Ultrasonic imaging method and ultrasonic imaging system

Abstract

The embodiment of the invention provides an ultrasonic imaging method and an ultrasonic imaging system, and the method comprises the steps: transmitting a first ultrasonic wave and a second ultrasonic wave to a target tissue, and receiving an echo signal; acquiring a tissue image of the target tissue according to the echo signal of the first ultrasonic wave; determining a target area in the tissue image; acquiring a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave; superposing the blood flow image corresponding to the target area and the tissue image corresponding to the target area to obtain a multi-modal 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 multi-modal image according to the first target display parameter and / or the second target display parameter. The multi-modal image comprises tissue information and blood flow information, and the display effect of the multi-modal image can be adjusted so that a user can observe information needing to focus on observation and analysis.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and in particular, to an ultrasonic imaging method and an ultrasonic imaging system. Background Art

[0002] An ultrasonic imaging system can support different imaging modes. For example, a B-mode image can be used to display the structure of human tissues. A B-mode image is usually a grayscale image, and blood flow with different speeds or flow directions can also be displayed through a pseudo-color image of the blood flow. In the related art, when displaying the pseudo-color image of the blood flow, the B-mode image is not displayed, which is not conducive to the user's observation of tissue information and lesion locations. Summary of the Invention

[0003] This application provides an ultrasonic imaging method and an ultrasonic imaging system, which can provide a multi-modal image including tissue information and blood flow information of a target tissue of a subject.

[0004] In a first aspect, an embodiment of this application provides an ultrasonic imaging method, including:

[0005] Transmitting a first ultrasonic wave and a second ultrasonic wave to a target tissue of a subject, and receiving an echo signal of the first ultrasonic wave and an echo signal of the second ultrasonic wave;

[0006] Obtaining a tissue image of the target tissue according to the echo signal of the first ultrasonic wave;

[0007] Determining a target area in the tissue image;

[0008] Obtaining a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave;

[0009] Overlaying the blood flow image corresponding to the target area and the tissue image corresponding to the target area to obtain a multi-modal image, where a display parameter of the blood flow image corresponding to the target area in the multi-modal image is a first display parameter, and a display parameter of the tissue image corresponding to the target area in the multi-modal image is a second display parameter;

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

[0011] Outputting a target multi-modal image according to the first target display parameter and / or the second target display parameter.

[0012] In a second aspect, an embodiment of this application provides an ultrasonic imaging method, including:

[0013] Transmit a first ultrasonic wave and a second ultrasonic wave to a target tissue of a subject to be examined, and receive an echo signal of the first ultrasonic wave and an echo signal of the second ultrasonic wave;

[0014] Obtain a tissue image of the target tissue according to the echo signal of the first ultrasonic wave;

[0015] Determine a target area in the tissue image;

[0016] Obtain a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave;

[0017] Determine an area with a blood flow signal in the blood flow image corresponding to the target area;

[0018] Remove an area corresponding to the area with the blood flow signal in the tissue image corresponding to the target area to obtain a tissue image to be superimposed;

[0019] Superimpose the blood flow image corresponding to the target area and the tissue image to be superimposed to obtain a multimodal image, where a display parameter of the blood flow image corresponding to the target area in the multimodal image is a first display parameter, and a display parameter of the tissue image corresponding to the target area in the multimodal image is a second display parameter;

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

[0021] Output a target multimodal image according to the first target display parameter and / or the second target display parameter.

[0022] In a third aspect, an embodiment of the present application provides an ultrasonic imaging method, including:

[0023] Obtain a multimodal image of a target tissue of a subject to be examined, where the multimodal image includes a tissue image of the target tissue and a blood flow image of 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 target multimodal image according to the first target display parameter and / or the second target display parameter.

[0026] In a fourth aspect, an embodiment of the present application provides an ultrasonic imaging system, and the ultrasonic imaging system includes:

[0027] An ultrasonic probe;

[0028] A transmitting / receiving circuit, configured to excite the ultrasonic probe to transmit ultrasonic waves to biological tissue and receive the echoes of the ultrasonic waves to obtain ultrasonic echo signals;

[0029] A processor, configured to implement the steps of the foregoing ultrasonic imaging method.

[0030] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the processor is caused to implement the steps of the above method.

[0031] An embodiment of the present application provides an ultrasonic imaging method and an ultrasonic imaging system. The ultrasonic imaging method includes: transmitting a first ultrasonic wave and a second ultrasonic wave to a target tissue of a subject to be examined, and receiving the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave; obtaining a tissue image of the target tissue according to the echo signal of the first ultrasonic wave; determining a target area in the tissue image; obtaining a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave; superimposing the blood flow image corresponding to the target area and the tissue image corresponding to the target area to obtain a multimodal image; adjusting a first display parameter of the blood flow image corresponding to the target area to obtain a first target display parameter, and / or adjusting a second display parameter of the tissue image corresponding to the target area to obtain a second target display parameter; outputting a target multimodal image according to 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 subject to be examined. 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, so that a user can observe the information that needs to be focused on and analyzed in the target multimodal image.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the disclosure of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is a schematic flowchart of an ultrasonic imaging method provided by an embodiment of the present application;

[0035] Figure 2 is a schematic block diagram of an ultrasonic imaging system in some embodiments of the present application;

