WO2021217658A1

WO2021217658A1 - Method for processing blood flow vector speed, method for processing spectrum of blood flow, and ultrasonic device

Info

Publication number: WO2021217658A1
Application number: PCT/CN2020/088495
Authority: WO
Inventors: 高迪·阿尔弗雷多; 杜宜纲
Original assignee: 深圳迈瑞生物医疗电子股份有限公司; Sme医学影像诊断中心
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-11-04
Also published as: WO2021219006A1; CN114126495A

Abstract

Disclosed are a method for processing a blood flow vector speed, a method for processing the spectrum of a blood flow, and an ultrasonic device. The method for processing a blood flow vector speed comprises: acquiring a vector speed (201) of a blood flow, which corresponds to a target point, in a target blood flow region (201); determining polar coordinates corresponding to the vector speed in a polar coordinate system on the basis of the magnitude and direction of the vector speed, and determining, on the basis of the magnitude of the vector speed, a target color in which the vector speed needs to be shown at the corresponding polar coordinates (202); and displaying the vector speed in the polar coordinate system on the basis of the polar coordinates and the target color, so as to obtain a vector distribution map (VDM) of the vector speed in the target blood flow region (203). The VDM makes it possible to intuitively show the magnitude and direction of the vector speed in the target blood flow region, thereby enhancing the visualization effect of blood flow speed information.

Description

Blood flow vector velocity and blood flow frequency spectrum processing method and ultrasound equipment

Technical field

The invention relates to the technical field of ultrasonic imaging, in particular to a method for processing blood flow vector velocity and blood flow frequency spectrum, and ultrasound equipment.

Background technique

Vector blood flow imaging can measure the actual size and direction of blood flow velocity. Compared with traditional color Doppler ultrasound, vector blood flow imaging can provide more speed information, especially the actual direction of the speed, which cannot be obtained by traditional color ultrasound and pulse Doppler. The direction of blood flow velocity is very valuable for in-depth study of hemodynamics. Using the direction of the blood flow velocity, it is possible to calculate the degree of dispersion of the blood flow. However, for in-depth analysis of complex blood flow patterns, the current display of blood flow velocity information is not intuitive enough, and the visualization effect needs to be further improved.

Summary of the invention

The embodiment of the present invention provides a method for processing blood flow vector velocity and blood flow spectrum, and an ultrasound device. The obtained vector velocity is displayed in the polar coordinate system in the form of polar coordinates and target color to obtain the vector of the target blood flow area. The velocity vector distribution map VDM; and the vector velocity obtained according to the target spectrum result and the target brightness used to indicate the number of red blood cells with the vector velocity are displayed in the polar coordinate system to obtain the red blood cell distribution map RDM of the target blood flow area; VDM And RDM can display blood flow velocity information more intuitively, thereby improving the visualization effect of blood flow velocity information.

In the first aspect, an embodiment of the present invention provides a method for processing blood flow vector velocity, and the method includes:

Obtain the vector velocity of blood flow corresponding to the target point in the target blood flow area;

Determining the corresponding polar coordinate of the vector speed in a polar coordinate system based on the magnitude and direction of the vector speed, and determining the target color that the vector speed needs to appear in the corresponding polar coordinate based on the magnitude of the vector speed;

The vector velocity is displayed in the polar coordinate system based on the polar coordinates and the target color, and a vector distribution map VDM of the vector velocity of the target blood flow area is obtained.

In a second aspect, an embodiment of the present invention provides a method for processing blood flow vector velocity, the method including:

Determine the corresponding spherical coordinates of the vector speed in a spherical coordinate system based on the magnitude and direction of the vector speed, and determine the target color that the vector speed needs to present in the corresponding spherical coordinates based on the magnitude of the vector speed;

The vector velocity is displayed in the spherical coordinate system based on the spherical coordinates and the target color, and a vector distribution map VDM of the vector velocity of the target blood flow area is obtained.

In a third aspect, an embodiment of the present invention provides a method for processing blood flow spectrum, and the method includes:

Transmit ultrasonic waves to the target blood flow area from at least two different directions, receive ultrasonic echoes of the ultrasonic waves returning through the target blood flow area, and obtain at least two sets of ultrasonic echoes corresponding to the at least two different directions Wave signal

The spectrum results corresponding to the at least two different directions are determined based on the at least two sets of ultrasonic echo signals, and the spectrum results corresponding to each direction include at least one vector velocity component and at least one brightness corresponding to the at least one vector velocity component ；

Synthesize the spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different directions to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and at least one vector velocity. At least one corresponding composite brightness;

Determine the at least one polar coordinate corresponding to the at least one vector speed in the polar coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to present the at least one polar coordinate A target brightness;

The result of displaying the target spectrum in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness, to obtain a red blood cell distribution map RDM of the target blood flow area.

In a fourth aspect, an embodiment of the present invention provides a method for processing blood flow spectrum, and the method includes:

Determining the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals, where the spectral results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component;

Determine the at least one spherical coordinate corresponding to the at least one vector speed in the spherical coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to present the at least one spherical coordinate A target brightness;

Based on the at least one spherical coordinate and the at least one target brightness, the result of displaying the target spectrum in the spherical coordinate system obtains the red blood cell distribution map RDM of the target blood flow area.

In a fifth aspect, an embodiment of the present invention provides an ultrasonic device, the ultrasonic device includes: a probe, a transmitting circuit, a receiving circuit, a processor, and a display;

The transmitting circuit is used to excite the probe to transmit ultrasonic waves to the target blood flow area;

The receiving circuit is configured to control the probe to receive the ultrasonic echo of the ultrasonic wave returned through the target blood flow area to obtain an ultrasonic echo signal;

The processor is configured to execute or control the transmitting circuit, the receiving circuit, or the display to perform the method according to the first aspect or the second aspect.

In a sixth aspect, an embodiment of the present invention provides an ultrasonic device, the ultrasonic device includes: a probe, a transmitting circuit, a receiving circuit, a processor, and a display;

The transmitting circuit is used to excite the probe to transmit ultrasonic waves to the target blood flow area from at least two different directions;

The receiving circuit is configured to control the probe to receive the ultrasonic echo of the ultrasonic wave returned through the target blood flow area, and obtain at least two sets of ultrasonic echo signals corresponding to the at least two different directions;

The processor is configured to execute or control the transmitting circuit, the receiving circuit, or the display to perform the method according to the third aspect or the fourth aspect.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program causes a computer to execute the first aspect or the second aspect, the third aspect, or the fourth aspect. Methods.

In an eighth aspect, embodiments of the present application provide a computer program product. The computer program product includes a non-transitory computer-readable storage medium storing a computer program. The computer is operable to cause the computer to execute the first aspect or the second aspect. Or the method of the third or fourth aspect.

It can be seen that, in the embodiment of the present application, the obtained vector velocity is displayed in the polar coordinate system in the form of polar coordinates and target color to obtain the vector distribution map VDM of the vector velocity of the target blood flow area; The resultant vector speed and the target brightness used to indicate the number of red blood cells with the vector speed are displayed in the polar coordinate system, and the red blood cell distribution map RDM of the target blood flow area is obtained; the VDM intuitively displays the size and the vector speed of the target blood flow area Direction, RDM intuitively displays the size and direction of the blood flow velocity in the two-dimensional direction of the target blood flow area, and uses the brightness to indicate the number of red blood cells with the same blood flow velocity, thereby improving the visualization of blood flow velocity information.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained from these drawings.

Figure 1 is an ultrasound device provided by an embodiment of the present application;

2A is a schematic flowchart of a method for processing blood flow vector velocity according to an embodiment of the present application;

2B is a schematic diagram of the direction of a vector velocity provided by an embodiment of the present application;

2C is a schematic diagram of the magnitude of a vector speed provided by an embodiment of the present application;

FIG. 2D is a schematic diagram of a display of a VDM provided by an embodiment of the present application;

FIG. 2E is a schematic diagram showing the display of three types of blood flow VDM provided by the embodiment of the present application; FIG.

