CN112263277A - Ultrasonic Doppler blood flow imaging method, device, equipment and computer medium - Google Patents
Ultrasonic Doppler blood flow imaging method, device, equipment and computer medium Download PDFInfo
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Abstract
The application discloses an ultrasonic Doppler blood flow imaging method, an ultrasonic Doppler blood flow imaging device, an ultrasonic Doppler blood flow imaging equipment and a computer medium, wherein the wave front propagation direction of transmitted ultrasonic waves passing through a position to be detected is determined, and the transmitted ultrasonic waves are ultrasonic waves transmitted by a focusing method; taking the wave front propagation direction as a receiving beam synthesis direction; according to the receiving beam synthesis direction, carrying out receiving beam synthesis on the echo information corresponding to the position to be detected to obtain a receiving beam synthesis scanning line; and calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning lines. In the method and the device, the receiving beam forming scanning line with the direction and the wave front propagation direction on the same straight line can be obtained, the accuracy of the receiving beam forming scanning line is guaranteed, the direction of the blood flow motion parameter can be guaranteed to be consistent with the wave front propagation direction, the Doppler frequency shift generated by the ultrasonic wave emission and the position to be detected is the truest in the wave front propagation direction, and therefore the accuracy of the blood flow motion parameter can be guaranteed.
Description
Technical Field
The present application relates to the field of ultrasound imaging technology, and more particularly, to an ultrasound doppler blood flow imaging method, apparatus, device, and computer medium.
Background
The ultrasonic wave is a sound wave with frequency higher than 20000Hz, and it has good directivity, strong reflection capability, easy to obtain more concentrated sound energy, and the propagation distance in water is far longer than that in air, and it can be used for distance measurement, speed measurement, cleaning, welding, breaking stone, sterilization, etc. The method has a plurality of applications in medicine, military, industry and agriculture. When the ultrasonic wave is applied in the medical field, the echo intensity information can be used for reconstruction imaging, and can also be used for detecting and calculating the moving direction and speed of blood flow, for example, calculating the moving direction and speed of blood flow by an ultrasonic doppler vector blood flow imaging method. In the ultrasonic doppler vector blood flow imaging method, ultrasonic focusing emission is required to be performed on a position to be detected in multiple directions, scanning information in each direction is determined according to received ultrasonic waves, and then the moving direction and speed of blood flow are determined according to the scanning information in each direction.
However, in the process of determining the moving direction and speed of blood flow by applying the ultrasonic doppler vector blood flow imaging method, there are cases where the determined moving direction and speed of blood flow are inaccurate.
In view of the above, how to improve the accuracy of ultrasonic doppler blood flow imaging is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The present application aims to provide an ultrasound doppler blood flow imaging method, an ultrasound doppler blood flow imaging device, an electronic device, and a computer-readable storage medium, which can solve the technical problem of how to improve the accuracy of ultrasound doppler blood flow imaging to a certain extent.
In a first aspect, the present application provides an ultrasonic doppler blood flow imaging method, including:
determining the wave front propagation direction of transmitted ultrasonic waves passing through a position to be detected, wherein the transmitted ultrasonic waves are ultrasonic waves transmitted by a focusing method;
taking the wavefront propagation direction as a receive beamforming direction;
according to the receiving beam forming direction, carrying out receiving beam forming on the echo information corresponding to the position to be detected to obtain a receiving beam forming scanning line;
and calculating blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning line.
Preferably, before determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected, the method further includes:
determining a preset number of focus positions in other positions except the position to be detected;
and transmitting ultrasonic waves to each focus position by the focusing method, and repeatedly transmitting the ultrasonic waves to each focus position for a preset time, wherein the preset time is more than or equal to 2.
Preferably, the transmitting of the ultrasonic waves to the respective focus positions by the focusing method includes:
and sequentially transmitting ultrasonic waves to each focus position by the focusing method.
Preferably, the transmitting of the ultrasonic waves to the respective focus positions by the focusing method includes:
transmitting ultrasonic waves to the respective focus positions simultaneously by the focusing method.
