Ultrasonic imaging methods and systems

Abstract

This application provides an ultrasound imaging method and an ultrasound imaging system. The method includes: emitting a first ultrasound wave and a second ultrasound wave to a target tissue and receiving echo signals; acquiring a tissue image of the target tissue based on the echo signal of the first ultrasound wave; determining a target region in the tissue image; acquiring a blood flow image corresponding to the target region based on the echo signal of the second ultrasound wave; superimposing the blood flow image corresponding to the target region and the tissue image corresponding to the target region to obtain a multimodal image; adjusting a first display parameter of the blood flow image to obtain a first target display parameter, and / or adjusting a second display parameter of the tissue image to obtain a second target display parameter; and outputting the target multimodal image based on the first target display parameter and / or the second target display parameter. The multimodal image contains tissue information and blood flow information, and the display effect of the multimodal image can be adjusted so that the user can observe the information that needs to be observed and analyzed.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to an ultrasound imaging method and an ultrasound imaging system. Background Technology

[0002] Ultrasound imaging systems can support different imaging modes. For example, B-mode images can be used to display the structure of human tissues; B-mode images are typically grayscale. They can also display blood flow at different speeds or directions using pseudo-color images of blood flow. However, in related technologies, B-mode images are not displayed when showing pseudo-color images of blood flow, which is detrimental to the user's observation of tissue information and lesion locations. Summary of the Invention

[0003] This application provides an ultrasound imaging method and an ultrasound imaging system that can provide multimodal images containing tissue information and blood flow information of the target tissue of the examined object.

[0004] In a first aspect, embodiments of this application provide an ultrasound imaging method, including:

[0005] The system emits a first ultrasonic wave and a second ultrasonic wave towards the target tissue of the subject being examined, and receives the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave.

[0006] Based on the echo signal of the first ultrasound, a tissue image of the target tissue is obtained;

[0007] Identify the target region in the tissue image;

[0008] Based on the echo signal of the second ultrasound, a blood flow image corresponding to the target area is obtained;

[0009] The blood flow image corresponding to the target region and the tissue image corresponding to the target region are superimposed to obtain a multimodal image. The display parameters of the blood flow image corresponding to the target region in the multimodal image are the first display parameters, and the display parameters of the tissue image corresponding to the target region in the multimodal image are the second display parameters.

[0010] Adjust the first display parameter of the blood flow image corresponding to the target area to obtain the first target display parameter, and / or adjust the second display parameter of the tissue image corresponding to the target area to obtain the second target display parameter;

[0011] Output a multimodal image of the target based on the first target display parameters and / or the second target display parameters.

[0012] Secondly, embodiments of this application provide an ultrasound imaging method, including:

[0013] The system emits a first ultrasonic wave and a second ultrasonic wave towards the target tissue of the subject being examined, and receives the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave.

[0014] Based on the echo signal of the first ultrasound, a tissue image of the target tissue is obtained;

[0015] Identify the target region in the tissue image;

[0016] Based on the echo signal of the second ultrasound, a blood flow image corresponding to the target area is obtained;

[0017] Identify the regions in the blood flow image corresponding to the target region that contain blood flow signals;

[0018] Remove the region in the tissue image corresponding to the region with blood flow signal from the tissue image corresponding to the target region to obtain the tissue image to be superimposed;

[0019] The blood flow image corresponding to the target region is superimposed with the tissue image to be superimposed to obtain a multimodal image. The display parameters of the blood flow image corresponding to the target region in the multimodal image are the first display parameters, and the display parameters of the tissue image corresponding to the target region in the multimodal image are the second display parameters.

[0020] Adjust the first display parameter of the blood flow image corresponding to the target area to obtain the first target display parameter, and / or adjust the second display parameter of the tissue image corresponding to the target area to obtain the second target display parameter;

[0021] Output a multimodal image of the target based on the first target display parameters and / or the second target display parameters.

[0022] Thirdly, embodiments of this application provide an ultrasound imaging method, including:

[0023] Acquire multimodal images of the target tissue of the examined object, the multimodal images including tissue images of the target tissue and blood flow images of the blood flow in the target tissue;

[0024] Adjust the first display parameter of the blood flow image to obtain a first target display parameter, and / or adjust the second display parameter of the tissue image to obtain a second target display parameter;

[0025] Output a multimodal image of the target based on the first target display parameters and / or the second target display parameters.

[0026] Fourthly, embodiments of this application provide an ultrasound imaging system, the ultrasound imaging system comprising:

[0027] Ultrasonic probe;

[0028] A transmitting / receiving circuit is used to excite the ultrasound probe to emit ultrasound waves toward biological tissue and to receive the echo of the ultrasound waves to obtain an ultrasound echo signal.

[0029] A processor for implementing the steps of the aforementioned ultrasound imaging method.

[0030] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to implement the steps of the above-described method.

[0031] This application provides an ultrasound imaging method and an ultrasound imaging system. The ultrasound imaging method includes: emitting a first ultrasound wave and a second ultrasound wave to a target tissue of an object under examination; receiving the echo signals of the first ultrasound wave and the second ultrasound wave; acquiring a tissue image of the target tissue based on the echo signal of the first ultrasound wave; determining a target region in the tissue image; acquiring a blood flow image corresponding to the target region based on the echo signal of the second ultrasound wave; superimposing the blood flow image corresponding to the target region and the tissue image corresponding to the target region to obtain a multimodal image; adjusting a first display parameter of the blood flow image corresponding to the target region to obtain a first target display parameter, and / or adjusting a second display parameter of the tissue image corresponding to the target region to obtain a second target display parameter; and outputting a target multimodal image based on the first target display parameter and / or the second target display parameter. Multimodal images contain tissue information and blood flow information of the target tissue of the examined object. By adjusting the first display parameter of the blood flow image in the multimodal image and / or adjusting the second display parameter of the tissue image in the multimodal image, the display effect of the multimodal image can be adjusted to obtain the corresponding target multimodal image, so that the user can observe the information that needs to be observed and analyzed in the target multimodal image.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the disclosure of the embodiments of this application. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic flowchart of an ultrasound imaging method provided in an embodiment of this application;

[0035] Figure 2 This is a schematic block diagram of an ultrasound imaging system in some embodiments of this application;

[0036] Figure 3 This is a schematic diagram illustrating the acquisition of multimodal images in some embodiments of this application;

[0037] Figure 4 This is a schematic diagram of displaying blood flow images in a target area in related technologies;

[0038] Figure 5 This is a schematic diagram of blood flow and tissue images displayed in related technologies;

[0039] Figure 6 This is a schematic flowchart of an ultrasound imaging method provided in another embodiment of this application;

[0040] Figure 7 This is a schematic diagram of multimodal images in some embodiments of this application;

[0041] Figure 8 This is a schematic diagram of target multimodal images corresponding to different target display parameters in some embodiments of this application;

[0042] Figure 9 This is a schematic flowchart of an ultrasound imaging method provided in another embodiment of this application. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0045] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0046] Please see Figure 1 , Figure 1 This is a schematic flowchart of an ultrasound imaging method provided in an embodiment of this application. The method can be applied in an ultrasound imaging system to obtain multimodal images containing tissue information and blood flow information of the target tissue of the examined object.

