Quality control method for instantaneous elasticity measurement and ultrasonic imaging equipment

Abstract

The embodiment of the invention discloses a quality control method for instantaneous elasticity measurement and ultrasonic imaging equipment. A section score is calculated according to the quality control result of the section quality control index of the ultrasonic section image, the section score is displayed, the section score is used for indicating whether the ultrasonic section image is suitable for serving as a reference ultrasonic section image for instantaneous elasticity measurement, and the ultrasonic section image with the section score meeting a preset threshold value serves as the reference ultrasonic section image; probe pre-pressing evaluation information is obtained according to the closeness degree of the probe pre-pressing relative to the preset probe pre-pressing threshold value, the probe pre-pressing evaluation information is displayed, the probe pre-pressing evaluation information is used for indicating whether the probe pre-pressing is suitable for starting the instantaneous elasticity measurement or not, and therefore a user can determine whether multiple items of quality control of the instantaneous elasticity measurement meet the quality control standard or not; quantitative evaluation of multi-item quality control of instantaneous elasticity measurement is realized, the quality of the quality control can be visually displayed, and a green hand or an inexperienced person can control the quality of the multi-item quality control of the instantaneous elasticity measurement more easily.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of medical equipment, and specifically to a quality control method for transient elasticity measurement and an ultrasonic imaging device. Background Art

[0002] Transient elastography is a technology that quantitatively evaluates liver elasticity by detecting the propagation speed of shear waves caused by transient vibration of the probe after they propagate through the body surface to the liver and then into the liver parenchyma. Due to the characteristics of the technology itself, such as non-invasiveness, convenience, low cost, and easy repeatability, it has been used in many departments such as hepatology, ultrasound, and physical examination to detect liver fibrosis and monitor the progression of the disease. It has been widely recognized in clinical practice and has been included in many clinical diagnosis and treatment guidelines for liver fibrosis and hepatitis.

[0003] The accuracy of transient elastography depends on the quality control of the measurement section selection, ROI setting, probe pressure control and other links. The more accurate the measurement section selection, the more reasonable the ROI setting, and the more appropriate the probe pressure, the more accurate the measurement results. However, transient elastography operators are often ultrasound doctors or nurses and physical examination technicians with only a small amount of professional knowledge. They are not fully familiar with the multiple quality control standards of transient elasticity measurement and cannot control the quality of multiple quality control of transient elasticity measurement. During operation, they may obtain inappropriate measurement sections, or the ROI setting is unreasonable, or the probe pressure is too high or too low, which will eventually lead to inaccurate transient elasticity measurement results, which is not conducive to clinical diagnosis. At the same time, more and more complex quality control standards also make it take a long time for novices to get started, the threshold is high, and the training difficulty is increased, which to a certain extent limits the further promotion of transient elastography. Summary of the invention

[0004] The embodiments of the present application provide a quality control method for transient elasticity measurement and an ultrasonic imaging device, which are used to better assist novice or inexperienced operators in performing transient elasticity measurement and improve the measurement efficiency and accuracy of transient elasticity measurement.

[0005] A first aspect of an embodiment of the present application provides a quality control method for transient elasticity measurement, the method comprising:

[0006] Transmitting ultrasonic waves to the target part of the subject, and receiving echoes of the ultrasonic waves to obtain ultrasonic echo signals;

[0007] Obtaining an ultrasonic cross-sectional image according to the ultrasonic echo signal, and displaying the ultrasonic cross-sectional image;

[0008] Acquiring a section quality control index, and determining a quality control result corresponding to the section quality control index based on the ultrasound section image;

[0009] Calculating a section score corresponding to the ultrasound section image according to the quality control result, and displaying the section score, wherein the section score is used to indicate whether the ultrasound section image is suitable as a reference ultrasound section image for transient elasticity measurement;

[0010] Using the ultrasound section image whose section score meets a preset threshold as the reference ultrasound section image;

[0011] Determining a region of interest for performing transient elasticity measurement based on the reference ultrasound section image;

[0012] Determining a probe pre-pressure applied by a user holding a handheld ultrasound probe to the target part;

[0013] Probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to a preset probe pre-pressure threshold value, and the probe pre-pressure evaluation information is displayed. The probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting instantaneous elastic measurement of the region of interest.

[0014] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0015] The ultrasonic imaging device determines the quality control result corresponding to the section quality control index based on the ultrasonic section image, calculates the section score corresponding to the ultrasonic section image according to the quality control result, and displays the section score. The section score is used to indicate whether the ultrasonic section image is suitable as a reference ultrasonic section image for transient elasticity measurement. The ultrasonic section image whose section score meets the preset threshold is used as the reference ultrasonic section image. The region of interest for transient elasticity measurement is determined based on the reference ultrasonic section image, and the probe pre-pressure applied to the target part by the user holding the ultrasonic probe is determined. The probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and the probe pre-pressure evaluation information is displayed. The probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting the transient elasticity measurement of the region of interest. Therefore, the user can determine whether the multiple quality controls of the transient elasticity measurement meet the quality control standards according to the section score and the probe pre-pressure evaluation information, and start the transient elasticity measurement when it meets the quality control standards, so as to obtain accurate measurement values. Therefore, a quantitative evaluation of multiple quality controls of transient elasticity measurement is achieved, and the quality of quality control can be displayed intuitively, making it easier for novices or inexperienced people to control the quality of multiple quality controls of transient elasticity measurement, making the operation of transient elasticity measurement easier to use, and also conducive to the promotion of transient elasticity measurement.

[0016] A second aspect of an embodiment of the present application provides a quality control method for transient elasticity measurement, the method comprising:

[0017] Transmitting ultrasonic waves to the target part of the subject, and receiving echoes of the ultrasonic waves to obtain ultrasonic echo signals;

[0018] Obtaining an ultrasonic image according to the ultrasonic echo signal, and displaying the ultrasonic image;

[0019] Determining image evaluation information corresponding to the ultrasound image based on the ultrasound image, and displaying the image evaluation information, wherein the image evaluation information is used to indicate whether the ultrasound image is suitable as a reference ultrasound image for transient elasticity measurement;

[0020] taking the ultrasound image whose image evaluation information satisfies a preset condition as the reference ultrasound image;

[0021] determining a region of interest for performing transient elasticity measurement based on the reference ultrasound image;

[0022] Determining a probe pre-pressure applied by a user holding a handheld ultrasound probe to the target part;

[0023] Probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to a preset probe pre-pressure threshold value, and the probe pre-pressure evaluation information is displayed. The probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting instantaneous elastic measurement of the region of interest.

[0024] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0025] The ultrasonic imaging device determines the image evaluation information corresponding to the ultrasonic image based on the ultrasonic image, and displays the image evaluation information, the image evaluation information is used to indicate whether the ultrasonic image is suitable as a reference ultrasonic image for transient elasticity measurement, the ultrasonic image whose image evaluation information meets the preset conditions is used as the reference ultrasonic image, the region of interest for transient elasticity measurement is determined based on the reference ultrasonic image, the probe pre-pressure applied by the user holding the ultrasonic probe to the target part is determined, the probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and the probe pre-pressure evaluation information is displayed, and the probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting the transient elasticity measurement of the region of interest. Therefore, the user can determine whether the multiple quality controls of the transient elasticity measurement meet the quality control standards based on the image evaluation information and the probe pre-pressure evaluation information, and start the transient elasticity measurement when it meets the quality control standards, so as to obtain accurate measurement values. Therefore, the evaluation of multiple quality controls of the transient elasticity measurement is realized, the quality of the quality control can be intuitively displayed, and it is easier for novices or inexperienced people to control the quality of multiple quality controls of the transient elasticity measurement, making the operation of the transient elasticity measurement easier to use, and also conducive to the promotion of the transient elasticity measurement.

[0026] A third aspect of the present application provides an ultrasonic imaging device, including:

[0027] Ultrasound probe;

[0028] A transmitting circuit, used for stimulating the ultrasonic probe to transmit ultrasonic waves to a target part of the subject;

[0029] A receiving circuit, used for controlling the ultrasonic probe to receive the ultrasonic echo and obtain an ultrasonic echo signal;

[0030] A processor is used to process the ultrasonic echo signal to obtain an ultrasonic image of the target part, and to perform the quality control method for transient elasticity measurement described in any embodiment of the first aspect or the second aspect based on the ultrasonic image. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic block diagram of an ultrasonic imaging device in an embodiment of the present application;

[0032] Figure 2 A flow chart of a quality control method for transient elasticity measurement in an embodiment of the present application;

[0033] Figure 3 A schematic diagram of a display style of a reference region of interest and a region of interest set by a user in an embodiment of the present application;

[0034] Figure 4 A schematic diagram of a setting method of a reference region of interest in an embodiment of the present application;

[0035] Figure 5 This is an exemplary schematic diagram of an ultrasound cross-sectional image in an embodiment of the present application;

[0036] Figure 6 This is another exemplary schematic diagram of an ultrasound cross-sectional image in an embodiment of the present application;

[0037] Figure 7 This is another exemplary schematic diagram of an ultrasound cross-sectional image in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of a display style of an ultrasound cross-sectional image and a historical ultrasound cross-sectional image in an embodiment of the present application;

[0039] Fig. 9 A schematic diagram of a display style of probe pre-pressure evaluation information in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The embodiments of the present application provide a quality control method for transient elasticity measurement and an ultrasonic imaging device, which are used to better assist novice or inexperienced operators in performing transient elasticity measurement and improve the measurement efficiency and accuracy of transient elasticity measurement.

[0041] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] See also Figure 1 In the embodiment of the present application, the ultrasonic imaging device includes:

[0043] The ultrasonic probe 110 , the transmitting circuit 112 , the receiving circuit 114 , the processor 118 and the display 120 . In addition, the ultrasonic probe 110 , the transmitting circuit 112 , the receiving circuit 114 , the processor 118 and the display 120 , and the transmitting / receiving selection switch 122 , the beamforming module 116 and the memory 124 may also be included.

