CN106950521B - Magnetic resonance spectrometer, scanning method thereof and radio frequency transmitting and receiving method - Google Patents
Magnetic resonance spectrometer, scanning method thereof and radio frequency transmitting and receiving method Download PDFInfo
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- CN106950521B CN106950521B CN201710117600.XA CN201710117600A CN106950521B CN 106950521 B CN106950521 B CN 106950521B CN 201710117600 A CN201710117600 A CN 201710117600A CN 106950521 B CN106950521 B CN 106950521B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
- G01R33/3692—Electrical details, e.g. matching or coupling of the coil to the receiver involving signal transmission without using electrically conductive connections, e.g. wireless communication or optical communication of the MR signal or an auxiliary signal other than the MR signal
Abstract
The invention provides a magnetic resonance spectrometer and a scanning method and a radio frequency transmitting and receiving method thereof, wherein the magnetic resonance spectrometer comprises a router, a computer unit and a hardware execution unit, the computer unit comprises a plurality of computer modules, the hardware execution unit comprises a plurality of hardware execution modules, the router is provided with a plurality of first optical ports, and the first optical ports are respectively connected with the computer modules or the hardware execution modules in a one-to-one corresponding optical fiber manner; the router receives the data packet sent by the computer module and forwards the data packet to the hardware execution unit or other computer modules, and the router receives the data packet sent by the hardware execution unit and forwards the data packet to the computer unit. According to the method, the computer unit and the hardware execution unit are connected through the router to form the optical fiber communication topological network, so that the system working efficiency of the magnetic resonance spectrometer is improved, the system reliability is improved, and the integral scanning speed is increased.
Description
Technical Field
The disclosure relates to the field of medical equipment, in particular to a magnetic resonance spectrometer, a scanning method thereof and a radio frequency transmitting and receiving method.
Background
Magnetic Resonance Imaging (MRI) is a method in which a subject is excited by a radio frequency system and a gradient system using a constant magnetic field generated by a magnet to generate a magnetic resonance signal, and the signal is acquired and reconstructed by a receiving system to obtain an image of the subject.
The magnetic resonance spectrometer is a device for realizing magnetic resonance imaging, and in the related art, the magnetic resonance spectrometer generally includes a control module, a computer unit connected with the control module and used for functions such as scanning, reconstruction and the like, and various hardware execution units, wherein the control module is electrically connected with the various hardware execution units through a control bus based on a back panel structure. In the magnetic resonance imaging process, the computer unit and various hardware execution units are communicated with each other through the control module.
With the development of magnetic resonance imaging, the communication requirement between a computer unit and a hardware execution unit is higher and higher, and when the existing control bus is adopted for communication, a control module can only access one hardware execution unit at a time, so that the communication efficiency is lower; and the scalability of the magnetic resonance spectrometer is limited due to the limited number of interfaces that the control bus can support.
Disclosure of Invention
In view of the above, the present disclosure provides a magnetic resonance spectrometer, a scanning method thereof, and a radio frequency transmitting and receiving method.
Specifically, the present disclosure is realized by the following technical solutions:
according to a first aspect of the embodiments of the present disclosure, a magnetic resonance spectrometer is provided, including a router, a computer unit, and a hardware execution unit, where the computer unit includes a plurality of computer modules, the hardware execution unit includes a plurality of hardware execution modules, the router is configured with a plurality of first optical ports, and the plurality of first optical ports are respectively connected with the computer modules or the hardware execution modules in a one-to-one optical fiber manner; the router receives the data packet sent by the computer module and forwards the data packet to the hardware execution unit or other computer modules, and the router receives the data packet sent by the hardware execution unit and forwards the data packet to the computer unit.
Preferably, the router further includes a first processor electrically connected to the plurality of first optical ports.
