CN109712696B - Data processing method, device, equipment and storage medium - Google Patents
Data processing method, device, equipment and storage medium Download PDFInfo
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- CN109712696B CN109712696B CN201811616192.3A CN201811616192A CN109712696B CN 109712696 B CN109712696 B CN 109712696B CN 201811616192 A CN201811616192 A CN 201811616192A CN 109712696 B CN109712696 B CN 109712696B
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Abstract
The embodiment of the invention discloses a data processing method, a device, equipment and a storage medium, wherein the method comprises the steps of starting a radio frequency switch matrix based on a data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil when the data acquisition instruction is received, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part; converting the analog signal into a digital signal based on at least one preset front-end signal processing board card; the digital signal is acquired based on a digital acquisition board preset in a digital acquisition control board, the digital signal is processed by a preset processing method to obtain target data, and the target data is sent to an imaging reconstruction computer. The technical scheme of the embodiment of the invention solves the technical problems of poor channel resource allocation and higher cost in the prior art, improves the data processing efficiency, the channel resource allocation rate and the data acquisition accuracy, and simultaneously reduces the wiring complexity and the cost.
Description
Technical Field
The embodiment of the invention relates to the technical field of medical treatment, in particular to a data processing method, a device, equipment and a storage medium.
Background
Magnetic resonance imaging (MRI, magnetic Resonance Imaging) has an important role in the field of magnetic resonance, such as magnetic resonance imaging, and has become one of the main tools for medical clinical diagnosis and basic scientific research.
With the progress of superconducting technology, electronic technology, imaging technology, image processing technology and computer science technology, the application field of magnetic resonance imaging is expanding, and higher requirements are also put on the magnetic resonance system. In the prior art, nuclear magnetic resonance equipment generally adopts a cable to transmit an analog signal released by a human body to an imaging and reconstruction computer in the equipment room, and when the cable is long, the obtained data is inaccurate due to attenuation of the signal, and further the obtained image corresponding to a scanning position is also inaccurate. Further, if the number of cables is increased when the number of channels is increased while the channels are extended when the data of multiple channels are required to be acquired, if the number of the extended channels is large, the number of cables for transmitting the signals of the channels is increased, wiring is complicated, equipment cost is increased, and the technical problem of data acquisition accuracy is solved.
Disclosure of Invention
The embodiment of the invention provides a data processing method, a device, equipment and a storage medium, which are used for realizing the technical effects of improving the data processing efficiency and the channel configurability and reducing the cost.
In a first aspect, an embodiment of the present invention provides a data processing method, including:
when a data acquisition instruction is received, starting a radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part;
converting the analog signal into a digital signal based on at least one preset front-end signal processing board card;
acquiring the digital signal based on a digital acquisition board preset in a digital acquisition control board, processing the digital signal by adopting a preset processing method to obtain target data, and sending the target data to an imaging reconstruction computer so as to obtain a scanning image corresponding to the scanning part according to the target data;
the front-end signal processing board card and the digital acquisition control board are arranged in the scanning room; the digital acquisition board is inserted into the digital acquisition control board; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels.
In a second aspect, an embodiment of the present invention further provides a data processing apparatus, including:
the data acquisition control module is used for starting the radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to the radio frequency receiving coil when the data acquisition instruction is received, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part;
the analog-to-digital conversion module is used for converting the analog signals into digital signals based on at least one preset front-end signal processing board card;
the data processing module is used for acquiring the digital signals based on a digital acquisition board card preset in a digital acquisition control board, processing the digital signals by adopting a preset processing method to obtain target data, and sending the target data to an imaging reconstruction computer so as to obtain a scanning image corresponding to the scanning position according to the target data;
the front-end signal processing board card and the digital acquisition control board are arranged in the scanning room; the digital acquisition board is inserted into the digital acquisition control board; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels.
In a third aspect, an embodiment of the present invention further provides an apparatus, including:
one or more processors;
storage means for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the data processing method according to any of the embodiments of the present invention.
In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions which, when executed by a computer processor, are used to perform a data processing method according to any of the embodiments of the present invention.
According to the technical scheme, when a data acquisition instruction is received, a radio frequency switch matrix is started based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part, the analog signal is converted into a digital signal based on at least one preset front-end signal processing board card, the digital signal is acquired based on a digital acquisition board card preset in a digital acquisition control board, a preset processing method is adopted to process the digital signal to obtain target data, the target data is sent to an imaging reconstruction computer, so that a scanning image corresponding to the scanning part is obtained according to the target data, and the front-end signal processing board card and the digital acquisition control board are arranged in a scanning room; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels, so that the technical problems that in the prior art, analog signals are transmitted through cables, when the length of the cables is long, the generated signals are attenuated, the acquired data inaccurately reduce the accuracy of acquired data are solved, and if the data of the channels are required to be acquired, the number of the cables required for transmitting the signals is increased when the channels are required to be expanded, the complexity of cable wiring is improved, the technical problem of equipment cost is also improved, the data of the channels can be processed without using the cables, the data processing efficiency, the configurability of the acquisition channels and the accuracy of the data acquisition are improved, and meanwhile, the complexity of wiring and the technical effect of cost are reduced.