[0044] The ultrasonic probe 110 can be any probe used for ultrasonic detection, such as a 2D ultrasonic probe and a 3D ultrasonic probe. Among them, the acoustic head part of the ultrasonic probe 110 can be an array composed of multiple array elements, such as multiple array elements arranged in a row to form a linear array, or arranged in a two-dimensional matrix to form a surface array, and multiple array elements can also form a convex array. The above-mentioned array elements are used to emit ultrasonic beams according to the excitation electrical signal, or to convert the received ultrasonic echoes into electrical signals. Therefore, each array element can be used to realize the mutual conversion between the electrical pulse signal and the ultrasonic beam, so as to realize the emission of ultrasonic waves to the target tissue of the human body, and can also be used to receive the echo of the ultrasonic wave reflected back by the tissue.

[0045] The transmitting circuit 112 is used to generate a transmitting sequence according to the control of the transmitting control module of the processor 118, and the transmitting sequence is used to control part or all of the multiple array elements to transmit ultrasonic waves to biological tissues.

[0046] The receiving circuit 114 is used to receive the electrical signal of the ultrasonic echo from the ultrasonic probe 110 , obtain the ultrasonic echo signal, and send the ultrasonic echo signal to the beamforming module 116 .

[0047] The beamforming module 116 is used to perform corresponding delay, weighted summation and beamforming processing on the signal output by the receiving circuit 114. Since the distances from the ultrasonic receiving point to the receiving array element in the measured tissue are different, the channel data of the same receiving point output by different receiving array elements have delay differences, and it is necessary to perform delay processing, align the phases, and perform weighted summation on the different channel data of the same receiving point to obtain the beamformed data.

[0048] Processor 118, which is connected to beamforming module 116, mainly performs detection, signal enhancement, data conversion and logarithmic compression on the beamformed data to form an ultrasound image. The ultrasound image obtained by processor 118 can be displayed on display 120 or stored in memory 124.

[0049] Optionally, the processor 118 may be at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller or a microprocessor, so that the processor 118 can control other components in the ultrasonic imaging device 100 to perform the ultrasonic imaging steps in various embodiments of this specification. The processor 118 may be a component, or may be a general term for a control device and a processing device in an ultrasonic imaging device that can control other components of the ultrasonic imaging device to perform various functions in various embodiments.

[0050] The display 120 is connected to the processor 118, and the display 120 may be a touch screen or a liquid crystal display, etc.; or, the display 120 may be an independent display such as a liquid crystal display or a television set independent of the ultrasound imaging system 100; or, the display 120 may be a display screen of an electronic device such as a smart phone or a tablet computer, etc. The number of the display 120 may be one or more.

[0051] In addition to the above structure, the ultrasonic imaging device 100 may also include a human-computer interaction device. Specifically, the human-computer interaction device may be a display 120. If all functions of the human-computer interaction device are integrated into the display 120, the display 120 may also provide a graphical interface for human-computer interaction to the user when displaying the ultrasonic image. 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, thereby performing corresponding control operations. For example, an icon is displayed on the graphical interface, and the icon can be operated using the human-computer interaction device to perform specific functions, such as swapping the position of the image and / or enlarging a specific area for display.

[0052] The human-machine interaction device may also be other human-machine interaction devices other than the display 120. For example, the human-machine interaction device may include an input device, and the input device is used to detect the user's input information, and the input information may be, for example, instructions for editing and marking ultrasound images, or may also include other types of instructions. The input device may include a keyboard, a scroll wheel, a trackball, a mobile input device (such as a mobile device with a touch screen, a mobile phone, etc.), a multi-function knob, etc., or a combination of multiple thereof. The human-machine interaction device may also include an output device such as a printer.

[0053] The ultrasonic imaging device 100 may further include a memory 124, which is used to store instructions for processing execution, to store received ultrasonic echo signals, to store ultrasonic image data, etc. The memory 124 may be a volatile memory, such as a random access memory (RAM); or a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD); or a combination of the above types of memory, and provides instructions and data to the processor.

[0054] It should be understood that Figure 1 The components included in the ultrasonic imaging device 100 shown are only exemplary, and the ultrasonic imaging device 100 may include more or fewer components, and the present application does not impose corresponding limitations on this.

[0055] The success rate and accuracy of transient elastography are extremely dependent on the operator's experience, especially how to accurately meet the multiple quality controls in the test, which places high demands on the operator. However, the quality control in transient elasticity measurement includes the selection of measurement position, ROI selection, probe preload, respiratory stability, etc. At the same time, some quality controls do not have clear quantitative methods and judgment criteria. Some quality controls, such as ultrasound image quality control, cannot clearly define their quantitative methods and / or judgment criteria, making transient elasticity measurement operations complicated, time-consuming and prone to errors, resulting in an increase in failure rate and a decrease in repeatability.

[0056] Secondly, ultrasound doctors or nurses are not fully familiar with the multiple quality control standards of transient elasticity measurement, and are unable to control the quality of multiple quality controls of transient elasticity measurement. They may obtain inappropriate measurement sections during operation, or the ROI setting may be unreasonable, or the probe pressure may be too high or too low, which will eventually lead to inaccurate transient elasticity measurement results, which is not conducive to clinical diagnosis. At the same time, more and more complex quality control standards also make it take a long time for novices to get started, with high thresholds, and increase the difficulty of training. Novices are very likely to miss key quality control points due to difficulty in making choices, which increases the difficulty of training and is not conducive to the promotion of transient elasticity measurement. These two points are also the main criticisms of transient elasticity measurement in current clinical practice.

[0057] In order to solve the above technical problems, the quality control method of the instantaneous elasticity measurement performed by the ultrasonic imaging device will be further described in detail below based on the specific structural composition of the aforementioned ultrasonic imaging device and the functions of each structure. Figure 2 As shown, an embodiment of the quality control method for transient elasticity measurement of the embodiment of the present application includes:

[0058] 201. Transmitting an ultrasonic wave to a target part of a subject, and receiving an echo of the ultrasonic wave to obtain an ultrasonic echo signal;

[0059] The target part can be the liver of the subject, and the user can use the ultrasonic probe to perform ultrasonic scanning on the target part of the subject. The ultrasonic imaging device transmits ultrasonic waves to the target part of the subject based on the ultrasonic probe, receives the echo of the ultrasonic waves, and obtains ultrasonic echo signals based on the echo of the ultrasonic waves. Among them, the quality control method and ultrasonic imaging device for transient elasticity measurement provided by the present application can be applicable to the human body and various animals, that is, the subject can be the human body or various animals.

[0060] 202. Obtain an ultrasonic cross-sectional image according to the ultrasonic echo signal, and display the ultrasonic cross-sectional image;

[0061] The ultrasonic imaging device can process the ultrasonic echo signal based on the beamforming module and the processor in the aforementioned structure to obtain an ultrasonic cross-sectional image, and can display the ultrasonic cross-sectional image.

[0062] 203. Acquire a section quality control index, and determine a quality control result corresponding to the section quality control index based on the ultrasound section image;

[0063] The section quality control index refers to an index used to evaluate the quality of the ultrasound section image. The index can be any index that can affect the instantaneous elasticity measurement in the section corresponding to the ultrasound section image, for example, it can be the proportion of the solid tissue area in the section, or the proportion of the non-solid tissue area in the section, or the matching degree between the ultrasound section image and the historical ultrasound section image.

[0064] The impact of the quality control results of the section quality control indicators on the transient elasticity measurement may be to improve the accuracy of the measured value of the transient elasticity measurement, or to reduce the accuracy of the measured value of the transient elasticity measurement, or to affect other aspects of the transient elasticity measurement. For example, for the section quality control indicator of the proportion of non-substantial tissue area in the section, if its quality control result is that the proportion is lower than the preset threshold, it indicates that most of the tissue area corresponding to the section may contain non-substantial structures such as blood vessels and fat layers, which are not conducive to shear wave propagation, and will interfere with the shear wave propagation, thereby reducing the accuracy of the measured value of the transient elasticity measurement.

[0065] 204. Calculate a section score corresponding to the ultrasonic section image according to the quality control result, and display the section score, wherein the section score is used to indicate whether the ultrasonic section image is suitable as a reference ultrasonic section image for transient elasticity measurement;

[0066] After obtaining the quality control results of the section quality control indicators, the section score of the ultrasound section image can be calculated based on the quality control results of the section quality control indicators. The section score is used to indicate whether the ultrasound section image is suitable as a reference ultrasound section image for instantaneous elasticity measurement. The user can then determine whether the ultrasound section image currently scanned is qualified based on the section score.

[0067] 205. Using the ultrasound section image whose section score meets a preset threshold as the reference ultrasound section image;

[0068] The section score of the ultrasound section image represents the probability that the ultrasound section image is a suitable or accurate ultrasound section image, that is, it represents the suitability of the ultrasound section image for transient elasticity measurement. Therefore, the ultrasound section image whose section score meets the preset threshold has a high probability of being an accurate ultrasound section image, which can improve the accuracy of the measured value of transient elasticity measurement, and thus can be used as a reference ultrasound section image for transient elasticity measurement.

[0069] 206. Determine a region of interest for performing transient elasticity measurement based on the reference ultrasonic section image;

[0070] In order to perform instantaneous elasticity measurement, the ultrasonic imaging device can also determine the region of interest in the reference ultrasonic section image. The region of interest here can be determined automatically by the ultrasonic imaging device; or it can be a setting operation of the region of interest input by the user, and the ultrasonic imaging device determines the region of interest according to the setting operation of the user. This embodiment does not limit the way in which the ultrasonic imaging device determines the region of interest. The region of interest mentioned in this application can be a closed area surrounded by a square, circle or irregular shape, or it can be a non-closed area / position delineated by lines. The specific form of the region of interest is not limited here.

[0071] Among them, personnel can set rules for determining appropriate regions of interest, such as setting multiple rules for determining regions of interest by avoiding non-substantial areas of the target site, determining regions of interest in substantial areas of the target site, and so on. The ultrasonic imaging device can automatically determine the regions of interest according to the rules set by the personnel, thereby obtaining regions of interest suitable for transient elasticity measurement.