Preferably, the plurality of computer modules includes a scanning computer module, at least one sequence computer module, and at least one reconstruction computer module;
the scanning computer module is used for receiving scanning parameters input by a user, generating and sending a first data packet containing the scanning parameters to the router, and receiving a fourth data packet containing a reconstructed image, which is generated by the reconstruction computer module and forwarded by the router;
the sequence computer module is used for receiving a first data packet containing scanning parameters, analyzing the scanning parameters, performing sequence calculation, outputting hardware control parameters, generating and sending a second data packet containing the hardware control parameters to the router;
the reconstruction computer module is used for receiving a third data packet which is generated by the hardware execution unit and forwarded by the router and contains scanning data, reconstructing an image according to the scanning data and sending a fourth data packet containing a reconstructed image, wherein the scanning data is acquired by the hardware execution unit.
Preferably, the scanning computer module, the sequence computer module and the reconstruction computer module are each formed by a single computer component.
Preferably, the scanning computer module, the sequence computer module and the reconstruction computer module are integrated into a whole or any two of them are composed of the same computer component.
Preferably, a computer main body, a general interface, a second processor and a second optical port are arranged in the computer assembly, the general interface is connected with the computer main body, the second processor is respectively electrically connected with the general interface and the second optical port, and the second optical port is connected with the first optical port through an optical fiber; the second processor is used for protocol conversion between the second optical port and the general interface.
Preferably, the hardware execution module is provided with a third optical port, a third processor and a peripheral circuit, the third processor is electrically connected with the third optical port and the peripheral circuit respectively, and the third optical port is connected with the first optical port corresponding to the hardware execution unit through an optical fiber; and the third processor drives the peripheral circuit to execute corresponding operation according to the received control signal, acquires data and sends a third data packet containing scanning data.
Preferably, the hardware execution modules include at least one radio frequency transmission module, at least one radio frequency receiving module and at least one gradient module.
Preferably, the hardware execution modules further include one or more of a gated acquisition module, a magnet monitoring module, and a patient bed module.
Preferably, the router further includes a first clock submodule, and a second clock submodule is further disposed in the third processor, and the second clock submodule and the first clock submodule generate a coherent clock signal.
According to a second aspect of the embodiments of the present disclosure, there is provided a magnetic resonance scanning method based on the above magnetic resonance spectrometer, including the following steps:
the router forwards the data packet containing the control parameters from the computer unit to the hardware execution unit;
and the router receives a data packet containing scanning data of the hardware execution unit and forwards the data packet to the computer unit, wherein the scanning data is acquired by the hardware execution unit when executing the magnetic resonance scanning according to the control parameters.
Preferably, when the plurality of computer modules include a scanning computer module, a sequence computer module, and a reconstruction computer module, the router forwards the control signal from the computer unit to the hardware execution unit, specifically:
the router receives a first data packet from the scanning computer module and forwards the first data packet to the sequence computer module, wherein the first data packet comprises scanning parameters input by a user;
and the router receives a second data packet from the sequence computer module and forwards the second data packet to each hardware execution module, wherein the second data packet comprises hardware control parameters obtained by the sequence computer module through sequence calculation conversion according to the scanning parameters.
Preferably, when the plurality of computer modules include a scanning computer module, a sequence computer module, and a reconstruction computer module, the router receives the scanning data of the hardware execution unit and forwards the scanning data to the computer unit, specifically:
the router receives a third data packet from the hardware execution unit and forwards the third data packet to the reconstruction computer module, wherein the third data packet comprises scan data acquired by the hardware execution unit executing magnetic resonance scanning according to the hardware control parameters;
and the router receives a fourth data packet from the reconstruction computer module and forwards the fourth data packet to the scanning computer module, wherein the fourth data packet comprises a reconstructed image obtained by the reconstruction computer module through image reconstruction according to the scanning data.
Preferably, the arrival time of the second packet at each hardware execution module in the hardware execution unit is the same.
According to a third aspect of the embodiments of the present disclosure, a radio frequency transmitting and receiving method based on the magnetic resonance spectrometer is provided, which includes the following steps: the router receives the data packet from the radio frequency transmitting module and forwards the data packet to the radio frequency receiving module.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the computer unit and the hardware execution unit are connected through the router to form a topological network for optical fiber communication, so that the system working efficiency of the magnetic resonance spectrometer is improved, the system reliability is improved, and the integral scanning speed is increased.