Drawings
In order to more clearly illustrate the technical solution of the exemplary embodiments of the present invention, a brief description is given below of the drawings required for describing the embodiments. It is obvious that the drawings presented are only drawings of some of the embodiments of the invention to be described, and not all the drawings, and that other drawings can be made according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a data processing method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a structure corresponding to the data processing method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a data collection and storage process according to a second embodiment of the present invention;
FIG. 4 is a flowchart of uploading target data to reconstruction computation according to a fourth embodiment of the present invention;
fig. 5 is a schematic diagram of a process of collecting digital signals according to a fourth embodiment of the present invention;
FIG. 6 is a schematic diagram of a data processing apparatus according to a fifth embodiment of the present invention;
fig. 7 is a schematic diagram of an apparatus structure according to a sixth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Examples
Fig. 1 is a schematic flow chart of a data processing method according to an embodiment of the present invention, where the method may be performed by a data processing device, and the device may be implemented in software and/or hardware.
As shown in fig. 2, in the technical solution of the embodiment of the present invention, the digital acquisition control board and the front-end signal processing board card are disposed in the scan room, that is, the analog-to-digital conversion module and the digital signal processing module may be disposed in the scan room, for processing the analog signal received by the radio frequency receiving coil. The magnetic resonance imaging and reconstruction computer can be simply called as reconstruction computer, and the reconstruction computer is arranged in the equipment room. The reconstruction computer and the digital acquisition control board are communicated with each other.
Referring to fig. 2, a radio frequency receiving coil, a radio frequency switch matrix, a front end signal processing board card and a digital acquisition control board may be disposed in the scan room. The radio frequency receiving coil is used for receiving an analog signal corresponding to the scanning part; a radio frequency switch matrix is understood to mean a number of switches, different switches selecting different channels. That is, according to the state of each switch in the radio frequency matrix, it can be determined which channel the radio frequency receiving coil is connected with, that is, according to which switch in the radio frequency switch matrix is in the closed state, it can be determined the data transmission channel corresponding to the radio frequency receiving coil; the front-end signal processing board card is used for converting the analog signals received by the radio frequency receiving coil into digital signals, wherein the front-end signal processing board card is of a plug-in structure, and the number and types of the front-end signal processing board card can be set according to actual requirements. The digital acquisition control board is provided with at least one slot for plugging at least one digital acquisition board card, and the digital acquisition board card is used for acquiring data of each channel. The single digital acquisition board card can support 96-channel data acquisition, and a worker can determine the number of the digital acquisition boards inserted on the data acquisition control board according to actual requirements. The programmable gate array arranged on the digital acquisition control board can determine at least one time stamp for executing the acquisition instruction, process the digital signals acquired by the acquisition channels and send the target data obtained by final processing to reconstruction calculation. The reconstruction computer is arranged in the equipment room, when a worker triggers an operation instruction on the reconstruction computer, the operation instruction can be sent to the digital acquisition control board, so that the nuclear magnetic resonance system executes operation corresponding to the operation instruction, and meanwhile, in the specific application process, the reconstruction computer can also receive processed target data sent by the digital acquisition control board.
As shown in fig. 1, the method of this embodiment includes:
and S110, when a data acquisition instruction is received, starting a radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part.
The data acquisition instruction may include time when each switch in the radio frequency switch matrix changes from an open state to a closed state, which switch is to be in the closed state, time information of data acquisition of each acquisition channel, and the like. The data acquisition instructions may be: when a worker triggers a data acquisition instruction, the host analyzes the data acquisition instruction, and the reconstruction computer sends the analyzed data acquisition instruction to the digital acquisition control board so that a programmable gate array on the digital acquisition control board executes corresponding operation according to the digital acquisition instruction. The radio frequency receiving coil is arranged at the part to be scanned and is used for receiving the analog signals corresponding to the part to be scanned. When the digital acquisition control board receives the data acquisition instruction, a channel communicated with the radio frequency receiving coil can be determined, that is, according to the received data acquisition instruction, which switch in the radio frequency switch matrix should be in a closed state at which time point can be determined, so that the channel corresponding to the radio frequency receiving coil is gated.
In order to ensure communication between the reconstruction computer and the digital acquisition control board, a communication protocol between the reconstruction computer and the data acquisition instruction is also established before the reconstruction computer transmits the data acquisition instruction to the digital acquisition control board, the communication protocol being used to transmit the data acquisition control instruction from the reconstruction computer to the digital acquisition control board and to transmit the target data from the digital acquisition control board to the reconstruction computer.