[0072] 207. Determine the probe pre-pressure applied by the user holding the ultrasound probe to the target part;

[0073] 208. Obtaining probe pre-pressure evaluation information according to the proximity of the probe pre-pressure to a preset probe pre-pressure threshold, and displaying the probe pre-pressure evaluation information, wherein the probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting instantaneous elasticity measurement of the region of interest;

[0074] Based on the technical principles and clinical experience of transient elasticity measurement, if the probe preload (i.e., the pressure applied by the operator holding the ultrasound probe to the target part) is not within the appropriate range, it will cause the acoustic head to vibrate and deform, causing the shear wave frequency and amplitude to change, resulting in changes in the measured value of transient elasticity measurement, affecting the diagnosis. Therefore, the probe preload should be within a reasonable range.

[0075] Therefore, the ultrasonic imaging device can determine the probe pre-pressure applied by the user holding the ultrasonic probe to the target part, obtain the probe pre-pressure evaluation information according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and display the probe pre-pressure evaluation information. The probe pre-pressure evaluation information can be used to characterize the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and can indicate whether the probe pre-pressure is suitable for starting the transient elasticity measurement of the region of interest. Among them, the preset probe pre-pressure threshold can be a probe pre-pressure suitable for transient elasticity measurement, and its specific value can be derived based on the technical principle of transient elasticity measurement, or based on clinical experience summary, which is not limited here.

[0076] Since both the section score and the probe preload evaluation information can indicate whether the transient elasticity measurement is suitable, that is, the section score and the probe preload evaluation information can be used to indicate whether the conditions for starting the transient elasticity measurement of the above-mentioned region of interest are met, the user can determine whether the transient elasticity measurement can be started based on these two pieces of information. When both the section score and the probe preload evaluation information indicate that the conditions for starting the transient elasticity measurement of the above-mentioned region of interest are met, it means that the quality control of the section, the quality control of the region of interest, and the quality control of the probe preload in the transient elasticity measurement have reached a high quality, and even meet the corresponding quality control standards. At this time, the transient elasticity measurement can be started and accurate measurement values ​​can be obtained.

[0077] In this embodiment, the ultrasonic imaging device determines the quality control result corresponding to the section quality control index based on the ultrasonic section image, calculates the section score corresponding to the ultrasonic section image according to the quality control result, and displays the section score, the section score is used to indicate whether the ultrasonic section image is suitable as a reference ultrasonic section image for transient elasticity measurement, the ultrasonic section image whose section score meets the preset threshold is used as the reference ultrasonic section image, the region of interest for transient elasticity measurement is determined based on the reference ultrasonic section image, the probe pre-pressure applied to the target part by the user holding the ultrasonic probe is determined, the probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and the probe pre-pressure evaluation information is displayed, the probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting the transient elasticity measurement of the region of interest. Therefore, the user can determine whether the multiple quality controls of the transient elasticity measurement meet the quality control standards according to the section score and the probe pre-pressure evaluation information, and start the transient elasticity measurement when it meets the quality control standards, so as to obtain accurate measurement values. Therefore, a quantitative evaluation of multiple quality controls of transient elasticity measurement is achieved, and the quality of quality control can be displayed intuitively, making it easier for novices or inexperienced people to control the quality of multiple quality controls of transient elasticity measurement, making the operation of transient elasticity measurement easier to use, and also conducive to the promotion of transient elasticity measurement.

[0078] based on Figure 2 In the illustrated embodiment, in a preferred implementation manner, the region of interest in the reference ultrasound section image for performing transient elasticity measurement can be determined according to the user's setting operation of the region of interest. Specifically, the ultrasound imaging device receives the user's setting operation of the region of interest for the reference ultrasound section image, displays the region of interest set by the user in real time in the reference ultrasound section image according to the region of interest setting operation, calculates the region of interest score of the region of interest set by the user, and displays the region of interest score, which can be used to indicate whether the region of interest set by the user is suitable as the region of interest for transient elasticity measurement, and further determines the region of interest set by the user whose region of interest score meets a preset threshold as the region of interest for performing transient elasticity measurement.

[0079] That is, the user can set a region of interest in the reference ultrasound section image, and the ultrasound imaging device calculates the region of interest score of the region of interest set by the user in real time, and the user can determine whether the currently set region of interest is suitable for transient elasticity measurement through the score. When the region of interest score meets the preset threshold, the ultrasound imaging device determines that the region of interest set by the user whose region of interest score meets the preset threshold can be used for transient elasticity measurement.

[0080] For example, Figure 3A display style of a reference ROI and a ROI set by a user is shown. As shown in the figure, the ultrasound imaging device receives the user's ROI setting operation on the reference ultrasound section image, and displays the user's ROI set in real time on the reference ultrasound section image according to the ROI setting operation (i.e., the area corresponding to the rectangular box pointed to by the "current ROI setting" in the figure), and can calculate the ROI score of the user-set ROI and display the ROI score. The figure shows the ROI score Q ROI = 65. If the score of the region of interest meets the preset threshold, the region of interest set by the user can be used for instantaneous elasticity measurement.

[0081] Therefore, quantitative quality control evaluation of the ROI area selected by the user can be achieved. The user can directly determine whether the ROI area set by himself is appropriate based on the score of the region of interest obtained by quantitative calculation. The quality control evaluation method of ROI selection is more intuitive and easier for novices or inexperienced people to control the quality of ROI selection.

[0082] Of course, as mentioned above, in addition to the user setting the ROI, the ultrasound imaging device may also determine the ROI region in the reference ultrasound section image according to a preset determination rule, which is not limited here.

[0083] In another preferred implementation of this embodiment, the user may be prompted and guided to set the region of interest. Specifically, the ultrasound imaging device may determine the reference region of interest in the reference ultrasound section image based on the image features of the reference ultrasound section image, and the image features may include one or more of the scanning position of the reference ultrasound section image, the position of the substantial tissue region of the target part in the reference ultrasound section image, and the position of the non-substantial tissue region of the target part in the reference ultrasound section image, and then display the reference region of interest in the reference ultrasound section image to guide the user to set the region of interest.

[0084] Among them, the reference region of interest can be a region of interest suitable for instantaneous elasticity measurement. For example, the ultrasonic imaging device can determine the reference region of interest based on the scanning position of the reference ultrasonic section image, the position of the substantial tissue area of ​​the target part in the reference ultrasonic section image, or the position of the non-substantial tissue area of ​​the target part in the reference ultrasonic section image, so that the reference region of interest avoids the non-substantial area of ​​the target part and makes the reference region of interest in the substantial area of ​​the target part, thereby ensuring that the propagation of shear waves in the reference region of interest is stable and does not experience significant attenuation, so that the reference region of interest is suitable for instantaneous elasticity measurement.

[0085] For example, ROI should be set in an area where shear wave propagation is relatively stable to obtain more accurate measurements. Therefore, ROI should be as far away as possible from tissue structures that are prone to shear wave propagation interference, such as liver capsule, liver edge, fat layer, and large blood vessels, and should be selected as far as possible in the shallow part of the tissue where shear wave attenuation is small.

[0086] In a preferred embodiment, the reference region of interest may be determined by determining the left and right edges of the reference region of interest based on the ultrasonic transmission and reception position of the ultrasonic probe, wherein the center of the reference region of interest coincides with the central position of the ultrasonic probe; determining the upper edge of the reference region of interest based on the non-substantial position of the target part in the reference ultrasonic section image; determining the lower edge of the reference region of interest based on the position of the upper edge and a preset length of the region of interest, or determining the lower edge of the reference region of interest based on the position of the blood vessel crossing in the reference ultrasonic section image; and determining the reference region of interest based on the left and right edges, the upper edge, and the lower edge.

[0087] like Figure 4 As shown, the setting method of the reference region of interest can be that the left and right edges of the ROI can be set to the range where the energy transmission and reception of the probe is relatively concentrated (usually 6 to 8 mm to the left and right of the center of the probe), and the center of the ROI coincides with the center of the probe; the upper edge of the ROI can be set at a suitable distance from the lower edge of the fat layer (usually 1 to 2 cm); the lower edge of the ROI can be set at a preset length away from its upper edge, such as the lower edge is set at a position 4 cm away from the upper edge, that is, the distance between the upper and lower edges is 4 cm, and the length of the ROI is 4 cm; or, the position of the lower edge of the reference region of interest should ensure that the area formed by the upper and lower edges avoids the position where the blood vessels cross in the reference ultrasound section image, ensuring that there are no blood vessels crossing the ROI. After determining the upper and lower edges and left and right edges of the reference region of interest, the position and size of the region of interest can be determined.

[0088] Therefore, by determining the reference ROI in this way, it can be ensured that the reference ROI falls within the substantial area of ​​the tissue and avoids the non-substantial area of ​​the tissue. At the same time, it can also avoid excessive shear wave attenuation caused by the ROI being too deep, thereby ensuring stable shear wave propagation and the accuracy of transient elasticity measurement.

[0089] like Figure 3 As shown, after the ultrasonic imaging device determines the reference region of interest, it can display the reference region of interest (i.e., the area corresponding to the rectangular box pointed to by the "optimal ROI setting area" in the figure) in the reference ultrasonic section image, so that the user can set the region of interest of the reference ultrasonic section image suitable for instantaneous elasticity measurement according to the position of the reference region of interest.

[0090] In another preferred embodiment, after displaying the region of interest set by the user, the ultrasonic imaging device may also display region of interest adjustment guidance information according to the region of interest set by the user and the reference region of interest, and the region of interest adjustment guidance information is used to prompt the user to adjust the position and / or size of the region of interest set by the user. For example, if the position of the region of interest set by the user is above the position of the reference region of interest, the user is prompted to adjust the position of the region of interest set by the user downward; similarly, if it is below, the user is prompted to adjust the position of the region of interest set by the user upward. Alternatively, if the width of the region of interest set by the user is smaller than the width of the reference region of interest, the user is prompted to increase the width of the region of interest set by the user; similarly, if it is larger, the user is prompted to reduce the width of the region of interest set by the user.