[0047] Please refer to Figure 2 An ultrasound imaging system according to one embodiment of this application, Figure 2 A schematic structural block diagram of an ultrasound imaging system 100 according to an embodiment of this application is shown.

[0048] like Figure 2 As shown, the ultrasound imaging system 100 includes at least an ultrasound probe 110, a transmit / receive circuit 112, and a processor 114; it may also include a display 116 and a memory 118. Furthermore, the ultrasound imaging system 100 may also include a beamforming circuit and a transmit / receive selection switch, etc.

[0049] Specifically, the ultrasound probe 110 includes multiple transducer elements. These elements can be arranged in a row to form a linear array, or in a two-dimensional matrix to form a planar array. They can also form a convex array. The transducers are used to emit ultrasonic waves based on excitation electrical signals, or to convert received ultrasonic waves into electrical signals. Therefore, each element can be used to achieve the mutual conversion between electrical pulse signals and ultrasonic waves, thereby enabling the emission of ultrasonic waves to the target area of ​​the object being measured, and also to receive ultrasonic wave echoes reflected back from the tissue. During ultrasound imaging, the transmission and reception sequences can be used to control which transducers are used to emit ultrasonic waves and which are used to receive ultrasonic waves, or to control the transducers to be used in time-slotted manner for emitting ultrasonic waves or receiving ultrasonic wave echoes. Transducers involved in ultrasonic wave emission can be simultaneously excited by electrical signals, thus emitting ultrasonic waves simultaneously; or, transducers involved in ultrasonic beam emission can be excited by several electrical signals with a certain time interval, thus continuously emitting ultrasonic waves with a certain time interval.

[0050] The transmit / receive circuit 112 can be connected to the ultrasound probe 110 via a transmit / receive selection switch. The transmit / receive selection switch, also referred to as a transmit / receive controller, may include a transmit controller and a receive controller. The transmit controller is used to excite the ultrasound probe 110 to transmit ultrasound waves to the target tissue area of ​​the examined object via the transmit circuit; the receive controller is used to receive the ultrasound echoes returning from the target tissue area via the receive circuit through the ultrasound probe 110, thereby obtaining ultrasound echo data. Subsequently, the transmit / receive circuit 112 sends the electrical signal of the ultrasound echo to a beamforming circuit. The beamforming circuit performs focusing delay, weighting, and channel summation on the electrical signal, and then sends the processed ultrasound echo data to the processor 114.

[0051] Optionally, the processor 114 can be implemented by software, hardware, firmware, or any combination thereof. It may use circuitry, one or more application-specific integrated circuits (ASICs), one or more general-purpose integrated circuits, one or more microprocessors, one or more programmable logic devices, or any combination of the foregoing circuits and / or devices, or other suitable circuits or devices, thereby enabling the processor 114 to perform the corresponding steps of the methods in the various embodiments of this specification. Furthermore, the processor 114 can control other components in the ultrasound imaging system 100 to perform desired functions.

[0052] Optionally, the processor 114 processes the received ultrasound echo data to obtain two-dimensional or three-dimensional ultrasound data of the target tissue of the examined object. As an example, the ultrasound probe 110 emits / receives ultrasound waves in a series of scanning planes, which are then integrated by the processor 114 according to their three-dimensional spatial relationships to achieve scanning of the target tissue in three-dimensional space and reconstruction of the three-dimensional image. Finally, after performing some or all image post-processing steps such as denoising, smoothing, and enhancement, the processor 114 obtains the three-dimensional ultrasound data of the target tissue. The processor 114 can obtain the three-dimensional ultrasound data of the entire target tissue or only a portion of the target tissue; the processor 114 is also used to extract standard sections of the target tissue from the three-dimensional ultrasound data. Of course, this is not limited to this; for example, the processor 114 can process the two-dimensional ultrasound data of the target tissue to obtain standard sections of the target tissue.

[0053] The standard cross-sections obtained by processor 114 can be stored in memory or displayed on display 116. Furthermore, processor 114 can also plot three-dimensional ultrasound data and display it on display 116.

[0054] The display 116 is connected to the processor 114. The display 116 can be a touch screen, an LCD screen, or a separate display device such as an LCD screen or a television, independent of the ultrasound imaging system 100. Alternatively, the display 116 can be the screen of an electronic device such as a smartphone or tablet, etc. There can be one or more displays 116. For example, the display 116 may include a main screen and a touch screen; the main screen is primarily used to display ultrasound images, and the touch screen is primarily used for human-computer interaction.

[0055] The display 116 can display the ultrasound images obtained by the processor 114. Furthermore, while displaying the ultrasound images, the display 116 can also provide a graphical user interface for human-machine interaction. One or more controlled objects can be set on the graphical interface, allowing the user to input operation commands using a human-machine interaction device to control these controlled objects and execute corresponding control operations. For example, icons can be displayed on the graphical interface, and the human-machine interaction device can be used to operate these icons to perform specific functions.

[0056] Optionally, the ultrasound imaging system 100 may also include other human-machine interface devices besides the display 116, which are connected to the processor 114. For example, the processor 114 may be connected to the human-machine interface device via an external input / output port, which may be a wireless communication module, a wired communication module, or a combination of both. The external input / output port may also be implemented based on USB, bus protocols such as CAN, and / or wired network protocols.

[0057] The human-computer interaction device may include an input device for detecting user input information. This input information may be, for example, control commands for the timing of ultrasonic wave transmission / reception, operational input commands for drawing points, lines, or boxes on an ultrasonic image, or other types of commands. The input device may include one or a combination of several of the following: a keyboard, mouse, scroll wheel, trackball, mobile input device (such as a mobile device with a touchscreen, a mobile phone, etc.), a multi-function knob, etc. The human-computer interaction device may also include an output device such as a printer.