Drawings
FIG. 1 is a block diagram of one configuration of a magnetic resonance spectrometer of the present disclosure;
FIG. 2 is a block diagram of an example of an application of the disclosed magnetic resonance spectrometer;
FIG. 3 is a block diagram of one configuration of computer components in the magnetic resonance spectrometer of the present disclosure;
FIG. 4 is a block diagram of a hardware implementation of the magnetic resonance spectrometer of the present disclosure;
FIG. 5 is a schematic representation of a data packet format employed by the magnetic resonance spectrometer of the present disclosure;
FIG. 6 is a schematic illustration of a portion of hardware control parameters in a second data packet employed by the magnetic resonance spectrometer of the present disclosure;
FIG. 7 is a schematic illustration of data synchronization during a magnetic resonance spectrometer scan according to the present disclosure;
FIG. 8 is a data packet distribution schematic of a start scan command during a magnetic resonance spectrometer scan of the present disclosure;
figure 9 is a flow chart of a magnetic resonance scanning method of the present disclosure;
figure 10 is another flow chart of a magnetic resonance scanning method of the present disclosure.
In the figure, 1-computer unit, 2-router, 3-hardware execution unit, 10-computer module, 11-scanning computer module, 12-sequence computer module, 13-reconstruction computer module, 21-first processor, 22-first optical port, 23-clock source first clock submodule, 24-power supply submodule, 25-, 30-hardware execution module, 31-radio frequency emission module, 32-gradient module, 33-radio frequency reception module, 34-gated acquisition module 34, 35-magnet monitoring module, 36-hospital bed module, 37-other module, 100-computer component, 101-computer main body, 102-general interface, 103-second processor, 104-second optical port, 205-start packet transmission submodule, 301-third optical port, 302-third processor, 303-peripheral circuit, 311-synchronization submodule.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, a first optical port may also be referred to as a second optical port, and similarly, a second optical port may also be referred to as a first optical port, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
As shown in fig. 1, the magnetic resonance spectrometer includes a router 2, a computer unit 1 and a hardware execution unit 3, the computer unit 1 includes a plurality of computer modules 10, the hardware execution unit 3 includes a plurality of hardware execution modules 30, the router 2 is configured with a plurality of first optical ports 22, and the first optical ports 22 are respectively connected with the computer modules 10 or the hardware execution modules 30 through optical fibers corresponding to one another; the router 2 receives the data packet sent by the computer module 10 and forwards the data packet to the hardware execution unit 3 or other computer modules 10, and the router 2 receives the data packet sent by the hardware execution unit 3 and forwards the data packet to the computer unit 1.
In practical application, the computer unit 1 may be located in an operation room, the hardware execution unit 3 may be located in an equipment room, and the router 2 may be integrally installed on a cabinet of the magnetic resonance spectrometer.
The router 2 is an optical fiber router, and further includes a first processor 21 electrically connected to the first optical port 22, a first clock submodule 23 for serving as a clock source for operating the magnetic resonance spectrometer, and a power supply submodule 24 for supplying power to internal modules of the router 2. In one embodiment, the first processor 21 may be an FPGA.
The router 2 is provided with a plurality of first optical ports 22 to form a distributed topology structure, so that the expansibility and the adaptability are stronger, a plurality of functional modules are connected through optical fibers to realize mutual cooperative work, the execution operation efficiency is improved, the flexibility of the magnetic resonance spectrometer during configuration can be improved, and the integral scanning efficiency is improved.
As shown in fig. 2, the hardware executing unit 3 may include a plurality of hardware executing modules 30, such as a radio frequency transmitting module 31, a gradient module 32, and a radio frequency receiving module 33. In addition, one or more of a plurality of common modules of the magnetic resonance apparatus, such as a gated acquisition module 34, a magnet monitoring module 35, a patient bed module 36, and other modules 37, may also be used as the hardware implementation module 30.
