtering of the single-channel amplified clock by the filtering module in the receiving circuit addresses this issue. The filtering module can match targeted filtering circuits, such as low-pass filters and band-pass filters, according to the frequency characteristics of the original clock signal, such as clock frequency and bandwidth. This allows effective signals with the same frequency as the original clock signal to pass through, while suppressing and filtering out invalid interference signals such as noise, high-frequency interference, and inherent noise superimposed on the single-channel amplified clock, maximizing the signal-to-noise ratio of the single-channel amplified clock and reducing the impact of interference signals on the clock signal.

[0046] It should be noted that during the filtering process, it is necessary to ensure that the filtering module does not distort the valid clock signal, does not change the frequency or timing characteristics of the clock signal, and ensures that the clock signal output after filtering can accurately match the working requirements of the system's core circuit, providing the system with a stable, clean, and high-precision clock reference.

[0047] In this embodiment, the compatibility issue between the differential signal and the subsequent single-ended input circuit is effectively solved by using a differential-to-single-ended balun circuit. This achieves reliable conversion of the differential electrical signal to a single clock channel, while initially suppressing common-mode interference, preserving effective signal components, and avoiding signal distortion and timing shifts during conversion, thus laying a stable foundation for subsequent processing. The receiver gain amplification module provides targeted amplification, accurately compensating for the amplitude attenuation of the signal during transmission and conversion, boosting the signal amplitude to the driving range required by the subsequent circuit, and calibrating signal amplitude fluctuations and ensuring consistent amplitude boosting. The filtering module, based on the original clock signal frequency characteristics, accurately filters out invalid signals such as external electromagnetic interference and internal inherent noise superimposed on the single-channel amplified clock, maximizing the signal-to-noise ratio and purity of the clock signal, ensuring signal stability and integrity without distortion or alteration of core timing characteristics. Ultimately, without altering the core characteristics of the original clock signal such as frequency and timing, the entire signal conditioning process of "compatibility conversion → amplitude compensation → noise filtering" is completed, resulting in a stable, clean, and high-precision clock signal that provides a reliable clock reference for the system's core circuitry, effectively improving the overall system's operational stability, timing accuracy, and anti-interference capability.

[0048] According to another aspect of the embodiments of this application, such as Figure 5 As shown, corresponding to the clock transmission method of the magnetic resonance imaging system in the above embodiments, this embodiment provides a clock transmission system for a magnetic resonance imaging system. The magnetic resonance imaging system includes: Transmitter circuit 1, transmitter fiber optic device 2 electrically connected to transmitter circuit 1, receiver fiber optic device 3 connected to transmitter fiber optic device 2 via optical fiber, and receiver circuit 4 electrically connected to receiver fiber optic device 3, wherein: The transmitting circuit 1 is used to convert the clock signal to obtain a differential clock; The transmitting fiber optic device 2 is used to convert the differential clock into an optical signal and send it to the receiving fiber optic device 3. The receiving fiber optic device 3 is used to convert the optical signal into an electrical signal and send it to the receiving circuit 4; The receiving circuit 4 is used to convert the electrical signal into a single-channel clock and filter it to obtain the clock signal.

[0049] In the magnetic resonance imaging system, the transmitter circuit 1 and the transmitter fiber optic device 2 can be installed in the spectrometer in the equipment room, while the receiver fiber optic device 3 and the receiver circuit 4 can be installed in the receiver in the shielded room. The transmitter fiber optic device 2 and the receiver fiber optic device 3 are connected by fiber optics. The corresponding execution steps are completed based on each circuit and device.

[0050] In this embodiment, the clock signal is transmitted via optical fiber. Based on the characteristics of optical fiber, the transmission and reception clock of the magnetic resonance imaging system can be synchronized, phase coherence can be achieved, and the clock signal can be effectively avoided from being interfered with and attenuated, as well as from the clock signal becoming an interference source that interferes with other devices. Moreover, optical fiber transmission has virtually no signal attenuation and can also achieve long-distance transmission, solving the problem of limited clock transmission distance in the magnetic resonance imaging system. Ultimately, this effectively improves the stability and quality of the clock signal in the magnetic resonance imaging system, which helps to improve the imaging quality of the magnetic resonance imaging system.