The communication protocol between the digital acquisition control board and the reconstruction computer may be PCIE protocol. When the protocol is adopted, two PCIE equipment channels can be established, each channel is mutually independent, and one channel can be used for transmitting a data acquisition instruction sent by a reconstruction computer; another channel may be used to upload the target data processed by the digital acquisition control board.
S120, converting the analog signals into digital signals based on at least one preset front-end signal processing board card.
It should be noted that, when converting the analog signals received by different radio frequency receiving coils, different front end signal processing boards are needed, because the number of channels that can be processed by the front end signal processing boards is fixed, the number of front end signal processing boards that need to be adopted by the number of channels is different; meanwhile, when analog signals corresponding to different cores are processed, a front-end signal processing board corresponding to the analog signals needs to be adopted, so that when signals received by the radio frequency receiving coil are processed, the front-end signal processing board to be used, namely a target front-end signal processing board, is determined first. Because the front-end processing board card is of a plug-in structure, different types and different numbers of front-end processing board cards can be plugged in according to the needs, and the technical effect of channel configurability is improved.
When the scanned positions are different, the adopted radio frequency receiving coils are different, and the number of channels required for processing signals received by the radio frequency receiving coils is also different, so that a front-end signal processing board card to be used is required to be determined according to the radio frequency receiving coils. Optionally, if the scanned portion is a head, a radio frequency receiving coil corresponding to the head is required to be adopted, and accordingly, the front end signal processing board can process 36 channels of data, which can be understood that before processing signals received by the radio frequency receiving coil, the front end signal processing board to be used can be determined first, optionally, according to analog signals corresponding to different cores to be received by the radio frequency receiving coil, the target front end signal processing board is determined from at least one front end signal processing board, so as to process the analog signals corresponding to different cores to be received into digital signals; the front-end signal processing board card is correspondingly arranged with the analog signals to be received, which correspond to different cores.
The front-end signal processing board card is used for converting an analog signal received by the radio frequency receiving coil into a digital signal. The number and types of the front-end signal processing boards can be set according to actual requirements, and optionally, the number of the front-end signal processing boards is two, and each front-end signal processing board is used for processing analog signals corresponding to different cores. The target front-end signal processing board card is the signal processing board card finally adopted.
For example, if the rf receiving coil is to receive an analog signal corresponding to a hydrogen atom, the number of channels required to receive the analog signal sent by the rf receiving coil and the front-end signal processing board corresponding to the hydrogen atom may be determined from a plurality of front-end signal processing boards, so that the number and types of front-end signal processing boards are determined, and the front-end signal processing board that is finally adopted is used as the target front-end signal processing board. In order to avoid attenuation of the analog signal in the transmission process, the front-end signal processing board card can be arranged outside the magnet, namely outside the magnetic resonance instrument, and is used for processing the analog signal received by the radio frequency receiving coil.
It should be noted that, if there are multiple rf receiving coils that respectively receive analog signals corresponding to different positions, it is possible that one front-end signal processing board card cannot process all the analog signals, and at this time, the number of front-end signal processing boards to be used may be determined according to the number of coils. For example, if one front-end signal processing board card can process 16 channels of data, when the coil number of the receiving coil is 48, at least 3 front-end signal processing boards can be inserted to process the 48 channels of data, and the number of front-end signal processing boards can be set according to the requirement in the practical application process.
In the embodiment of the invention, the front-end signal processing board card to be used can be determined according to the analog signals corresponding to different cores to be received, and the front-end signal processing board card is spliced at the corresponding position, so that the analog signals are processed, and the digital signals corresponding to the scanning position are obtained. That is, when the cores processed are different, the front-end signal processing board card may be replaced with a processing module corresponding to the core as needed. Of course, the front-end signal processing board card may be configured to collect data of at least two cores. When data acquisition is performed, channel data corresponding to the cores may be acquired as needed.
The front-end signal processing board card capable of being inserted is beneficial in that the front-end signal processing board card with different cores can be arranged according to actual requirements, and the number of channels required can be selected according to the requirements. Meanwhile, a multi-core mode magnetic resonance acquisition system is realized, the acquisition speed of data is improved when the system is scanned, and original data with a higher signal-to-noise ratio and higher resolution is provided for imaging of magnetic resonance equipment, so that the obtained imaging effect is better.
S130, acquiring digital signals based on a digital acquisition board preset in a digital acquisition control board, processing the digital signals by adopting a preset processing method to obtain target data, and sending the target data to an imaging reconstruction computer so as to obtain a scanning image corresponding to a scanning position according to the target data.
When the scanned positions are different, the adopted radio frequency receiving coils are different, and correspondingly, the number of channels required when the data corresponding to each coil are acquired is also different. Alternatively, if a scanned image of the head is to be acquired, the number of turns of the rf receiving coil used is 36, and accordingly, the required data acquisition channel is required to be 36 channels.