The radio frequency transmitting module 31 is used for driving the radio frequency coil to output radio frequency pulses meeting requirements, and may be a transmitting controller and a radio frequency power amplifier, or an integrated digital interface radio frequency power amplifier; the gradient module 32 is used for driving gradient coils in three directions to provide gradient magnetic fields, and can be a gradient power amplifier; the radio frequency receiving module 33 is used for controlling the receiving coil to enter a tuning state and collecting signals received by the receiving coil; the gated acquisition module 34 is used for gated imaging, acquisition and monitoring of physiological signals; the magnet monitoring module 35 is used for monitoring the magnetic field condition of the magnet; the bed module 36 is used for examination and positioning of a bed; other modules 37 may be communicators, video monitors, helium and water cooling, oxygen detectors, etc.
The above may be used as a built-in module of the hardware execution unit 3, and the number of each hardware execution module 30 may be set according to actual requirements. In fig. 2, two rf transmitting modules 31, two gradient modules 32 and four rf receiving modules 32 are exemplarily disposed, which are respectively in optical fiber connection with the first optical port 22, and this design can improve the rf transmitting strength, the gradient control efficiency and the rf receiving effect; in addition, there is one gated acquisition module 34, one magnet monitoring module 35, one patient bed module 36, and one other module 37.
As shown in fig. 4, the hardware executing module 30 may have an internal structure with a third optical port 301, a third processor 302 and a peripheral circuit 303. The third processor 302 is electrically connected to the third optical port 301 and the peripheral circuit 303, respectively, and the third optical port 301 is connected to the first optical port 22 corresponding to the hardware execution unit 3 through an optical fiber. The third processor 302 processes the data packet received by the third optical port 301 and sent by another module, and sends the processed data packet to the peripheral circuit 303; during the scanning process, the third processor 302 acquires the scanning data or working data of the peripheral circuit 303, packages the scanning data or working data, and sends the data to the computer unit 1 or other hardware execution units 3 through the third optical port 301 to implement external communication. The above structure separates the photoelectric conversion part from the peripheral circuit 303, and thus can be compatible with different types of hardware execution modules 30, and has good adaptability.
The third processor 302 may be an FPGA, and the peripheral circuit 303 includes a plurality of module circuits such as an analog-to-digital mixing module (an analog-to-digital converter and a digital-to-analog converter), an analog signal module (an amplifier, signal conditioning), and a digital IO (control high-low level); the third processor 302 is also provided with a second clock sub-module for generating a coherent clock signal by an external clock module, so as to ensure time synchronization of each hardware execution unit 3 and the magnetic resonance spectrometer and ensure the effect of magnetic resonance scanning. The third processor 302 is provided with a Register (Reg for short) as an internal storage unit related to the sequence; the third processor 302 is further provided with a synchronization submodule 311 for sequence synchronization, and the synchronization submodule 311 may be physical hardware or software disposed on the third processor 302.
In practical use, after receiving the data packet sent by the computer unit 1, the hardware execution unit 3 executes magnetic resonance scanning according to the hardware control parameters contained in the data packet, acquires the scanning data, generates the data packet containing the scanning data, and forwards the data packet to the router 2.
As shown in fig. 2, the computer unit 1 may comprise, inter alia, a scanning computer module 11, at least one sequence computer module 12 and at least one reconstruction computer module 13. The cooperation between the scanning computer module 11, the sequence computer module 12, the reconstruction computer module 13 and the hardware execution module 30 is as follows.
The scanning computer module 11 receives the scanning parameters input by the user, generates and sends a first data packet containing the scanning parameters to the router 2; a fourth data packet containing the reconstructed image, generated by the reconstruction computer module 13 and forwarded by the router 2, is also received. The first data packet may contain a scan start command, where the scan command contains scan parameters, and the scan parameters mainly describe physical gradient waveforms and radio frequency waveforms that the sequence needs to generate in time sequence, and physical information such as signal acquisition bandwidth and gain.
The sequence computer module 12 receives a first data packet containing scanning parameters, analyzes the scanning parameters, converts the scanning parameters into hardware control parameters according to a time sequence, generates and sends a second data packet containing a scanning start command and the hardware control parameters to the router 2. The second packet is forwarded via router 2 to the corresponding hardware execution module 30.