[0091] like Figure 3 As shown, the ultrasonic imaging device can compare the position difference and size difference between the reference ROI and the ROI set by the user. If the position of the ROI set by the user is lower than the position of the reference ROI, the guidance information is displayed, such as "ROI moves up 0.8cm" and other similar words; if the size of the ROI set by the user is not significantly different from the size of the reference ROI, and the left and right edges are close to the left and right edges of the reference ROI, the words "keep ROI size, left and right position unchanged" and other similar words can be displayed. Therefore, by displaying the guidance information, the user can clearly know how to adjust the real-time ROI, which is more convenient for the user to adjust the ROI.

[0092] Therefore, the user can adjust the region of interest set by the user according to the prompt of the guidance information, which is convenient for the user to adjust so that the region of interest set by the user is closer to or even coincides with the reference region of interest.

[0093] When displaying the region of interest set by the user and the reference region of interest on the reference ultrasound section image, the region of interest set by the user and the reference region of interest may be displayed separately to facilitate the user to identify the two. For example, the region of interest set by the user may be displayed in a first display style on the reference ultrasound section image, and the reference region of interest may be displayed in a second display style on the reference ultrasound section image, and the second display style is different from the first display style.

[0094] The difference between the first display style and the second display style may be a difference in display borders, or a difference in colors, or a difference in patterns or graphics, or a difference in other visual effects, which is not limited here.

[0095] like Figure 3As shown, after determining the reference region of interest, the ultrasound imaging device can display the reference region of interest in the reference ultrasound section image, and the display style of the reference region of interest is different from the display style of the region of interest set by the user. For example, the rectangular box pointed to by the "optimal ROI setting area" in the figure and the rectangular box pointed to by the "current ROI setting" in the figure may have different border lines in thickness and color, or different filling colors or filling patterns inside the rectangular boxes. For example, the rectangular box pointed to by the "optimal ROI setting area" in the figure is filled with transparent red, while the rectangular box pointed to by the "current ROI setting" in the figure may be unfilled, so that the user can easily identify the two regions of interest.

[0096] Therefore, by displaying the ROI set by the user and the reference ROI separately, the user can easily identify the positions of the two and compare the size difference between the two, and it is also convenient for the user to adjust the ROI set by the user based on the reference ROI.

[0097] Therefore, through the above-mentioned multiple preferred embodiments, the user can set the user-set region of interest for transient elasticity measurement according to the position of the reference region of interest, so that the set user-set region of interest is close to or consistent with the reference region of interest, thereby ensuring that the user-set region of interest set by the user is suitable for transient elasticity measurement.

[0098] At the same time, the user sets the user-set region of interest according to the reference region of interest, so that the user can understand and master how to set a region of interest suitable for transient elastic measurement. Therefore, it can be applied to the teaching and training of novices or inexperienced people, so that novices and inexperienced people can learn how to set a suitable ROI, which is more conducive to the promotion and use of transient elastic measurement.

[0099] In this embodiment, there are multiple ways to calculate the region of interest score of the region of interest set by the user. One way is to calculate the region of interest score of the region of interest set by the user according to the matching degree of the region of interest set by the user and the reference region of interest. The matching degree of the region of interest set by the user and the reference region of interest can be represented by the intersection ratio of the region of interest set by the user and the reference region of interest; or represented by the ratio of the intersection of the region of interest set by the user and the reference region of interest to the area of ​​the reference region of interest, which is represented by the following formula:

[0100] Region of Interest Score

[0101] Of course, the matching degree may also be calculated in other ways, as long as the matching degree can represent the degree of overlap between the region of interest set by the user and the reference region of interest.

[0102] Another way to calculate the score of the region of interest is to determine the score of the region of interest according to the proportion of the parenchymal tissue area and / or the proportion of the non-parenchymal tissue area of ​​the target part in the region of interest set by the user. The parenchyma of the target part is such as the liver parenchyma of the liver, the parenchyma of the pancreas, etc., and the non-parenchyma can be non-parenchymal structures such as the liver capsule, the liver edge, the fat layer, and the large blood vessels.

[0103] For example, it can be expressed as follows:

[0104] Region of Interest Score

[0105] Alternatively, the region of interest score

[0106] Alternatively, the calculation formula for the region of interest score of the region of interest set by the user can also be expressed as

[0107]

[0108] Of course, the ROI score may also be calculated based on a variation of the above formula, as long as the calculated ROI score can describe the suitability of the ROI set by the user for instantaneous elasticity measurement, which is not limited here.

[0109] In addition, in the above-mentioned multiple preferred methods, displaying the reference region of interest, displaying the region of interest score, and displaying the guide information can be executed simultaneously, or only one or two of them can be executed. For example, for an operator with certain experience in transient elasticity measurement, the region of interest score of the region of interest set by the user can know whether the region of interest set by the user meets the requirements of transient elasticity measurement, and know how to adjust the region of interest when it does not meet the requirements. At this time, the above information can also be not displayed to make the interface display simple. Alternatively, whether the above-mentioned reference region of interest, region of interest score, region of interest adjustment guide information and other information are displayed can be set by the user according to needs, which is not limited here.

[0110] Based on the technical principles and clinical experience of transient elasticity measurement, the section suitable for transient elasticity measurement should meet the conditions of optimal shear wave propagation and minimal interference in measurement, so the section with the largest proportion of liver parenchyma and the least interference (mainly blood vessels, fat layer, etc.) within the effective shear wave propagation range (or measurement range) should be selected for measurement. Based on this, this embodiment proposes multiple calculation methods for section scores.

[0111] The more liver parenchyma, the thinner the fat layer, and the fewer blood vessels, the higher the section score, which means that the section is more suitable for shear wave propagation, the less interference the measurement is subject to, and the more suitable it is as a measurement section for instantaneous elasticity measurement. Therefore, in one calculation method, the section score can be used to characterize the proportion of the solid tissue area and / or the proportion of the non-solid tissue area of ​​the target part in the ultrasound section image, and correspondingly, the section quality control index of the ultrasound section image can be the proportion of the solid tissue area and / or the proportion of the non-solid tissue area of ​​the target part in the ultrasound section image. Then, the quality control result corresponding to the section quality control index is determined based on the ultrasound section image, and the ultrasound imaging device can determine the solid tissue area and / or non-solid tissue area of ​​the target part in the ultrasound section image according to the image characteristics of the ultrasound section image, and determine the proportion of the solid tissue area and / or the proportion of the non-solid tissue area in the ultrasound section image. Therefore, each time the ultrasound section image is obtained, the ultrasound imaging device can calculate the section score of the ultrasound section image according to the substantial proportion and / or non-substantial proportion of the target part in the ultrasound section image, and determine whether the section score of the ultrasound section image meets the preset threshold; if so, the ultrasound section image is used as a reference ultrasound section image; if not, the determination is continued as to whether the section score of the ultrasound section image obtained next time meets the preset threshold, until an ultrasound section image whose section score meets the preset threshold is obtained.

[0112] Another way to calculate the section score is that the section score can be used to characterize the matching degree between the ultrasonic section image and the pre-obtained historical ultrasonic section image, and the historical ultrasonic section image is a pre-scanned ultrasonic section image suitable for instantaneous elasticity measurement. Correspondingly, the section quality control index of the ultrasonic section image can be the matching degree between the ultrasonic section image and the pre-obtained historical ultrasonic section image. Then, the quality control result corresponding to the section quality control index is determined based on the ultrasonic section image, and the ultrasonic imaging device can obtain the historical ultrasonic section image and calculate the matching degree between the ultrasonic section image and the historical ultrasonic section image. Therefore, the ultrasonic imaging device can determine the section score of the ultrasonic section image according to the matching degree between the ultrasonic section image and the historical ultrasonic section image each time the ultrasonic section image is obtained, and judge whether the section score of the ultrasonic section image meets the preset threshold; if so, the ultrasonic section image is used as a reference ultrasonic section image; if not, it continues to judge whether the section score of the next ultrasonic section image obtained meets the preset threshold until an ultrasonic section image whose section score meets the preset threshold is obtained.

[0113] Among them, after obtaining the historical ultrasonic section image, if the user receives an ultrasonic scanning operation of the target part with a handheld ultrasonic probe, the ultrasonic imaging device can also obtain the scanning position of the historical ultrasonic section image and the scanning position of the current ultrasonic probe, and display the scanning guidance information according to the scanning position of the historical ultrasonic section image and the scanning position of the current ultrasonic probe. The scanning guidance information is used to prompt the user to adjust the position of the scanning section to obtain a reference ultrasonic section image suitable for instantaneous elasticity measurement.

[0114] The adjustment of the position of the scanning section may be to adjust the scanning position or scanning direction of the ultrasound probe, thereby changing the position of the scanning section corresponding to the ultrasound section image; or the ultrasound probe may not be moved, but only the position of the subject is moved, so that the ultrasound probe scans other positions of the target part or changes the scanning direction of the ultrasound probe, so as to change the position of the scanning section corresponding to the ultrasound section image. This embodiment does not limit the method of adjusting the position of the scanning section.

[0115] In addition, the ultrasound imaging device may also display historical ultrasound section images, and / or display the matching degree between the ultrasound section image and the historical ultrasound section images and the section score calculated based on the matching degree.

[0116] Figures 5 to 7 Each of them is a schematic diagram of an ultrasound section image. As shown in the figure, the ultrasound imaging device can calculate the section score of the ultrasound section image based on the ultrasound section image and can display the section score so that the user can determine whether the ultrasound section image is suitable for instantaneous elasticity measurement based on the section score.

[0117] Figure 8 A display style of ultrasound section images and historical ultrasound section images is shown. As shown in the figure, the ultrasound imaging device can display the real-time ultrasound section image, that is, the section image corresponding to the "current scanning section" in the figure; and display the historical ultrasound section image, that is, the section image corresponding to the "optimal measurement section" in the figure; it can also display the matching degree between the ultrasound section image and the historical ultrasound section image (that is, the "section overlap: 64%" in the figure); it can also display the section score of the ultrasound section image, such as the "section selection: Q P =75", this section score can be determined based on the matching degree between the ultrasound section image and the historical ultrasound section image, or can be calculated based on the solid proportion and / or non-solid proportion of the target part in the ultrasound section image.