Optionally, each channel of the digital acquisition board card receives a digital signal corresponding to each coil in the radio frequency receiving coil respectively; when the number of the acquisition channels on the digital acquisition board is smaller than the total number of the coils in the radio frequency receiving coils, the number of the digital acquisition board cards is increased, so that the number of the acquisition channels of the digital acquisition board cards is larger than or equal to the total number of the coils in the radio frequency receiving coils; the digital acquisition board is inserted on the digital acquisition control board.
It will be appreciated that one digital acquisition board may support the acquisition of multiple channels of data. The digital acquisition board card can support the acquisition of 96-channel data, and if the number of bus coils of the radio frequency receiving coil is larger than the number of channels acquired by the digital acquisition board card, the number of the digital acquisition board card can be increased, so that the number of the acquisition channels can meet the total number of coils in the radio frequency receiving coil.
On the basis of the above technical solution, it should be further noted that the data acquisition instruction sent by the reconstruction computer further includes an acquisition sequence for acquiring the data of each channel, and an instruction to be executed at each preset time point. Optionally, when receiving the data acquisition instruction, determining at least one timestamp of the digital signal acquired by each acquisition channel of the data acquisition board based on a programmable gate array arranged on the digital acquisition control board; wherein the acquisition sequence comprises at least one time stamp; based on the acquisition sequence, digital signals corresponding to each acquisition channel are acquired, and line data corresponding to the acquisition sequence is obtained.
The data acquisition instruction comprises time stamp information of an execution instruction, namely a time point of executing each instruction. And a programmable gate array (FPGA) is arranged on the digital acquisition control board, the data acquisition instruction is analyzed according to the timestamp information, and the operation corresponding to each timestamp is determined. The time stamp can be an acquisition sequence of the digital acquisition board card for acquiring the data of each channel. At least one point in time at which each line of data is acquired may be included in the acquisition sequence.
Specifically, the programmable gate array can determine the time stamp of each acquisition channel for acquiring the digital signal, and acquire the digital signal corresponding to each channel at a corresponding time point to obtain line data corresponding to the acquisition sequence.
It should be noted that, if the digital signals corresponding to the channels are collected continuously, at least one line of data may be obtained.
In order to process the data acquired by the acquisition channel in time, the programmable gate array can process the digital signal according to the data acquisition instruction when the acquisition channel acquires the data. Optionally, the programmable gate array performs down-conversion and filtering processing on the digital signals in the linear data according to the data acquisition instruction, and stores the processed digital signals in a cache according to a preset storage format to obtain target data corresponding to the digital signals.
The down-conversion and filtering processes are used to avoid aliasing of the digital signal spectrum, which results in inaccurate imaging according to the processed data. After the data processing is completed, the data can be stored as a preset format, and the data in the preset format is packaged, and optionally, the obtained data can be stored in a cache of the digital acquisition control board.
The same data as the preset format may be used as the target data, and the target data may be transmitted to the reconstruction computer in order to enable the worker to obtain the image corresponding to the scanning location based on the target data.
Wherein, the target data is sent to the reconstruction computer through a pre-established communication channel.
According to the technical scheme, when a data acquisition instruction is received, a radio frequency switch matrix is started based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part, the analog signal is converted into a digital signal based on at least one preset front-end signal processing board card, the digital signal is acquired based on a digital acquisition board card preset in a digital acquisition control board, a preset processing method is adopted to process the digital signal to obtain target data, the target data is sent to an imaging reconstruction computer, so that a scanning image corresponding to the scanning part is obtained according to the target data, and the front-end signal processing board card and the digital acquisition control board are arranged in a scanning room; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels, so that the technical problems that in the prior art, analog signals are transmitted through cables, when the length of the cables is long, the generated signals are attenuated, the acquired data inaccurately reduce the accuracy of acquired data are solved, and if the data of the channels are required to be acquired, the number of the cables required by the transmitted signals is increased when the channels are required to be expanded, the complexity of cable wiring is improved, the technical problem of equipment cost is also improved, the data of the channels can be processed without using the cables, the data processing efficiency, the configurability of the acquisition channels and the accuracy of the data acquisition are improved, and meanwhile, the complexity of wiring and the technical effect of cost are reduced.
Examples
On the basis of the technical scheme, the digital signals subjected to down-conversion and filtering processing are required to be stored in a buffer. Fig. 3 is a schematic diagram of a data collection and storage process according to a second embodiment of the present invention.
For the sake of clearly describing the technical solution of the embodiment of the present invention, it may be assumed that the scanned portion is the head, the analog signal corresponding to the head information is received by the rf receiving coil, and after being processed by the front-end signal processing board, the digital signal corresponding to the head information is obtained, and the digital signal corresponding to the head information is collected by each channel of the digital collecting board. As depicted in fig. 3, the method comprises:
s301, starting an acquisition sequence.
It can be understood that each acquisition channel of the digital acquisition board card is determined to start acquiring the digital signal according to the time information in the data acquisition instruction.