[0051] like Figure 6 As shown, in some optional embodiments, the transmitter circuit 1 includes a transmitter gain amplifier module 11 and a single-ended to differential balun circuit 12 electrically connected to the transmitter gain amplifier module 11. The transmitter gain amplification module 11 is used to adjust the gain of the clock signal to obtain a single-ended clock amplification signal; The single-ended to differential balun circuit 12 is used to perform differential conversion on the single-ended clock amplification signal to obtain the differential clock.

[0052] In this embodiment, the gain adjustment of the clock signal by the transmitter gain amplification module 11 can compensate for the amplitude attenuation of the clock signal during transmission or pre-processing, so that the clock signal reaches the driving amplitude and level strength required by subsequent circuits, thereby improving the driving capability and anti-interference margin of the clock signal. The conversion of the single-ended clock amplification signal into a differential clock by the single-ended to differential balun circuit 12 can effectively suppress common-mode interference, reduce noise coupling on the transmission path, and improve the signal-to-noise ratio, stability and timing accuracy of the clock signal in high-speed and long-distance transmission scenarios.

[0053] like Figure 7 As shown, in some optional embodiments, the receiver circuit 4 includes a differential-to-single-ended balun circuit 41 electrically connected to the receiver fiber optic device 3, a receiver gain amplifier module 42 electrically connected to the differential-to-single-ended balun circuit 41, and a filter module 43 electrically connected to the receiver gain amplifier module 42. The differential-to-single-ended balun circuit 41 is used to convert the electrical signal into the single-channel clock. The receiver gain amplification module 42 is used to amplify the single-channel clock to obtain a single-channel amplified clock; The filtering module 43 is used to filter the single-channel amplified clock to obtain the clock signal.

[0054] In this embodiment, the differential clock is shaped and amplified by the transmitting optical fiber device 2 to compensate for transmission line loss; the transmitting optical module performs electro-optic conversion to generate a driving current with sufficient intensity and rate to drive the transmitting optical module to convert into an optical signal, reducing optical power loss and ensuring transmission efficiency; the optical fiber transmission can meet the clock synchronization of the magnetic resonance system, which can effectively improve the stability and quality of the magnetic resonance system clock and help improve the imaging quality of the magnetic resonance system.

[0055] Combination Figure 8 As shown, in some optional embodiments, the single-ended to differential balun circuit 12 includes a first resistor, a balun chip, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, and a diode array, wherein: The first differential signal output terminal of the balun chip is connected to the first input interface of the transmitting fiber optic device 2, the second differential signal output terminal of the balun chip is connected to the second input interface of the transmitting fiber optic device 2, and the ground terminal of the balun chip is grounded. One end of the first resistor is connected to the transmitter gain amplifier module 11, and the other end is connected to the single-ended signal input terminal of the balun chip. One end of the second resistor is connected to the first differential signal output terminal of the balun chip. One end of the third resistor is connected to the second differential signal output terminal of the balun chip, and the other end of the second resistor is connected to the other end of the third resistor. The first capacitor is connected to the first input interface of the transmitting fiber optic device 2, the second capacitor is connected to the second input interface of the transmitting fiber optic device 2, and one end of the third capacitor is connected between the second resistor and the third resistor, while the other end is grounded. The first and fourth connection terminals of the diode array are connected between the first differential signal output terminal of the balun chip and the first input interface of the transmitting fiber optic device 2, and the second and third connection terminals of the diode array are connected between the second differential signal output terminal of the balun chip and the second input interface of the transmitting fiber optic device 2.