2F is a schematic diagram of a turbulence index provided by an embodiment of the present application;

2G is a schematic diagram of a quadrant and area division provided by an embodiment of the present application;

2H is a schematic diagram of a first weight setting provided by an embodiment of the present application;

2I(a) and 2I(b) are schematic diagrams of a second weight setting provided by an embodiment of the present application;

FIG. 2J is a schematic diagram of setting the first weight and the second weight according to an embodiment of the present application;

3 is a schematic flowchart of a method for processing blood flow vector velocity according to an embodiment of the present application;

4A is a schematic flowchart of a blood flow spectrum processing method provided by an embodiment of the present application;

FIG. 4B is a schematic diagram of a spectrum result provided by an embodiment of the present application;

4C and 4D are schematic diagrams of a vector velocity component synthesis provided by an embodiment of the present application;

FIG. 4E is a schematic diagram of an RDM provided by an embodiment of the present application;

FIG. 4F is a schematic diagram of an RDM provided by an embodiment of the present application.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only These are a part of the embodiments of this application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the protection scope of this application.

Detailed descriptions are given below.

The terms "first", "second", "third" and "fourth" in the specification and claims of the application and the drawings are used to distinguish different objects, rather than describing a specific order . In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

The reference to "embodiments" herein means that a specific feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art clearly and implicitly understand that the embodiments described herein can be combined with other embodiments.

The embodiments of the present application will be described below in conjunction with the drawings.

Fig. 1 is an ultrasonic device provided by an embodiment of the present application. When the ultrasound device is used to display the vector distribution map (Vectors Distribution Map, VDM) of the vector velocity, the ultrasound device can also be called a vector distribution map display device; Cells Distribution Map (RDM) when displaying, the ultrasound device can also be called a red blood cell distribution map display device;

The ultrasound device 10 may include a probe 100, a transmitting circuit 101, a transmitting/receiving selection switch 102, a receiving circuit 103, a processor 104, and a display 105.

Wherein, when the ultrasound device 10 is used to display the VDM of the vector velocity, the processor 104 is used to obtain the vector velocity of the blood flow corresponding to the target point in the target blood flow area; determine the vector velocity based on the magnitude and direction of the vector velocity The corresponding polar coordinate in the polar coordinate system, and the target color that the vector speed needs to present in the corresponding polar coordinate is determined based on the magnitude of the vector speed; the display 105 is controlled in the polar coordinate system based on the polar coordinate and the target color The vector velocity is displayed, and the VDM of the vector velocity of the target blood flow area is obtained.

It can be seen that in the embodiment of this application, the obtained vector velocity is displayed in the polar coordinate system in the form of polar coordinates and target color, and the VDM of the vector velocity of the target blood flow area is obtained, and the VDM intuitively displays the target blood flow area The magnitude and direction of the vector velocity, thereby improving the visualization of blood flow velocity information.

In a possible implementation, the polar coordinate includes a polar angle and a polar diameter, the polar angle is the angle between the direction of the blood flow vector velocity corresponding to the polar coordinate and the reference direction, and the polar angle is used to represent the polar The direction of the vector velocity of the blood flow corresponding to the coordinate, and the polar diameter is used to indicate the magnitude of the vector velocity of the blood flow corresponding to the polar coordinate.

In a possible implementation, the vector velocity is calculated based on at least one of the following methods: based on the speckle tracking method, based on the transverse wave oscillation method, and based on the multi-angle deflection transmitting and/or receiving method.

In a possible implementation manner, in terms of determining, based on the magnitude of the vector velocity, the target color that the vector velocity needs to present in the corresponding polar coordinates, the processor 104 is specifically configured to: if the magnitude of the vector velocity is greater than or equal to the first A threshold, it is determined that the target color of the vector velocity in the corresponding polar coordinates is red; if the magnitude of the vector velocity is less than the first threshold and greater than or equal to the second threshold, it is determined that the vector velocity is at the corresponding extreme. The target color that the coordinate needs to present is orange; and if the magnitude of the vector velocity is less than the second threshold, it is determined that the target color that the vector velocity needs to appear in the corresponding polar coordinate is green.

In a possible implementation, after displaying the vector velocity in the polar coordinate system based on the polar coordinates and the target color, and obtaining the vector distribution map VDM of the vector velocity of the target blood flow area, the processor 104 further Used to determine the number of the first vector and the number of the second vector, the number of the first vector is the number of the vector velocity contained in the first target polar angle range in the VDM, and the number of the second vector is the number of the vector speed in the VDM The number of vector velocities that are not included in the first target polar angle range; the turbulence index of the target blood flow area is determined based on the number of the first vector and the number of the second vector.

In a possible implementation, the first target polar angle range is determined based on the blood vessel trend and blood flow condition of the target blood flow area, or the first target polar angle range is based on at least the vector included in the VDM It is determined by the sum of the horizontal components of the speed in the reference direction and the sum of the vertical components of the vector speed included in the VDM in the reference direction.

In a possible implementation, the polar coordinate system is divided into four quadrants. The four quadrants are the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant. The first quadrant has a polar angle greater than Or the area equal to 0° and less than 90°, the second quadrant is the area where the polar angle is greater than or equal to 90° and less than 180°, and the third quadrant is the area where the polar angle is greater than or equal to 180° and less than 270°, the The fourth quadrant is the area where the polar angle is greater than or equal to 270° and less than 360°; the first target polar angle range is the polar angle range included in one of the four quadrants or two adjacent quadrants, the non-first The target polar angle range is the polar angle range included in the other quadrants of the four quadrants.

In a possible implementation, the processor 104 is further configured to divide the polar coordinate system into P quadrants according to the polar angle range, where P is a positive integer; and determine the P quadrants based on the second target polar angle range. The first weight, where the greater the difference between the polar angle corresponding to the quadrant and the second target polar angle range, the greater the first weight; the first weight corresponding to the vector velocity included in the VDM is determined based on the first weight of the P quadrants The target weight; the circle vector score of the target blood flow area is determined based on the first target weight, and the circle vector score is used to characterize the degree of turbulence of the blood flow.

In a possible implementation manner, the processor 104 is further configured to divide each of the P quadrants into Q regions according to the polar diameter range to obtain P×Q regions, where Q is a positive integer; The second target polar angle range and the polar diameter range determine the second weight of the P×Q regions, where the larger the polar diameter corresponding to the region, the greater the second weight; based on the second weight of the P×Q regions Determine the second target weight corresponding to the vector velocity included in the VDM;

In terms of determining the circle vector score of the target blood flow region based on the first target weight, the processor 104 is specifically configured to determine the circle vector score of the target blood flow region based on the first target weight and the second target weight.

In a possible implementation, the second target polar angle range is determined based on the blood vessel trend and blood flow condition of the target blood flow area, or the second target polar angle range is based on at least the vector included in the VDM Determined by the sum of the horizontal components of the speed in the reference direction and the sum of the vertical components of the vector speed included in the VDM in the reference direction.

In a possible implementation manner, in terms of dividing the polar coordinate system into P quadrants according to the polar angle range, and dividing each of the P quadrants into Q regions according to the polar radius range, the processor 104 , Specifically used to divide the VDM into 8 quadrants equally based on the polar angle; divide each of the 8 quadrants into multiple regions along the direction of the polar diameter, and the multiple regions include successively along the direction away from the origin The first area, the second area, and the third area are arranged, the magnitude of the vector velocity in the first area is smaller than the magnitude of the vector velocity in the second area, and the magnitude of the vector velocity in the second area is smaller than the third area. The magnitude of the vector velocity in the area.