[0036] Figure 3 is a schematic diagram of obtaining multi-modal images in some embodiments of the present application;

[0037] Figure 4 is a schematic diagram of displaying a blood flow image of a target area in the related art;

[0038] Figure 5 is a schematic diagram of displaying a blood flow image and a tissue image in the related art;

[0039] Figure 6 is a schematic flowchart of an ultrasonic imaging method provided by another embodiment of the present application;

[0040] Figure 7 is a schematic diagram of multi-modal images in some embodiments of the present application;

[0041] Figure 8 is a schematic diagram of target multi-modal images corresponding to different target display parameters in some embodiments of the present application;

[0042] Figure 9 is a schematic flowchart of an ultrasonic imaging method provided by still another embodiment of the present application. Detailed Embodiments

[0043] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] The flowcharts shown in the accompanying drawings are only illustrative examples, and do not necessarily include all the contents and operations / steps, nor do they necessarily need to be executed in the described order. For example, some operations / steps can be decomposed, combined, or partially merged, so the actual execution order may be changed according to the actual situation.

[0045] Next, some embodiments of the present application will be described in detail in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0046] Please refer to Figure 1 , Figure 1 is a schematic flowchart of an ultrasonic imaging method provided by an embodiment of the present application. The method can be applied in an ultrasonic imaging system to obtain multi-modal images including tissue information and blood flow information of a target tissue of a subject.

[0047] Please refer to Figure 2 , an ultrasonic imaging system according to an embodiment of the present application Figure 2 shows a schematic structural block diagram of an ultrasonic imaging system 100 according to an embodiment of the present application

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

[0049] Specifically, the ultrasonic probe 110 includes a plurality of transducer elements. The plurality of transducer elements can be arranged in a row to form a linear array, or arranged in a two-dimensional matrix to form a planar array, and the plurality of transducer elements can also form a convex array. The transducer is used to emit ultrasonic waves according to the excitation electrical signal, or convert the received ultrasonic waves into electrical signals. Therefore, each element can be used to realize the mutual conversion between the electrical pulse signal and the ultrasonic wave, so as to emit ultrasonic waves to the tissue in the target area of the object to be measured, and can also be used to receive the ultrasonic echo reflected by the tissue. During ultrasonic imaging, which transducers are used to emit ultrasonic waves and which transducers are used to receive ultrasonic waves can be controlled through the transmit sequence and the receive sequence, or the transducers can be controlled to be used for emitting ultrasonic waves or receiving the echoes of ultrasonic waves in different time slots. The transducers participating in ultrasonic wave emission can be simultaneously excited by electrical signals to emit ultrasonic waves simultaneously; or, the transducers participating in ultrasonic beam emission can also be excited by several electrical signals with a certain time interval to continuously emit ultrasonic waves with a certain time interval

[0050] The transmit / receive circuit 112 can be connected to the ultrasonic probe 110 through a transmit / receive selection switch. The transmit / receive selection switch can also be referred to as a transmit / receive controller, which may include a transmit controller and a receive controller. The transmit controller is used to excite the ultrasonic probe 110 to emit ultrasonic waves to the area where the target tissue of the object to be examined is located via the transmit circuit; the receive controller is used to receive the ultrasonic echo returned from the area where the target tissue is located through the ultrasonic probe 110 via the receive circuit, so as to obtain ultrasonic echo data. Then, the transmit / receive circuit 112 sends the electrical signal of the ultrasonic echo into the beamforming circuit, and the beamforming circuit performs processing such as focusing delay, weighting, and channel summation on the electrical signal, and then sends the processed ultrasonic echo data into the processor 114

[0051] Optionally, the processor 114 can be implemented by software, hardware, firmware, or any combination thereof. Circuits, single or multiple application specific integrated circuits (ASICs), single or multiple general integrated circuits, single or multiple microprocessors, single or multiple programmable logic devices, or any combination of the foregoing circuits and / or devices, or other suitable circuits or devices can be used, so that the processor 114 can execute the corresponding steps of the methods in various embodiments of this specification. Moreover, the processor 114 can control other components in the ultrasonic imaging system 100 to perform desired functions.

[0052] Optionally, the processor 114 processes the received ultrasonic echo data to obtain two-dimensional ultrasonic data or three-dimensional ultrasonic data of the target tissue of the subject to be examined. As an example, the ultrasonic probe 110 emits / receives ultrasonic waves in a series of scanning planes, and the processor 114 integrates them according to their three-dimensional spatial relationships to achieve the scanning of the target tissue in three-dimensional space and the reconstruction of three-dimensional images. Finally, after the processor 114 performs some or all of the image post-processing steps such as denoising, smoothing, and enhancement on it, three-dimensional ultrasonic data of the target tissue is obtained. The processor 114 can obtain three-dimensional ultrasonic data of the entire target tissue, or only obtain three-dimensional ultrasonic data of a partial region of the target tissue; the processor 114 is also used to extract a standard section of the target tissue from the three-dimensional ultrasonic data. Of course, it is not limited thereto. For example, the processor 114 can process the two-dimensional ultrasonic data of the target tissue to obtain a standard section of the target tissue.

[0053] The standard section obtained by the processor 114 can be stored in the memory or displayed on the display 116. Moreover, the processor 114 can also render the three-dimensional ultrasonic data and display it on the display 116.