Preferably, the determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected includes:
determining the transmitting parameters of the time delay focusing method;
determining probe parameters of an ultrasonic probe which transmits ultrasonic waves;
inputting the emission parameters and the probe parameters into sound field simulation equipment;
acquiring an initial wave front propagation direction obtained after the sound field simulation equipment performs transmission simulation according to the transmission parameters and the probe parameters;
determining the initial wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected as the wave front propagation direction.
Preferably, the determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected includes:
determining an ultrasonic probe array element which faces the position to be detected and is used for transmitting ultrasonic waves;
determining a focus position of the time delay focusing method;
and determining the connection direction of the ultrasonic probe array element and the corresponding focus position as the wave front propagation direction.
In a second aspect, the present application provides an ultrasonic doppler blood flow imaging apparatus comprising:
the wave front propagation direction determining module is used for determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected, wherein the transmitted ultrasonic wave is the ultrasonic wave transmitted by a focusing method;
a receiving beam synthesis direction determining module, configured to use the wavefront propagation direction as a receiving beam synthesis direction;
a receiving beam forming scanning line determining module, configured to perform receiving beam forming on the echo information corresponding to the position to be detected according to the receiving beam forming direction to obtain a receiving beam forming scanning line;
and the blood flow motion parameter determining module is used for calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning line.
Preferably, also comprises
The focus position determining module is used for determining a preset number of focus positions in other positions except the position to be detected before the wavefront propagation direction determining module determines the wavefront propagation direction of the transmitted ultrasonic wave passing through the position to be detected;
and the first transmitting module is used for transmitting ultrasonic waves to each focus position by the focusing method and repeatedly transmitting preset ultrasonic waves to each focus position, wherein the preset ultrasonic waves are more than or equal to 2.
In a third aspect, the present application provides an electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the ultrasound doppler flow imaging method as described above when executing the computer program.
In a fourth aspect, the present application provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, realizes the steps of the ultrasound doppler flow imaging method as mentioned in any one of the above.
The ultrasonic Doppler blood flow imaging method determines the wave front propagation direction of transmitted ultrasonic waves passing through a position to be detected, and the transmitted ultrasonic waves are ultrasonic waves transmitted by a focusing method; taking the wave front propagation direction as a receiving beam synthesis direction; according to the receiving beam synthesis direction, carrying out receiving beam synthesis on the echo information corresponding to the position to be detected to obtain a receiving beam synthesis scanning line; and calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning lines.
In the method, the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected needs to be determined, and the wave front propagation direction is taken as the receiving beam synthesis direction, so that after the receiving beam synthesis is performed on the echo information corresponding to the position to be detected according to the receiving beam synthesis direction, the receiving beam synthesis scanning line with the direction being in the same straight line with the wave front propagation direction can be obtained, and the accuracy of the receiving beam synthesis scanning line is ensured. The ultrasonic Doppler blood flow imaging device, the electronic equipment and the computer readable storage medium provided by the application also solve the corresponding technical problems.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a first flowchart of an ultrasonic doppler blood flow imaging method according to an embodiment of the present application;
FIG. 2 is a diagram illustrating a direction of a receive beam forming and a direction of movement in the prior art;
FIG. 3 is a schematic diagram of the receive beam forming direction and the moving direction of the present application;
FIG. 4 is a second flowchart of a method for ultrasonic Doppler blood flow imaging according to an embodiment of the present application;
FIG. 5 is a diagram illustrating the results of an ultrasonic focused scan;
fig. 6 is a schematic structural diagram of an ultrasonic doppler blood flow imaging apparatus according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of an ultrasonic doppler blood flow imager according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a first flowchart of an ultrasonic doppler blood flow imaging method according to an embodiment of the present application.
The ultrasonic Doppler blood flow imaging method provided by the embodiment of the application can comprise the following steps:
step S101: determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected, wherein the transmitted ultrasonic wave is the ultrasonic wave transmitted by a focusing method.