In a possible implementation, the eight quadrants are the first quadrant, the second quadrant, the third quadrant, the fourth quadrant, the fifth quadrant, the sixth quadrant, the seventh quadrant, and the eighth quadrant. The quadrant is the area where the polar angle is greater than or equal to 0° and less than 45°, the second quadrant is the area where the polar angle is greater than or equal to 45° and less than 90°, and the third quadrant is the area where the polar angle is greater than or equal to 90° and less than 135 ° area, the fourth quadrant is the area where the polar angle is greater than or equal to 135° and less than 180°, the fifth quadrant is the area where the polar angle is greater than or equal to 180° and less than 225°, and the sixth quadrant is the area where the polar angle is greater than For the area equal to or equal to 225° and less than 270°, the seventh quadrant is an area having a polar angle greater than or equal to 270° and less than 315°, and the eighth quadrant is an area having a polar angle or equal to or greater than 315° and less than 360°.

Wherein, when the ultrasound device 10 is used to display the VDM of the vector velocity, the processor 104 is used to obtain the vector velocity of the blood flow corresponding to the target point in the target blood flow area; determine the vector velocity based on the magnitude and direction of the vector velocity The corresponding spherical coordinates in the spherical coordinate system, and the target color that the vector speed needs to present in the corresponding spherical coordinates are determined based on the magnitude of the vector speed; the vector is displayed in the spherical coordinate system based on the spherical coordinates and the target color Velocity, the VDM of the vector velocity of the target blood flow area is obtained.

It can be seen that in the embodiment of this application, the obtained vector velocity is displayed in the spherical coordinate system in the form of spherical coordinates and target color, and the VDM of the vector velocity of the target blood flow area is obtained, and the VDM intuitively displays the target blood flow area The magnitude and direction of the vector velocity, thereby improving the visualization of blood flow velocity information.

Wherein, when the ultrasonic device 10 is used to display RDM, the transmitting circuit 101 is used to excite the probe 100 to transmit ultrasonic waves to the target blood flow area from at least two different directions;

The receiving circuit 103 is configured to control the probe 100 to receive the ultrasonic echo of the ultrasonic wave returned through the target blood flow area, and obtain at least two sets of ultrasonic echo signals corresponding to the at least two different directions;

The processor 104 is configured to determine spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals, and the spectral results corresponding to each direction include at least one velocity component and at least one corresponding to the at least one velocity component. A brightness; combining the spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different directions to obtain a target spectrum result, the target spectrum result including at least one vector velocity and the at least one vector velocity Corresponding at least one synthetic brightness; determining the at least one polar coordinate corresponding to the at least one vector speed in the polar coordinate system based on the magnitude and direction of the at least one vector speed, and taking the at least one synthetic brightness as the at least one polar coordinate required The displayed at least one target brightness; based on the at least one polar coordinate and the at least one target brightness, the display 105 is controlled to display the target spectrum result in the polar coordinate system to obtain the red blood cell distribution map RDM of the target blood flow area.

It can be seen that in the embodiment of this application, the vector velocity obtained according to the target spectrum result and the target brightness used to indicate the number of red blood cells with the vector velocity are displayed in the polar coordinate system to obtain the RDM of the target blood flow area. Visually display the size and direction of the blood flow velocity in the two-dimensional direction of the target blood flow area, and use the brightness to indicate the number of red blood cells with the same blood flow velocity, thereby improving the visualization of blood flow velocity information.

In a possible implementation, the polar coordinate includes a polar angle and a polar diameter, the polar angle is the angle between the direction of the blood flow vector velocity corresponding to the polar coordinate and the reference direction, and the polar angle is used to represent the polar The direction of the vector velocity of the blood flow corresponding to the coordinate, the polar diameter is used to indicate the magnitude of the vector velocity of the blood flow corresponding to the polar coordinate, and the brightness is positively correlated with the number of red blood cells.

In a possible implementation manner, in terms of determining the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals, the processor 104 is specifically configured to: Do wall filtering in the direction to obtain at least two sets of ultrasonic echo signals after filtering. The signal-to-noise ratio of the at least two sets of ultrasonic echo signals after filtering is higher than the signal-to-noise ratio of the at least two sets of ultrasonic echo signals before filtering; The latter at least two sets of ultrasonic echo signals are Fourier transformed to obtain at least two spectral results corresponding to different directions.

In a possible implementation manner, in terms of displaying the target spectrum result in the polar coordinate system, the processor 104 is specifically configured to display the target spectrum result in gray scale in the polar coordinate system; or based on the target spectrum result Corresponding grayscale value, using pseudo-color to display the target spectrum result.

In a possible implementation manner, the vector velocities in different directions in the target spectrum result are displayed in different colors.

In a possible implementation manner, after displaying the target spectrum result in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness to obtain the RDM of the target blood flow area, the processor 104 further uses In determining the blood flow parameter based on the RDM, the blood flow parameter includes at least one of the following: Maximum systolic velocity (Peak Systolic Velocity, PSV), End Diastolic Velocity (EDV), Pulsatility Index (Pulsatility Index, PI), Resistance Index (Resistance Index, RI).

In an embodiment of the present application, the aforementioned display 105 of the ultrasonic device 10 may be a touch display screen, a liquid crystal display screen, etc., or may be an independent display device such as a liquid crystal display or a television independent of the ultrasonic device 10. It can be a display screen on an electronic device such as a mobile phone, a tablet computer, and so on.

In practical applications, the processor 104 may be a specific integrated circuit (Application Specific Integrated Circuit, ASIC), a digital signal processor (Digital Signal Processor, DSP), a digital signal processing device (Digital Signal Processing Device, DSPD), and a programmable logic At least one of a device (Programmable Logic Device, PLD), a Field Programmable Gate Array (FPGA), a Central Processing Unit (CPU), a controller, a microcontroller, and a microprocessor, Thereby, the processor 104 can execute the corresponding steps of the ultrasound image processing method in each embodiment of the present application.

The memory 106 may be a volatile memory (volatile memory), such as a random access memory (Random Access Memory, RAM); or a non-volatile memory (non-volatile memory), such as a read only memory (Read Only Memory, ROM) , Flash memory (flash memory), hard disk (Hard Disk Drive, HDD) or solid-state drive (Solid-State Drive, SSD); or a combination of the above types of memory, and provide instructions and data to the processor 104.

It should be noted that, for the specific implementation of the above device side, refer to the following method test.

2A is a schematic flowchart of a method for processing blood flow vector velocity according to an embodiment of the present application. This method is applied to ultrasound equipment. The method of this embodiment includes but is not limited to the following steps:

Step 201: Obtain the vector velocity of the blood flow corresponding to the target point in the target blood flow area.

Among them, the target blood flow region can be a region of interest (Region Of Interest, ROI), or a non-interest region, and can also include both ROI and non-ROI; the shape of the target blood flow region can be a rectangle or a circle , Triangle, trapezoid, etc., are not limited here.

Among them, the target point can be one, two, or more, and each target point corresponds to a vector velocity.

Step 202: Determine the corresponding polar coordinate of the vector speed in the polar coordinate system based on the magnitude and direction of the vector speed, and determine the target color that the vector speed needs to appear in the corresponding polar coordinate based on the magnitude of the vector speed.

Wherein, the direction corresponding to the angle with the polar angle of 0 in the polar coordinate system may be the reference direction.

For example, if the magnitude of the vector velocity is R and the direction of the vector velocity is the angle θ with the reference direction, the polar coordinates are (R, θ).

Among them, the magnitude of the vector velocity corresponds to the target color one-to-one, and the target color can be, for example, red, orange, yellow, green, cyan, blue, purple, etc., which are not limited here. As shown in Figure 2B and Figure 2C, Figure 2B is a schematic diagram of a vector velocity direction provided by an embodiment of the present application. The direction of the vector velocity is represented by a polar angle θ. Schematic diagram of the magnitude. The distance from the coordinate point of the vector velocity in the polar coordinate system to the center of the circle is the magnitude of the vector velocity.

Step 203: Display the vector velocity in the polar coordinate system based on the polar coordinates and the target color, and obtain the VDM of the vector velocity of the target blood flow area.