[0058] The ultrasound imaging system 100 may also include a memory for storing instructions executed by the processor, received ultrasound echoes, ultrasound images, and so on. The memory may be a flash memory card, solid-state memory, hard disk, etc. It may be volatile and / or non-volatile memory, removable memory and / or non-removable memory, etc.

[0059] It should be understood that Figure 2 The components included in the ultrasound imaging system 100 shown are merely illustrative and may include more or fewer components. This application is not limiting in this regard.

[0060] like Figure 1 As shown, the ultrasound imaging method of this application embodiment includes steps S110 to S170.

[0061] Step S110: Emit a first ultrasonic wave and a second ultrasonic wave to the target tissue of the object being examined, and receive the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave.

[0062] The target tissue may include blood flow. The first ultrasound wave and its echo signal can be used to acquire a tissue image of the target tissue, such as a cross-sectional image of the target tissue. The second ultrasound wave and its echo signal can be used to acquire a blood flow image of the blood flow in the target tissue. For example, emitting the first ultrasound wave and receiving its echo signal can be a mode B (brightness mode) scan, and emitting the second ultrasound wave and receiving its echo signal can be a mode C (depth mode) scan, or a blood flow scan.

[0063] For example, a first ultrasound wave can be emitted towards the target tissue and its echo signal received first, followed by the emission of a second ultrasound wave towards the target tissue and the reception of its echo signal; alternatively, a second ultrasound wave can be emitted towards the target tissue and its echo signal received first, followed by the emission of a first ultrasound wave towards the target tissue and the reception of its echo signal. For instance, mode B scanning and blood flow scanning can be interleaved, such as each frame of the scan containing both mode B scanning and blood flow scanning.

[0064] Step S120: Obtain a tissue image of the target tissue based on the echo signal of the first ultrasound.

[0065] For example, a tissue image can be obtained by performing signal processing steps such as signal amplification, analog-to-digital conversion, and beamforming on the echo signal received from the first ultrasound. The tissue image may include, for example, a B-mode ultrasound image.

[0066] For example, a tissue image of the target tissue is acquired at each frame scan time, and the tissue image is updated and displayed. That is, the tissue image can be a tissue image acquired in real time.

[0067] For example, users can adjust the position and angle of the probe based on the real-time displayed tissue image to obtain the desired tissue image, such as a clear image of the tissue structure. Optionally, the ultrasound parameters corresponding to the ultrasound probe array unit can also be adjusted based on the real-time displayed tissue image to obtain the optimal tissue image; the ultrasound parameters may include front-end parameters and / or back-end parameters, wherein the front-end parameters include at least one of the following: scale, frequency, sensitivity, and line density, and the back-end parameters include at least one of the following: wall filtering, gain, frame correlation, smoothing, priority, dynamic range, grayscale spectrum, and speckle noise suppression.

[0068] In some implementations, after determining the tissue image that yields the best results, a second ultrasound wave can be emitted toward the target tissue of the subject, and the echo signal of the second ultrasound wave can be received to perform blood flow scanning and acquire blood flow images; during the blood flow scanning, a B-mode scan can also be performed, and the tissue image can be updated and displayed.

[0069] Step S130: Determine the target region in the tissue image.

[0070] The target region can be an area that needs to be studied in detail, such as an area where fine blood flow needs to be observed; the target region can be called the region of interest (ROI).

[0071] For example, a target region in the tissue image can be determined based on the user's region determination operation, including determining the size and / or location of the target region. See also... Figure 3 Users can select a target area within the tissue image. It should be noted that the target area is not limited to a rectangle; it can also be other shapes, such as a circle, triangle, or hexagon.

[0072] For example, an ultrasound imaging device can automatically determine a target region in the tissue image, for example, it can determine the target region in the tissue image based on a preset machine learning model; for example, it can determine a preset tissue in the tissue image, such as the endometrium, through image recognition; and determine the size and / or location of the target region according to the range of the preset tissue, wherein the target region is the area that includes the preset tissue.

[0073] Step S140: Obtain the blood flow image corresponding to the target area based on the echo signal of the second ultrasound.

[0074] In some implementations, a blood flow image corresponding to the target tissue can be obtained based on the echo signal of the second ultrasound. Then, based on the target region in the tissue image, a blood flow image corresponding to the target tissue can be determined. For example, the blood flow image corresponding to the target region can be cropped from the blood flow image corresponding to the target tissue based on the size and position of the target region in the tissue image.

[0075] In other embodiments, the echo signal corresponding to the target region can be identified in the echo signal of the second ultrasound, and the blood flow image corresponding to the target tissue can be obtained based on the echo signal corresponding to the target region.

[0076] Blood flow images can be pseudo-color images, for example, blood flow images use different colors to represent blood flow at different speeds or in different directions; users can intuitively understand the speed and direction of blood flow in the target tissue through blood flow images.

[0077] In some implementations, please refer to Figure 3After adjusting the tissue image, such as the B-mode image, to the optimal state to obtain a clear tissue structure image, the blood flow image corresponding to the target tissue can be obtained based on the echo signal of the second ultrasound. This ensures that the obtained blood flow image has high-quality structure and detail, so that the blood flow image can better display blood flow information, such as micro-blood flow information, making the details of micro-blood flow easier to identify.

[0078] In some embodiments, the second ultrasound wave emitted towards the target tissue of the subject includes a non-focused wave, preferably a plane wave and / or a divergent wave. Using a non-focused wave to detect the blood flow velocity vector at each target point within the vascular region, compared to line-by-line scanning with a focused wave, allows for a single ultrasound emission to cover the entire vascular region to be detected, increasing the frame rate of blood flow velocity vector imaging and thus enabling the capture of subtle changes in blood flow over a short period. Blood flow images acquired based on the echo signal of the second ultrasound wave can more finely depict minute blood flow patterns, making the details of these patterns easier to identify.

[0079] In some embodiments, the blood flow image includes fast-flowing blood flow and / or slow-flowing blood flow. This application embodiment primarily uses the example of a blood flow image including slow-flowing blood flow (e.g., flow rate below 5 cm / s) for illustration. It should be noted that this application embodiment can adjust the display effect of the multimodal image containing tissue information and blood flow information of the target tissue of the examined object by adjusting the first display parameter of the blood flow image and / or adjusting the second display parameter of the tissue image. For example, it can facilitate the user's observation of slow-flowing fine blood flow in the multimodal image, understanding the location of these fine blood flow streams in the target tissue of the examined object; and / or facilitate the user's observation of tissue information in the multimodal image, achieving the localization of the lesion area.