[0056] The balun chip T1, model TC+1WG2+, is a passive balun responsible for converting single-ended signals to differential signals. Pin 4 (PRI) of the balun chip T1 is the single-ended signal input, receiving the amplified clock signal CLK2 after gain amplification. Pin 6 is analog ground (AGND). Pin 1 (SECDOT) is the first differential signal output, and pin 3 (SEC) is the second differential signal output. Pins 1 and 3 output two differential clocks with opposite phases.

[0057] The diode array U1, which can be selected as model HSMS-282R (dual series Schottky diode array), is mainly used as an ESD protection device in the SFP optical module of the downstream transmitter fiber optic device 2 to clamp and protect the differential signal. Pin 1 (first connection terminal) and pin 6 (fourth connection terminal) of the diode array U1 are connected between the first differential signal output terminal of the balun chip and the first input interface (SFP_TX_N differential negative signal line) of the transmitter fiber optic device 2; pin 3 (second connection terminal) and pin 4 (third connection terminal) are connected between the second differential signal output terminal of the balun chip and the second input interface (SFP_TX_P differential positive signal line) of the transmitter fiber optic device 2. When an ESD pulse exceeding the diode's forward voltage appears on SFP_TX_P or SFP_TX_N, the corresponding internal Schottky diode will quickly conduct, clamping the surge voltage within a safe range and discharging the energy to ground through pins 4 and 6, thereby protecting the downstream SFP optical module from electrostatic damage. At the same time, due to its extremely low junction capacitance, it has minimal impact on the integrity of high-speed differential signals.

[0058] In this circuit, the first resistor R1 is a series resistor at the input terminal, used for impedance matching and signal attenuation. The second resistor R2 and the third resistor R3 are the terminating resistors at the output terminal of the balun, forming a balanced network to ensure the symmetry of the differential output. The first capacitor C1 and the second capacitor C2 are DC blocking capacitors at the output terminal, isolating the DC component and coupling the high-frequency differential signal to the load. The third capacitor C3 is a decoupling capacitor at the output terminal of the balun, used to filter out high-frequency noise. Specifically, when the single-ended input signal CLK2 is input, it enters the single-ended signal input terminal (pin 4) of the balun chip T1 through the first resistor R1. The balun chip T1 internally converts the single-ended signal into a pair of differential signals with equal amplitude and a 180° phase difference through electromagnetic coupling, which are output from pins 1 and 3. The differential signal output by the balun chip T1 passes through the balanced network composed of resistors R2 and R3 to ensure the symmetry and impedance matching of the two signals. The third capacitor C3 filters out common-mode noise and high-frequency interference. The conditioned differential signal enters the diode array U1 to clamp and protect the differential signal, and is output to the first input interface and the second input interface of the back-end transmitter fiber optic device 2 through the first capacitor C1 and the second capacitor C2, that is, output to SFP_TX+ and SFP_TX-.

[0059] like Figure 9 As shown, in some optional embodiments, the differential-to-single-ended balun circuit 41 includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first non-magnetic wire-wound inductor, and a second non-magnetic wire-wound inductor, wherein: One end of the fourth resistor is connected to the first output interface and the second output interface of the receiving fiber optic device 3, respectively, and the other end of the fourth resistor is connected to the receiving gain amplification module 42. The fourth capacitor and the first non-magnetic wire-wound inductor are connected in series between the fourth resistor and the first output interface of the receiving fiber optic device 3. The fifth capacitor, the seventh resistor and the ninth capacitor are connected in series between the fourth resistor and the second output interface of the receiving fiber optic device 3. The fifth resistor is connected in series with the sixth resistor. One end of the fifth resistor is connected between the fourth capacitor and the first non-magnetic wire-wound inductor. One end of the sixth resistor is connected between the fifth capacitor and the seventh resistor. One end of the sixth capacitor is connected between the fifth resistor and the sixth resistor. The other end of the sixth capacitor is grounded. One end of the seventh capacitor is connected to one end of the first non-magnetic wire-wound inductor. The other end of the seventh capacitor is grounded. One end of the eighth capacitor is connected to the other end of the first non-magnetic wire-wound inductor. The other end of the eighth capacitor is grounded. One end of the second non-magnetic wire-wound inductor is connected between the seventh resistor and the ninth capacitor. The other end of the second non-magnetic wire-wound inductor is grounded.