[0118] In addition, the ultrasonic imaging device can also display scanning guidance information based on the scanning position of the historical ultrasonic section image and the scanning position of the current ultrasonic probe. For example, if the scanning position of the current ultrasonic probe is lower and left relative to the scanning position of the historical ultrasonic section image, the probe movement direction is prompted to be upward and rightward as shown in the figure, so that the ultrasonic section image obtained based on the scanning position of the current ultrasonic probe is closer to the historical ultrasonic section image, thereby improving the matching degree with the historical ultrasonic section image.

[0119] It should be noted that displaying historical ultrasound section images, displaying matching degree, and displaying probe movement guidance information can be performed simultaneously, or only one or two of them can be performed. For example, for an operator with certain experience in transient elasticity measurement, the section score of the ultrasound section image can tell whether the ultrasound section image meets the requirements of transient elasticity measurement, and how to adjust the ultrasound section image when it does not meet the requirements. At this time, the above information can also be not displayed to make the interface display simple. Alternatively, whether the above-mentioned historical ultrasound section images, matching degree, and probe movement guidance information are displayed can be set by the user according to needs, and is not limited here.

[0120] The ultrasonic imaging device can determine the historical ultrasonic section image from multiple ultrasonic section images. Specifically, the user can scan and obtain multiple ultrasonic section images, and the multiple ultrasonic section images also include candidate ultrasonic section images for determining the historical ultrasonic section image. The ultrasonic imaging device can calculate the section score of the candidate ultrasonic section image according to the proportion of the solid tissue area of ​​the target part and / or the proportion of the non-solid tissue area in the candidate ultrasonic section image, and then determine the candidate ultrasonic section image with the highest section score and meeting the preset threshold value from the multiple candidate ultrasonic section images as the historical ultrasonic section image.

[0121] In this embodiment, the calculation of the section score corresponding to the ultrasound section image can be performed in real time when the ultrasound section image is obtained, so that the user can quickly know whether the currently scanned section is suitable for instantaneous elasticity measurement, and can also enhance the user's experience of using the ultrasound imaging device.

[0122] In another preferred implementation of the present embodiment, after determining with reference to the ultrasonic section image, if the probe pre-pressure is greater than a preset probe pre-pressure threshold and the difference between the two exceeds a first acceptable fluctuation range of the probe pre-pressure, the ultrasonic imaging device may further display a first guidance information, and the first guidance information is used to guide the user to reduce the probe pre-pressure; if the probe pre-pressure is less than the preset probe pre-pressure threshold and the difference between the two exceeds a second acceptable fluctuation range of the probe pre-pressure, the second guidance information is displayed, and the second guidance information is used to guide the user to increase the probe pre-pressure.

[0123] In another preferred implementation of the present embodiment, after determining with reference to the ultrasonic section image, when the probe pre-pressure evaluation information satisfies the requirement for initiating transient elastic measurement of the region of interest, or when the probe pre-pressure is adjusted to a value whose difference from a preset probe pre-pressure threshold is within an acceptable fluctuation range of the probe pre-pressure, the ultrasonic imaging device may also display a prompt message that the probe pre-pressure satisfies the requirement for initiating transient elastic measurement of the region of interest.

[0124] In this embodiment, the probe pre-pressure evaluation information can be expressed in a variety of forms, which can be expressed in the form of a score value, or in the form of text, such as a text description of appropriate probe pre-pressure, a text description of too high or too low probe pre-pressure, or a graphic representation of the suitability of the probe pre-pressure, etc. Therefore, when displaying the probe pre-pressure evaluation information, the ultrasonic imaging device can calculate the probe pre-pressure score according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and display the probe pre-pressure score; or, when displaying the probe pre-pressure evaluation information, the first area in the preset graphic is displayed in a third display style, and other areas in the preset graphic except the first area are displayed in a display style different from the third display style.

[0125] Among them, the proportion and / or color of the first area in the preset graph is determined according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold or the above-mentioned probe pre-pressure score, and the proportion and / or color is used to indicate the suitability of the probe pre-pressure for instantaneous elasticity measurement.

[0126] The proportion can be the percentage of the probe preload score to a preset maximum score (such as a preset maximum score of 100 points). The proportion of the first area represents the suitability of the probe preload for instantaneous elasticity measurement. The larger the proportion, the higher the suitability of the probe preload for instantaneous elasticity measurement; otherwise, the lower the suitability.

[0127] Among them, when calculating the probe pre-pressure score according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, the difference between the real-time probe pre-pressure and the preset probe pre-pressure threshold can be calculated, and then the ratio of the difference to the preset acceptable fluctuation range is used as the probe pre-pressure score. The preset probe pre-pressure threshold can be the optimal probe pre-pressure, and the acceptable fluctuation range can be the difference between the maximum and minimum values ​​of the probe pre-pressure (that is, the acceptable left and right fluctuation range of the preset probe pre-pressure threshold). It is expressed as follows:

[0128] Probe preload score

[0129] It is worth noting that the above formula is only one feasible calculation method. Other variations of the above formula or other calculation methods used to express the degree of proximity between the probe pre-pressure and the preset probe pre-pressure threshold are also acceptable. As long as the formula or method can be used to quantitatively or semi-quantitatively evaluate the probe pre-pressure size, it is not limited here.

[0130] Fig. 9 A display style showing probe preload evaluation information. The ultrasonic imaging device can show the probe preload evaluation information in the form of a score, that is, display the probe preload score. As shown in the figure, "Probe preload: Q Pre =80", that is, the probe preload score is 80 points. The suitability of the probe preload can also be expressed in a graphical form, that is, the percentage of the probe preload score to the preset maximum score is calculated, and the first area in the preset graphic that accounts for the percentage is determined. As shown in the figure, the preset graphic is a ring, which includes 5 parts. Since the probe preload score accounts for 80% of the preset maximum score (such as 100 points), 80% of the ring is determined as the first area, that is, the 4 parts of the ring are used as the first area, and the first area is filled with green, while other areas are not filled with green to distinguish them. Therefore, the user can determine the suitability of conducting instantaneous elasticity measurement based on this probe preload through the proportion of the first area. The larger the proportion, the greater the suitability, that is, the more suitable the probe preload is for instantaneous elasticity measurement.

[0131] Similarly, the first area can also be represented by a star-shaped graphic. The star-shaped graphic is composed of 5 identical star-shaped graphics. Then the area accounting for 80% of the star-shaped graphics is 4 of the 5 star-shaped graphics. These 4 star-shaped graphics can be filled with colors, while the remaining 1 star-shaped graphic may not be filled with colors to distinguish them. Users can also know the suitability of the startup instantaneous elasticity measurement represented by the probe preload evaluation information through the display style of this star-shaped graphic.

[0132] Of course, in addition to graphics such as rings and star-shaped graphics, other graphics can also be used to represent the probe preload evaluation information, which is not limited here. Different areas in the preset graphics are displayed in different display styles. In addition to the aforementioned partial area filling color and partial area not filling color, other ways of display can also be used, such as displaying the borders of different areas with different thicknesses or different line shapes. This embodiment does not limit the way of displaying the different areas in the preset graphics.

[0133] The color of the first area in the preset graph is determined according to the proximity of the probe preload to the preset probe preload threshold or the above-mentioned probe preload score, and the color is used to indicate the suitability of the instantaneous elasticity measurement based on the current probe preload. For example, when the probe preload score indicates that it is suitable to start the instantaneous elasticity measurement of the region of interest, the first area is filled with green; when the probe preload score indicates that it is not suitable to start the instantaneous elasticity measurement of the region of interest (such as the probe preload is too large or too small), the first area is filled with red. Therefore, the user can determine whether the current probe preload is suitable for starting the instantaneous elasticity measurement by the suitability represented by the color of the first area.

[0134] In addition, if the probe pre-pressure is greater than the preset probe pre-pressure threshold and the difference between the two exceeds the first acceptable fluctuation range of the probe pre-pressure, the ultrasound imaging device may display a first guidance message to guide the user to reduce the probe pre-pressure, such as "the probe is slightly away from the skin" or other words of similar meaning as shown in the figure. Similarly, if the probe pre-pressure is less than the preset probe pre-pressure threshold and the difference between the two exceeds the second acceptable fluctuation range of the probe pre-pressure, the second guidance message is displayed to guide the user to increase the probe pre-pressure.

[0135] It should be noted that for a doctor with some experience, when he knows that the probe pre-pressure score is not ideal, he will know that the probe pre-pressure is too high or too low, and can then adjust the probe pre-pressure independently. In this case, the present embodiment may only display the probe pre-pressure evaluation information, and may not display the guidance information for the probe pre-pressure adjustment. This is not limited here.

[0136] In another preferred implementation of the present embodiment, after the region of interest for performing transient elasticity measurement is determined and the probe pre-pressure evaluation information satisfies the requirements for initiating transient elasticity measurement of the region of interest, the ultrasonic imaging device can automatically initiate transient elasticity measurement of the region of interest of the reference ultrasonic section image, i.e., control the ultrasonic probe to emit ultrasonic waves to the tissue corresponding to the region of interest of the reference ultrasonic section image to perform transient elasticity measurement and obtain the measurement result of the transient elasticity measurement.

[0137] Another preferred embodiment may be that after the region of interest for transient elasticity measurement is determined and the probe pre-pressure evaluation information meets the requirements for starting the transient elasticity measurement of the region of interest, the ultrasonic imaging device displays a prompt message for starting the transient elasticity measurement of the region of interest, so that the user can manually start the transient elasticity measurement according to the prompt message.

[0138] Among them, the probe pre-pressure evaluation information meets the requirements for initiating instantaneous elastic measurement of the region of interest. It can be that the difference between the probe pre-pressure and the preset probe pre-pressure threshold is within the acceptable fluctuation range of the probe pre-pressure (such as the first acceptable fluctuation range or the second acceptable fluctuation range mentioned above), or the probe pre-pressure score meets the preset threshold, which is not limited here.