S302, judging whether the acquisition channel acquires the head information of the user, if so, executing S303; if not, returning to execute the judgment again to judge whether the acquisition channel acquires the head information of the user.
And determining at least one time stamp for the acquisition channel to acquire the digital signal according to the acquisition sequence in the data acquisition instruction, and acquiring the digital signal at a preset time point. In the process of collecting the digital signals, whether each collecting channel collects the digital signals corresponding to the head of the user is judged. If not, restarting the acquisition, and if the digital signal corresponding to the head information is acquired, storing the digital signal corresponding to the head information.
S303, saving the header data and saving the information of each channel.
It should be noted that the digital acquisition control board realizes the control of the acquisition sequence through the FPGA, processes the data signal according to the acquisition sequence, and performs the ring buffer according to the scanning sequence. That is, as long as the digital acquisition channel acquires the digital signal corresponding to the header information, the digital signal may be processed, and the processed data may be stored in a buffer as a preset format.
Wherein, the processing of the digital signal may be: and performing down-conversion and filtering processing on the digital signal. When the header data is stored, the respective channel information may also be stored.
S304, storing the data of each channel.
Optionally, 36 data channels are required for collecting the data of the header information, and each channel data is stored in the process of collecting the data of each channel.
S305, judging whether the number of sampling points is the same as the preset number, if so, executing S306; if not, the process returns to S303.
The data acquisition instruction includes at least one piece of time stamp information, and each time stamp can be used as a preset number, and optionally, the number of the preset time stamps is 10. Judging whether the number of the sampling points reaches ten, if so, indicating that one sequence of data is acquired, and taking the acquired one sequence of data as line data. The data of at least one line may be acquired in the same manner.
S306, judging whether the sequence is ended, if not, returning to execute S302; if yes, S307 is executed.
It should be noted that the data acquisition instruction may include an instruction for acquiring how many sequences, that is, how many lines of data are acquired. Optionally, if the number of preset acquisition lines is 50, in the actual acquisition process, the number of acquired lines is greater than the preset number of lines, and the acquisition needs to be stopped, that is, the acquisition sequence is ended. Of course, when receiving the instruction to stop acquisition, acquisition of the digital signal data may be stopped.
It should be noted that, as long as data is collected, the collected digital signals need to be processed, and then buffered into the digital collection control board.
S307, data collection is finished.
It is understood that no data is acquired.
According to the technical scheme, when a data acquisition instruction is received, a radio frequency switch matrix is started based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part, the analog signal is converted into a digital signal based on at least one preset front-end signal processing board card, the digital signal is acquired based on a digital acquisition board card preset in a digital acquisition control board, a preset processing method is adopted to process the digital signal to obtain target data, the target data is sent to an imaging reconstruction computer, so that a scanning image corresponding to the scanning part is obtained according to the target data, and the front-end signal processing board card and the digital acquisition control board are arranged in a scanning room; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels, so that the technical problems that in the prior art, analog signals are transmitted through cables, when the length of the cables is long, the generated signals are attenuated, the acquired data inaccurately reduce the accuracy of acquired data are solved, and if the data of the channels are required to be acquired, the number of the cables required by the transmitted signals is increased when the channels are required to be expanded, the complexity of cable wiring is improved, the technical problem of equipment cost is also improved, the data of the channels can be processed without using the cables, the data processing efficiency, the configurability of the acquisition channels and the accuracy of the data acquisition are improved, and meanwhile, the complexity of wiring and the technical effect of cost are reduced.
Examples
On the basis of the technical scheme, the target data also needs to be sent to reconstruction calculation. Fig. 4 is a flowchart of uploading target data to reconstruction calculation according to a fourth embodiment of the present invention. For the sake of clearly describing the technical solution of the embodiment of the present invention, taking the header information of the collected data as an example, when the digital signal corresponding to the header is processed to obtain the target data, the target data is sent from the digital collection control board to the reconstruction computer. As shown in fig. 4, the method includes:
s401, when the number of acquisition lines is larger than the number of uploading lines and a storage space exists in reconstruction calculation, reading the nth line head information.
The data obtained after one acquisition sequence is performed may be used as line data. In the process of collecting the digital signals by each collecting channel, a plurality of collecting sequences can be executed, and collecting data corresponding to a plurality of lines is obtained.
The sequence acquisition instruction control module is illustratively realized by an FPGA, and executes the acquisition instructions according to the time stamps of the acquisition instructions. The acquisition process can be seen in fig. 5, when the sequence is started, the time t=0, then the acquisition of the first line is sequentially executed at t1 according to the time stamp of the instruction, the acquisition of the second line is executed at t2 until the mark line is ended, then the acquisition is ended, and after the data is completely transmitted into the memory of the PC, the data acquisition is ended. The uploading of the data takes the complete line as the uploaded data block, and one data uploading can be one data block or a data block consisting of a plurality of lines, and the specific size depends on the size of the buffer preparation during uploading and the number of the data lines in the current buffer.