[0054] The display 116 is connected to the processor 114. The display 116 can be a touch display screen, a liquid crystal display screen, etc.; or the display 116 can be an independent display device such as a liquid crystal display or a television outside the ultrasonic imaging system 100; or the display 116 can be a display screen of an electronic device such as a smart phone or a tablet computer, etc. Among them, the number of displays 116 can be one or more. For example, the display 116 can include a main screen and a touch screen. The main screen is mainly used to display ultrasonic images, and the touch screen is mainly used for human-computer interaction.

[0055] The display 116 can display the ultrasonic images obtained by the processor 114. In addition, while displaying the ultrasonic images, the display 116 can also provide a graphical interface for the user to perform human-computer interaction. One or more controlled objects are set on the graphical interface, and the user is provided with a human-computer interaction device to input operation instructions to control these controlled objects, so as to perform corresponding control operations. For example, an icon is displayed on the graphical interface, and the icon can be operated by using the human-computer interaction device to perform a specific function.

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

[0057] Among them, the human-computer interaction device may include an input device for detecting the input information of the user. The input information can be, for example, a control instruction for the ultrasonic emission / reception timing, an operation input instruction for drawing points, lines, or frames on the ultrasonic image, or may also include other instruction types. The input device can include one or a combination of a keyboard, a mouse, a roller, a trackball, a mobile input device (such as a mobile device with a touch display screen, a mobile phone, etc.), a multi-functional knob, and the like. The human-computer interaction device may also include an output device such as a printer.

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

[0059] It should be understood that Figure 2 The components included in the illustrated ultrasonic imaging system 100 are only schematic, and it may include more or fewer components. This application is not limited thereto.

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

[0061] Step S110: Transmit a first ultrasonic wave and a second ultrasonic wave to a target tissue of a subject to be 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 ultrasonic wave and the echo signal of the first ultrasonic wave can be used to obtain a tissue image of the target tissue, such as obtaining a cross-sectional image of the target tissue; the second ultrasonic wave and the echo signal of the second ultrasonic wave can be used to obtain a blood flow image of the blood flow on the target tissue. For example, transmitting the first ultrasonic wave and receiving the echo signal of the first ultrasonic wave can be a B-mode (brightness mode) scan, and transmitting the second ultrasonic wave and receiving the echo signal of the second ultrasonic wave can be a C-mode (depth mode) scan or can be called a blood flow scan.

[0063] Exemplarily, the first ultrasonic wave can be first transmitted to the target tissue and the echo signal of the first ultrasonic wave can be received, and then the second ultrasonic wave can be transmitted to the target tissue and the echo signal of the second ultrasonic wave can be received; or alternatively, the second ultrasonic wave can be first transmitted to the target tissue and the echo signal of the second ultrasonic wave can be received, and then the first ultrasonic wave can be transmitted to the target tissue and the echo signal of the first ultrasonic wave can be received. For example, the B-mode scan and the blood flow scan can be interspersed, for example, each frame scan time includes a B-mode scan and a blood flow scan.

[0064] Step S120, obtain a tissue image of the target tissue according to the echo signal of the first ultrasonic wave.

[0065] For example, a tissue image can be obtained after signal processing steps such as signal amplification, analog-to-digital conversion, and beam synthesis on the received echo signal of the first ultrasonic wave. The tissue image includes, for example, a B-mode ultrasonic image.

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

[0067] For example, the user can adjust the position and angle of the probe according to the real-time displayed tissue image to obtain a desired tissue image, such as obtaining a clear tissue structure image. Optionally, the ultrasonic parameters corresponding to the ultrasonic probe array unit can also be adjusted according to the real-time displayed tissue image to obtain a tissue image with the best effect; the ultrasonic parameters can include front-end parameters and / or back-end parameters, where the front-end parameters include at least one of the following: scale, frequency, sensitivity, line density, and the back-end parameters include at least one of the following: wall filter, gain, frame correlation, smoothing, priority, dynamic range, gray scale map, speckle noise suppression.

[0068] In some embodiments, after determining that a tissue image with the best effect is obtained, the second ultrasonic wave can be started to be transmitted to the target tissue of the subject under examination, and the echo signal of the second ultrasonic wave can be received for blood flow scanning and obtaining a blood flow image; 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 the region that needs to be studied in detail. For example, it can be the region where fine blood flow needs to be observed. The target region can be referred to as the Region Of Interest (ROI).

[0071] Exemplarily, according to the user's region determination operation, the target region in the tissue image can be determined, including determining the size and / or position of the target region. Please refer to Figure 3 , the user can frame the target region in the tissue image. It should be noted that the target region is not limited to being rectangular, and can also be other shapes, such as circular, triangular, hexagonal, etc.

[0072] Exemplarily, the ultrasonic imaging device can automatically determine the 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 identify a preset tissue in the tissue image, such as the endometrium, through image recognition, and determine the size and / or position of the target region according to the range of the preset tissue. The target region is the region including the preset tissue.

[0073] Step S140: Obtain the blood flow image corresponding to the target region according to the echo signal of the second ultrasonic wave.

[0074] In some embodiments, the blood flow image corresponding to the target tissue can be obtained according to the echo signal of the second ultrasonic wave, and then according to the target region in the tissue image, the blood flow image corresponding to the target image in the blood flow image corresponding to the target tissue can be determined; for example, the blood flow image corresponding to the target region can be intercepted in the blood flow image corresponding to the target tissue according to the size and position of the target region in the tissue image.