The analyzing of the scanning parameters and the converting into hardware control parameters according to the time sequence by the sequence computer module 12 are specifically as follows: the sequence computer module 12 expands according to the scanning parameters in time sequence, and sequentially converts to obtain a plurality of groups of hardware control parameters driving corresponding hardware execution modules in time sequence.
Taking radio frequency transmission as an example, the scanning parameters define radio frequency transmission start time, a radio frequency transmission cycle, radio frequency transmission times, a radio frequency transmission waveform parameter table, and the like, and the sequence computer module 12 generates one or more radio frequency transmission sequences on a time axis according to the radio frequency transmission cycle and the radio frequency transmission times, and converts the sequences to obtain hardware control parameters to be executed by the radio frequency transmission module 31 according to the time sequence.
The time error of the second data packet containing the start scanning command and the hardware control parameter arriving at each hardware execution module 30 needs to be small to ensure the synchronization of the timing sequence among the hardware execution modules 30, and the sequence synchronization is mainly realized by the sequence computer module 12, the router 2 and the synchronization submodule 311 in the third processor 302, which will be described in detail in the following description of the data packet.
The hardware execution module 30 receives the second data packet containing the hardware control parameter, analyzes the hardware control parameter, executes corresponding operations such as scanning, collects scanning data, and generates and sends a third data packet containing the scanning data to the router 2. The radio frequency receiving module 33 collects the scan data, generates and sends a third data packet containing the scan data to the router 2.
The reconstruction computer module 13 receives a third data packet containing scan data, performs image reconstruction according to the scan data, and sends a fourth data packet containing a reconstructed image, where the scan data is acquired by the hardware execution unit 3.
The DATA packets transmitted during the communication between the computer unit 1 and the hardware executing unit 3, including the first DATA packet, the second DATA packet, the third DATA packet and the fourth DATA packet, may all adopt the format of the DATA packet as shown in fig. 5, and the DATA packet includes a Destination address (Destination ID), a Source address (Source ID), a DATA type (message type), a DATA length (L ength) and a DATA content (DATA).
In an optional implementation manner, the DATA packet may be designed to include a 32-bit packet header and specific information, where the specific information is DATA content (DATA), where the 32-bit DATA of the packet header sequentially includes an 8-bit Destination address (Destination ID) indicating where to send DATA, an 8-bit Source address (Source ID) indicating where the DATA comes from, a 4-bit DATA type (Message type) that can implement operations such as reading and writing module registers according to a DATA packet type defined as needed, and a 12-bit DATA length (L ength) representing the length of the DATA packet, where the maximum length of the DATA packet may be 4096.
The transmission of the data packet supports the form of broadcasting, for example, when the computer unit 1 needs to write the same control parameter into different hardware execution modules 30, the transmission in the form of broadcasting only needs to be performed once, thereby greatly increasing the hardware access efficiency.
The second data packet is sent to the hardware execution modules 30 to achieve sequence synchronization, which may adopt a method of recovering a clock, or may adopt a cable form to transmit a clock signal and a data packet.
The hardware control parameters included in the second DATA packet are obtained by the sequence computer module 12 by performing sequence calculation according to the scan parameters obtained by the scan computer 11, and include ADDR (address), DATA (DATA), and DUR (duration). Where ADDR points to a register in the third processor 302 in the corresponding hardware execution unit 3, DATA is the value to be written to the register, and DUR is the valid time of the written value. A set of ADDR, DATA, and DUR is referred to as an event, and multiple events constitute a scan sequence.
Taking the control of the rf transmission amplitude as an example, the corresponding hardware control parameter for driving the rf transmission module in the second data packet is shown in fig. 6. Where ADDR _ RF _ AMP is an address for amplitude control, DATA _ RF _ AMP 1, DATA _ RF _ AMP2, and DATA _ RF _ AMP 3 respectively indicate three amplitude magnitudes to be written in sequence, DUR 1, DUR 2, and DUR 3 respectively indicate the duration of the three amplitudes, and three sets of DATA constitute three events. The rf transmitting module 31 can update the three times of rf transmitting amplitude according to the hardware control parameter.