That is, when the number of acquired lines is greater than the number of lines uploaded to the reconstruction computer, the buffered line data may be sent to the reconstruction computer; when data is not acquired, no operation may be performed. At this time, it is also determined that there is a corresponding storage space in the reconstruction computer for storing the uploaded data. If the corresponding storage space does not exist, the data can be not uploaded, and when the corresponding storage space exists, the target data uploaded can be received by reconstruction calculation. Reading the nth line data can be understood as uploading the data.
It should be further noted that, the PCIE protocol is adopted for communication between the digital acquisition control board and the reconstruction computer, and a corresponding transmission channel exists. Meanwhile, the memory space address for storing the target data can be allocated in advance by the reconstruction computer.
S402, reading channel m and nth line data, judging whether the number of the read channels is larger than the number of the acquisition channels, and if yes, executing S403; if not, the process returns to S401.
The data of the respective channels, and the data of each line are read. In the reading process, the relationship between the number of channels to be read and the number of acquisition channels is determined, if the number of channels to be read is greater than the number of acquisition channels, which indicates that the data of each channel has been acquired, S403 may be executed. If not, S401 may be re-executed.
It should be noted that m represents the number of channels, that is, the number of channels required to acquire the digital signal corresponding to the header information, the number of acquired lines is the number of times of how many acquisition sequences need to be performed, that is, how many pieces of line data need to be acquired, and n represents the line data. There is no necessary link between m and n.
S403, stopping uploading the data when the number of lines of the uploaded line data reaches the preset number of lines.
The preset line number may be a preset line number, or a line number acquired when a worker triggers an instruction of completion of acquisition. When the acquired line number reaches the preset line number, the target data is completely uploaded, and the uploading of the data can be stopped.
According to the technical scheme, when a data acquisition instruction is received, a radio frequency switch matrix is started based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part, the analog signal is converted into a digital signal based on at least one preset front-end signal processing board card, the digital signal is acquired based on a digital acquisition board card preset in a digital acquisition control board, a preset processing method is adopted to process the digital signal to obtain target data, the target data is sent to an imaging reconstruction computer, so that a scanning image corresponding to the scanning part is obtained according to the target data, and the front-end signal processing board card and the digital acquisition control board are arranged in a scanning room; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels, so that the technical problems that in the prior art, analog signals are transmitted through cables, when the length of the cables is long, the generated signals are attenuated, the acquired data inaccurately reduce the accuracy of acquired data are solved, and if the data of the channels are required to be acquired, the number of the cables required for transmitting the signals is increased when the channels are required to be expanded, the complexity of cable wiring is improved, the technical problem of equipment cost is also improved, the data of the channels can be processed without using the cables, the data processing efficiency, the configurability of the acquisition channels and the accuracy of the data acquisition are improved, and meanwhile, the complexity of wiring and the technical effect of cost are reduced.
Examples
Fig. 6 is a schematic structural diagram of a data processing apparatus according to a fourth embodiment of the present invention, where the apparatus includes: a data acquisition control module 610, an analog-to-digital conversion module 620 and a data processing module 630.
The data acquisition control module 610 is configured to, when receiving a data acquisition instruction, turn on a radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, where the radio frequency receiving coil receives an analog signal corresponding to a scanning location; the analog-to-digital conversion module 620 is configured to convert an analog signal into a digital signal based on at least one front-end signal processing board that is preset; the data processing module 630 is configured to collect a digital signal based on a digital acquisition board preset in the digital acquisition control board, process the digital signal by adopting a preset processing method to obtain target data, and send the target data to the imaging reconstruction computer, so as to obtain a scan image corresponding to the scan position according to the target data; the front-end signal processing board card and the digital acquisition control board are arranged in the scanning room; the digital acquisition board is inserted into the digital acquisition control board; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels.
According to the technical scheme, when a data acquisition instruction is received, a radio frequency switch matrix is started based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part, the analog signal is converted into a digital signal based on at least one preset front-end signal processing board card, the digital signal is acquired based on a digital acquisition board card preset in a digital acquisition control board, a preset processing method is adopted to process the digital signal to obtain target data, the target data is sent to an imaging reconstruction computer, so that a scanning image corresponding to the scanning part is obtained according to the target data, and the front-end signal processing board card and the digital acquisition control board are arranged in a scanning room; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels, so that the technical problems that in the prior art, analog signals are transmitted through cables, when the length of the cables is long, the generated signals are attenuated, the obtained data are inaccurate, if the data of the channels need to be acquired, the number of the cables is increased when the signals are transmitted when the channels need to be expanded, if the number of the channels is large, the number of the cables for transmitting the signals of each channel is increased, wiring is complex, equipment cost is improved, the accuracy of acquired data is reduced, the data of the channels can be processed without using the cables, the data processing efficiency is improved, the accuracy of the acquired data is improved, and meanwhile, the complexity of wiring and the technical effect of cost are reduced.