[0075] In some other embodiments, the echo signal corresponding to the target region can be identified in the echo signal of the second ultrasonic wave, and the blood flow image corresponding to the target tissue can be obtained according to the echo signal corresponding to the target region.

[0076] The blood flow image can be a pseudo-color image. For example, different colors are used in the blood flow image to represent blood flow with different speeds or directions; the user can intuitively understand the speed and direction of blood flow in the target tissue through the blood flow image.

[0077] In some embodiments, please refer to Figure 3, after 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 according to the echo signal of the second ultrasonic wave, so as to ensure that the obtained blood flow image has high-quality structure and details, so that the blood flow information can be better displayed in the blood flow image. For example, the information of fine blood flow can be displayed, making it easier to identify the details of the fine blood flow.

[0078] In some embodiments, the second ultrasonic wave emitted to the target tissue of the subject includes a non-focused wave. Preferably, the non-focused wave includes a plane wave and / or a divergent wave. By using the non-focused wave to detect the blood flow velocity vectors of each target point in the blood vessel region, compared with the line-by-line emission scanning of the focused wave, it can achieve one ultrasonic emission to cover the entire blood vessel region to be detected, improve the frame rate of the blood flow velocity vector imaging, and thus be able to capture the small changes in blood flow in a short time. The blood flow image obtained according to the echo signal of the second ultrasonic wave can show the fine blood flow more finely, making it easier to identify the details of the fine blood flow.

[0079] In some embodiments, the blood flow image includes blood flow with a relatively fast flow velocity and / or blood flow with a relatively slow flow velocity. In the embodiments of the present application, the case where the blood flow image includes blood flow with a relatively slow flow velocity (such as a flow velocity below 5 cm / s) is mainly taken as an example for illustration. It should be noted that the embodiments of the present application can adjust the display effect of the multi-modal image including the tissue information and blood flow information of the target tissue of the subject by adjusting the first display parameter of the blood flow image and / or the second display parameter of the tissue image. For example, it can facilitate the user to observe the fine blood flow with a relatively slow flow velocity in the multi-modal image and understand the position of these fine blood flows on the target tissue of the subject; and / or facilitate the user to observe the tissue information in the multi-modal image and achieve the localization of the lesion area.

[0080] Exemplarily, step S140 obtains the blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave, including: performing filtering processing on the echo signal of the second ultrasonic wave to filter out the tissue motion signal in the echo signal and obtain a blood flow motion signal, where the blood flow motion signal at least includes 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 the blood flow image corresponding to the target area according to the blood flow data.

[0081] For example, the time characteristics and spatial characteristics of the echo signal of the second ultrasonic wave are extracted by spatio-temporal wall filtering (such as spatio-temporal adaptive wall filtering), and the time characteristics and spatial characteristics are analyzed to filter out the tissue motion signal in the echo signal, so as to obtain the blood flow motion signal. The blood flow motion signal may include a first blood flow motion signal (or called a low-speed motion signal) with a blood flow speed within the tissue motion speed range (such as a blood flow speed below 5 cm / s), and may also include a second blood flow motion signal with a blood flow speed higher than the tissue motion speed range (a high-speed motion signal with a speed higher than the low-speed motion signal). Through spatio-temporal wall filtering, it is possible to more effectively distinguish the blood flow with slow motion from the slow tissue motion, and on the basis of filtering out the tissue, the blood flow signal with slow motion can be retained, thus improving the blood flow detection sensitivity and having a better display for slow blood flow. Optionally, when filtering out the tissue motion signal in the echo signal through spatio-temporal wall filtering to obtain the blood flow motion signal, the echo signal of the second ultrasonic wave acquired within a preset duration greater than or equal to is processed by spatio-temporal wall filtering. The preset duration is, for example, greater than the duration of blood flow scanning within one frame of scanning time, which can improve the filtering effect of spatio-temporal adaptive wall filtering and will not affect the scanning frame rate.

[0082] Exemplarily, the blood flow data obtained by performing autocorrelation calculation on the blood flow motion signal may include at least one of the average blood flow velocity, variance, and energy.

[0083] Autocorrelation calculation, for example, includes a phase difference analysis algorithm, which can estimate the characteristics generated by the Doppler effect as three physical quantities: velocity, energy, and variance. The velocity information obtained by autocorrelation calculation can be mapped into pseudo-color information, and the generated pseudo-color image can be called a Doppler color blood flow image (which can be called a velocity image); the energy information obtained by autocorrelation estimation can also be mapped into pseudo-color information, and the generated pseudo-color image can be called an energy image; the variance information obtained by autocorrelation estimation can also be mapped into pseudo-color information, and the generated pseudo-color image can be called a variance image. The blood flow image in the embodiments of the present application may include any one or more of the velocity image, energy image, and variance image.

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

[0085] Step S150: Superimpose the blood flow image corresponding to the target region and the tissue image corresponding to the target region to obtain a multi-modal image. The display parameter of the blood flow image corresponding to the target region in the multi-modal image is the first display parameter, and the display parameter of the tissue image corresponding to the target region in the multi-modal image is the second display parameter.