[0080] For example, step S140, based on the echo signal of the second ultrasound, acquires a blood flow image corresponding to the target area, including: filtering the echo signal of the second ultrasound to remove tissue motion signals from the echo signal and obtaining a blood flow motion signal, wherein the blood flow motion signal includes at least a first blood flow motion signal with a blood flow velocity within the tissue motion velocity range; performing autocorrelation calculation on the blood flow motion signal to obtain blood flow data; and generating a blood flow image corresponding to the target area based on the blood flow data.

[0081] For example, the temporal and spatial characteristics of the echo signal of the second ultrasound are extracted using spatiotemporal wall filtering (such as spatiotemporal adaptive wall filtering), and these characteristics are analyzed to filter out tissue motion signals from the echo signal, thus obtaining blood flow motion signals. The blood flow motion signals may include a first blood flow motion signal (or low-speed motion signal) with a blood flow velocity within the tissue motion velocity range (e.g., blood flow velocity below 5 cm / s), and a second blood flow motion signal (a high-speed motion signal with a velocity higher than the tissue motion velocity range). Spatiotemporal wall filtering can more effectively distinguish slow-moving blood flow from slow tissue motion, retaining slow-moving blood flow signals while filtering out tissue, thereby improving blood flow detection sensitivity and providing better display of slow blood flow. Optionally, when obtaining blood flow motion signals by filtering out tissue motion signals from the echo signals through spatiotemporal wall filtering, the echo signals of the second ultrasound obtained within a preset time period are processed by spatiotemporal wall filtering. The preset time period is, for example, greater than the blood flow scanning time within one frame scanning time. This can improve the filtering effect of spatiotemporal adaptive wall filtering without affecting the scanning frame rate.

[0082] For example, blood flow data obtained by autocorrelation calculation of blood flow motion signals may include at least one of blood flow mean velocity, variance, and energy.

[0083] Autocorrelation calculations, including phase difference analysis algorithms, can estimate the characteristics generated by the Doppler effect into three physical quantities: velocity, energy, and variance. The velocity information obtained from autocorrelation calculations can be mapped to pseudo-color information, and the generated pseudo-color image can be called a Doppler color blood flow image (or velocity image). Similarly, the energy information obtained from autocorrelation estimation can also be mapped to pseudo-color information, and the generated pseudo-color image can be called an energy image. Likewise, the variance information obtained from autocorrelation estimation can also be mapped to pseudo-color information, and the generated pseudo-color image can be called a variance image. The blood flow image in the embodiments of this application may include any one or more of the velocity image, energy image, and variance image.

[0084] In some implementations, signals with velocity or energy less than or equal to a corresponding threshold are mapped to blank or transparent pixels in the blood flow image; or, in other words, pseudo-color pixels in the blood flow image represent the presence of blood flow signals, while blank or transparent pixels represent the absence of blood flow signals.

[0085] Step S150: Overlay the blood flow image corresponding to the target region and the tissue image corresponding to the target region to obtain a multimodal image. The display parameters of the blood flow image corresponding to the target region in the multimodal image are the first display parameters, and the display parameters of the tissue image corresponding to the target region in the multimodal image are the second display parameters.

[0086] like Figure 4 The diagram illustrates a related technique for displaying blood flow images of a target area. Areas within the target area corresponding to areas without blood flow signals are displayed in complete black, meaning no tissue image is shown. Only the blood flow signals from the blood flow image are visible within the target area. This helps highlight information about minute blood flows, making them easier to observe and analyze. However, this display mode does not show tissue information, which is detrimental to the observation of tissue information and lesion location; for example, it cannot provide auxiliary localization of the lesion area. Figure 5 The diagram shown illustrates how blood flow images and tissue images are displayed in related technologies, which is not conducive to users understanding the position of blood flow relative to surrounding tissues.

[0087] Please see Figure 3 The multimodal image in this application embodiment includes a blood flow image corresponding to the target region and a tissue image corresponding to the target region. The tissue image (such as a B-mode image) is used to display the structure of human tissue and can be a grayscale image. The blood flow image (such as a pseudo-color image) is used to display blood flow information; that is, the multimodal image includes tissue information and blood flow information of the target tissue in the target region. The tissue image in the multimodal image can provide background information on the tissue structure so that users can understand the position of blood flow relative to surrounding tissues.

[0088] For example, the size of the blood flow image corresponding to the target region is equal to the size of the tissue image corresponding to the target region, and the position of the blood flow image corresponding to the target region is also aligned with the position of the tissue image corresponding to the target region, so that the tissue image in the multimodal images can accurately provide background information of the tissue structure. Optionally, calibration can also be performed during the image acquisition and processing of the blood flow image and / or the tissue image corresponding to the target region to ensure that the two are perfectly matched.

[0089] In some implementations, the blood flow image corresponding to the target region and the tissue image corresponding to the target region can be two image layers, and a multimodal image is obtained by superimposing the image layers. Of course, it is not limited to this. For example, the blood flow image corresponding to the target region can be superimposed on the target region of the tissue image, and the image in the target region of the obtained image can also be called the multimodal image.

[0090] Obtaining a multimodal image from the blood flow image and the tissue image corresponding to the target region can be referred to as image fusion of the blood flow image and the tissue image corresponding to the target region. It should be noted that image fusion is not limited to the method in step S150; other image fusion methods can also be used to obtain multimodal images.

[0091] For example, in some other embodiments of this application, please refer to Figure 6The multimodal image can be obtained based on the blood flow image corresponding to the target region and the target region corresponding to the target region through steps S151 to S153: Step S151: Determine the region with blood flow signal in the blood flow image corresponding to the target region; Step S152: Remove the region corresponding to the region with blood flow signal in the tissue image corresponding to the target region to obtain the tissue image to be superimposed; Step S153: Superimpose the blood flow image corresponding to the target region with the tissue image to be superimposed to obtain the multimodal image, wherein the display parameters of the blood flow image corresponding to the target region in the multimodal image are the first display parameters, and the display parameters of the tissue image corresponding to the target region in the multimodal image are the second display parameters.

[0092] For example, the blood flow image corresponding to the target region is first converted into a binary image of 0 and 1 to determine the regions in the blood flow image corresponding to the target region that contain blood flow signals; for example, 1 in the binary image represents regions with blood flow signals, and 0 represents regions without blood flow signals. Then, a mask is applied to the tissue image corresponding to the target region based on the binary image to obtain the regions in the tissue image corresponding to the target region that correspond to the regions with blood flow signals; then, the image obtained by subtracting the masked image from the tissue image corresponding to the target region is obtained to obtain the tissue image with the regions corresponding to the regions with blood flow signals removed, which can be called the tissue image to be superimposed.