In an alternative embodiment, a first clock submodule 23 is provided in the router 2, and a second clock submodule is provided in the third processor 302, and the second clock submodule and the first clock submodule can generate coherent clock signals.
In a specific implementation process, the second clock sub-module of each hardware execution module 30 extracts a clock signal coherent with the first clock sub-module 23 in the router 2 according to the phase information in the optical fiber signal transmitted by the router 2, and the extracted clock signal is a recovered clock. As shown in fig. 7, under the trigger of recovering the clock and starting the scan command, the synchronization sub-module 311 parses each event, writes DATA in the event into a corresponding register, clocks a corresponding DUR, and controls the peripheral circuit 303. By this mechanism of events, the timing of the execution of the control commands by the respective hardware execution modules 30 can be precisely controlled.
In an example, the communication rates of the hardware execution module 30 and the router 2 that need to be synchronized are set to 2Gbps, and the start packet sending submodule 205 is provided in the first processor 21. The start packet sending submodule 205 may be a physical hardware or a software disposed on the first processor 21. As shown in fig. 8, when a second data packet containing a start scanning command and hardware control parameters arrives at the first processor 21, the first processor 21 will occupy the internal data path of the router 2 with the highest priority through the start data packet sending sub-module 205, and broadcast the second data packet at the same time when the sending of the normal data transmission queue is suspended. The hardware execution module 30 also parses the second packet with the highest priority, which ensures that the trigger time of the start scan command at each hardware execution module 30 is substantially the same.
In practical applications, the functions of scanning, sequence synchronization, reconstruction, and the like may be implemented by one computer, or may be implemented by two or more computers, or each function may be implemented by a plurality of computers. Fig. 2 shows an exemplary scanning computer module 11, which is composed of one computer, a sequence computer module 12, which is composed of two computers, and a reconstruction computer module 13, which is composed of two computers. The arrangement of the sequence computer module 12 formed by two or even more computers can improve the efficiency of sequence synchronization, thereby greatly improving the system performance; two or more computers form the reconstruction computer module 13, which can support the parallel image reconstruction and accelerate the speed of reconstructing the magnetic resonance image.
In an alternative implementation, the scanning computer module 11, the sequence computer module 12, and the reconstruction computer module 13 may each be formed by a single computer assembly 100.
In another alternative implementation, the scanning computer module 11, the sequence computer module 12, and the reconstruction computer module 13, or any two of them, are integrated and formed by the same computer component 100, and the rest of the modules may be independent computer components 100.
As shown in fig. 3, a computer main body 101, a general interface 102, a second processor 103 and a second optical port 104 are disposed in the computer assembly 100, the general interface 102 is connected to the computer main body 101, the second processor 103 is electrically connected to the general interface 102 and the second optical port 104, respectively, and the second optical port 104 is connected to the first optical port 22 through an optical fiber; the second processor 103 is configured to convert a protocol between the second optical port 104 and the universal interface 102, for example, the second processor 103 may be an FPGA, the universal interface 102 may be a PCIE interface, and the second processor 103 is responsible for converting between the PCIE interface and an optical fiber protocol.
The universal interface 102, the second processor 103 and the second optical port 104 may be integrated on an expansion card, and connected to the computer main body 101 through a card slot, so as to facilitate maintenance and replacement.
In the above implementation manner, the scanning computer module 11, the sequence computer module 12, and the reconstruction computer module 13 all adopt the architecture of the computer component 100, so that the compatibility is improved, and the upgrade cost of the magnetic resonance spectrometer can be reduced.