[0139] In this embodiment, by scoring and providing operation prompts for the whole process quality control of the section selection, ROI setting and probe preload control links in the acquisition preparation state of the transient elasticity measurement, the operator can obtain a better liver scanning image, and can easily and accurately reach the optimal or better startup state of the transient elasticity measurement, thereby obtaining more accurate measurement values. This can not only standardize the operation process and unify the quality control standards, but also provide real-time prompts for the correction direction of operations such as section selection, ROI setting and probe preload control, effectively reducing the difficulty for novices to get started and improving the accuracy and repeatability of the transient elasticity measurement.

[0140] Another embodiment of the quality control method for transient elasticity measurement of the embodiment of the present application includes:

[0141] Transmitting ultrasonic waves to the target part of the subject, and receiving the echo of the ultrasonic waves to obtain ultrasonic echo signals;

[0142] Obtaining an ultrasonic image according to the ultrasonic echo signal, and displaying the ultrasonic image;

[0143] Determining image evaluation information corresponding to the ultrasound image based on the ultrasound image, and displaying the image evaluation information, wherein the image evaluation information is used to indicate whether the ultrasound image is suitable as a reference ultrasound image for transient elasticity measurement;

[0144] taking the ultrasound image whose image evaluation information meets the preset conditions as the reference ultrasound image;

[0145] determining a region of interest for performing transient elasticity measurement based on a reference ultrasound image;

[0146] Determine the probe pre-pressure applied by the user holding the ultrasound probe to the target site;

[0147] Probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to a preset probe pre-pressure threshold value and displayed. The probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting instantaneous elastic measurement of the region of interest.

[0148] In this embodiment, the ultrasonic imaging device determines the image evaluation information corresponding to the ultrasonic image based on the ultrasonic image, and displays the image evaluation information, the image evaluation information is used to indicate whether the ultrasonic image is suitable as a reference ultrasonic image for transient elasticity measurement, the ultrasonic image whose image evaluation information meets the preset conditions is used as the reference ultrasonic image, the region of interest for transient elasticity measurement is determined based on the reference ultrasonic image, the probe pre-pressure applied to the target part by the user holding the ultrasonic probe is determined, the probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and the probe pre-pressure evaluation information is displayed, the probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting the transient elasticity measurement of the region of interest. Therefore, the user can determine whether multiple quality controls of the transient elasticity measurement meet the quality control standards based on the image evaluation information and the probe pre-pressure evaluation information, and start the transient elasticity measurement when it meets the quality control standards, so as to obtain accurate measurement values. Therefore, the evaluation of multiple quality controls of transient elasticity measurement is realized, and the quality of quality control can be displayed intuitively, which makes it easier for novices or inexperienced people to control the quality of multiple quality controls of transient elasticity measurement, making the operation of transient elasticity measurement easier to use and also conducive to the promotion of transient elasticity measurement.

[0149] The operations performed in this embodiment are similar to those described above. Figure 2 The operations performed in the illustrated embodiment and its multiple preferred implementations are similar and will not be described in detail here. It should be noted that the ultrasound image in this embodiment may be a one-dimensional, two-dimensional or three-dimensional ultrasound image, such as an M-type ultrasound image, an A-type ultrasound image, a B-type ultrasound image, etc., which are not limited here. The image evaluation information in this embodiment may be in the form of a high or low score, different text descriptions, or a graphic logo of different shapes, sizes, colors or filling states.

[0150] Based on the above embodiment, in a preferred implementation manner, determining the image evaluation information corresponding to the ultrasound image based on the ultrasound image may include: obtaining the ultrasound image quality control index, and determining the quality control result corresponding to the ultrasound image quality control index based on the ultrasound image, and determining the image evaluation information corresponding to the ultrasound image according to the quality control result. Figure 2 The operations performed in the illustrated embodiment and its preferred implementations are similar and will not be described in detail here.

[0151] Based on the above embodiments, in a preferred implementation manner, the region of interest in the reference ultrasound image for performing transient elasticity measurement can be determined according to the user's setting operation on the region of interest. Specifically, the ultrasound imaging device receives the user's setting operation on the reference ultrasound image, and displays the region of interest set by the user in real time in the reference ultrasound image according to the region of interest setting operation; determines the region of interest evaluation information of the region of interest set by the user, and displays the region of interest evaluation information; the region of interest evaluation information is used to indicate whether the region of interest set by the user is suitable as the region of interest for transient elasticity measurement, and then the region of interest set by the user whose region of interest evaluation information meets preset conditions can be determined as the region of interest for performing transient elasticity measurement. The operations performed in this embodiment are the same as those in the aforementioned Figure 2 The operations performed in the illustrated embodiment and its multiple preferred implementations are similar and will not be repeated here. It should be noted that the evaluation information of the region of interest in this embodiment may be in the form of a high or low score, different text descriptions, or graphic logos of different shapes, sizes, colors or filling states. Accordingly, the preset conditions in this embodiment may be that the score meets a preset threshold, the text description represents a region of interest suitable for transient elasticity measurement, or the shape, size, color or filling state of the graphic logo represents a region of interest suitable for transient elasticity measurement.

[0152] In another preferred implementation of this embodiment, the user may be prompted and guided to set the region of interest. Specifically, the ultrasound imaging device may determine the reference region of interest in the reference ultrasound image according to one or more of the scanning position of the reference ultrasound image, the position of the solid tissue region of the target part in the reference ultrasound image, and the position of the non-solid tissue region of the target part in the reference ultrasound image, and then display the reference region of interest in the reference ultrasound image to guide the user to set the region of interest. The operations performed in this embodiment are the same as those in the aforementioned Figure 2 The operations performed in the illustrated embodiment and its preferred implementations are similar and will not be described in detail here.

[0153] In another preferred embodiment, after displaying the region of interest set by the user, the ultrasonic imaging device may further display region of interest adjustment guidance information according to the region of interest set by the user and the reference region of interest, and the region of interest adjustment guidance information is used to prompt the user to adjust the position and / or size of the region of interest set by the user. The operations performed in this embodiment are the same as those in the aforementioned Figure 2 The operations performed in the illustrated embodiment and its preferred implementations are similar and will not be described in detail here.

[0154] In another preferred embodiment, when the reference ultrasound image displays the region of interest set by the user and the reference region of interest, the region of interest set by the user and the reference region of interest may be displayed separately to facilitate the user to identify the two. Specifically, the region of interest set by the user may be displayed in a first display style in the reference ultrasound image, and the reference region of interest may be displayed in a second display style in the reference ultrasound image, and the second display style is different from the first display style. The operations performed in this embodiment are the same as those described above. Figure 2 The operations performed in the illustrated embodiment and its preferred implementations are similar and will not be described in detail here.

[0155] In this embodiment, there are multiple ways to determine the region of interest evaluation information of the region of interest set by the user. One way is to determine the region of interest evaluation information of the region of interest set by the user based on the matching degree between the region of interest set by the user and the reference region of interest. Another way may be to determine the region of interest evaluation information based on the proportion of the solid tissue area and / or the proportion of the non-solid tissue area of ​​the target part in the region of interest set by the user. The two ways can be used independently or in combination, and are not limited here. The determination of the region of interest evaluation information can refer to the aforementioned Figure 2 The calculation principle of the region of interest score described in the illustrated embodiment and its multiple preferred implementations is understood and will not be repeated here.

[0156] In this embodiment, there are multiple ways to determine the image evaluation information corresponding to the ultrasound image. One way is to determine the solid tissue area and / or non-solid tissue area of ​​the target part in the ultrasound image according to the image characteristics of the ultrasound image; determine the proportion of the solid tissue area and / or the proportion of the non-solid tissue area in the ultrasound image; and determine the image evaluation information corresponding to the ultrasound image according to the proportion of the solid tissue area and / or the proportion of the non-solid tissue area in the ultrasound image. Another way may be to obtain a historical ultrasound image, calculate the matching degree between the ultrasound image and the historical ultrasound image; and determine the image evaluation information corresponding to the ultrasound image according to the matching degree between the ultrasound image and the historical ultrasound image; the historical ultrasound image is a pre-scanned ultrasound image suitable for instantaneous elasticity measurement. The two ways can be used independently or in combination, and there is no limitation here. The determination of the image evaluation information can refer to the aforementioned Figure 2 The calculation principle of the facet score described in the illustrated embodiment and its multiple preferred implementations is understood and will not be repeated here.

[0157] In one embodiment, after obtaining the historical ultrasound image, if the ultrasound scanning operation of the user holding the ultrasound probe on the target part is received, the ultrasound imaging device can also obtain the scanning position of the historical ultrasound image and the scanning position of the current ultrasound probe, and display the scanning guidance information according to the scanning position of the historical ultrasound image and the scanning position of the current ultrasound probe. The scanning guidance information is used to guide the user to adjust the scanning position to obtain a reference ultrasound image suitable for instantaneous elasticity measurement. This embodiment can refer to the aforementioned Figure 2 The contents described in the illustrated embodiment and its multiple preferred implementation modes are understood and will not be repeated here.

[0158] In one embodiment, the ultrasonic imaging device may further display at least one of the historical ultrasonic images, the matching degree, and the image evaluation information determined based on the matching degree. Figure 2 The contents described in the illustrated embodiment and its multiple preferred implementation modes are understood and will not be repeated here.

[0159] In one embodiment, the determination of image evaluation information corresponding to an ultrasound image can be performed in real time when the ultrasound image is obtained, so that the user can quickly know whether the current scanning position is suitable for instantaneous elasticity measurement, and can also enhance the user's experience of using the ultrasound imaging device.

[0160] In another preferred implementation of this embodiment, after determining with reference to the ultrasound image, if the probe pre-pressure is greater than a preset probe pre-pressure threshold and the difference between the two exceeds a first acceptable fluctuation range of the probe pre-pressure, the ultrasound imaging device may also display a first guidance message, the first guidance message being used to guide the user to reduce the probe pre-pressure; if the probe pre-pressure is less than a preset probe pre-pressure threshold and the difference between the two exceeds a second acceptable fluctuation range of the probe pre-pressure, the second guidance message is displayed, the second guidance message being used to guide the user to increase the probe pre-pressure. The guidance message for the probe pre-pressure in this embodiment may refer to the aforementioned Figure 2 The contents described in the illustrated embodiment and its multiple preferred implementation modes are understood and will not be repeated here.