In practical application, if the transmitted ultrasonic wave does not pass through the position to be detected, the corresponding information of the position to be detected cannot be obtained by means of the echo information of the transmitted ultrasonic wave at the position to be detected, and ultrasonic doppler blood flow imaging cannot be performed on the position to be detected, so that in order to determine the blood flow operation parameters of the position to be detected through the ultrasonic wave, the ultrasonic wave needs to be ensured to pass through the position to be detected. In addition, the transmitted ultrasonic waves are ultrasonic waves transmitted by a focusing method, so that the transmitting directions of the ultrasonic waves of all beams are different in one focusing transmitting process, and therefore, the accurate transmitting direction of each ultrasonic wave needs to be determined, namely, the wave front propagation direction of the transmitted ultrasonic waves passing through the position to be detected can be determined firstly in the application. In addition, since the ultrasonic waves are emitted by the focusing method, the ultrasonic waves pass through the focal position, and the ultrasonic waves on the connecting line of the focal position and the position to be detected can be determined as the emitted ultrasonic waves passing through the position to be detected if the ultrasonic waves pass through the position to be detected.
It should be noted that a wavefront refers to a plane of particle composition that has just begun to shift at a time when a wave propagates through a medium, the wavefront represents the spatial location at which the wave energy arrives at a time, is moving, and is orthogonal to the rays. Since ultrasonic waves also belong to waves, the propagation direction of ultrasonic waves can be determined by means of the wave front propagation direction.
In a specific application scene, in the process of determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected, the wave front propagation direction of the transmitted ultrasonic wave can be accurately determined by means of sound field simulation equipment, and in the process, the transmission parameter of a time delay focusing method needs to be determined; determining probe parameters of an ultrasonic probe which transmits ultrasonic waves; inputting the emission parameters and the probe parameters into sound field simulation equipment; acquiring an initial wave front propagation direction obtained after the sound field simulation equipment performs transmission simulation according to the transmission parameters and the probe parameters; the initial wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected is determined as the wave front propagation direction of the transmitted ultrasonic wave.
It should be noted that the parameter information of the transmission parameters and the probe parameters can be determined according to actual needs, for example, the transmission parameters may include transmission focus information, a transmission aperture, ultrasonic probe array element information for transmitting ultrasonic waves, and the like, and the probe parameters may include transmission delay, transmission waveform, and the like.
In a specific application scenario, in the process of determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected, the wave front propagation direction of each position point of a scanning area can be simply considered to be approximately the direction towards or away from the transmitted focusing focus, as shown in fig. 3, so that a line which starts from a certain position of an ultrasonic probe, is connected with the focus position and extends forwards can be used as the wave front propagation direction of any position point through which the ultrasonic wave transmitted by the ultrasonic probe passes, that is, an ultrasonic probe array element which faces the position to be detected and is used for transmitting the ultrasonic wave can be determined; determining the focus position of a delay focusing method; and determining the connecting direction of the array element of the ultrasonic probe and the corresponding focus position as the wave front propagation direction of the transmitted ultrasonic wave.
Step S102: the wave front propagation direction is used as the receiving beam forming direction of the echo information corresponding to the transmitted ultrasonic wave.
Step S103: and according to the receiving beam synthesis direction, performing receiving beam synthesis on the echo information corresponding to the position to be detected to obtain a receiving beam synthesis scanning line.
In practical application, in ultrasonic doppler blood flow imaging, the doppler shift generated by ultrasonic waves and moving tissues or blood flow is the truest in the backward direction of wave front propagation, so in order to accurately determine the doppler shift generated by ultrasonic waves at a position to be detected, it is necessary to use the wave front propagation direction as the receiving beam synthesis direction of echo information corresponding to the transmitted ultrasonic waves, and perform receiving beam synthesis on the echo information corresponding to the detection position according to the receiving beam synthesis direction to obtain a receiving beam synthesis scan line, and the receiving beam synthesis scan line can reflect the echo intensity, echo phase and the like at any position on the line.