[0086] As shown Figure 4 in the figure, it is a schematic diagram showing the blood flow image of the target area in the related art. The area corresponding to the area without blood flow signal in the target area is displayed in all black, that is, the tissue image is not displayed. Only the blood flow signal of the blood flow image in the target area is visible, which helps to highlight the information of fine blood flow and makes it easier to observe and analyze. However, this display mode does not display tissue information and is not conducive to the observation of tissue information and the lesion location. For example, it is impossible to achieve the auxiliary positioning of the lesion area. As shown Figure 5 in the figure, it is a schematic diagram showing the display of the blood flow image and the tissue image separately in the related art, which is not conducive to the user to understand the position of the blood flow situation relative to the surrounding tissues.

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

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

[0089] In some embodiments, the blood flow image corresponding to the target area and the tissue image corresponding to the target area can be two image layers, and the 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 area is superimposed on the target area of the tissue image, and the image in the target area of the obtained image can also be called the multimodal image.

[0090] Obtaining the multimodal image according to the blood flow image corresponding to the target area and the tissue image corresponding to the target area can be referred to as image fusion of the blood flow image corresponding to the target area and the tissue image corresponding to the target area. It should be noted that the image fusion is not limited to the method of step S150, and the multimodal image can also be obtained by other image fusion methods.

[0091] For example, in some other embodiments of the present application, please refer to Figure 6, the multi-modal image can be obtained according to 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 and the tissue image to be superimposed to obtain a multi-modal image, where the display parameter of the blood flow image corresponding to the target region in the multi-modal image is the first display parameter, and the display parameter of the tissue image corresponding to the target region in the multi-modal image is the second display parameter.

[0092] Exemplarily, first convert the blood flow image corresponding to the target region into a binary image of 0 and 1 to determine the region with blood flow signal in the blood flow image corresponding to the target region; for example, 1 in the binary image represents the region with blood flow signal, and 0 represents the region without blood flow signal. Then take a mask on the tissue image corresponding to the target region according to the binary image to obtain the region corresponding to the region with blood flow signal in the tissue image corresponding to the target region; then subtract the image obtained by taking the mask from the tissue image corresponding to the target region to obtain a tissue image with the region corresponding to the region with blood flow signal removed, which can be called the tissue image to be superimposed.

[0093] In the multi-modal image obtained by superimposing the blood flow image corresponding to the target region and the tissue image to be superimposed, it is possible to prevent the region corresponding to the blood flow image corresponding to the target region in the tissue image corresponding to the target region from interfering with the blood flow image, so as to clearly and accurately represent the blood flow on the target tissue corresponding to the target region.

[0094] In some embodiments, the display parameter of the blood flow image corresponding to the target region in the multi-modal image obtained in step S150 is the same as the display parameter of the blood flow image corresponding to the target region obtained in step S140, and the display parameter of the tissue image corresponding to the target region in the multi-modal image is the same as the display parameter of the blood flow image corresponding to the target region when determining the target region in the tissue image in step S130.

[0095] As Figure 7 shown in the schematic diagram of the multi-modal image in some embodiments, the multi-modal image contains the tissue information and blood flow information of the target tissue in the target region, which is convenient for better observing the lesions of blood flow-related tissues; however, the tissue information of the target tissue in the multi-modal image sometimes interferes with the blood flow information, for example, it is not conducive to the user to observe the fine information of the micro blood flow.

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

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

[0098] For ease of explanation, the embodiments of the present application mainly take 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 as examples for illustration.

[0099] Exemplarily, the blood flow image corresponding to the target area and the tissue image corresponding to the target area are two image layers, and the visibility of the image layer can be controlled by adjusting the transparency of the image layer. Generally, the value of transparency is between 0 and 1, where 0 represents completely transparent and 1 represents completely opaque. The display intensity of the two images in the target multimodal image can be controlled by 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.

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

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

[0102] Among them, from the target multi-modal image A to the target multi-modal image E, the intensity (or visibility) of the tissue image corresponding to the target region in the target multi-modal image gradually increases; the tissue image corresponding to the target region in the target multi-modal image A is invisible, that is, the part without blood flow signal in the target multi-modal image A is displayed as black, which is convenient for better observing the details of micro blood flow; the intensity of the tissue image corresponding to the target region in the target multi-modal image E is the strongest. For example, the display parameters of the tissue image corresponding to the target region in the target multi-modal image E are the same as those of the blood flow image corresponding to the target region when determining the target region in the tissue image in step S130, and the display effect of the tissue image corresponding to the target region in the target multi-modal image E is the display mode of the gray scale of the original tissue image, which is convenient for better observing the lesions of blood flow-related tissues.

[0103] Exemplarily, by adjusting the transparency of the tissue image corresponding to the target region from 0 to 1, the tissue image corresponding to the target region in the target multi-modal image can be adjusted from completely transparent to completely opaque, and the target multi-modal images A to E with different display effects as shown can be obtained respectively. When the transparency is 0, the tissue image is completely invisible and can be displayed as a preset color such as black to obtain the target multi-modal image A; when the transparency is 1, the tissue image completely displays the original image to obtain the target multi-modal image E. Figure 8 Exemplarily, 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 multi-modal image can be adjusted, and the target multi-modal images corresponding to different first target display parameters can be obtained. For example, when the intensity of the blood flow image corresponding to the target region is adjusted to the lowest, such as when the transparency of the blood flow image corresponding to the target region is adjusted to 0 and the blood flow image corresponding to the target region is completely invisible, the tissue image corresponding to the target region is completely displayed in the target multi-modal image obtained by superimposing with the tissue image corresponding to the target region, which is convenient for the user to analyze the tissue image.