Among them, the VDM can be displayed frame by frame, and each frame of VDM corresponds to a moment, and the VDM is displayed and updated in real time, so that the blood flow morphology analysis of the target blood flow area can be performed through the VDM frame by frame; VDM also It can be the display of blood flow velocity information in a certain period of time, which includes the synthesis of velocity vectors of at least one frame. The period of time can be, for example, half a cardiac cycle, one-third cardiac cycle, one cardiac cycle, etc., There is no limitation here.

In a possible implementation manner, the vector velocity is calculated based on at least one of the following methods: based on the speckle tracking method, based on the transverse wave oscillation method, and based on the multi-angle deflection transmitting and/or receiving method.

As an example, the vector velocity can be obtained based on the vector blood flow imaging method of spot tracking. Among them, the absolute difference summation can be used to realize speckle tracking. Among them, it can also be calculated based on plane wave emission and spot tracking methods.

As an example, the vector velocity can be obtained by the vector blood flow imaging method based on the transverse wave oscillation method. Among them, the longitudinal velocity is obtained by the traditional calculation method based on the Doppler principle, the lateral velocity is calculated by the ultrasonic sound field that generates the lateral oscillation and then based on the autocorrelation method, and then the lateral and longitudinal velocities are combined to obtain the vector velocity.

As an example, the vector velocity can be obtained by means of multi-angle deflection transmission and/or reception. Each angle is calculated using the traditional Doppler principle to obtain the velocity component of the angle. The speed measurement results of multiple different angles are combined to obtain the actual speed size and direction, that is, the vector speed.

In a possible implementation manner, determining the target color that the vector speed needs to present in the corresponding polar coordinates based on the magnitude of the vector velocity includes: if the magnitude of the vector velocity is greater than or equal to the first threshold, determining The target color of the vector velocity in the corresponding polar coordinates is red; if the magnitude of the vector velocity is less than the first threshold and greater than or equal to the second threshold, it is determined that the vector velocity needs to be presented in the corresponding polar coordinates. The target color is orange; and if the magnitude of the vector speed is less than the second threshold, it is determined that the target color that the vector speed needs to appear in the corresponding polar coordinates is green.

Wherein, a method for determining the first threshold and the second threshold is: determining the magnitude of all vector velocities included in the target blood flow area; determining the maximum value from the magnitude of all vector velocities included in the target blood flow area And a minimum value; the first threshold value and the second threshold value are determined based on the maximum value and the minimum value.

Further, a specific implementation manner of determining the first threshold and the second threshold based on the maximum value and the minimum value is: quoting the difference between the maximum value and the minimum value and 3 to obtain the first interval value; The sum of the minimum value and the first interval value is used to obtain the second threshold; the sum of the second threshold and the first interval value is determined to obtain the first threshold.

For example, as shown in Fig. 2D, Fig. 2D is a schematic diagram of displaying a VDM provided by an embodiment of the present application. As shown in FIG. 2E, FIG. 2E is a schematic diagram of the display of the VDM with three blood flow patterns provided in an embodiment of the present application. The laminar flow corresponds to the VDM on the left of Figure 2E. The direction of the vector velocity in the target blood flow area is along the direction with a polar angle of 180°; the forward and reverse blood flow corresponds to the VDM in the middle of Figure 2E. The direction of the vector velocity in the blood flow area is not only along the direction of the polar angle of 180°, but also in the direction of the polar angle of 0° to 90° and 270° to 360°; the turbulence corresponds to the VDM on the right of Figure 2E , The direction of the vector velocity in the target blood flow area is along various directions; it can be seen that the VDM can clearly and intuitively display different blood flow patterns with good visibility.

In a possible implementation, after displaying the vector velocity in the polar coordinate system based on the polar coordinates and the target color, and obtaining a vector distribution map VDM of the vector velocity of the target blood flow area, the method further includes:

Determine the number of the first vector and the number of the second vector. The number of the first vector is the number of vector velocities contained in the first target polar angle range in the VDM, and the number of the second vector is the number of the non-inclusive vectors in the VDM. The number of vector velocities included in the first target polar angle range; the turbulence index of the target blood flow area is determined based on the number of the first vector and the number of the second vector.

Among them, the turbulence index (Turbulence Index) is related to the vector velocity density distribution. During the forward flow of blood, it can be laminar or non-laminar. In complex turbulent flow, blood (including red blood cells in the blood) can flow in all directions. The turbulence index is based on this phenomenon.

Further, determining the turbulence index of the target blood flow region based on the number of the first vector and the number of the second vector includes: determining the turbulence index of the target blood flow region based on a turbulence index formula, the first formula being: turbulence Exponent=B/(A+B)×100%, where A is the number of the first vector, and B is the number of the second vector.

In a possible implementation, the first target polar angle range is determined based on the blood vessel trend and blood flow condition of the target blood flow area, or the first target polar angle range is based on at least the vector included in the VDM Determined by the sum of the horizontal components of the speed in the reference direction and the sum of the vertical components of the vector speed included in the VDM in the reference direction.

Further, the first target polar angle range is used to characterize the main direction of blood flow forward, and the first angle range is based at least on the sum of the horizontal components of the vector velocity included in the VDM in the reference direction, and the VDM includes The vector velocity in the reference direction is determined by the sum of the vertical components of the reference direction, including: the first target polar angle range is determined based on the main direction of blood flow forward, and the main direction of blood flow forward is based on the The vector speed included in the VDM is determined by the sum of the horizontal components of the vector speed in the reference direction, the sum of the vertical components of the vector speed in the reference direction and the four-quadrant arctangent function. The sum of the horizontal components of the direction is determined based on the first formula, and the sum of the vertical components of the vector velocity included in the VDM in the reference direction is determined based on the second formula.

Among them, the first formula is:

Among them, the second formula is:

in,

Is the i-th vector velocity included in the VDM, θ _i is the polar angle corresponding to the i-th vector velocity, K is the total number of vector velocities included in the VDM, x _main and y _main are respectively included in the VDM The sum of the horizontal components of the vector velocity in the reference direction and the sum of the vertical components of the vector velocity included in the VDM in the reference direction.

Among them, the four-quadrant arctangent function is:

θ=atan2(y _main , x _main )

Among them, θ is the polar angle returned by the four-quadrant arctangent function. If the return polar angle is between 0 and π, then the direction corresponding to the returned polar angle is taken as the main direction of blood flow θ _main ; if the return polar angle is between -π and 0, then The direction corresponding to the polar angle obtained by the sum of the returned polar angle and 2π is taken as the main direction θ _{main of the} blood flow forward. which is:

In a possible implementation, the polar coordinate system is divided into four quadrants. The four quadrants are the first quadrant, the second quadrant, the third quadrant, and the fourth quadrant. The first quadrant has a polar angle greater than Or the area equal to 0° and less than 90°, the second quadrant is the area where the polar angle is greater than or equal to 90° and less than 180°, and the third quadrant is the area where the polar angle is greater than or equal to 180° and less than 270°, the The fourth quadrant is the area where the polar angle is greater than or equal to 270° and less than 360°; the first target polar angle range is the polar angle range included in one of the four quadrants or two adjacent quadrants, not the first The target polar angle range is the polar angle range included in the other quadrants of the four quadrants.

For example, as shown in FIG. 2F, FIG. 2F is a schematic diagram of a turbulence index provided by an embodiment of the present application. The first target polar angle range is the polar angle range included in the second quadrant Q2 and the third quadrant Q3, and the non-first target polar angle range is the polar angle range included in the first quadrant Q1 and the fourth quadrant Q4, so A= N _Q2 +N _Q3 , B=N _Q1 +N _Q4 , N _Q1 , N _Q2 , N _Q3 and N _Q4 are the vectors included in the first quadrant Q1, the second quadrant Q2, the third quadrant Q3 and the fourth quadrant Q4, respectively The number of speeds.