It should be noted that, in the prior art, when determining blood flow operation parameters in a certain moving direction, it is necessary to focus the transmitted ultrasonic wave on the position to be detected from the moving direction, and it is assumed that the propagation direction of the transmitted ultrasonic wave and the receiving direction are consistent, and both directions are the moving direction, so in the prior art, the receiving beam synthesis is performed according to the moving direction, however, in the process of focusing the transmitted ultrasonic wave, except that the receiving beam synthesis direction in the middle position of the transmitted beam and the moving direction are consistent, the receiving beam synthesis directions in other positions are not consistent with the moving direction, and the more the deviation from the middle position of the transmitted beam, the greater the deviation degree of the receiving beam synthesis direction from the moving direction is, for easy understanding, see fig. 2, the circular arc in fig. 2 represents the wave front, the arrow on the circular arc represents the wave front propagation direction of the ultrasonic wave front of the point, if the receive beam synthesis is performed according to the movement direction in the prior art, the obtained receive beam synthesis scan line is not in a straight line with the wavefront propagation direction, so that the receive beam synthesis scan line is inaccurate, and accurate blood flow movement parameters cannot be obtained. The present application can ensure that the receive beam synthesized scan line is aligned with the wavefront propagation direction, and with reference to fig. 3, the accuracy of the receive beam synthesized scan line can be ensured, thereby ensuring the accuracy of the blood flow motion parameter.
It should be noted that, in the embodiment of the present application, beam synthesis is performed according to the wave front propagation direction of the transmitted ultrasonic wave, so that signal receiving lines in different directions are synthesized for each transmission, and in the process of scanning a frame of ultrasonic wave, after focused transmission is performed at different focal points, a plurality of signal receiving lines in different directions are formed at the position to be detected. Therefore, the receiving beam synthesis scanning lines in multiple directions, namely signal receiving lines, can be obtained through one frame of ultrasonic scanning, the ultrasonic transmitting direction does not need to be considered, and compared with the existing method that the receiving beam synthesis scanning lines in multiple directions can be obtained only by transmitting ultrasonic waves from multiple directions, the ultrasonic transmitting times can be reduced, the operating efficiency of electronic equipment is improved, and the operation burden of a user can be relieved.
For convenience of understanding, it is assumed that each imaging point of each frame image in the prior art needs to be scanned for a preset time, and the time for scanning a frame is T, then for ultrasonic doppler blood flow imaging which needs to scan K different directions, it needs to scan the duration of the product value of the preset time and K for scanning a frame, so that the time for scanning a frame is at least K × T, and the corresponding imaging frame rate is reduced to one K times of the original frame rate.
In addition, in the process of performing receive beam synthesis on the echo information corresponding to the position to be detected according to the receive beam synthesis direction, delay superposition or apodization calculation and the like can be performed on the echo information corresponding to the position to be detected; in the delay superposition process, large delay can be carried out on the echo information which arrives first, and small delay can be carried out on the echo signal which arrives later, so that the delayed echo information is aligned in time, and then superposition is carried out; if weighting and stacking are carried out in the stacking process, apodization calculation is formed, for example, the stacking weight of the delayed echo signal is determined according to the distance between the echo information and the center of the scanning line, and the delayed echo information is stacked according to the stacking weight, and the like.
Step S104: and calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning lines.
In practical application, since the receiving beam synthesis scanning line carries the direction information and the echo information in the direction, the projection component of the blood flow velocity in a certain direction can be calculated according to the receiving beam synthesis scanning line, and then the real blood flow velocity is determined according to the projection component of the blood flow velocity in each direction, so that after the receiving beam synthesis scanning line is obtained, the blood flow velocity of the position to be detected can be calculated based on the receiving beam synthesis scanning line.
It should be noted that, in the process of calculating the blood flow motion parameter of the position to be detected based on the receive beam synthesis scan line, the receive beam synthesis scan line in the preset direction may be firstly demodulated and extracted from the receive beam synthesis scan line, and then wall filtering, complex autocorrelation calculation, phase angle difference calculation, blood flow velocity synthesis, and the like are performed on the receive beam synthesis scan line in the preset direction to obtain the final blood flow motion parameter, the relevant description in the process may refer to the prior art, which is not described herein again, for example, the formula of the complex autocorrelation calculation may be as follows:
wherein, S represents IQ signals obtained by demodulating the receiving beam synthesis scanning lines, S (n +1) represents IQ signals obtained by demodulating the (n +1) th receiving beam synthesis scanning lines, and E represents the total ultrasonic wave transmitting and receiving times of the position to be detected; r (1) represents the result of the complex autocorrelation calculation;
the formula for calculating the phase angle difference may be as follows:
where img () denotes taking the imaginary part of the complex number, real () denotes taking the real part of the complex number, and arctan 2() denotes the value range of [ - π, π]Calculating the arc tangent of the target;
represents a phase angle difference;
the formula for calculating the blood flow velocity may be:
where v denotes a blood flow velocity, C denotes an ultrasonic wave propagation velocity, and fc denotes an ultrasonic wave frequency.