On the basis of the above technical solution, the analog-to-digital conversion module is further configured to, before being configured to convert the analog signal into the digital signal based on at least one preset front-end signal processing board card:
determining a target front-end signal processing board card from at least one front-end signal processing board card according to the analog signals corresponding to different cores to be received by the radio frequency receiving coil, so as to process the analog signals corresponding to different cores to be received into digital signals; the front-end signal processing board card is arranged corresponding to the analog signals to be received, which correspond to different cores.
On the basis of the above technical solutions, the data processing module is further configured to:
each channel of the digital acquisition board card receives digital signals corresponding to each coil in the radio frequency receiving coils respectively; when the number of the acquisition channels on the digital acquisition board is smaller than the total number of the coils in the radio frequency receiving coil, increasing the number of the digital acquisition board cards so that the number of the acquisition channels of the digital acquisition board cards is larger than or equal to the total number of the coils in the radio frequency receiving coil; the digital acquisition board is inserted into the digital acquisition control board.
On the basis of the above technical solutions, the data processing module is further configured to:
when a data acquisition instruction sent by the reconstruction computer is received, determining at least one time stamp of each acquisition channel of the data acquisition board for acquiring the digital signal based on a programmable gate array arranged on a digital acquisition control board; wherein the acquisition sequence comprises at least one timestamp; based on the acquisition sequence, digital signals corresponding to the acquisition channels are acquired as line data corresponding to the acquisition sequence.
On the basis of the above technical solutions, the data processing module is further configured to:
the programmable gate array performs down-conversion and filtering processing on the digital signals in the line data, and stores the processed digital signals into a cache according to a preset storage format to obtain target data corresponding to the digital signals.
On the basis of the above technical solutions, the data processing module is further configured to, before being configured to acquire the digital signal based on the digital acquisition board preset in the digital acquisition control board, process the digital signal by using a preset processing method to obtain target data, and send the target data to an imaging reconstruction computer:
Establishing a communication protocol between the digital acquisition control board and the reconstruction computer; the communication protocol is used for sending the data acquisition control instruction sent by the reconstruction computer to the digital acquisition control board, and sending the target data from the digital acquisition control board to the reconstruction computer.
On the basis of the technical scheme, the data processing module is further used for:
and uploading the target data to a preset storage space in a reconstruction computer when the number of lines of the target data in the cache is detected to be larger than the number of lines sent to the reconstruction computer and the preset storage space in the reconstruction computer is empty.
The data processing device provided by the embodiment of the invention can execute the data processing method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method.
It should be noted that each unit and module included in the above apparatus are only divided according to the functional logic, but not limited to the above division, so long as the corresponding functions can be implemented; in addition, the specific names of the functional units are also only for distinguishing from each other, and are not used to limit the protection scope of the embodiments of the present invention.
Examples
Fig. 7 is a schematic structural diagram of an apparatus according to a fourth embodiment of the present invention. Fig. 7 shows a block diagram of an exemplary device 70 suitable for use in implementing the embodiments of the present invention. The device 70 shown in fig. 7 is merely an example and should not be construed as limiting the functionality and scope of use of embodiments of the present invention.
As shown in fig. 7, the device 70 is embodied in the form of a general purpose computing device. The components of device 70 may include, but are not limited to: one or more processors or processing units 701, a system memory 702, and a bus 703 that connects the various system components (including the system memory 702 and the processing units 701).
The system memory 702 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM) 704 and/or cache memory 705. Device 70 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 706 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 7, commonly referred to as a "hard drive"). Although not shown in fig. 7, a magnetic disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In such cases, each drive may be coupled to bus 703 through one or more data medium interfaces. Memory 702 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of embodiments of the invention.
A program/utility 708 having a set (at least one) of program modules 707 may be stored in, for example, memory 702, such program modules 707 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 707 generally perform the functions and/or methods of the embodiments described herein.
The device 70 may also communicate with one or more external devices 709 (e.g., keyboard, pointing device, display 710, etc.), one or more devices that enable a user to interact with the device 70, and/or any devices (e.g., network card, modem, etc.) that enable the device 70 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 711. Also, the device 70 may communicate with one or more networks such as a Local Area Network (LAN), a Wide Area Network (WAN) and/or a public network, such as the Internet, through a network adapter 712. As shown, network adapter 712 communicates with other modules of device 70 over bus 703. It should be appreciated that although not shown in fig. 7, other hardware and/or software modules may be used in connection with device 70, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 701 executes various functional applications and data processing by running a program stored in the system memory 702, for example, implements the data processing method provided by the embodiment of the present invention.
Examples
A fifth embodiment of the present invention also provides a storage medium containing computer-executable instructions for performing a data processing method when executed by a computer processor.