In a possible implementation, the method further includes:

Divide the polar coordinate system into P quadrants according to the polar angle range, where P is a positive integer;

Determine the first weights of the P quadrants based on the second target polar angle range, where the greater the difference between the polar angles corresponding to the quadrants and the second target polar angle range, the greater the first weight;

Determine the first target weight corresponding to the vector speed included in the VDM based on the first weight of the P quadrants;

The circle vector score of the target blood flow area is determined based on the first target weight, and the circle vector score is used to characterize the degree of turbulence of the blood flow.

Among them, the circular vector score (Circular Vectors Score, CVS) is an automatic scoring system that can determine the shape of blood flow based on the circular vector score.

Wherein, P can be 2, 4, 6, 8, or other values, which are not limited here. For example, if P is 2, then one of the two quadrants corresponds to a polar angle range of 0 to 180°, the other of the two quadrants corresponds to a polar angle range of 180° to 360°, and other angles are also possible Scope. If the second target polar angle range is 0 to 180°, the first weight of the quadrant corresponding to the polar angle range of 0 to 180° is greater than the first weight of the quadrant corresponding to the polar angle range of 180° to 360°.

Among them, the higher the circle vector score, the greater the degree of turbulence; the lower the circle vector score, the smaller the degree of turbulence; further, when the circle vector score is less than or equal to the preset score threshold, the form of blood flow is laminar flow or close to layer flow.

In a possible implementation, the method further includes:

Divide each of the P quadrants into Q regions according to the polar diameter range to obtain P×Q regions, where Q is a positive integer; determine the P×Q regions based on the second target polar angle range and the polar diameter range The second weight of the region, where the larger the polar diameter corresponding to the region, the greater the second weight; and the second target weight corresponding to the vector velocity included in the VDM is determined based on the second weight of the P×Q regions;

Specifically, determining the circle vector score of the target blood flow area based on the first target weight includes:

The circle vector score of the target blood flow area is determined based on the first target weight and the second target weight.

Wherein, Q can be 1, 2, 3, 5, 7, or other values, which are not limited here.

In a possible implementation manner, in terms of dividing the polar coordinate system into P quadrants according to the polar angle range, and dividing each of the P quadrants into Q regions according to the polar radius range, it includes:

The VDM is equally divided into 8 quadrants based on the polar angle; each quadrant of the 8 quadrants is divided into a plurality of regions along the direction of the polar diameter, and the plurality of regions include the first arranged in a direction away from the origin. Area, second area and third area, the magnitude of the vector velocity in the first area is smaller than the magnitude of the vector velocity in the second area, and the magnitude of the vector velocity in the second area is smaller than the magnitude of the vector in the third area The size of the speed.

For example, as shown in FIG. 2G, FIG. 2G is a schematic diagram of a quadrant and area division provided by an embodiment of the present application. In Figure 2G, the VDM is divided into 8 quadrants, the first quadrant S1, the second quadrant S2, the third quadrant S3, the fourth quadrant S4, the fifth quadrant S5, the sixth quadrant S6, the seventh quadrant S7 and the eighth quadrant. S8, each quadrant includes three zones, a low-speed blood flow zone Z1, a medium-speed blood flow zone Z2, and a high-speed blood flow zone Z3.

Among them, based on the above two methods, the main direction of the forward flow of the blood flow can be determined, and then the second target polar angle range can be determined according to the angle difference from the main direction of the forward flow of the blood flow. For example, a polar angle with a difference of ±45° from the polar angle corresponding to the main direction in which blood flows forward is defined as the second target polar angle range.

It should be noted that the specific method for determining the second target polar angle range may refer to the method for determining the first target polar angle range, which will not be described in detail here.

Wherein, the first weight can also be determined according to the angle different from the main direction of the blood flow forward, as shown in FIG. 2H, which is a schematic diagram of a first weight setting provided by an embodiment of the present application. In Fig. 2H, the main direction of blood flow forward is the direction where the polar angle is 180°. The greater the angle difference from the polar angle of 180°, the greater the first weight setting.

Among them, the second weight can be determined according to the magnitude and direction of the vector velocity. As shown in Fig. 2I(a) and Fig. 2I(b), Fig. 2I(a) and Fig. 2I(b) are schematic diagrams of a second weight setting provided by an embodiment of the present application. In Fig. 2I(a), the greater the angle difference from the main direction of blood flow forward, the greater the second weight setting. In Figure 2I(b), the farther the region is from the origin, the larger the corresponding second weight is set. That is, the main direction of blood flow forward is the direction where the polar angle is 180°, the polar angles in the fourth quadrant and the fifth quadrant have the smallest difference from 180°, the second weight is the smallest, and the first zone Z1 is the closest to the origin. The second weight is the smallest, and the first zone Z1 in the fourth quadrant S4 and the fifth quadrant S5 has the smallest second weight. Similarly, the third zone Z3 in the first quadrant S1 and the eighth quadrant S8 has the largest second weight.

In a possible implementation, the first weight of the fourth quadrant and the first weight of the fifth quadrant are the first value; the first weight of the third quadrant and the first weight of the sixth quadrant are the first value. Two values; the first weight of the second quadrant and the first weight of the seventh quadrant are the third value; the first weight of the first quadrant and the first weight of the eighth quadrant are the fourth value;

The second weight of the first area included in the fourth quadrant and the second weight of the first area included in the fifth quadrant are both the first value; the second weight of the second area included in the fourth quadrant, the second weight of the first area The second weight of the second area included in the five quadrants, the second weight of the first area included in the third quadrant, and the second weight of the first area included in the sixth quadrant are all the second value; the fourth quadrant The second weight of the third area included in the fifth quadrant, the second weight of the third area included in the fifth quadrant, the second weight of the second area included in the third quadrant, and the second weight of the second area included in the sixth quadrant. The weight, the second weight of the first area included in the second quadrant, and the second weight of the first area included in the seventh quadrant are all the third value; the second weight of the third area included in the third quadrant, The second weight of the third area included in the sixth quadrant, the second weight of the second area included in the second quadrant, the second weight of the second area included in the seventh quadrant, and the first weight included in the third quadrant. The second weight of the area and the second weight of the first area included in the sixth quadrant are both the fourth value; the second weight of the third area included in the second quadrant and the second weight of the third area included in the seventh quadrant are The second weight, the second weight of the second area included in the first quadrant, and the second weight of the second area included in the eighth quadrant are all fifth values; the second weight of the third area included in the first quadrant The second weight of the third area included in the eighth quadrant is both a sixth value.

In a possible implementation, the first value is 1, the second value is 2, the third value is 3, the fourth value is 4, the fifth value is 5, and the sixth value is 6. As shown in FIG. 2J, FIG. 2J is a schematic diagram of setting the first weight and the second weight according to an embodiment of the present application.

For example, assuming that there is a vector velocity in each area in Figure 2J, when the blood flow pattern is laminar flow, the circle vector score is:

CVS laminar flow = the sum of the first weights corresponding to S4 and S5 + (the sum of the second weights corresponding to Z1, Z2, and Z3 included in S4 and S5 respectively) = 1+1+(1+2+3)×2 =14;

When the blood flow is turbulent, the circle vector score is:

CVS turbulence = S1, S2, S3, S4, S5, S6, S7, and S8 corresponding to the sum of the first weights + (S1, S2, S3, S4, S5, S6, S7, and S8 respectively include Z1, Z2, The sum of the second weight corresponding to Z3) = 1+1+2+2+3+3+4+4+(1+2+3)×2+(2+3+4)×2+(3+4 +5)×2+(4+5+6)×2=104.

It should be noted that P and Q can also take other values. The first weight and the second weight can also have other setting methods. The circle vector score can be obtained based on one frame or multiple frames of blood flow images, or it can be based on one The cardiac cycle or a period of time is calculated, and it is not limited here.

Refer to FIG. 3, which is a schematic flowchart of a method for processing blood flow vector velocity according to an embodiment of the present application. This method is applied to ultrasound equipment. The method of this embodiment includes but is not limited to the following steps:

Step 301: Obtain the vector velocity of the blood flow corresponding to the target point in the target blood flow area.