The ultrasonic Doppler blood flow imaging method determines the wave front propagation direction of transmitted ultrasonic waves passing through a position to be detected, and the transmitted ultrasonic waves are ultrasonic waves transmitted by a focusing method; taking the wave front propagation direction as a receiving beam forming direction of echo information corresponding to the transmitted ultrasonic wave; according to the receiving beam synthesis direction, carrying out receiving beam synthesis on the echo information corresponding to the position to be detected to obtain a receiving beam synthesis scanning line; and calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning lines. In the method, the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected needs to be determined, and the wave front propagation direction is taken as the receiving beam forming direction of the echo information corresponding to the transmitted ultrasonic wave, so that after the echo information corresponding to the position to be detected is subjected to receiving beam forming according to the receiving beam forming direction, a receiving beam forming scanning line with the direction being in a straight line with the wave front propagation direction can be obtained, and the accuracy of the receiving beam forming scanning line is ensured.
Referring to fig. 4, fig. 4 is a second flowchart of an ultrasonic doppler blood flow imaging method according to an embodiment of the present application.
The ultrasonic Doppler blood flow imaging method provided by the embodiment of the application can comprise the following steps:
step S201: and determining a preset number of focus positions in other positions except the positions to be detected.
Step S202: and transmitting ultrasonic waves to each focus position by a focusing method, and repeatedly transmitting the ultrasonic waves to each focus position for a preset time, wherein the preset time is more than or equal to 2.
In practical application, in a one-time ultrasonic doppler blood flow imaging method, blood flow imaging may need to be performed on a plurality of positions to be detected, in order to be able to quickly determine blood flow motion parameters of each position to be detected, before determining the wave front propagation direction of the transmitted ultrasonic waves passing through the position to be detected, a preset number of focal positions may be determined in other positions than the position to be detected, and the ultrasonic waves are transmitted to the respective focal positions by a focusing method, so that, in one round of ultrasonic focusing and transmitting process, a plurality of ultrasonic waves distributed in a scanning area can be obtained, at the moment, the ultrasonic waves passing through each position to be detected can be identified, so that the transmitted ultrasonic waves corresponding to each position to be detected can be obtained through one round of ultrasonic focusing transmission, and equivalently, the blood flow motion parameters of a plurality of positions to be detected can be obtained through one round of ultrasonic focusing transmission.
For convenience of understanding, the process is described with reference to fig. 5, in fig. 5, a blood flow calculation position point, that is, a position to be detected, is shown, as shown in fig. 5, after ultrasonic waves are transmitted to each focus position, ultrasonic waves covering a scanning area can be obtained, in the process, since the wave front propagation direction of each ultrasonic wave is different, and at most only one ultrasonic wave passes through the position to be detected in one focusing process, for each position to be detected located in the scanning area, after one round of ultrasonic wave focusing transmission, at most a preset number of transmitted ultrasonic waves passing through the position to be detected are obtained, and the number of transmitted ultrasonic waves determines the number of components of a blood flow motion parameter, so that the number of focus positions can be determined according to the number of components of the blood flow motion parameter, for example, the value of the preset number can be set as the number of components of the blood flow motion parameter, or to a value greater than the number of components of the blood flow movement parameter, etc.
It should be noted that, in practical applications, when determining the component of the blood flow motion parameter in a certain direction, it is necessary to determine the movement information of the position to be detected in the certain direction, and for this reason, it is necessary to sample the position to be detected in the certain direction for multiple times, that is, in this application, it is necessary to repeatedly send the preset-time ultrasonic wave to each focus position, so that the preset-time movement information of the position to be detected in each direction can be obtained, and the preset time is greater than or equal to 2. In addition, the preset number of focal positions may be positions arranged in a horizontal direction, positions arranged in a vertical direction, random positions, and the like, and the present application is not limited specifically herein.