[0060] In this embodiment, when the differential-to-single-ended balun circuit 41 is demagnetized, the differential-to-single-ended balun circuit 41 is used to convert the differential electrical signal (SFP_RX_P_1 / N_1) output by the SFP optical module into a single-ended signal and output it to the back-end gain amplification module. Because the receiver of the magnetic resonance imaging system is located next to the magnet in the shielded room, it is in a strong magnetic field environment. Therefore, the receiving end of the fiber optic clock needs to be demagnetized. Specifically, this may include selecting a magnetic resonance-specific non-magnetic chip, removing ferrite beads and magnetic inductors, designing a single-ended to differential balun circuit 12 with a non-magnetic wound inductor to replace the magnetic transformer, and designing a filter module 43 with a non-magnetic wound inductor and ceramic capacitors.

[0061] In some examples, when the differential-to-single-ended balun circuit 41 is demagnetized, the following resistors are used: the fourth resistor R4 is a reserved resistor and can be selected as 0R / 1%; the fifth resistor R5 and the sixth resistor R6 are terminating matching resistors and can be selected as 49.9R / 1% precision resistors. These are used to match the impedance of the differential transmission line output by the SFP module, reduce signal reflection, ensure signal integrity, and absorb reflected waves on the transmission line to prevent signal overshoot and ringing, thus improving the quality of high-speed signals. The seventh resistor R7 can be selected as a 0R / 1% resistor and is used as a debugging node. It can be replaced with a resistor of a specific value when necessary to fine-tune the balance of the differential signal or suppress common-mode noise.

[0062] The fourth capacitor, C4, and the fifth capacitor, C5, are input coupling capacitors. These can be 0.1µF / 25V ceramic capacitors used for DC blocking coupling, blocking the DC component in the differential input signal and allowing only the AC clock signal to pass through. They also isolate the DC bias between the SFP module and subsequent circuits, preventing circuit malfunctions caused by level mismatch. The sixth capacitor, C6, is a decoupling capacitor at the balun output, used to filter out high-frequency noise.

[0063] The seventh capacitor R7, the eighth capacitor R8, the ninth capacitor R9, the first inductor L1, and the second inductor L2 constitute an LC resonant network. The first inductor L1 and the second inductor L2 can be selected as 270nH / 2% power inductors; the seventh capacitor R7 is a DNP capacitor, and the eighth capacitor R8 and the ninth capacitor R9 can be selected as 33pF / 50V / 1% ceramic capacitors. This LC resonant network combines two differential signals with opposite phases into a single-ended signal, simultaneously achieving impedance transformation. Furthermore, the resonant network presents low impedance to signals of specific frequencies, allowing the target clock frequency to pass while suppressing out-of-band noise and interference. Moreover, the symmetrical LC structure effectively suppresses common-mode interference in the differential signal, improving the signal-to-noise ratio.

[0064] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the content disclosed in the above embodiments.

[0065] According to another aspect of the embodiments of this application, a computer program product or computer program is also provided, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of the clock transmission method of the magnetic resonance imaging system in any of the above embodiments.

[0066] According to another aspect of the embodiments of this application, this application also provides an electronic device, such as... Figure 10 As shown, the system includes a memory 1001, a processor 1003, and a network interface 1005. The memory 1001 stores a computer program that can run on the processor 1003. The memory 1001 and the processor 1003 communicate via the network interface 1005 and a communication bus 1007. When the electronic device is running, the processor 1003 and the memory 1001 communicate via the network interface 1005. When the processor 1003 executes the computer program, it implements the steps of the clock transmission method of the aforementioned magnetic resonance imaging system.