Step 302: Determine the spherical coordinate corresponding to the vector speed in the spherical coordinate system based on the magnitude and direction of the vector speed, and determine the target color that the vector speed needs to present in the corresponding spherical coordinate based on the magnitude of the vector speed.

Step 303: Display the vector velocity in the spherical coordinate system based on the spherical coordinates and the target color, and obtain the VDM of the vector velocity of the target blood flow area.

It can be seen that in the embodiment of the application, the vector velocity obtained by vector blood flow imaging is displayed in the spherical coordinate system in the form of spherical coordinates and target color, and the VDM of the vector velocity of the target blood flow area is obtained, and the VDM is displayed intuitively. The magnitude and direction of the vector velocity in the target blood flow area, thereby improving the visualization of blood flow velocity information.

It should be noted that the embodiment of this application is an embodiment corresponding to the three-dimensional situation of VDM. In terms of the visualization effect, the user can rotate the spherical coordinate system; or select a section to be observed and display the section in the spherical coordinate system Corresponding vector velocity of blood flow. The possible embodiments are similar to the foregoing method embodiments, please refer to the foregoing method embodiments, which are not described in detail here.

Refer to FIG. 4A, which is a schematic flowchart of a blood flow spectrum processing method provided by an embodiment of the present application. This method is applied to ultrasound equipment. The method of this embodiment includes but is not limited to the following steps:

Step 401: Transmit ultrasonic waves to the target blood flow area from at least two different directions, receive ultrasonic echoes of the ultrasonic waves returning through the target blood flow area, and obtain at least two sets of ultrasonic echoes corresponding to the at least two different directions. Wave signal.

Among them, the ultrasonic echo signal may be, for example, an in-phase/quadrature (In-phase/Quadrature) signal, or other signals, which is not limited here.

Step 402: Determine the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals, each spectral result includes at least one velocity component and at least one brightness corresponding to the at least one velocity component.

For example, if ultrasonic waves are emitted from three different directions of A, B, and C to the target blood flow area, the spectrum results of these three directions can be obtained, as shown in FIG. 4B, which is an example provided by the embodiment of the present application. Schematic diagram of spectrum results.

In an embodiment, steps 401 and 402 can also be summarized as obtaining spectrum results corresponding to at least two different ultrasonic emission directions, and the spectrum results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component. .

Step 403: Synthesize the spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different directions, to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and the at least one vector velocity. Corresponding at least one composite brightness.

Wherein, the direction is the transmitting direction of the ultrasonic wave or the direction of propagation of the ultrasonic wave. The transmitting direction or the direction of propagation (also referred to as the beam direction) is generally defined as the direction perpendicular to the composite wavefront based on the transmitted pulse. The direction of transmitting ultrasonic waves can be understood by referring to this. The at least one vector velocity is obtained by performing angle synthesis of at least one velocity component included in the spectral result corresponding to the first direction and at least one velocity component included in the spectral result corresponding to the second direction, and the at least one synthesized brightness is obtained from the first direction. At least one brightness included in the spectrum result corresponding to one direction is synthesized with at least one brightness included in the spectrum result corresponding to the second direction. The synthesized brightness may be the sum of the two brightnesses or the product of the two brightnesses.

For example, as shown in FIGS. 4C and 4D, FIGS. 4C and 4D are schematic diagrams of a vector velocity synthesis provided by an embodiment of the present application. Synthesize any vector velocity component on the spectrum result in the A direction in Figure 4C and any vector velocity component on the spectrum result in the B direction. As shown in Figure 4D, the pole corresponding to the vector velocity component in the A direction is synthesized. The diameter is a vertical line, and the polar diameter corresponding to the vector velocity component in the B direction is a vertical line. The intersection of the two vertical lines corresponds to the synthesized vector velocity, and the synthesized brightness corresponding to the synthesized vector velocity is in the A direction The brightness corresponding to the vector velocity component on the above is proportional to the brightness corresponding to the vector velocity component in the B direction. For example, the composite brightness may be the sum of the brightness corresponding to the two vector velocity components, and the composite brightness may also be the product of the brightness corresponding to the two vector velocity components.

Step 404: Determine at least one polar coordinate corresponding to the at least one vector speed in the polar coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to be presented in the at least one polar coordinate Target brightness.

Step 405: Display the target spectrum result in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness to obtain the RDM of the target blood flow area.

For example, as shown in FIG. 4E, FIG. 4E is a schematic diagram of an RDM provided by an embodiment of the present application. As shown in Figure 4E, place the vector velocity obtained by combining Figures 4C and 4D in the polar coordinate system to obtain RDM.

It should be noted that the vector velocity component spectra of the A and B directions both contain several different vector velocities, which can be synthesized according to Fig. 4C and Fig. 4D. For example, the spectrum results of the A and B directions both include 10 different vector velocities and Each vector speed corresponds to 1 brightness, then 100 vector speed component synthesis can be performed to obtain 100 vector speeds and their corresponding 100 synthesized brightnesses, and then these 100 vector speeds and 100 synthesized brightnesses are displayed in polar coordinates. In the circle of the system, the synthesized brightness is displayed in gray scale, and the RDM can be obtained. As shown in FIG. 4F, FIG. 4E is a schematic diagram of an RDM provided by an embodiment of the present application, which includes three vector speeds, where the angle θ represents the direction of the vector speed, and R represents the magnitude of the vector speed.

It should also be noted that in addition to the synthesis of vector velocity in the spectrum of the vector velocity components in the A and B directions, the vector velocity in the spectrum results of the A and C directions can also be synthesized, and the vector velocity in the spectrum results of the B and C directions can also be synthesized. Synthesize, then place all the results in a circle, and finally form a two-dimensional RDM in all directions.

It can be seen that in the embodiment of this application, the vector velocity obtained according to the target spectrum result and the target brightness used to indicate the number of red blood cells with the vector velocity are displayed in the polar coordinate system to obtain the RDM of the target blood flow area. It can visually display the size and direction of the blood flow velocity in the two-dimensional direction of the target blood flow area, and use the brightness to indicate the number of red blood cells with the same blood flow velocity, thereby improving the visualization of blood flow velocity information.

In a possible implementation manner, the aspect of determining the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals includes:

Wall filtering is performed on the at least two sets of ultrasonic echo signals along the time direction to obtain the at least two sets of ultrasonic echo signals after filtering, and the SNR of the at least two sets of ultrasonic echo signals after filtering is higher than that of the filtering The signal-to-noise ratio of the at least two sets of ultrasonic echo signals before; Fourier transform is performed on the at least two sets of ultrasonic echo signals after filtering to obtain at least two spectral results corresponding to different directions.

In a possible implementation manner, displaying the target spectrum result in the polar coordinate system includes:

Use gray scale to display the target spectrum result in the polar coordinate system;

Or based on the grayscale value corresponding to the target spectrum result, the target spectrum result is displayed in pseudo color.

In a possible implementation manner, after displaying the target spectrum result in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness to obtain the RDM of the target blood flow area, the method further includes:

The blood flow parameter is determined based on the RDM, and the blood flow parameter includes at least one of the following: PSV, EDV, PI, and RI.

The embodiment of the present application also provides a method for processing blood flow spectrum, which includes:

Transmit ultrasonic waves to the target blood flow area from at least two different directions, receive ultrasonic echoes of the ultrasonic waves returning through the target blood flow area, and obtain at least two sets of ultrasonic echo signals corresponding to the at least two different directions.

The spectrum results corresponding to the at least two different directions are determined based on the at least two sets of ultrasonic echo signals, and the spectrum results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component.

In an embodiment, it can also be summarized as obtaining spectrum results corresponding to at least two different ultrasonic emission directions, and the spectrum results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component.

The spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different directions are synthesized to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and at least one vector velocity corresponding to the at least one vector velocity. A composite brightness.