[0161] In another preferred implementation of this embodiment, after determining with reference to the ultrasound image, when the probe pre-pressure evaluation information meets the requirement of being suitable for starting the transient elasticity measurement of the region of interest, or when the probe pre-pressure is adjusted to a value within the acceptable fluctuation range of the probe pre-pressure with the preset probe pre-pressure threshold, the ultrasound imaging device may also display a prompt message indicating that the probe pre-pressure meets the requirement of being suitable for starting the transient elasticity measurement of the region of interest. The prompt message in this embodiment may refer to the aforementioned Figure 2 The contents described in the illustrated embodiment and its multiple preferred implementation modes are understood and will not be repeated here.

[0162] In another preferred implementation of the present embodiment, after the region of interest for performing transient elasticity measurement is determined and the probe pre-pressure evaluation information meets the requirements for initiating transient elasticity measurement of the region of interest, the ultrasonic imaging device can automatically initiate transient elasticity measurement of the region of interest of the reference ultrasonic image, i.e., control the ultrasonic probe to emit ultrasonic waves to the tissue corresponding to the region of interest of the reference ultrasonic image to perform transient elasticity measurement and obtain the measurement result of the transient elasticity measurement.

[0163] Another preferred embodiment may be that after the region of interest for transient elasticity measurement is determined and the probe pre-pressure evaluation information meets the requirements for starting the transient elasticity measurement of the region of interest, the ultrasonic imaging device may display a prompt message for starting the transient elasticity measurement of the region of interest, so that the user can manually start the transient elasticity measurement according to the prompt message.

[0164] In one embodiment, the probe pre-pressure evaluation information may be expressed in a variety of forms, which may be expressed in the form of a score value, or in the form of text, such as a text description of appropriate probe pre-pressure, a text description of too high or too low probe pre-pressure, or a graphic representation of the suitability of the probe pre-pressure, and so on. Therefore, when displaying the probe pre-pressure evaluation information, the ultrasonic imaging device may calculate the probe pre-pressure score according to the degree of proximity of the probe pre-pressure to a preset probe pre-pressure threshold, and display the probe pre-pressure score; and / or, when displaying the probe pre-pressure evaluation information, display the first area in the preset graphic in a third display style, and display other areas in the preset graphic except the first area in a display style different from the third display style; wherein the proportion and / or color of the first area in the preset graphic is determined according to the degree of proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and the proportion and / or color are used to indicate the suitability of the probe pre-pressure for performing instantaneous elasticity measurement. The various forms of expression of the probe pre-pressure evaluation information in this embodiment can be referred to in the aforementioned Figure 2 The contents described in the illustrated embodiment and its multiple preferred implementation modes are understood and will not be repeated here.

[0165] In this embodiment, by evaluating and providing operation prompts for the whole process quality control of the scanning position, ROI setting and probe preload control links in the acquisition preparation state of the transient elasticity measurement, the operator can obtain a better liver transient elasticity scanning image, and can easily and accurately reach the optimal or better startup state of the transient elasticity measurement, thereby obtaining more accurate measurement values. This can not only standardize the operation process and unify the quality control standards, but also provide real-time prompts for the correction direction of operations such as the scanning position, ROI setting and probe preload control, effectively reducing the difficulty for novices to get started and improving the accuracy and repeatability of the transient elasticity measurement.

[0166] Based on the above Figure 1The specific structural composition of the ultrasonic imaging device and the functions of each structure shown in the figure further describe in detail the components of the ultrasonic imaging device and the functions and operations performed by each component. An embodiment of the ultrasonic imaging device in the embodiment of the present application includes:

[0167] Ultrasound probe;

[0168] A transmitting circuit, used for stimulating the ultrasonic probe to transmit ultrasonic waves to a target part of the subject;

[0169] A receiving circuit, used for controlling the ultrasonic probe to receive the ultrasonic echo returned from the target part to obtain an ultrasonic echo signal;

[0170] A processor is used to process the ultrasound echo signal to obtain an ultrasound section image of the target part, and perform the above-mentioned Figure 2 The illustrated embodiment and its preferred implementations provide a quality control method for transient elasticity measurement performed by an ultrasonic imaging device.

[0171] The functions and operations performed by the components of the ultrasonic imaging device in this embodiment are similar to those described above. Figure 2 The operations performed by the ultrasonic imaging device in the illustrated embodiment and its multiple preferred implementations are similar and will not be described in detail here.

[0172] In this embodiment, the user can determine whether the multiple quality controls of the transient elasticity measurement meet the quality control standards based on the section score and the probe preload evaluation information, and start the transient elasticity measurement when the quality control standards are met, so that accurate measurement values ​​can be obtained. Therefore, a quantitative evaluation of the multiple quality controls of the transient elasticity measurement is achieved, and the quality of the quality control can be displayed intuitively, making it easier for novices or inexperienced people to control the quality of the multiple quality controls of the transient elasticity measurement, making the operation of the transient elasticity measurement easier to use, and also conducive to the promotion of the transient elasticity measurement.

[0173] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0174] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0175] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0176] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0177] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), disk or optical disk and other media that can store program code.

Claims

1. A quality control method for transient elasticity measurement, characterized in that: The method comprises: Transmitting ultrasonic waves to the target part of the subject, and receiving echoes of the ultrasonic waves to obtain ultrasonic echo signals; Obtaining an ultrasonic cross-sectional image according to the ultrasonic echo signal, and displaying the ultrasonic cross-sectional image; Acquiring a section quality control index, and determining a quality control result corresponding to the section quality control index based on the ultrasound section image; Calculating a section score corresponding to the ultrasound section image according to the quality control result, and displaying the section score, wherein the section score is used to indicate whether the ultrasound section image is suitable as a reference ultrasound section image for transient elasticity measurement; Using the ultrasound section image whose section score meets a preset threshold as the reference ultrasound section image; Determining a region of interest for performing transient elasticity measurement based on the reference ultrasound section image; Determining a probe pre-pressure applied by a user holding a handheld ultrasound probe to the target part; Probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to a preset probe pre-pressure threshold value, and the probe pre-pressure evaluation information is displayed. The probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting instantaneous elastic measurement of the region of interest.

2. The method according to claim 1, characterized in that: The step of determining a region of interest for performing transient elasticity measurement based on the reference ultrasonic section image comprises: receiving a region of interest setting operation of the user on the reference ultrasonic section image, and displaying the region of interest set by the user in real time in the reference ultrasonic section image according to the region of interest setting operation; Calculating a region of interest score of the region of interest set by the user and displaying the region of interest score; the region of interest score is used to indicate whether the region of interest set by the user is suitable as a region of interest for transient elasticity measurement; The region of interest set by the user whose region of interest score meets a preset threshold is determined as the region of interest for performing the transient elasticity measurement.

3. The method according to claim 2, characterized in that Before receiving the region of interest setting operation input by the user for the reference ultrasound section image, the method further includes: Determine a reference region of interest in the reference ultrasound section image according to one or more of a scanning position of the reference ultrasound section image, a position of a solid tissue region of the target site in the reference ultrasound section image, and a position of a non-solid tissue region of the target site in the reference ultrasound section image; The reference region of interest is displayed in the reference ultrasound section image to guide the user to perform the region of interest setting operation.

4. The method according to claim 3, characterized in that: After displaying the region of interest set by the user, the method further includes: The region of interest adjustment guide information is displayed according to the region of interest set by the user and the reference region of interest, wherein the region of interest adjustment guide information is used to prompt the user to adjust the position and / or size of the region of interest set by the user.

5. The method according to claim 3, characterized in that: The step of displaying the region of interest set by the user in the reference ultrasound section image comprises: Displaying the region of interest set by the user in the reference ultrasound section image in a first display style; The displaying the reference region of interest in the reference ultrasound section image comprises: The reference region of interest is displayed in the reference ultrasound section image in a second display style, where the second display style is different from the first display style.

6. The method according to claim 3, characterized in that The calculating the region of interest score of the region of interest set by the user comprises: Calculating a region of interest score for the region of interest set by the user according to a degree of matching between the region of interest set by the user and the reference region of interest; and / or, The region of interest score is determined according to the proportion of the solid tissue area and / or the proportion of the non-solid tissue area of ​​the target part in the region of interest set by the user.

7. The method according to any one of claims 1 to 6, characterized in that: The determining, based on the ultrasound section image, a quality control result corresponding to the section quality control index comprises: Determine the solid tissue area and / or non-solid tissue area of ​​the target part in the ultrasonic section image according to the image features of the ultrasonic section image; Determining the proportion of the solid tissue area and / or the proportion of the non-solid tissue area in the ultrasonic section image; Calculating the section score corresponding to the ultrasound section image according to the quality control result includes: A section score corresponding to the ultrasound section image is calculated according to the proportion of the solid tissue area and / or the proportion of the non-solid tissue area in the ultrasound section image.

8. The method according to any one of claims 1 to 6, characterized in that: The determining, based on the ultrasound section image, a quality control result corresponding to the section quality control index comprises: Acquiring a historical ultrasonic section image, wherein the historical ultrasonic section image is a pre-scanned ultrasonic section image suitable for instantaneous elasticity measurement; Calculating the matching degree between the ultrasonic section image and the historical ultrasonic section image; Calculating the section score corresponding to the ultrasound section image according to the quality control result includes: A section score corresponding to the ultrasound section image is calculated according to a matching degree between the ultrasound section image and the historical ultrasound section image.

9. The method according to claim 8, characterized in that The method further comprises: Acquiring the scanning position of the historical ultrasound section image and the scanning position of the current ultrasound probe; Scanning guidance information is displayed according to the scanning position of the historical ultrasound section image and the scanning position of the current ultrasound probe, and the scanning guidance information is used to guide the user to adjust the position of the scanning section to obtain a reference ultrasound section image suitable for the instantaneous elasticity measurement.

10. The method according to claim 8 or 9, characterized in that: The method further comprises: At least one of the historical ultrasound slice image, the matching degree, and a slice score calculated based on the matching degree is displayed.