[0067] The memory and processor in the aforementioned electronic device communicate with each other via a communication bus and a communication interface. The communication bus can be a peripheral component interconnect standard (PCI) bus or an extended industry standard structure (EISA) bus, etc. This communication bus can be divided into an address bus, a data bus, a control bus, etc. The memory can include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory can also be at least one storage device located remotely from the aforementioned processor. The aforementioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0068] It is understood that the embodiments described herein can be implemented using hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits, digital signal processors, digital signal processing devices, microprocessors, and other electronic units or combinations thereof for performing the functions described herein. For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. Software code can be stored in memory and executed by a processor.

[0069] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, or a combination of computer software and electronic hardware. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0070] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or other forms.

[0071] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, the functional units in the various embodiments of this application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0072] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially, or the parts that contribute to the prior art, or parts of the technical solutions, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0073] It should be noted that, in this document, relational terms such as first, second, etc., are used only to distinguish one entity or operation from another entity or operation. The terms include, encompass, or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0074] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A clock transmission method for a magnetic resonance imaging system, characterized in that, The magnetic resonance imaging system includes a transmitter circuit, a transmitter fiber optic device, a receiver fiber optic device, and a receiver circuit connected in sequence. The method includes: The clock signal is converted through the transmitting circuit to obtain a differential clock; The differential clock is converted into an optical signal by the transmitting fiber optic device and sent to the receiving fiber optic device. The optical signal is converted into an electrical signal by the receiving fiber optic device and sent to the receiving circuit. The receiving circuit converts the electrical signal into a single-channel clock and filters it to obtain the clock signal.

2. The clock transmission method of the magnetic resonance imaging system according to claim 1, characterized in that, The step of converting the clock signal through the transmitting circuit to obtain a differential clock includes: The clock signal is amplified by adjusting the gain of the transmitter gain amplifier module in the transmitter circuit to obtain a single-ended clock amplification signal. The single-ended clock amplification signal is differentially converted by the single-ended to differential balun circuit in the transmitting circuit to obtain the differential clock.

3. The clock transmission method of the magnetic resonance imaging system according to claim 1, characterized in that, The step of converting the differential clock into an optical signal based on the transmitting fiber optic device and transmitting it to the receiving fiber optic device includes: The clock signal is extracted after the differential clock is shaped and amplified by the transmitter signal processing module in the transmitter fiber optic device. The extracted clock signal is converted into an optical signal by an electro-optical conversion using the transmitting optical module in the transmitting optical fiber device. The optical signal is transmitted to the receiving optical fiber device via optical fiber.

4. The clock transmission method of the magnetic resonance imaging system according to claim 1, characterized in that, The step of converting the electrical signal into a single-channel clock and filtering it based on the receiving end circuit to obtain the clock signal includes: The electrical signal is converted into a single clock signal by the differential-to-single-ended balun circuit in the receiving circuit. The single-channel clock is amplified by the receiver gain amplification module in the receiver circuit to obtain a single-channel amplified clock. The clock signal is obtained by filtering the single-channel amplified clock through the filtering module in the receiving circuit.

5. A magnetic resonance imaging system, applicable to the clock transmission method of the magnetic resonance imaging system according to any one of claims 1 to 4, characterized in that, The magnetic resonance imaging system includes a transmitter circuit, a transmitter fiber optic device electrically connected to the transmitter circuit, a receiver fiber optic device connected to the transmitter fiber optic device via an optical fiber, and a receiver circuit electrically connected to the receiver fiber optic device, wherein: The transmitting circuit is used to convert the clock signal to obtain a differential clock. The transmitting fiber optic device is used to convert the differential clock into an optical signal and send it to the receiving fiber optic device. The receiving fiber optic device is used to convert the optical signal into an electrical signal and send it to the receiving circuit. The receiving circuit is used to convert the electrical signal into a single-channel clock and filter it to obtain the clock signal.