Determine at least one spherical coordinate corresponding to the at least one vector speed in the spherical coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one target brightness required to be presented by the at least one spherical coordinate.

Based on the at least one spherical coordinate and the at least one target brightness, the target frequency spectrum is displayed in the spherical coordinate system to obtain the red blood cell distribution map RDM of the target blood flow area.

It can be seen that in the embodiment of the present application, the vector velocity and synthesized brightness obtained by synthesizing the spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in different directions are displayed on the ball in the form of spherical coordinates and target brightness. In the coordinate system, the red blood cell distribution map RDM of the target blood flow area is obtained. The RDM in the spherical coordinate system can intuitively display the size and direction of the blood flow velocity in the three-dimensional direction of the target blood flow area, and use the brightness to indicate the same blood flow velocity. The number of red blood cells, thereby improving the visualization of blood flow velocity information.

It should be noted that the embodiment of this application is an embodiment corresponding to the three-dimensional situation of VDM. In terms of the visualization effect, the user can rotate the spherical coordinate system; or select a section to be observed and display the section in the spherical coordinate system The corresponding target spectrum result. The possible embodiments are similar to the foregoing method embodiments, please refer to the foregoing method embodiments, which are not described in detail here.

The embodiment of the present application also provides a computer storage medium. The computer-readable storage medium stores a computer program, and the computer program is executed by the processor to implement part or all of any vector distribution graph processing method described in the above method embodiment. step.

The embodiment of the present application also provides a computer storage medium, the computer-readable storage medium stores a computer program, and the computer program is executed by the processor to implement part or all of any one of the red blood cell distribution map processing methods described in the above method embodiments step.

The embodiments of the present application also provide a computer program product. The computer program product includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to cause a computer to execute any vector described in the above method embodiments. Part or all of the steps of the distribution map processing method.

The embodiments of the present application also provide a computer program product. The computer program product includes a non-transitory computer-readable storage medium storing a computer program. The computer program is operable to make a computer execute any of the red blood cells recorded in the above method embodiments. Part or all of the steps of the distribution map processing method.

It should be noted that for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that this application is not limited by the described sequence of actions. Because according to this application, some steps can be performed in other order or at the same time. Secondly, those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the involved actions and modules are not necessarily required by this application.

In the above-mentioned embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device may be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated into Another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software program modules.

If the integrated unit is implemented in the form of a software program module and sold or used as an independent product, it can be stored in a computer readable memory. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a memory. A number of instructions are included to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the various embodiments of the present application. The memory may include the aforementioned various types or combinations, which will not be repeated here.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by a program instructing relevant hardware. The program can be stored in a computer-readable memory, and the memory can include the aforementioned The various types or combinations of, will not be repeated here.

The embodiments of the application are described in detail above, and specific examples are used in this article to illustrate the principles and implementation of the application. The descriptions of the above embodiments are only used to help understand the methods and core ideas of the application; at the same time, for A person of ordinary skill in the art, based on the idea of this application, will have changes in the specific implementation and scope of application. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

A method for processing blood flow vector velocity, characterized in that the method comprises:

Obtain the vector velocity of blood flow corresponding to the target point in the target blood flow area;

Determining the corresponding polar coordinate of the vector speed in a polar coordinate system based on the magnitude and direction of the vector speed, and determining the target color that the vector speed needs to appear in the corresponding polar coordinate based on the magnitude of the vector speed;

The vector velocity is displayed in the polar coordinate system based on the polar coordinates and the target color, and a vector distribution map VDM of the vector velocity of the target blood flow area is obtained.
The method according to claim 1, wherein the polar coordinates include a polar angle and a polar diameter, and the polar angle is the angle between the direction of the blood flow vector velocity corresponding to the polar coordinates and the reference direction, so The polar angle is used to indicate the direction of the vector velocity of the blood flow corresponding to the polar coordinates, and the polar diameter is used to indicate the magnitude of the vector velocity of the blood flow corresponding to the polar coordinates.
The method according to claim 1, wherein the vector velocity is calculated based on at least one of the following methods: based on a speckle tracking method, based on a transverse wave oscillation method, and based on a multi-angle deflection transmitting and/or receiving method.
The method according to any one of claims 1 to 3, wherein the determining, based on the magnitude of the vector velocity, the target color that the vector velocity needs to appear in the corresponding polar coordinates, comprises:

If the magnitude of the vector velocity is greater than or equal to the first threshold, it is determined that the target color that the vector velocity needs to appear in the corresponding polar coordinate is red;

If the magnitude of the vector velocity is less than the first threshold and greater than or equal to the second threshold, it is determined that the target color that the vector velocity needs to appear in the corresponding polar coordinates is orange; and

If the magnitude of the vector velocity is less than the second threshold, it is determined that the target color that the vector velocity needs to appear in the corresponding polar coordinate is green.
The method according to any one of claims 1 to 3, wherein the vector velocity is displayed in the polar coordinate system based on the polar coordinates and the target color to obtain the target blood flow area After the vector distribution diagram of the vector velocity VDM, the method further includes:

Determine the number of first vectors and the number of second vectors, where the number of first vectors is the number of vector velocities included in the first target polar angle range in the VDM, and the number of second vectors is the The number of vector velocities included in the VDM that is not included in the first target polar angle range;

The turbulence index of the target blood flow area is determined based on the number of the first vectors and the number of the second vectors.
The method according to claim 5, wherein the first target polar angle range is determined based on the blood vessel trend and blood flow condition of the target blood flow area, or the first target polar angle range is at least It is determined based on the sum of the horizontal components of the vector speed included in the VDM in the reference direction, and the sum of the vertical components of the vector speed included in the VDM in the reference direction.
The method according to claim 5 or 6, wherein the polar coordinate system is divided into four quadrants, and the four quadrants are the first quadrant, the second quadrant, the third quadrant and the fourth quadrant, respectively, The first quadrant is an area with a polar angle greater than or equal to 0° and less than 90°, the second quadrant is an area with a polar angle greater than or equal to 90° and less than 180°, and the third quadrant is an area with a polar angle greater than or In the area equal to 180° and less than 270°, the fourth quadrant is an area where the polar angle is greater than or equal to 270° and less than 360°; the first target polar angle range is one or adjacent to the four quadrants The polar angle range included in the two quadrants, and the non-first target polar angle range is the polar angle range included in other quadrants of the four quadrants.
The method according to any one of claims 1-3, wherein the method further comprises:

Divide the polar coordinate system into P quadrants according to the polar angle range, where P is a positive integer;

Determine the first weights of the P quadrants based on the second target polar angle range, where the greater the difference between the polar angles corresponding to the quadrants and the second target polar angle range, the greater the first weight;

Determining the first target weight corresponding to the vector velocity included in the VDM based on the first weights of the P quadrants;

The circle vector score of the target blood flow area is determined based on the first target weight, and the circle vector score is used to characterize the degree of turbulence of the blood flow.
The method according to claim 8, wherein the method further comprises:

Dividing each of the P quadrants into Q regions according to the polar diameter range to obtain P×Q regions, where Q is a positive integer;

Determine the second weight of the P×Q regions based on the second target polar angle range and the polar diameter range, where the larger the polar diameter corresponding to the region, the greater the second weight;

Determining a second target weight corresponding to the vector speed included in the VDM based on the second weight of the P×Q regions;

The determining the circle vector score of the target blood flow area based on the first target weight includes:

The circle vector score of the target blood flow area is determined based on the first target weight and the second target weight.
The method according to claim 8 or 9, wherein the second target polar angle range is determined based on the blood vessel trend and blood flow condition of the target blood flow area, or the second target polar angle range It is determined based on at least the sum of the horizontal components of the vector speed included in the VDM in the reference direction and the sum of the vertical components of the vector speed included in the VDM in the reference direction.
The method according to claim 9, wherein the polar coordinate system is divided into P quadrants according to the polar angle range, and each of the P quadrants is divided into Q according to the polar radius range. Regions, including:

Divide the VDM into 8 quadrants based on the polar angle;

Each of the eight quadrants is divided into a plurality of regions along the direction of the polar diameter, and the plurality of regions includes a first region, a second region, and a third region that are sequentially arranged along a direction away from the origin , The magnitude of the vector velocity in the first area is smaller than the magnitude of the vector velocity in the second area, and the magnitude of the vector velocity in the second area is smaller than the magnitude of the vector velocity in the third area.
The method according to claim 11, wherein the eight quadrants are the first quadrant, the second quadrant, the third quadrant, the fourth quadrant, the fifth quadrant, the sixth quadrant, the seventh quadrant, and the eighth quadrant. Quadrant, the first quadrant is an area with a polar angle greater than or equal to 0° and less than 45°, the second quadrant is an area with a polar angle greater than or equal to 45° and less than 90°, and the third quadrant is a polar angle The area greater than or equal to 90° and less than 135°, the fourth quadrant is the area where the polar angle is greater than or equal to 135° and less than 180°, and the fifth quadrant is the area where the polar angle is greater than or equal to 180° and less than 225° Area, the sixth quadrant is an area with a polar angle greater than or equal to 225° and less than 270°, the seventh quadrant is an area with a polar angle greater than or equal to 270° and less than 315°, and the eighth quadrant is a polar angle Or equal to the area greater than 315° and less than 360°.
A method for processing blood flow vector velocity, characterized in that the method comprises:

Obtain the vector velocity of blood flow corresponding to the target point in the target blood flow area;

Determine the corresponding spherical coordinates of the vector speed in a spherical coordinate system based on the magnitude and direction of the vector speed, and determine the target color that the vector speed needs to present in the corresponding spherical coordinates based on the magnitude of the vector speed;

The vector velocity is displayed in the spherical coordinate system based on the spherical coordinates and the target color, and a vector distribution map VDM of the vector velocity of the target blood flow area is obtained.
A method for processing blood flow spectrum, characterized in that the method includes:

Transmit ultrasonic waves to the target blood flow area from at least two different directions, receive ultrasonic echoes of the ultrasonic waves returning through the target blood flow area, and obtain at least two sets of ultrasonic echoes corresponding to the at least two different directions Wave signal

Determining the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals, where the spectral results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component;

Synthesize the spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different directions to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and at least one vector velocity. At least one corresponding composite brightness;

Determine the at least one polar coordinate corresponding to the at least one vector speed in the polar coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to present the at least one polar coordinate A target brightness;

The result of displaying the target spectrum in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness, to obtain a red blood cell distribution map RDM of the target blood flow area.
A method for processing blood flow spectrum, characterized in that the method includes:

Acquiring spectrum results corresponding to at least two different ultrasonic emission directions, where the spectrum results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component;

The spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different ultrasonic emission directions are synthesized to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and the same as the at least one At least one composite brightness corresponding to the vector speed;

Determine the at least one polar coordinate corresponding to the at least one vector speed in the polar coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to present the at least one polar coordinate A target brightness;

The result of displaying the target spectrum in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness, to obtain a red blood cell distribution map RDM of the target blood flow area.
The method according to claim 14 or 15, wherein the polar coordinates include a polar angle and a polar diameter, and the polar angle is the angle between the direction of the blood flow vector velocity corresponding to the polar coordinates and the reference direction The polar angle is used to indicate the direction of the vector velocity of the blood flow corresponding to the polar coordinates, the polar diameter is used to indicate the magnitude of the vector velocity of the blood flow corresponding to the polar coordinates, and the brightness is related to the number of red blood cells. Positive correlation.
The method according to claim 14, wherein the determining the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals comprises:

Wall filtering is performed on the at least two sets of ultrasonic echo signals along the time direction to obtain the at least two sets of ultrasonic echo signals after filtering, and the SNR of the at least two sets of ultrasonic echo signals after filtering is higher than that of the filtering The signal-to-noise ratio of the at least two sets of ultrasonic echo signals before;

Fourier transform is performed on the filtered at least two sets of ultrasonic echo signals to obtain frequency spectrum results corresponding to at least two different directions.
The method according to any one of claims 14-16, wherein the displaying the target spectrum result in the polar coordinate system comprises:

Displaying the target spectrum result in gray scale in the polar coordinate system;

Or, based on the grayscale value corresponding to the target spectrum result, the target spectrum result is displayed in pseudo color.
The method according to claim 18, wherein the method further comprises:

The vector velocities in different directions in the target spectrum result are displayed in different colors.
The method according to any one of claims 14-16 or 19, wherein the display of the target spectrum result in the polar coordinate system based on the at least one polar coordinate and the at least one target brightness, After obtaining the RDM of the target blood flow area, the method further includes:

The blood flow parameters are determined based on the RDM, and the blood flow parameters include at least one of the following: maximum systolic flow velocity PSV, end-diastolic flow velocity EDV, pulsatility index PI, and resistance index RI.
A method for processing blood flow spectrum, characterized in that the method includes:

Transmit ultrasonic waves to the target blood flow area from at least two different directions, receive ultrasonic echoes of the ultrasonic waves returning through the target blood flow area, and obtain at least two sets of ultrasonic echoes corresponding to the at least two different directions Wave signal

Determining the spectral results corresponding to the at least two different directions based on the at least two sets of ultrasonic echo signals, where the spectral results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component;

Synthesize the spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different directions to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and at least one vector velocity. At least one corresponding composite brightness;

Determine the at least one spherical coordinate corresponding to the at least one vector speed in the spherical coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to present the at least one spherical coordinate A target brightness;

Based on the at least one spherical coordinate and the at least one target brightness, the result of displaying the target spectrum in the spherical coordinate system obtains the red blood cell distribution map RDM of the target blood flow area.
A method for processing blood flow spectrum, characterized in that the method includes:

Acquiring spectrum results corresponding to at least two different ultrasonic emission directions, where the spectrum results corresponding to each direction include at least one velocity component and at least one brightness corresponding to the at least one velocity component;

The spectrum result corresponding to the first direction and the spectrum result corresponding to the second direction in the at least two different ultrasonic emission directions are synthesized to obtain a target spectrum result. The target spectrum result includes at least one vector velocity and the same as the at least one At least one composite brightness corresponding to the vector speed;

Determine the at least one spherical coordinate corresponding to the at least one vector speed in the spherical coordinate system based on the magnitude and direction of the at least one vector speed, and use the at least one synthesized brightness as the at least one required to present the at least one spherical coordinate A target brightness;

Based on the at least one spherical coordinate and the at least one target brightness, the result of displaying the target spectrum in the spherical coordinate system obtains the red blood cell distribution map RDM of the target blood flow area.
An ultrasonic device, characterized in that the ultrasonic device includes: a probe, a transmitting circuit, a receiving circuit, a processor, and a display;

The transmitting circuit is used to excite the probe to transmit ultrasonic waves to the target blood flow area;

The receiving circuit is configured to control the probe to receive the ultrasonic echo of the ultrasonic wave returned through the target blood flow area to obtain an ultrasonic echo signal;

The processor is configured to execute or control the transmitting circuit, the receiving circuit, or the display to execute the method according to any one of claims 1-13.
An ultrasonic device, characterized in that the ultrasonic device includes: a probe, a transmitting circuit, a receiving circuit, a processor, and a display;

The transmitting circuit is used to excite the probe to transmit ultrasonic waves to the target blood flow area from at least two different directions;

The receiving circuit is configured to control the probe to receive the ultrasonic echo of the ultrasonic wave returned through the target blood flow area, and obtain at least two sets of ultrasonic echo signals corresponding to the at least two different directions;

The processor is configured to execute or control the transmitting circuit, the receiving circuit, or the display to execute the method according to any one of claims 14-22.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program is executed by a processor to implement the method according to any one of claims 1-22.