In practical applications, limited by the performance of the ultrasound transmitting apparatus, in the process of transmitting the ultrasound waves to the respective focal positions by the focusing method, in order to facilitate the transmission of the ultrasound waves to the respective focal positions, the ultrasound waves may be sequentially transmitted to the respective focal positions by the focusing method. Since the ultrasonic waves are transmitted to the focus positions in sequence, the ultrasonic waves can be transmitted to one focus position and then to the other focus position, and the requirement on the performance of the ultrasonic wave transmitting instrument is low.
In practical application, although the ultrasonic waves are sequentially transmitted to each focal position, the performance requirement on the transmitting instrument is low, the ultrasonic waves are sequentially transmitted to each focal position, so that time difference exists between the ultrasonic waves transmitted by each focal position, the components of the blood flow motion parameters in all directions at the same time are not favorably obtained, and the accuracy of the finally obtained blood flow motion parameters is influenced.
Step S203: the wave front propagation direction of the transmitted ultrasonic waves passing through the position to be detected is determined.
Step S204: the wave front propagation direction is used as the receiving beam forming direction of the echo information corresponding to the transmitted ultrasonic wave.
Step S205: and according to the receiving beam synthesis direction, performing receiving beam synthesis on the echo information corresponding to the position to be detected to obtain a receiving beam synthesis scanning line.
Step S206: and calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning lines.
In this embodiment, through determine the focus position of predetermineeing the quantity in waiting to detect other positions beyond the position, through focusing method to each focus position transmission ultrasonic wave, can obtain a scanning zone that distributes and have the ultrasonic wave of each not equidirectional, like this, when having a plurality of positions of waiting to detect in the scanning zone, only need carry out a round ultrasonic wave focus transmission, alright obtain the transmission ultrasonic wave through each position of waiting to detect, and then can obtain each blood flow motion parameter of waiting to detect the position, can carry out ultrasonic doppler blood flow formation of image in batches.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an ultrasonic doppler blood flow imaging apparatus according to an embodiment of the present application.
The ultrasonic doppler blood flow imaging device provided by the embodiment of the application can comprise:
a wavefront propagation direction determining module 101, configured to determine a wavefront propagation direction of an emitted ultrasonic wave passing through a position to be detected, where the emitted ultrasonic wave is an ultrasonic wave emitted by a focusing method;
a receive beamforming direction determining module 102, configured to use a wavefront propagation direction as a receive beamforming direction of echo information corresponding to the transmitted ultrasonic wave;
a receive beam forming scan line determining module 103, configured to perform receive beam forming on the echo information corresponding to the position to be detected according to the receive beam forming direction, so as to obtain a receive beam forming scan line;
and a blood flow motion parameter determination module 104, configured to calculate a blood flow motion parameter of the position to be detected based on the receive beam synthesis scan line.
The ultrasonic doppler blood flow imaging device provided by the embodiment of the application can further include:
the focus position determining module is used for determining a preset number of focus positions in other positions except the position to be detected before the wavefront propagation direction determining module determines the wavefront propagation direction of the transmitted ultrasonic wave passing through the position to be detected;
the first transmitting module is used for transmitting ultrasonic waves to each focus position by a focusing method and repeatedly transmitting preset ultrasonic waves to each focus position, wherein the preset ultrasonic waves are more than or equal to 2.
In an ultrasound doppler blood flow imaging apparatus provided in an embodiment of the present application, a first transmitting module may include:
a first transmission unit for sequentially transmitting ultrasonic waves to the respective focus positions by a focusing method.
In an ultrasound doppler blood flow imaging apparatus provided in an embodiment of the present application, a first transmitting module may include:
a second transmitting unit for simultaneously transmitting ultrasonic waves to the respective focus positions by a focusing method.
In an ultrasonic doppler blood flow imaging apparatus provided in an embodiment of the present application, the wavefront propagation direction determining module may include:
a transmission parameter determining unit, configured to determine a transmission parameter of the time-delay focusing method;
a probe parameter determination unit for determining probe parameters of an ultrasonic probe that transmits ultrasonic waves;
the parameter input unit is used for inputting the emission parameters and the probe parameters into the sound field simulation equipment;
the initial wave front propagation direction acquisition unit is used for acquiring an initial wave front propagation direction obtained after the sound field simulation equipment performs transmission simulation according to the transmission parameters and the probe parameters;
and the wave front propagation direction setting unit is used for determining the initial wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected as the wave front propagation direction of the transmitted ultrasonic wave.