In the embodiment of the present disclosure, the first optical port 22 may be divided into a plurality of high-speed optical ports and a plurality of low-speed optical ports according to different supported bandwidths, and each of the ports may be connected to devices with different speed requirements. The high-speed optical port, such as 211-226 in fig. 2, is used to connect to modules requiring high speed, such as the scanning computer module 11, the sequence computer module 12, the reconstruction computer module 13 in the computer unit 1, and the rf transmitting module 31, the gradient module 32, and the rf receiving module 33 in the hardware executing unit 3; the low-speed optical port, such as 231 and 246 in fig. 2, is used to connect modules that require low speed to meet the requirement, such as the gated acquisition module 34, the magnet monitoring module 35, the patient bed module 36 and other modules 37 in the hardware execution unit 3.
In another aspect of the embodiment of the present invention, a scanning method based on the above-mentioned magnetic resonance spectrometer is further provided, as shown in fig. 9, including the following steps:
When the plurality of computer modules 10 include the scanning computer module 11, the sequence computer module 12, and the reconstruction computer module 13, as shown in fig. 10, the step 51 may specifically be:
in step 512, the router 2 receives a second data packet from the sequence computer module 12, and forwards the second data packet to the hardware executing unit 3, where the second data packet includes the hardware control parameter obtained by converting the scan parameter by the sequence computer module 12.
Further, step 52 may specifically be:
521, the router 2 receives a third data packet from the hardware execution unit 3, and forwards the third data packet to the reconstruction computer module 13, where the third data packet includes scan data acquired by the hardware execution unit 3 executing magnetic resonance scanning according to the hardware control parameter;
in step 522, the router 2 receives a fourth data packet from the reconstruction computer module 13 and forwards the fourth data packet to the scanning computer module 11, where the fourth data packet includes a reconstructed image obtained by the reconstruction computer module 13 through image reconstruction according to the scanning data.
Specifically, in step 521, each hardware execution module 30 of the hardware execution unit 3 executes a magnetic resonance scan according to the hardware control parameter, and the receiving module 33 acquires scan data to generate a third data packet, and forwards the third data packet through the router 2.
For sequence synchronization, the time when the second packet arrives at each hardware execution module 30 of the hardware execution unit 3 is the same, and the synchronization of the timing sequence between each hardware execution module 30 is ensured.
The implementation process of the corresponding steps in the method is specifically detailed in the implementation process of the functions and actions of each part of the computer unit 1, the router 2 and the hardware execution unit 3 in the magnetic resonance spectrometer, and will not be elaborated here.
In another aspect of the embodiments of the present invention, a radio frequency transmitting and receiving method based on the above magnetic resonance spectrometer is further provided, which includes the following steps:
the router 2 receives the data packet from the rf transmitting module 31 and forwards the data packet to the rf receiving module 33.
In an alternative embodiment, the rf transmitting module 31 sends the data packet containing the status information before transmission to the rf receiving module 33 through the router 2 before transmitting the rf; after receiving the data packet containing the pre-transmission state information, the radio frequency receiving module 33 controls the receiving coil to be in the detuned state, and sends the data packet containing the detuned state information to the radio frequency transmitting module 31 through the router 2; when the radio frequency transmitting module 31 receives the data packet containing the detuning state information, the radio frequency transmitting module transmits the radio frequency; after the rf transmitting module 31 transmits the rf, the router 2 sends the data packet containing the transmitted status information to the rf receiving module 33. After receiving the data packet containing the transmitted state information, the radio frequency receiving module 33 controls the receiving coil to enter a tuning state to prepare for receiving a scanning signal.
In the design, the radio frequency transmitting module 31 can confirm the state of the radio frequency receiving module 33 through the data packet forwarded by the router 2, and an additional communication interface is not needed, so that the network structure is simplified while the data transmission efficiency is improved.
The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (11)
1. A magnetic resonance spectrometer is characterized by comprising a router, a computer unit and a hardware execution unit, wherein the computer unit comprises a plurality of computer modules, the hardware execution unit comprises a plurality of hardware execution modules, the router is provided with a plurality of first optical ports, and the first optical ports are respectively connected with the computer modules or the hardware execution modules through optical fibers in a one-to-one correspondence manner;
the router receives the data packet sent by the computer module and forwards the data packet to the hardware execution unit or other computer modules, and the router receives the data packet sent by the hardware execution unit and forwards the data packet to the computer unit;
the hardware execution modules comprise at least one radio frequency transmission module, at least one radio frequency receiving module and at least one gradient module; the plurality of computer modules includes a scanning computer module, at least one sequence computer module, and at least one reconstruction computer module.