11. The method according to any one of claims 7 to 10, characterized in that: The calculation of the section score corresponding to the ultrasound section image is performed in real time when the ultrasound section image is obtained.

12. The method according to claim 1, characterized in that After the reference ultrasound section image is determined, the method further includes: If the probe pre-pressure is greater than the preset probe pre-pressure threshold and the difference between the two exceeds a first acceptable fluctuation range of the probe pre-pressure, first guidance information is displayed, where the first guidance information is used to guide the user to reduce the probe pre-pressure; If the probe pre-pressure is less than the preset probe pre-pressure threshold and the difference between the two exceeds the second acceptable fluctuation range of the probe pre-pressure, second guidance information is displayed, and the second guidance information is used to guide the user to increase the probe pre-pressure.

13. The method according to claim 1, characterized in that After the reference ultrasound section image is determined, the method further includes: When the probe pre-pressure evaluation information meets the requirement for starting the instantaneous elasticity measurement of the region of interest, prompt information that the probe pre-pressure meets the requirement is displayed.

14. The method according to any one of claims 1 to 13, characterized in that: The method further comprises: After the region of interest for transient elasticity measurement is determined and the probe pre-pressure evaluation information meets the requirements for starting the transient elasticity measurement of the region of interest, the ultrasound probe is controlled to emit ultrasound to the tissue corresponding to the region of interest of the reference ultrasound section image to perform transient elasticity measurement.

15. The method according to any one of claims 1 to 13, characterized in that The method further comprises: After the region of interest for transient elasticity measurement is determined and the probe preload evaluation information meets the requirement for starting the transient elasticity measurement of the region of interest, prompt information for starting the transient elasticity measurement of the region of interest is displayed.

16. The method according to claim 1, characterized in that The displaying of the probe pre-pressure evaluation information includes: Calculating a probe pre-pressure score according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and displaying the probe pre-pressure score; and / or, Display a first area in a preset graphic in a third display style; display other areas in the preset graphic except the first area in a display style different from the third display style; wherein the proportion and / or color of the first area in the preset graphic is determined according to the proximity of the probe preload to the preset probe preload threshold, and the proportion and / or color is used to indicate the suitability of the probe preload for performing instantaneous elasticity measurement.

17. A quality control method for transient elasticity measurement, characterized in that: The method comprises: Transmitting ultrasonic waves to the target part of the subject, and receiving echoes of the ultrasonic waves to obtain ultrasonic echo signals; Obtaining an ultrasonic image according to the ultrasonic echo signal, and displaying the ultrasonic image; Determining image evaluation information corresponding to the ultrasound image based on the ultrasound image, and displaying the image evaluation information, wherein the image evaluation information is used to indicate whether the ultrasound image is suitable as a reference ultrasound image for transient elasticity measurement; taking the ultrasound image whose image evaluation information satisfies a preset condition as the reference ultrasound image; determining a region of interest for performing transient elasticity measurement based on the reference ultrasound image; Determining a probe pre-pressure applied by a user holding a handheld ultrasound probe to the target part; Probe pre-pressure evaluation information is obtained according to the proximity of the probe pre-pressure to a preset probe pre-pressure threshold value, and the probe pre-pressure evaluation information is displayed. The probe pre-pressure evaluation information is used to indicate whether the probe pre-pressure is suitable for starting instantaneous elastic measurement of the region of interest.

18. The method according to claim 17, characterized in that The determining, based on the ultrasound image, image evaluation information corresponding to the ultrasound image comprises: Acquiring an ultrasound image quality control indicator, and determining a quality control result corresponding to the ultrasound image quality control indicator based on the ultrasound image; Image evaluation information corresponding to the ultrasound image is determined according to the quality control result.

19. The method according to claim 17, characterized in that The step of determining a region of interest for performing transient elasticity measurement based on the reference ultrasound image comprises: receiving a region of interest setting operation of the user on the reference ultrasound image, and displaying the region of interest set by the user in real time in the reference ultrasound image according to the region of interest setting operation; Determine region of interest evaluation information of the region of interest set by the user, and display the region of interest evaluation information; the region of interest evaluation information is used to indicate whether the region of interest set by the user is suitable as a region of interest for transient elasticity measurement; The region of interest set by the user whose region of interest evaluation information meets a preset condition is determined as the region of interest for performing the transient elasticity measurement.

20. The method according to claim 19, characterized in that Before receiving a user input for setting a region of interest of the reference ultrasound image, the method further includes: Determine a reference region of interest in the reference ultrasound image according to one or more of a scanning position of the reference ultrasound image, a position of a parenchymal tissue region of the target site in the reference ultrasound image, and a position of a non-parenchymal tissue region of the target site in the reference ultrasound image; The reference region of interest is displayed in the reference ultrasound image to guide a user to perform the region of interest setting operation.

21. The method according to claim 20, characterized in that After displaying the region of interest set by the user, the method further includes: The region of interest adjustment guide information is displayed according to the region of interest set by the user and the reference region of interest, wherein the region of interest adjustment guide information is used to prompt the user to adjust the position and / or size of the region of interest set by the user.

22. The method according to claim 20, characterized in that The step of displaying the region of interest set by the user in the reference ultrasound image comprises: Displaying the region of interest set by the user in the reference ultrasound image in a first display style; The displaying the reference region of interest in the reference ultrasound section image comprises: The reference region of interest is displayed in the reference ultrasound image in a second display style, where the second display style is different from the first display style.

23. The method according to claim 20, characterized in that The determining of the region of interest evaluation information of the region of interest set by the user includes: Determining region of interest evaluation information of the region of interest set by the user according to a matching degree between the region of interest set by the user and the reference region of interest; and / or, The region of interest evaluation information is determined according to the proportion of the solid tissue area and / or the proportion of the non-solid tissue area of ​​the target part in the region of interest set by the user.

24. The method according to any one of claims 17 to 23, characterized in that The determining, based on the ultrasound image, a quality control result corresponding to the ultrasound image quality control indicator comprises: Determine the parenchymal tissue region and / or non-parenchymal tissue region of the target part in the ultrasound image according to the image features of the ultrasound image; Determining a proportion of the solid tissue area and / or a proportion of the non-solid tissue area in the ultrasound image; Determining the image evaluation information corresponding to the ultrasound image according to the quality control result includes: Image evaluation information corresponding to the ultrasound image is determined according to the proportion of the solid tissue area and / or the proportion of the non-solid tissue area in the ultrasound image.

25. The method according to any one of claims 17 to 23, characterized in that The determining, based on the ultrasound image, a quality control result corresponding to the ultrasound image quality control indicator comprises: Acquiring a historical ultrasound image, wherein the historical ultrasound image is a pre-scanned ultrasound image suitable for instantaneous elasticity measurement; Calculating a matching degree between the ultrasonic image and the historical ultrasonic image; Determining the image evaluation information corresponding to the ultrasound image according to the quality control result includes: Image evaluation information corresponding to the ultrasonic image is determined according to a matching degree between the ultrasonic image and the historical ultrasonic image.

26. The method according to claim 25, characterized in that The method further comprises: Acquiring the scanning position of the historical ultrasound image and the scanning position of the current ultrasound probe; Scanning guidance information is displayed according to the scanning position of the historical ultrasound image and the scanning position of the current ultrasound probe, and the scanning guidance information is used to guide the user to adjust the scanning position to obtain a reference ultrasound image suitable for the instantaneous elasticity measurement.

27. The method according to claim 25 or 26, characterized in that The method further comprises: At least one of the historical ultrasound image, the matching degree, and image evaluation information determined based on the matching degree is displayed.

28. The method according to claim 17, characterized in that After the reference ultrasound image is determined, the method further includes: If the probe pre-pressure is greater than the preset probe pre-pressure threshold and the difference between the two exceeds a first acceptable fluctuation range of the probe pre-pressure, first guidance information is displayed, where the first guidance information is used to guide the user to reduce the probe pre-pressure; If the probe pre-pressure is less than the preset probe pre-pressure threshold and the difference between the two exceeds the second acceptable fluctuation range of the probe pre-pressure, second guidance information is displayed, and the second guidance information is used to guide the user to increase the probe pre-pressure.

29. The method according to claim 17, characterized in that After the reference ultrasound image is determined, the method further includes: When the probe pre-pressure evaluation information meets the requirement for starting the instantaneous elasticity measurement of the region of interest, prompt information that the probe pre-pressure meets the requirement is displayed.

30. The method according to any one of claims 17 to 29, characterized in that The method further comprises: After the region of interest for transient elasticity measurement is determined and the probe pre-pressure evaluation information meets the requirements for starting the transient elasticity measurement of the region of interest, the ultrasound probe is controlled to emit ultrasound to the tissue corresponding to the region of interest of the reference ultrasound image to perform transient elasticity measurement.

31. The method according to any one of claims 17 to 29, characterized in that The method further comprises: After the region of interest for transient elasticity measurement is determined and the probe preload evaluation information meets the requirement for starting the transient elasticity measurement of the region of interest, prompt information for starting the transient elasticity measurement of the region of interest is displayed.

32. The method according to claim 17, characterized in that The displaying of the probe pre-pressure evaluation information includes: Calculating a probe pre-pressure score according to the proximity of the probe pre-pressure to the preset probe pre-pressure threshold, and displaying the probe pre-pressure score; and / or, Display a first area in a preset graphic in a third display style; display other areas in the preset graphic except the first area in a display style different from the third display style; wherein the proportion and / or color of the first area in the preset graphic is determined according to the proximity of the probe preload to the preset probe preload threshold, and the proportion and / or color is used to indicate the suitability of the probe preload for performing instantaneous elasticity measurement.

33. An ultrasonic imaging device, characterized in that: include: Ultrasound probe; A transmitting circuit, used for stimulating the ultrasonic probe to transmit ultrasonic waves to a target part of the subject; A receiving circuit, used for controlling the ultrasonic probe to receive the ultrasonic echo and obtain an ultrasonic echo signal; A processor is used to process the ultrasonic echo signal to obtain an ultrasonic image of the target site, and to perform the quality control method for transient elasticity measurement according to any one of claims 1 to 32 based on the ultrasonic image.

Images