[0093] In the multimodal image obtained by superimposing the blood flow image corresponding to the target region with the tissue image to be superimposed, interference from the region in the tissue image corresponding to the target region that corresponds to the blood flow image of the target region can be prevented, so as to clearly and accurately represent the blood flow on the target tissue corresponding to the target region.

[0094] In some implementations, the display parameters of the blood flow image corresponding to the target region in the multimodal image obtained in step S150 are the same as the display parameters of the blood flow image corresponding to the target region obtained in step S140, and the display parameters of the tissue image corresponding to the target region in the multimodal image are the same as the display parameters of the blood flow image corresponding to the target region when the target region in the tissue image is determined in step S130.

[0095] like Figure 7 The diagram shown illustrates a multimodal image in some implementations. The multimodal image contains tissue information and blood flow information of the target tissue in the target region, which can facilitate better observation of lesions in blood flow-related tissues. However, the tissue information of the target tissue in the multimodal image can sometimes interfere with the blood flow information, such as making it difficult for users to observe the subtle information of micro-blood flow.

[0096] Step S160: Adjust the first display parameter of the blood flow image corresponding to the target area to obtain the first target display parameter, and / or adjust the second display parameter of the tissue image corresponding to the target area to obtain the second target display parameter.

[0097] In some embodiments, the first target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, and hue; and / or the second target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, and hue. It should be noted that the first target display parameter and the second target display parameter can be the same or different, or partially different. By adjusting the first display parameter of the blood flow image corresponding to the target region and / or adjusting the second display parameter of the tissue image corresponding to the target region, the display effect of the multimodal image can be adjusted. For example, the visibility of the blood flow image corresponding to the target region and / or the visibility of the tissue image corresponding to the target region can be adjusted, or the display intensity of the blood flow image and the tissue image corresponding to the target region can be adjusted. Figure 8 The second display parameters of the tissue images corresponding to the target regions in the five multimodal graphics shown are different, and the corresponding display effects are also different.

[0098] For ease of explanation, the embodiments of this application mainly use the example of adjusting the transparency of the blood flow image corresponding to the target area and / or adjusting the transparency of the tissue image corresponding to the target area.

[0099] For example, the blood flow image and the tissue image corresponding to the target region are two image layers. The visibility of the image layers can be controlled by adjusting their transparency. Typically, the transparency value is between 0 and 1, where 0 represents complete transparency and 1 represents complete opacity. The display intensity of the two images in the target multimodal image can be controlled by adjusting the transparency of the blood flow image and / or the tissue image corresponding to the target region.

[0100] Step S170: Output the target multimodal image according to the first target display parameters and / or the second target display parameters.

[0101] Please see Figure 8 By adjusting the second display parameters of the tissue image corresponding to the target region, the display intensity of the tissue image corresponding to the target region in the target multimodal image can be adjusted, and target multimodal images corresponding to different second target display parameters can be obtained, such as target multimodal images A to target multimodal images E.

[0102] In this process, from target multimodal image A to target multimodal image E, the intensity (or visibility) of the tissue image corresponding to the target region in the target multimodal image increases sequentially. The tissue image corresponding to the target region in target multimodal image A is invisible, that is, the part of target multimodal image A without blood flow signal is displayed as black, which makes it easier to observe the details of micro-blood flow. The intensity of the tissue image corresponding to the target region in target multimodal image E is the strongest. For example, the display parameters of the tissue image corresponding to the target region in target multimodal image E are the same as the display parameters of the blood flow image corresponding to the target region when the target region in the tissue image is determined in step S130. The display effect of the tissue image corresponding to the target region in target multimodal image E is the grayscale display mode of the original tissue image, which makes it easier to observe the lesions of blood flow-related tissues.

[0103] For example, adjusting the transparency of the tissue image corresponding to the target region from 0 to 1 can change the tissue image corresponding to the target region in the target multimodal image from completely transparent to completely opaque, and can obtain the following results: Figure 8 The target multimodal images A to E are shown with different display effects. When the transparency is 0, the tissue image is completely invisible and can be displayed as a preset color such as black, thus obtaining target multimodal image A; when the transparency is 1, the tissue image fully displays the original image, thus obtaining target multimodal image E.

[0104] For example, by adjusting the first display parameter of the blood flow image corresponding to the target region, the display intensity of the blood flow image corresponding to the target region in the target multimodal image can be adjusted, resulting in target multimodal images corresponding to different first target display parameters. For instance, by adjusting the intensity of the blood flow image corresponding to the target region to the lowest level, such as adjusting the transparency of the blood flow image corresponding to the target region to 0, the blood flow image corresponding to the target region becomes completely invisible. In the target multimodal image obtained by overlaying the tissue image corresponding to the target region, the tissue image corresponding to the target region is fully displayed, which facilitates the user's analysis of the tissue image.

[0105] In some embodiments, adjusting the first display parameter of the blood flow image corresponding to the target region to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image corresponding to the target region to obtain a second target display parameter, includes: adjusting the first display parameter of the blood flow image corresponding to the target region to obtain a first target display parameter when a preset trigger is triggered, and / or adjusting the second display parameter of the tissue image corresponding to the target region to obtain a second target display parameter. When the preset trigger is triggered, the corresponding target multimodal image can be obtained by adjusting the first target display parameter and / or adjusting the second display parameter.

[0106] The preset trigger can be at least one of a virtual trigger and a physical trigger; wherein the physical trigger includes, but is not limited to, at least one of the following: a button, a switch, a keyboard, a mouse, a scroll wheel, and a trackball; the virtual trigger includes, for example, at least one of a slider, button, or other interactive element of the preset interactive interface. The virtual trigger and the physical trigger can be triggered according to the user's operation, or the virtual trigger can also be automatically triggered by the ultrasound imaging device when preset conditions are met.

[0107] If the preset trigger is not triggered, the multimodal image obtained in step S150 can be output as the target multimodal image.

[0108] In some implementations, the user can adjust a first display parameter of the blood flow image corresponding to the target region and / or adjust a second display parameter of the tissue image corresponding to the target region. Step S160, adjusting the first display parameter of the blood flow image corresponding to the target region to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image corresponding to the target region to obtain a second target display parameter, may include: adjusting the first display parameter of the blood flow image corresponding to the target region according to the user's parameter adjustment operation to obtain the first target display parameter; and / or adjusting the second display parameter of the tissue image corresponding to the target region according to the user's parameter adjustment operation to obtain the second target display parameter.