[0104] In some embodiments, the 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: when a preset trigger is triggered, 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. When the preset trigger is triggered, the corresponding target multi-modal image can be obtained by adjusting the first target display parameter and / or adjusting the second display parameter.

[0105]

[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, a trackball; the virtual trigger includes, for example, at least one of a slider, a button, or other interactive elements of a preset interactive interface. The virtual trigger and the physical trigger can be triggered according to user operations, or the virtual trigger can also be automatically triggered by the ultrasonic imaging device when preset conditions are met.

[0107] In the case where the preset trigger is not triggered, the multi-modal image obtained in step S150 can be output as the target multi-modal image.

[0108] In some embodiments, the user can adjust the first display parameter of the blood flow image corresponding to the target region and / or adjust the second display parameter of the tissue image corresponding to the target region. Step S160 of 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 can 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 a 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 a second target display parameter.

[0109] For example, the parameter adjustment operation can include an operation on a preset adjustment member, and the preset adjustment member includes but is not limited to at least one of the following: a virtual adjustment member, a physical adjustment member; wherein the physical adjustment member includes but is not limited to at least one of the following: a keyboard, a mouse, a scroll wheel, a trackball; the virtual adjustment member includes, for example, at least one of a slider, a button, or other interactive elements of a preset interactive interface.

[0110] Exemplarily, during the process of the user adjusting the first display parameter and / or adjusting the second display parameter, the first target display parameter and / or the second display parameter are updated in real time, and the corresponding target multi-modal image is updated according to the first target display parameter and / or the second display parameter updated in real time; so that the user can determine whether the updated target multi-modal image meets the requirements or achieves the best effect, such as determining whether the most appropriate balance is achieved between the blood flow image and the tissue image in the target multi-modal image. For example, when it is determined that the updated target multi-modal 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 ultrasonic imaging device can also be triggered to store the target multi-modal image.

[0111] Exemplarily, the parameter adjustment operation includes an operation of setting a display gear, and at least one value of at least one first target display parameter of at least two of the display gears is different, and / or at least one value of at least one second target display parameter is different. Please refer to Figure 8 , the target multimodal images corresponding to the five display gears A to gear E are respectively target multimodal image A to target multimodal image E. The target multimodal image A corresponding to gear A is a tissue image in the target area that is not displayed (i.e., the tissue image in the target area is displayed in all black), and the tissue image in the target multimodal image E corresponding to gear E is in the grayscale display mode of the original tissue image.

[0112] For example, the operation of setting the display gear may include an operation of selecting a target display gear in a gear list, or the operation of setting the display gear may be performed by dragging the position of a slider. It should be noted that the number of display gears in the embodiments of the present application may not be limited. For example, there may be only two display gears, gear A and gear E; the more the number of display gears, the more detailed the display effect adjustment can be provided.

[0113] Exemplarily, when a preset trigger is triggered, the first display parameter of the blood flow image corresponding to the target area may 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 may be adjusted according to the user's parameter adjustment operation to obtain a second target display parameter.

[0114] For example, when obtaining and displaying the multimodal image in step S150, the user may determine whether to adjust the first display parameter and / or the second display parameter according to needs. For example, when the multimodal image displayed after step S150 cannot represent the details of the blood flow well, the user may trigger the preset trigger to activate the parameter adjustment function, so as to obtain the corresponding target multimodal image by adjusting the first display parameter and / or the second display parameter. When the preset trigger is not triggered, it is possible to prevent misoperations from deteriorating the display effect of the displayed multimodal image.

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

[0116] Exemplarily, the ultrasonic imaging system may adaptively adjust the first display parameter of the blood flow image corresponding to the target region and / or the second display parameter of the tissue image corresponding to the target region in step S150, and obtain the multimodal image according to the adaptively adjusted first display parameter and / or second display parameter. Alternatively, when outputting the multimodal image in step S150, the adaptively adjusted first display parameter and / or second display parameter may be output as a recommended value or a reference value for user adjustment.

[0117] Exemplarily, when a preset trigger is triggered, 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. When the preset trigger is not triggered, the multimodal image obtained in step S150 may be output as the target multimodal image.

[0118] Exemplarily, 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, where 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 blood flow in 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.

[0119] For example, the larger the size of the target region in the tissue image, the second target display parameter of the tissue image corresponding to the target region may be adjusted to reduce the intensity of the tissue image in the target multimodal image, so as to reduce the interference with the blood flow image in the target multimodal image; the slower the blood flow speed in the target tissue corresponding to the target region, the first display parameter of the blood flow image corresponding to the target region may be adjusted to increase the intensity of the blood flow image in the target multimodal image, so that the user can better observe the details of the fine blood flow; when it is determined according to the image features of the tissue image corresponding to the target region that the interference of the tissue image corresponding to the target region on the blood flow image is strong, the second target display parameter of the tissue image corresponding to the target region may be adjusted to reduce the intensity of the tissue image in the target multimodal image, so as to reduce the interference with the blood flow image in the target multimodal image; when it is determined according to the image features of the blood flow image corresponding to the target region 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 may be adjusted to increase the intensity of the blood flow image in the target multimodal image. Of course, it is not limited to this. For example, the direction of adjusting the target display parameter may be opposite to the foregoing examples.