In an ultrasonic doppler blood flow imaging apparatus provided in an embodiment of the present application, the wavefront propagation direction determining module may include:
the ultrasonic probe array element determining unit is used for determining ultrasonic probe array elements which face the position to be detected and are used for transmitting ultrasonic waves;
a focus position determination unit for determining a focus position of the delay focusing method;
and the wave front propagation direction determining unit is used for determining the connection direction of the array element of the ultrasonic probe and the corresponding focus position as the wave front propagation direction.
Further, the embodiment of the application also provides electronic equipment. FIG. 7 is a block diagram illustrating an electronic device 20 according to an exemplary embodiment, and nothing in the figure should be taken as a limitation on the scope of use of the present application.
Fig. 7 is a schematic structural diagram of an electronic device 20 according to an embodiment of the present disclosure. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input output interface 25, and a communication bus 26. Wherein the memory 22 is used for storing a computer program, and the computer program is loaded and executed by the processor 21 to implement the relevant steps in the ultrasonic doppler blood flow imaging method disclosed in any of the foregoing embodiments. In addition, the electronic device 20 in the present embodiment may be specifically a server.
In this embodiment, the power supply 23 is configured to provide a working voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and an external device, and a communication protocol followed by the communication interface is any communication protocol applicable to the technical solution of the present application, and is not specifically limited herein; the input/output interface 25 is configured to obtain external input data or output data to the outside, and a specific interface type thereof may be selected according to specific application requirements, which is not specifically limited herein.
In addition, the storage 22 is used as a carrier for resource storage, and may be a read-only memory, a random access memory, a magnetic disk or an optical disk, etc., and the resources stored thereon may include an operating system 221, a computer program 222, video data 223, etc., and the storage may be a transient storage or a permanent storage.
The operating system 221 is used for managing and controlling each hardware device and the computer program 222 on the electronic device 20, so as to realize the operation and processing of the processor 21 on the mass video data 223 in the memory 22, and may be Windows Server, Netware, Unix, Linux, and the like. The computer program 222 may further include a computer program that can be used to perform other specific tasks in addition to the computer program that can be used to perform the abnormal display detection method performed by the electronic device 20 disclosed in any of the foregoing embodiments. Data 223 may include various data collected by electronic device 20.
Further, an embodiment of the present application further provides an ultrasonic doppler blood flow imager, as shown in fig. 8, including an ultrasonic probe and an ultrasonic host, where the ultrasonic probe includes N ultrasonic transducer groups for emitting ultrasonic waves; the ultrasonic host comprises a probe connector connected with the ultrasonic probe, an ultrasonic transmitting circuit for transmitting ultrasonic waves, an ultrasonic receiving circuit for receiving echo information corresponding to the ultrasonic waves, an ultrasonic scanning control unit for controlling the ultrasonic transmitting circuit and the ultrasonic receiving circuit, an ultrasonic imaging system, a man-machine interaction module and the electronic equipment provided by the embodiment of the application.
The ultrasonic Doppler blood flow imaging method provided by the application is realized by the ultrasonic host machine through electronic equipment, and comprises the following steps: determining the propagation direction of the transmitted ultrasonic wave passing through the position to be detected, wherein the transmitted ultrasonic wave is the ultrasonic wave transmitted by a time delay focusing method; taking the wave front propagation direction as a receiving beam forming direction of echo information corresponding to the transmitted ultrasonic wave; according to the receiving beam synthesis direction, carrying out receiving beam synthesis on the echo information corresponding to the position to be detected to obtain a receiving beam synthesis scanning line; and calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning lines.
The human-computer interaction module realizes the control of the user on the ultrasonic Doppler blood flow imager, for example, the user can input a control instruction for controlling an ultrasonic focusing and transmitting method through the human-computer interaction module, and then the human-computer interaction module controls the ultrasonic probe to carry out ultrasonic focusing and transmitting according to the control instruction through the ultrasonic imaging system, the ultrasonic scanning control unit and the ultrasonic transmitting circuit.