[0109] For example, parameter adjustment operations may include operations on preset adjustment components, which include, but are not limited to, at least one of the following: virtual adjustment components and physical adjustment components; wherein physical adjustment components include, but are not limited to, at least one of the following: keyboard, mouse, scroll wheel, trackball; virtual adjustment components include, for example, at least one of the following: slider, button, or other interactive elements of a preset interactive interface.

[0110] For example, during the user's adjustment of the first display parameter and / or the second display parameter, the first target display parameter and / or the second display parameter are updated in real time, and the corresponding target multimodal image is updated according to the real-time updated first target display parameter and / or second display parameter; so that the user can determine whether the updated target multimodal image meets the requirements or achieves the best effect, such as determining whether the blood flow image and tissue image in the target multimodal image have reached the most suitable balance. For example, when it is determined that the updated target multimodal image meets the requirements, the adjustment of the first display parameter and / or the adjustment of the second display parameter can be stopped, and the ultrasound imaging device can also be triggered to store the target multimodal image.

[0111] For example, the parameter adjustment operation includes setting a display level, and at least two of the display levels have different values ​​for at least one first target display parameter, and / or at least one second target display parameter. See also... Figure 8 The target multimodal images corresponding to the five display levels A to E are target multimodal images A to target multimodal image E. Target multimodal image A corresponding to level A does not display the tissue image in the target area (i.e., the tissue image in the target area is displayed in black). The tissue image in target multimodal image E corresponding to level E is the grayscale display mode of the original tissue image.

[0112] For example, setting the display level can include selecting the target display level from the level list, or it can be done by dragging the slider. It should be noted that the number of display levels in this embodiment is not limited; for example, it can include only two display levels, level A and level E. A greater number of display levels allows for more detailed adjustment of the display effect.

[0113] For example, when a preset trigger is activated, the first display parameter of the blood flow image corresponding to the target area can be adjusted according to the user's parameter adjustment operation to obtain a first target display parameter; and / or the second display parameter of the tissue image corresponding to the target area can be adjusted according to the user's parameter adjustment operation to obtain a second target display parameter.

[0114] For example, during the acquisition and display of the multimodal image in step S150, the user can determine whether to adjust the first display parameter and / or the second display parameter as needed. For instance, if the multimodal image displayed after step S150 fails to adequately represent the details of blood flow, the user can trigger a preset trigger to activate the parameter adjustment function, thereby obtaining the corresponding target multimodal image by adjusting the first display parameter and / or the second display parameter. If the preset trigger is not triggered, it prevents accidental operation from degrading the display effect of the multimodal image.

[0115] In other embodiments, the ultrasound imaging system may adaptively adjust a first display parameter of the blood flow image corresponding to the target region, and / or adaptively adjust a second display parameter of the tissue image corresponding to the target region. For example, the ultrasound imaging system may adaptively adjust the first display parameter, and the user may adjust the second display parameter; or the ultrasound imaging system may adaptively adjust the second display parameter, and the user may adjust the first display parameter.

[0116] For example, in step S150, the ultrasound imaging system can adaptively adjust the first display parameters of the blood flow image corresponding to the target region and / or the second display parameters of the tissue image corresponding to the target region, and obtain the multimodal image based on the adaptively adjusted first display parameters and / or second display parameters. Alternatively, in step S150, when outputting the multimodal image, the adaptively adjusted first display parameters and / or second display parameters can be output as recommended or reference values ​​adjusted by the user.

[0117] For example, when a preset trigger is activated, the first display parameter of the blood flow image corresponding to the target region is adaptively adjusted, and / or the second display parameter of the tissue image corresponding to the target region is adaptively adjusted. If the preset trigger is not activated, the multimodal image obtained in step S150 can be output as the target multimodal image.

[0118] For example, step S160 adjusts the first display parameter of the blood flow image corresponding to the target region to obtain a first target display parameter, and / or adjusts the second display parameter of the tissue image corresponding to the target region to obtain a second target display parameter, including: adaptively adjusting the first target display parameter of the blood flow image corresponding to the target region and / or the second target display parameter of the tissue image corresponding to the target region according to preset information, wherein the preset information includes at least one of the following: the size of the target region in the tissue image, blood flow data of the blood flow in the target tissue corresponding to the target region, image features of the tissue image corresponding to the target region, and image features of the blood flow image corresponding to the target region.

[0119] For example, the larger the size of the target region in the tissue image, the more the second target display parameter of the tissue image corresponding to the target region can be adjusted to reduce the intensity of the tissue image in the target multimodal image, thereby reducing interference with the blood flow image in the target multimodal image. Conversely, the slower the blood flow velocity in the target tissue corresponding to the target region, the more the first display parameter of the blood flow image corresponding to the target region can be adjusted to increase the intensity of the blood flow image in the target multimodal image, allowing the user to better observe the details of fine blood flow. When the image characteristics of the tissue image corresponding to the target region determine that the tissue image strongly interferes with the blood flow image, the second target display parameter of the tissue image corresponding to the target region can be adjusted to reduce the intensity of the tissue image in the target multimodal image, thereby reducing interference with the blood flow image in the target multimodal image. When the image characteristics of the blood flow image corresponding to the target region determine that the blood flow image corresponding to the target region is not clear enough, the first display parameter of the blood flow image corresponding to the target region can be adjusted to increase the intensity of the blood flow image in the target multimodal image. Of course, this is not the only possibility; for example, the direction of adjusting the target display parameter can be the opposite of the aforementioned examples.

[0120] In some implementations, the time difference between the reception time of the echo signal corresponding to the blood flow image of the target region and the reception time of the echo signal corresponding to the tissue image of the target region is less than or equal to a preset time threshold. This allows for synchronization of the time corresponding to the blood flow image and tissue image in the multimodal image and the target multimodal image, accurately reflecting the relationship between blood flow and target tissue. It facilitates users' observation of slow-flowing micro-blood flows in the multimodal image, understanding the location of these micro-blood flows in the target tissue of the examined object; and / or facilitates users' observation of tissue information in the multimodal image, enabling the localization of lesion areas.

[0121] In some implementations, step S170, outputting a target multimodal image, includes: displaying the target multimodal image in the target region of the tissue image. For example... Figure 7 and Figure 8 As shown, the target region of the tissue image of the target tissue obtained in step S120 is displayed as the target multimodal image, which makes it easier for users to understand the location of the part corresponding to the target region on the target tissue of the subject being examined, so as to perform targeted analysis on the target multimodal image of the target region.