[0120] In some embodiments, the time difference between the reception time of the echo signal corresponding to the blood flow image corresponding to the target region and the reception time of the echo signal corresponding to the tissue image corresponding to the target region is less than or equal to a preset time threshold. This can synchronize the moments of the blood flow image and the tissue image in the multi-modal image and the target multi-modal image, accurately reflecting the relationship between the blood flow and the target tissue. It is convenient for the user to observe the fine blood flow with a slow flow velocity in the multi-modal image and understand the position of this fine blood flow on the target tissue of the subject under examination; and / or it is convenient for the user to observe the tissue information in the multi-modal image to locate the lesion area.

[0121] In some embodiments, the step S170 outputs a target multi-modal image, including: displaying the target multi-modal image in the target region of the tissue image. As Figure 7 and Figure 8 shown, displaying the target multi-modal image in the target region of the tissue image of the target tissue obtained in step S120 can facilitate the user to understand the position of the part corresponding to the target region on the target tissue of the subject under examination, so as to perform targeted analysis on the target multi-modal image of the target region.

[0122] The ultrasonic imaging method provided by the embodiments of the present application includes: emitting a first ultrasonic wave and a second ultrasonic wave to the target tissue of the subject under examination, and receiving the echo signals of the first ultrasonic wave and the second ultrasonic wave; obtaining a tissue image of the target tissue according to the echo signal of the first ultrasonic wave; determining a target region in the tissue image; obtaining a blood flow image corresponding to the target region according to the echo signal of the second ultrasonic wave; superimposing the blood flow image corresponding to the target region and the tissue image corresponding to the target region to obtain a multi-modal 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; outputting a target multi-modal image according to the first target display parameter and / or the second target display parameter. The multi-modal image contains tissue information and blood flow information of the target tissue of the subject under examination. By adjusting the first display parameter of the blood flow image in the multi-modal image and / or adjusting the second display parameter of the tissue image in the multi-modal image, the display effect of the multi-modal image can be adjusted to obtain a corresponding target multi-modal image, so that the user can observe the information that needs to be focused on and analyzed in the target multi-modal image.

[0123] Please refer to Figure 9 , Figure 9 which is a schematic flowchart of an ultrasonic imaging method provided by another embodiment of the present application.

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

[0125] Step S210: Obtain multimodal images of the target tissue of the subject to be examined, where the multimodal images include tissue images of the target tissue and blood flow images 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 target multimodal images according to the first target display parameter and / or the second target display parameter.

[0128] It should be noted that the multimodal images of the target tissue of the subject to be examined in the embodiment of the present application may not be limited to Figure 1 or Figure 6 the multimodal images obtained in the embodiments shown, or not limited to the multimodal images obtained by real-time scanning and imaging of an ultrasonic imaging system. For example, they may also be multimodal images obtained according to historical data, or historical multimodal images. That is, the embodiments of the present application can be used to reprocess the 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 the present application may not be limited to processing the blood flow images and tissue images in the foregoing target areas. For example, the complete tissue images of the target tissue obtained in the foregoing step S120 and the complete blood flow images of the target tissue obtained according to the echo signals of the second ultrasonic wave can be fused (such as superimposed) to obtain the multimodal images. The first display parameter of the blood flow image in the multimodal image can also 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 images also contain tissue information and blood flow information of the target tissue of the subject to be examined. 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 corresponding target multimodal images, so that the user can observe the information that needs to be focused on and analyzed in the target multimodal images.

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

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

[0132] In some embodiments, when a preset trigger is triggered, 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 embodiments, according to the user's parameter adjustment operation, the first display parameter of the blood flow image is adjusted to obtain a first target display parameter; and / or according to the user's parameter adjustment operation, the second display parameter of the tissue image is adjusted to obtain a second target display parameter. For example, when a preset trigger is triggered, according to the user's parameter adjustment operation, 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, according to the user's parameter adjustment operation, the second display parameter of the tissue image corresponding to the target area is adjusted to obtain a second target display parameter.

[0134] Exemplarily, the parameter adjustment operation includes an operation for setting a display gear, and at least one value of at least two first target display parameters is different, and / or at least one value of at least one second target display parameter is different.

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

[0136] The specific principles and implementation manners of the ultrasonic imaging method provided by the embodiments of the present application are similar to those of the ultrasonic imaging method in the foregoing embodiments, and will not be elaborated here.

[0137] Please refer to the above embodiments in conjunction with Figure 2 , Figure 2 which is a schematic block diagram of an ultrasonic imaging system 100 in an embodiment.

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

[0139] The specific principle and implementation manner of the ultrasonic imaging system provided in the embodiments of the present application are similar to those of the ultrasonic imaging method in the foregoing embodiments, and will not be elaborated here.

[0140] The embodiments of the present application further provide a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor is caused to implement the steps of the ultrasonic imaging method provided in the foregoing embodiments.

[0141] Among them, the computer-readable storage medium may be an internal storage unit of the ultrasonic imaging system according to any one of the foregoing embodiments, such as the hard disk or memory of the ultrasonic imaging system. The computer-readable storage medium may also be an external storage device of the ultrasonic imaging system, such as a plug-in hard disk equipped on the ultrasonic imaging system, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc.