Of course, the structure and function of the ultrasonic doppler blood flow imager provided by the present application can be correspondingly expanded according to actual requirements, and the present application is not specifically limited herein.
Further, an embodiment of the present application also discloses a storage medium, in which a computer program is stored, and when the computer program is loaded and executed by a processor, the steps of the ultrasonic doppler blood flow imaging method disclosed in any of the foregoing embodiments are implemented.
For a description of a relevant part in the ultrasonic doppler blood flow imaging apparatus, the electronic device, and the computer readable storage medium provided in the embodiment of the present application, please refer to a detailed description of a corresponding part in the ultrasonic doppler blood flow imaging method provided in the embodiment of the present application, which is not described herein again. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An ultrasonic doppler blood flow imaging method, comprising:
determining the wave front propagation direction of transmitted ultrasonic waves passing through a position to be detected, wherein the transmitted ultrasonic waves are ultrasonic waves transmitted by a focusing method;
taking the wavefront propagation direction as a receive beamforming direction;
according to the receiving beam forming direction, carrying out receiving beam forming on the echo information corresponding to the position to be detected to obtain a receiving beam forming scanning line;
and calculating blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning line.
2. The method of claim 1, wherein prior to determining the direction of propagation of the wavefront of the transmitted ultrasound waves through the location to be examined, further comprising:
determining a preset number of focus positions in other positions except the position to be detected;
and transmitting ultrasonic waves to each focus position by the focusing method, and repeatedly transmitting the ultrasonic waves to each focus position for a preset time, wherein the preset time is more than or equal to 2.
3. The method of claim 2, wherein said transmitting ultrasound waves to each of said focal positions by said focusing method comprises:
and sequentially transmitting ultrasonic waves to each focus position by the focusing method.
4. The method of claim 2, wherein said transmitting ultrasound waves to each of said focal positions by said focusing method comprises:
transmitting ultrasonic waves to the respective focus positions simultaneously by the focusing method.
5. The method according to any one of claims 1 to 4, wherein said determining the direction of propagation of the wave front of the transmitted ultrasound waves passing through the site to be examined comprises:
determining the transmitting parameters of the time delay focusing method;
determining probe parameters of an ultrasonic probe which transmits ultrasonic waves;
inputting the emission parameters and the probe parameters into sound field simulation equipment;
acquiring an initial wave front propagation direction obtained after the sound field simulation equipment performs transmission simulation according to the transmission parameters and the probe parameters;
determining the initial wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected as the wave front propagation direction.
6. The method according to any one of claims 1 to 4, wherein said determining the direction of propagation of the wave front of the transmitted ultrasound waves passing through the site to be examined comprises:
determining an ultrasonic probe array element which faces the position to be detected and is used for transmitting ultrasonic waves;
determining a focus position of the time delay focusing method;
and determining the connection direction of the ultrasonic probe array element and the corresponding focus position as the wave front propagation direction.
7. An ultrasonic doppler blood flow imaging device, comprising:
the wave front propagation direction determining module is used for determining the wave front propagation direction of the transmitted ultrasonic wave passing through the position to be detected, wherein the transmitted ultrasonic wave is the ultrasonic wave transmitted by a focusing method;
a receiving beam synthesis direction determining module, configured to use the wavefront propagation direction as a receiving beam synthesis direction;
a receiving beam forming scanning line determining module, configured to perform receiving beam forming on the echo information corresponding to the position to be detected according to the receiving beam forming direction to obtain a receiving beam forming scanning line;
and the blood flow motion parameter determining module is used for calculating the blood flow motion parameters of the position to be detected based on the receiving beam synthesis scanning line.
8. The apparatus of claim 7, further comprising
The focus position determining module is used for determining a preset number of focus positions in other positions except the position to be detected before the wavefront propagation direction determining module determines the wavefront propagation direction of the transmitted ultrasonic wave passing through the position to be detected;
and the first transmitting module is used for transmitting ultrasonic waves to each focus position by the focusing method and repeatedly transmitting preset ultrasonic waves to each focus position, wherein the preset ultrasonic waves are more than or equal to 2.
9. An electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the ultrasound doppler flow imaging method according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the ultrasound doppler flow imaging method according to any one of claims 1 to 6.
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