[0122] The ultrasound imaging method provided in this application includes: emitting a first ultrasound wave and a second ultrasound wave to a target tissue of an object under examination; receiving echo signals from the first ultrasound wave and the second ultrasound wave; acquiring a tissue image of the target tissue based on the echo signal of the first ultrasound wave; determining a target region in the tissue image; acquiring a blood flow image corresponding to the target region based on the echo signal of the second ultrasound wave; superimposing the blood flow image corresponding to the target region and the tissue image corresponding to the target region to obtain a multimodal image; adjusting a first display parameter of the blood flow image corresponding to the target region to obtain a first target display parameter, and / or adjusting a second display parameter of the tissue image corresponding to the target region to obtain a second target display parameter; and outputting a target multimodal image based on the first target display parameter and / or the second target display parameter. The multimodal image contains tissue information and blood flow information of the target tissue of the object under examination. By adjusting the first display parameter of the blood flow image in the multimodal image, and / or adjusting the second display parameter of the tissue image in the multimodal image, the display effect of the multimodal image can be adjusted to obtain a corresponding target multimodal image, allowing the user to observe the information that needs to be emphasized and analyzed in the target multimodal image.

[0123] Please refer to the foregoing embodiments. Figure 9 , Figure 9 This is a schematic flowchart of an ultrasound imaging method provided in another embodiment of this application.

[0124] like Figure 9 As shown, the ultrasound imaging method of this application embodiment includes steps S210 to S230.

[0125] Step S210: Obtain a multimodal image of the target tissue of the subject being examined, wherein the multimodal image includes a tissue image of the target tissue and a blood flow image of the blood flow in the target tissue.

[0126] Step S220: Adjust the first display parameter of the blood flow image to obtain a first target display parameter, and / or adjust the second display parameter of the tissue image to obtain a second target display parameter.

[0127] Step S230: Output the target multimodal image according to the first target display parameters and / or the second target display parameters.

[0128] It should be noted that the multimodal images of the target tissue of the inspected object described in the embodiments of this application are not limited to... Figure 1 or Figure 6 The multimodal images obtained in the illustrated embodiments are not limited to multimodal images obtained by real-time scanning imaging from an ultrasound imaging system. For example, they can also be multimodal images obtained based on historical data, or historical multimodal images. That is, the embodiments of this application can be used to reprocess multimodal images corresponding to historical data or historical multimodal images to obtain better target multimodal images.

[0129] It should be noted that the embodiments of this application are not limited to processing the blood flow image and tissue image in the target area. For example, the complete tissue image of the target tissue obtained in step S120 and the complete blood flow image of the target tissue obtained based on the echo signal of the second ultrasound can be fused (e.g., superimposed) to obtain the multimodal image. Alternatively, the first display parameter of the blood flow image in the multimodal image can be adjusted to obtain a first target display parameter, and / or the second display parameter of the tissue image can be adjusted to obtain a second target display parameter. The obtained multimodal image also contains tissue information and blood flow information of the target tissue of the examined object. By adjusting the first display parameter of the blood flow image in the multimodal image and / or adjusting the second display parameter of the tissue image in the multimodal image, the display effect of the multimodal image can also be adjusted to obtain a corresponding target multimodal image, so that the user can observe the information that needs to be emphasized and analyzed in the target multimodal image.

[0130] In some embodiments, the first target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, and hue; the second target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, and hue.

[0131] For example, the transparency of the tissue image is selected from 0 to 1.

[0132] In some implementations, when a preset trigger is activated, the first display parameter of the blood flow image corresponding to the target area is adjusted to obtain a first target display parameter, and / or the second display parameter of the tissue image corresponding to the target area is adjusted to obtain a second target display parameter.

[0133] In some implementations, a first display parameter of the blood flow image is adjusted according to the user's parameter adjustment operation to obtain a first target display parameter; and / or a second display parameter of the tissue image is adjusted according to the user's parameter adjustment operation to obtain a second target display parameter. For example, when a preset trigger is activated, the first display parameter of the blood flow image corresponding to the target region is adjusted according to the user's parameter adjustment operation to obtain the first target display parameter; and / or, the second display parameter of the tissue image corresponding to the target region is adjusted according to the user's parameter adjustment operation to obtain the second target display parameter.

[0134] For example, the parameter adjustment operation includes setting a display level, and the values ​​of at least one first target display parameter of at least two of the display levels are different, and / or the values ​​of at least one second target display parameter are different.

[0135] In some implementations, a first target display parameter of the blood flow image corresponding to the target region and / or a second target display parameter of the tissue image corresponding to the target region can be adaptively adjusted based on preset information. The preset information includes at least one of the following: the size of the target region in the tissue image, blood flow data in the target tissue corresponding to the target region, image features of the tissue image corresponding to the target region, and image features of the blood flow image corresponding to the target region. For example, when a preset trigger is activated, the first target display parameter of the blood flow image corresponding to the target region and / or the second target display parameter of the tissue image corresponding to the target region can be adaptively adjusted based on the preset information.

[0136] The specific principles and implementation methods of the ultrasound imaging method provided in this application are similar to those of the ultrasound imaging method in the foregoing embodiments, and will not be repeated here.

[0137] Please refer to the above embodiments. Figure 2 , Figure 2 This is a schematic block diagram of an ultrasound imaging system 100 in one embodiment.

[0138] like Figure 2As shown, the ultrasound imaging system 100 includes at least an ultrasound probe 110, a transmitting / receiving circuit 112, and a processor 114. The ultrasound probe 110 is used to excite the ultrasound probe 110 to emit ultrasound waves toward biological tissue and to receive the echoes of the ultrasound waves to obtain ultrasound echo signals; the processor 114 is used to implement the steps of the ultrasound imaging method of any of the embodiments of this application.

[0139] The specific principles and implementation methods of the ultrasound imaging system provided in this application are similar to those of the ultrasound imaging methods in the aforementioned embodiments, and will not be repeated here.

[0140] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, causes the processor to implement the steps of the ultrasound imaging method provided in the above embodiments.

[0141] The computer-readable storage medium can be an internal storage unit of the ultrasound imaging system described in any of the foregoing embodiments, such as the hard disk or memory of the ultrasound imaging system. The computer-readable storage medium can also be an external storage device of the ultrasound imaging system, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the ultrasound imaging system.

[0142] It should be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application.