[0142] It should be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0143] It should also be understood that the term "and / or" used in the present application and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0144] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed by the present application, and these modifications or substitutions should all be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An ultrasonic imaging method, characterized in that, it includes: Emitting a first ultrasonic wave and a second ultrasonic wave to a target tissue of a subject to be examined, and receiving the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave; Obtaining a tissue image of the target tissue according to the echo signal of the first ultrasonic wave; Determining a target area in the tissue image; Obtaining a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave; Overlaying the blood flow image corresponding to the target area and the tissue image corresponding to the target area to obtain a multimodal image, where the display parameter of the blood flow image corresponding to the target area in the multimodal image is a first display parameter, and the display parameter of the tissue image corresponding to the target area in the multimodal image is a second display parameter; Adjusting the first display parameter of the blood flow image corresponding to the target area to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image corresponding to the target area to obtain a second target display parameter; Outputting a target multimodal image according to the first target display parameter and / or the second target display parameter.

2. An ultrasonic imaging method, characterized in that, it includes: Emitting a first ultrasonic wave and a second ultrasonic wave to a target tissue of a subject to be examined, and receiving the echo signal of the first ultrasonic wave and the echo signal of the second ultrasonic wave; Obtaining a tissue image of the target tissue according to the echo signal of the first ultrasonic wave; Determining a target area in the tissue image; Obtaining a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave; Determining an area with blood flow signal in the blood flow image corresponding to the target area; Removing the area corresponding to the area with blood flow signal in the tissue image corresponding to the target area to obtain a tissue image to be overlaid; Overlaying the blood flow image corresponding to the target area and the tissue image to be overlaid to obtain a multimodal image, where the display parameter of the blood flow image corresponding to the target area in the multimodal image is a first display parameter, and the display parameter of the tissue image corresponding to the target area in the multimodal image is a second display parameter; Adjusting the first display parameter of the blood flow image corresponding to the target area to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image corresponding to the target area to obtain a second target display parameter; Outputting a target multimodal image according to the first target display parameter and / or the second target display parameter.

3. The ultrasonic imaging method according to claim 1 or 2, characterized in that, the outputting the target multimodal image includes: Displaying the target multimodal image in the target area of the tissue image.

4. The ultrasonic imaging method according to claim 1 or 2, characterized in that, the first target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, hue; the second target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, hue.

5. The ultrasonic imaging method according to claim 4, characterized in that, The transparency of the tissue image corresponding to the target region is selected from 0 to 1.

6. The ultrasonic imaging method according to claim 1 or 2, wherein, the 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: when a preset trigger is triggered, 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.

7. The ultrasonic imaging method according to claim 6, wherein, the 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 according to the user's parameter adjustment operation to obtain a 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 a second target display parameter.

8. The ultrasonic imaging method according to claim 7, wherein, the parameter adjustment operation includes a display gear setting operation, and at least one value of at least two of the first target display parameters is different, and / or at least one value of at least one of the second target display parameters is different.

9. The ultrasonic imaging method according to claim 6, wherein, the 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: adapting to adjust 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, the preset information includes at least one of the following information: the size of the target region in the tissue image, the blood flow data of the blood flow in the target tissue corresponding to the target region, the image features of the tissue image corresponding to the target region, the image features of the blood flow image corresponding to the target region.

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

11. The ultrasonic imaging method according to any one of claims 1-9, wherein, the second ultrasonic wave emitted to the target tissue of the subject includes a non-focused wave, preferably, the non-focused wave includes a plane wave and / or a divergent wave.

12. The ultrasonic imaging method according to any one of claims 1-9, wherein, Obtaining a blood flow image corresponding to the target area according to the echo signal of the second ultrasonic wave includes: Performing filtering processing on the echo signal of the second ultrasonic wave to filter out tissue motion signals in the echo signal and obtain blood flow motion signals, where the blood flow motion signals at least include first blood flow motion signals with blood flow velocities within the tissue motion velocity range; Performing autocorrelation calculation on the blood flow motion signals to obtain blood flow data; Generating a blood flow image corresponding to the target area according to the blood flow data.

13. An ultrasonic imaging method Characterized in that It includes: Obtaining multimodal images of a target tissue of a subject to be examined, where the multimodal images include tissue images of the target tissue and blood flow images of blood flow in the target tissue; 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; Outputting a target multimodal image according to the first target display parameter and / or the second target display parameter.

14. The ultrasonic imaging method according to claim 13 Characterized in that The first target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, hue; The second target display parameter includes at least one of the following: transparency, brightness, contrast, saturation, hue.

15. The ultrasonic imaging method according to claim 13 Characterized in that Adjusting the first display parameter of the blood flow image corresponding to the target area to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image corresponding to the target area to obtain a second target display parameter includes: When a preset trigger is triggered, adjusting the first display parameter of the blood flow image corresponding to the target area to obtain a first target display parameter, and / or adjusting the second display parameter of the tissue image corresponding to the target area to obtain a second target display parameter.

16. An ultrasonic imaging system Characterized in that The ultrasonic imaging system includes: An ultrasonic probe; A transmitting / receiving circuit for exciting the ultrasonic probe to transmit ultrasonic waves to biological tissues and receiving echoes of the ultrasonic waves to obtain ultrasonic echo signals; A processor for implementing: The steps of the ultrasonic imaging method according to any one of claims 1 to 15.

Images