6. The magnetic resonance imaging system according to claim 5, characterized in that, The transmitter circuit includes a transmitter gain amplification module and a single-ended to differential balun circuit electrically connected to the transmitter gain amplification module. The transmitter gain amplification module is used to adjust the gain of the clock signal to obtain a single-ended clock amplification signal; The single-ended to differential balun circuit is used to perform differential conversion on the single-ended clock amplification signal to obtain the differential clock.

7. The magnetic resonance imaging system according to claim 5, characterized in that, The receiving end circuit includes a differential-to-single-ended balun circuit electrically connected to the receiving end optical fiber device, a receiving end gain amplification module electrically connected to the differential-to-single-ended balun circuit, and a filtering module electrically connected to the receiving end gain amplification module. The differential-to-single-ended balun circuit is used to convert the electrical signal into the single-channel clock. The receiver gain amplification module is used to amplify the single-channel clock to obtain a single-channel amplified clock. The filtering module is used to filter the single-channel amplified clock to obtain the clock signal.

8. The magnetic resonance imaging system according to claim 6, characterized in that, The single-ended to differential balun circuit includes a first resistor, a balun chip, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor, and a diode array, wherein: The first differential signal output terminal of the balun chip is connected to the first input interface of the transmitting fiber optic device, the second differential signal output terminal of the balun chip is connected to the second input interface of the transmitting fiber optic device, and the ground terminal of the balun chip is grounded. One end of the first resistor is connected to the transmitter gain amplifier module, and the other end is connected to the single-ended signal input terminal of the balun chip. One end of the second resistor is connected to the first differential signal output terminal of the balun chip. One end of the third resistor is connected to the second differential signal output terminal of the balun chip, and the other end of the second resistor is connected to the other end of the third resistor. The first capacitor is connected to the first input interface of the transmitting fiber optic device, the second capacitor is connected to the second input interface of the transmitting fiber optic device, and one end of the third capacitor is connected between the second resistor and the third resistor, while the other end is grounded. The first and fourth connection terminals of the diode array are connected between the first differential signal output terminal of the balun chip and the first input interface of the transmitting fiber optic device, and the second and third connection terminals of the diode array are connected between the second differential signal output terminal of the balun chip and the second input interface of the transmitting fiber optic device.

9. The magnetic resonance imaging system according to claim 7, characterized in that, The differential-to-single-ended balun circuit includes a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first non-magnetic wire-wound inductor, and a second non-magnetic wire-wound inductor, wherein: One end of the fourth resistor is connected to the first output interface and the second output interface of the receiving fiber optic device, respectively. The other end of the fourth resistor is connected to the receiving gain amplification module. The fourth capacitor and the first non-magnetic wire-wound inductor are connected in series between the fourth resistor and the first output interface of the receiving fiber optic device. The fifth capacitor, the seventh resistor and the ninth capacitor are connected in series between the fourth resistor and the second output interface of the receiving fiber optic device. The fifth resistor is connected in series with the sixth resistor. One end of the fifth resistor is connected between the fourth capacitor and the first non-magnetic wire-wound inductor. One end of the sixth resistor is connected between the fifth capacitor and the seventh resistor. One end of the sixth capacitor is connected between the fifth resistor and the sixth resistor. The other end of the sixth capacitor is grounded. One end of the seventh capacitor is connected to one end of the first non-magnetic wire-wound inductor. The other end of the seventh capacitor is grounded. One end of the eighth capacitor is connected to the other end of the first non-magnetic wire-wound inductor. The other end of the eighth capacitor is grounded. One end of the second non-magnetic wire-wound inductor is connected between the seventh resistor and the ninth capacitor. The other end of the second non-magnetic wire-wound inductor is grounded.

10. An electronic device, comprising: A processor, a memory, and a network interface, wherein the memory stores machine-readable instructions executable by the processor, characterized in that: when the electronic device is running, the processor communicates with the memory via the network interface, and the processor executes the machine-readable instructions to perform the steps of the clock transmission method of the magnetic resonance imaging system as described in any one of claims 1 to 4.

Images