[0143] It should also be understood that the term “and / or” as used in this application and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0144] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An ultrasound imaging method, characterized in that, include: The system emits a first ultrasonic wave and a second ultrasonic wave towards the target tissue of the subject being examined, and receives the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave. Based on the echo signal of the first ultrasound, a tissue image of the target tissue is obtained; Identify the target region in the tissue image; Based on the echo signal of the second ultrasound, a blood flow image corresponding to the target area is obtained; Identify the regions in the blood flow image corresponding to the target region that contain blood flow signals; Remove the region in the tissue image corresponding to the region with blood flow signal from the tissue image corresponding to the target region to obtain the tissue image to be superimposed; The blood flow image corresponding to the target region is superimposed with the tissue image to be superimposed to obtain a multimodal image. The display parameters of the blood flow image corresponding to the target region in the multimodal image are the first display parameters, and the display parameters of the tissue image to be superimposed in the multimodal image are the second display parameters. Adjust the first display parameters of the blood flow image corresponding to the target region to obtain the first target display parameters, and / or adjust the second display parameters of the tissue image to be superimposed to obtain the second target display parameters; Output a multimodal image of the target based on the first target display parameters and / or the second target display parameters.

2. The ultrasound imaging method according to claim 1, characterized in that, The output target multimodal image includes: The target multimodal image is displayed in the target region of the tissue image.

3. The ultrasound imaging method according to claim 1, characterized in that, The first target display parameters include at least one of the following: transparency, brightness, contrast, saturation, and hue; The second target display parameters include at least one of the following: transparency, brightness, contrast, saturation, and hue.

4. The ultrasound imaging method according to claim 3, characterized in that, The transparency of the tissue image to be overlaid is selected from 0 to 1.

5. The ultrasound imaging method according to claim 1, characterized in that, The adjustment of the first display parameters of the blood flow image corresponding to the target region to obtain the first target display parameters, and / or the adjustment of the second display parameters of the tissue image to be superimposed to obtain the second target display parameters, includes: When a preset trigger is triggered, the first display parameter of the blood flow image corresponding to the target area is adjusted to obtain the first target display parameter, and / or the second display parameter of the tissue image to be superimposed is adjusted to obtain the second target display parameter.

6. The ultrasound imaging method according to claim 1, characterized in that, The adjustment of the first display parameters of the blood flow image corresponding to the target region to obtain the first target display parameters, and / or the adjustment of the second display parameters of the tissue image to be superimposed to obtain the second target display parameters, includes: Based on the user's parameter adjustment operation, adjust the first display parameters of the blood flow image corresponding to the target area to obtain the first target display parameters, and / or The second display parameters of the tissue image to be overlaid are adjusted according to the user's parameter adjustment operation to obtain the second target display parameters.

7. The ultrasound imaging method according to claim 6, characterized in that, The parameter adjustment operation includes setting the display level, and the values ​​of at least one first target display parameter of at least two of the display levels are different, and / or the values ​​of at least one second target display parameter are different.

8. The ultrasound imaging method according to claim 1, characterized in that, The adjustment of the first display parameters of the blood flow image corresponding to the target region to obtain the first target display parameters, and / or the adjustment of the second display parameters of the tissue image to be superimposed to obtain the second target display parameters, includes: Based on preset information, the first target display parameters of the blood flow image corresponding to the target region and / or the second target display parameters of the tissue image to be overlaid are adaptively adjusted. The preset information includes at least one of the following: The size of the target region in the tissue image, the blood flow data of the target tissue corresponding to the target region, the image features of the tissue image corresponding to the target region, and the image features of the blood flow image corresponding to the target region.

9. The ultrasound imaging method according to any one of claims 1-8, characterized in that, The time difference between the reception time of the echo signal corresponding to the blood flow image of the target region and the reception time of the echo signal corresponding to the tissue image of the target region is less than or equal to a preset time threshold.

10. The ultrasound imaging method according to any one of claims 1-8, characterized in that, The second ultrasound wave emitted toward the target tissue of the subject being examined comprises an unfocused wave.

11. The ultrasound imaging method according to claim 10, characterized in that, The non-focused waves include plane waves and / or divergent waves.

12. The ultrasound imaging method according to any one of claims 1-8, characterized in that, The step of acquiring the blood flow image corresponding to the target area based on the echo signal of the second ultrasound includes: The echo signal of the second ultrasound is filtered to remove tissue motion signals from the echo signal and obtain blood flow motion signals, wherein the blood flow motion signals include at least a first blood flow motion signal whose blood flow velocity is within the tissue motion velocity range; Autocorrelation calculation is performed on the blood flow motion signal to obtain blood flow data; A blood flow image corresponding to the target region is generated based on the blood flow data.

13. An ultrasound imaging method, characterized in that, include: A multimodal image of the target tissue of the subject is acquired. The multimodal image includes a tissue image to be superimposed corresponding to the tissue image of the target tissue and a blood flow image of blood flow in the target tissue. The tissue image to be superimposed is obtained by removing the region corresponding to the region with blood flow signal in the blood flow image from the tissue image. Adjust the first display parameters of the blood flow image to obtain a first target display parameter, and / or adjust the second display parameters of the tissue image to be superimposed to obtain a second target display parameter; Output a multimodal image of the target based on the first target display parameters and / or the second target display parameters.

14. The ultrasound imaging method according to claim 13, characterized in that, The step of adjusting the first display parameter of the blood flow image to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image to be superimposed to obtain a second target display parameter, includes: adjusting the first display parameter of the blood flow image to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image to be superimposed to obtain a second target display parameter according to the setting operation of the display level; at least two of the display levels have different values ​​for at least one first target display parameter, and / or at least one second target display parameter has different values.

15. The ultrasound imaging method according to claim 13, characterized in that, During the process of adjusting the first display parameter and / or adjusting the second display parameter, the target multimodal image is updated as the first target display parameter and / or the second target display parameter are updated.

16. The ultrasound imaging method according to claim 13, characterized in that, The first target display parameters include at least one of the following: transparency, brightness, contrast, saturation, and hue; The second target display parameters include at least one of the following: transparency, brightness, contrast, saturation, and hue.

17. The ultrasound imaging method according to claim 13, characterized in that, The adjustment of the first display parameters of the blood flow image to obtain a first target display parameter, and / or the adjustment of the second display parameters of the tissue image to be superimposed to obtain a second target display parameter, includes: When a preset trigger is triggered, the first display parameter of the blood flow image is adjusted to obtain a first target display parameter, and / or the second display parameter of the tissue image corresponding to the tissue image to be superimposed is adjusted to obtain a second target display parameter.

18. An ultrasound imaging system, characterized in that, The ultrasound imaging system includes: Ultrasonic probe; A transmitting / receiving circuit is used to excite the ultrasound probe to emit ultrasound waves toward biological tissue and to receive the echo of the ultrasound waves to obtain an ultrasound echo signal. Processor, used to implement: The steps of the ultrasound imaging method as described in any one of claims 1 to 17.

Images