2. The magnetic resonance spectrometer of claim 1, wherein the router further comprises a first processor electrically connected to the first plurality of optical ports.
3. The magnetic resonance spectrometer of claim 1,
the scanning computer module is used for receiving scanning parameters input by a user, generating and sending a first data packet containing the scanning parameters to the router, and receiving a fourth data packet containing a reconstructed image, which is generated by the reconstruction computer module and forwarded by the router;
the sequence computer module is used for receiving a first data packet containing scanning parameters, analyzing the scanning parameters, performing sequence calculation, outputting hardware control parameters, generating and sending a second data packet containing the hardware control parameters to the router;
the reconstruction computer module is used for receiving a third data packet which is generated by the hardware execution unit and forwarded by the router and contains scanning data, reconstructing an image according to the scanning data and sending a fourth data packet containing a reconstructed image, wherein the scanning data is acquired by the hardware execution unit.
4. The magnetic resonance spectrometer according to claim 3, wherein the hardware execution module is provided with a third optical port, a third processor and a peripheral circuit, the third processor is electrically connected to the third optical port and the peripheral circuit, respectively, and the third optical port is connected to the first optical port corresponding to the hardware execution unit through an optical fiber; and the third processor drives the peripheral circuit to execute corresponding operation according to the received second data packet, acquires data and sends a third data packet containing scanning data.
5. The magnetic resonance spectrometer of claim 1, wherein the number of hardware execution modules further comprises one or more of a gated acquisition module, a magnet monitoring module, a patient bed module.
6. The magnetic resonance spectrometer of claim 4, wherein the router further comprises a first clock sub-module, and wherein a second clock sub-module is further disposed within the third processor, the second clock sub-module generating a coherent clock signal with the first clock sub-module.
7. A magnetic resonance scanning method based on the magnetic resonance spectrometer of any one of claims 1 to 6, characterized by comprising the following steps:
the router forwards the data packet containing the hardware control parameter from the computer unit to the hardware execution unit;
and the router receives a data packet containing scanning data of the hardware execution unit and forwards the data packet to the computer unit, wherein the scanning data is acquired by the hardware execution unit when executing the magnetic resonance scanning according to the hardware control parameter.
8. The magnetic resonance scanning method of claim 7, wherein when the plurality of computer modules include a scanning computer module, a sequence computer module and a reconstruction computer module, the router forwards the control signal from the computer unit to the hardware execution unit, specifically:
the router receives a first data packet from the scanning computer module and forwards the first data packet to the sequence computer module, wherein the first data packet comprises scanning parameters input by a user;
and the router receives a second data packet from the sequence computer module and forwards the second data packet to each hardware execution module, wherein the second data packet comprises hardware control parameters obtained by the sequence computer module through sequence calculation conversion according to the scanning parameters.
9. The magnetic resonance scanning method of claim 7, wherein when the plurality of computer modules includes a scanning computer module, a sequence computer module, and a reconstruction computer module,
the router receives the scan data of the hardware execution unit and forwards the scan data to the computer unit, and the method specifically comprises the following steps:
the router receives a third data packet from the hardware execution unit and forwards the third data packet to the reconstruction computer module, wherein the third data packet comprises scan data acquired by the hardware execution unit executing magnetic resonance scanning according to the hardware control parameters;
and the router receives a fourth data packet from the reconstruction computer module and forwards the fourth data packet to the scanning computer module, wherein the fourth data packet comprises a reconstructed image obtained by the reconstruction computer module through image reconstruction according to the scanning data.
10. A method as claimed in claim 8, wherein the second data packets arrive at the respective hardware execution blocks at the same time.
11. A method for transmitting and receiving radio frequency signals based on the magnetic resonance spectrometer of claim 1, comprising the steps of: the router receives the data packet from the radio frequency transmitting module and forwards the data packet to the radio frequency receiving module.
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