The data processing method comprises the following steps: when a data acquisition instruction is received, starting a radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part; converting the analog signal into a digital signal based on at least one preset front-end signal processing board card; acquiring the digital signal based on a digital acquisition board preset in a digital acquisition control board, processing the digital signal by adopting a preset processing method to obtain target data, and sending the target data to an imaging reconstruction computer so as to obtain a scanning image corresponding to the scanning part according to the target data; the front-end signal processing board card and the digital acquisition control board are arranged in the scanning room; the digital acquisition board is inserted into the digital acquisition control board; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In this document, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for embodiments of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. A method of data processing, comprising:
when a data acquisition instruction is received, starting a radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to a radio frequency receiving coil, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part;
converting the analog signal into a digital signal based on at least one preset front-end signal processing board card;
acquiring the digital signal based on a digital acquisition board preset in a digital acquisition control board, processing the digital signal by adopting a preset processing method, circularly caching the processed data to obtain target data, and sending the target data to an imaging reconstruction computer so as to obtain a scanning image corresponding to the scanning position according to the target data;
The front-end signal processing board card and the digital acquisition control board are arranged in the scanning room; the digital acquisition board is inserted into the digital acquisition control board; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels.
2. The method of claim 1, further comprising, prior to the converting the analog signal to a digital signal based on the at least one pre-set front end signal processing board card:
determining a target front-end signal processing board card from at least one front-end signal processing board card according to the analog signals corresponding to different cores to be received by the radio frequency receiving coil, so as to process the analog signals corresponding to different cores to be received into digital signals;
the front-end signal processing board card is arranged corresponding to the analog signals to be received, which correspond to different cores.
3. The method of claim 1, wherein the receiving the digital signal based on a digital acquisition board preset in a digital acquisition control board comprises:
each channel of the digital acquisition board card receives digital signals corresponding to each coil in the radio frequency receiving coils respectively;
When the number of the acquisition channels on the digital acquisition board is smaller than the total number of the coils in the radio frequency receiving coil, increasing the number of the digital acquisition board cards so that the number of the acquisition channels of the digital acquisition board cards is larger than or equal to the total number of the coils in the radio frequency receiving coil;
the digital acquisition board is inserted into the digital acquisition control board.
4. The method of claim 3, wherein the capturing the digital signal based on a digital capture board preset in a digital capture control board comprises:
when a data acquisition instruction is received, determining at least one time stamp for each acquisition channel of the data acquisition board to acquire the digital signal based on a programmable gate array arranged on a digital acquisition control board; wherein the acquisition sequence comprises at least one time stamp;
based on the acquisition sequence, digital signals corresponding to the acquisition channels are acquired, and line data corresponding to the acquisition sequence is obtained.
5. The method of claim 4, wherein the processing the digital signal using the preset processing method to obtain the target data comprises:
And the programmable gate array performs down-conversion and filtering processing on the digital signals in the line data according to the data acquisition instruction, and stores the processed digital signals into a cache according to a preset storage format to obtain target data corresponding to the digital signals.
6. The method according to claim 1, wherein before the digital signal is acquired based on the digital acquisition board preset in the digital acquisition control board and the digital signal is processed by a preset processing method to obtain target data, the method further comprises:
establishing a communication protocol between the digital acquisition control board and the reconstruction computer;
the communication protocol is used for sending the data acquisition control instruction sent by the reconstruction computer to the digital acquisition control board, and sending the target data from the digital acquisition control board to the reconstruction computer.
7. The method of claim 5, wherein said transmitting said target data into an imaging reconstruction computer comprises:
and uploading the target data to a preset storage space in a reconstruction computer when the number of lines of the target data stored in the cache is detected to be larger than the number of lines sent to the reconstruction computer and the preset storage space in the reconstruction computer is empty.
8. A data processing apparatus, comprising:
the data acquisition control module is used for starting the radio frequency switch matrix based on the data acquisition instruction to gate a channel corresponding to the radio frequency receiving coil when the data acquisition instruction is received, wherein the radio frequency receiving coil receives an analog signal corresponding to a scanning part;
the analog-to-digital conversion module is used for converting the analog signals into digital signals based on at least one preset front-end signal processing board card;
the data processing module is used for acquiring the digital signals based on a digital acquisition board card preset in a digital acquisition control board, processing the digital signals by adopting a preset processing method and circularly caching to obtain target data, and sending the target data to an imaging reconstruction computer so as to obtain a scanning image corresponding to the scanning part according to the target data;
the front-end signal processing board card and the digital acquisition control board are arranged in the scanning room; the digital acquisition board is inserted into the digital acquisition control board; the digital acquisition board card comprises a plurality of acquisition channels and is used for simultaneously acquiring digital signals corresponding to the channels.
9. A computing device, the device comprising:
one or more processors;
storage means for storing one or more programs,
when executed by the one or more processors, causes the one or more processors to implement the data processing method of any of claims 1-7.
10. A storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the data processing method of any of claims 1-7.
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