CN108720869B - Ultrasonic elasticity measurement method and device - Google Patents

Ultrasonic elasticity measurement method and device Download PDF

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CN108720869B
CN108720869B CN201710278509.6A CN201710278509A CN108720869B CN 108720869 B CN108720869 B CN 108720869B CN 201710278509 A CN201710278509 A CN 201710278509A CN 108720869 B CN108720869 B CN 108720869B
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李双双
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Shenzhen Mindray Bio Medical Electronics Co Ltd
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Abstract

The embodiment of the invention discloses an ultrasonic elasticity measurement method, which comprises the following steps: determining a preset target elasticity measurement mode, acquiring measurement parameters corresponding to the target elasticity measurement mode, and setting the ultrasonic probe according to the measurement parameters; transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through an ultrasonic probe, and receiving returned echo signal data; determining a reference parameter corresponding to a target elasticity measurement mode, and judging whether echo signal data are matched with the reference parameter; if not, selecting one elasticity measurement mode from at least one preset elasticity measurement mode as a new target elasticity measurement mode; and if so, generating and outputting elasticity measurement data corresponding to the tissue to be measured according to the echo signal data. In addition, the embodiment of the invention also discloses an ultrasonic elasticity measuring device. By adopting the invention, the success rate of elasticity measurement in the process of ultrasonic elastography can be improved.

Description

Ultrasonic elasticity measurement method and device
Technical Field
The invention relates to the technical field of computers, in particular to an ultrasonic elasticity measurement method and device.
Background
Ultrasonic elastography is a novel ultrasonic diagnostic technique, and the elasticity or hardness degree of tissues, namely information about tissue characteristics of pathological changes, can be reflected through ultrasonic elastography, so that the ultrasonic elastography can be used as a detection means for auxiliary detection, benign and malignant judgment and recovery evaluation of tissue cancer pathological changes, is one of hot points concerned by clinical research in recent years, and is increasingly applied.
Common ultrasonic elasticity measurement methods mainly include a conventional ultrasonic elasticity imaging method and a shear wave elasticity measurement method.
First, the basic principle of the conventional elastic ultrasonic imaging method, i.e. the strain elasticity measurement method, is as follows: the probe slightly presses a target tissue or forms a certain pressure on the tissue by virtue of the processes of respiration, blood vessel pulsation and the like of a human body, two frames of ultrasonic echo signals before and after compression are obtained, strain along the compression direction is generated in the tissue when the tissue is compressed, if the Young modulus distribution in the tissue is not uniform, the strain distribution in the tissue is different, then strain information of the tissue is detected by some methods, is output to an interface and is visually displayed in an elastic image form, and thus the elastic difference between different tissues in a pressure applying area is indirectly reflected.
Second, the shear wave elasticity measurement method reflects the difference in hardness between tissues mainly by generating propagation of a shear wave inside the tissues and detecting a propagation parameter (such as propagation velocity) thereof. For isotropic elastic tissue, the propagation velocity C of the shear wavesThe following relationship exists with the tissue elastic modulus E: young's modulus
Figure BDA0001278931540000011
(where ρ is the tissue density). That is, there is a one-to-one correspondence between shear wave velocity and elastic modulus. According to the difference of the shear wave generation technology, the shear wave elasticity measurement method can be divided into two methods, one is a shear wave measurement method based on acoustic radiation force, shear wave propagation is generated in the tissue through ultrasonic acoustic radiation force, and then the elasticity related parameter value in the region of interest is measured and displayed. The method can generate shear waves near target tissues, not only can realize local fixed-point measurement, but also can obtain distribution images of elastic values in a large area; the other method is a vibration elasticity measurement method based on external force vibration, shear waves generated by the external force vibration are transmitted into tissues, and elasticity related parameter values in the region of interest are measured and displayed.
For the ultrasonic elasticity measurement method, the strain elasticity measurement method depends on the pressure applied to the tissue by the probe, namely, the pressure application method has high requirements, and the method is not suitable for the tissue with uniform hardness; the shear wave measuring method based on the acoustic radiation force can generate shear waves near target tissues, not only can realize local fixed-point measurement, but also can obtain distribution images of elastic values in a large area, but the generated shear waves are very weak (usually in several um magnitudes), are attenuated quickly, and are easily interfered by factors such as respiration and blood vessel pulsation in the detection process; the method for measuring the vibration elasticity based on the external force vibration needs to be transmitted into target tissues from the body surface, and if interference of thick fat, large blood vessels, bones, pathologically generated liquid (such as liver ascites) and the like exist on a transmission path, shear waves can hardly reach the target tissues, so that the measurement fails.
That is, different ultrasound elasticity measurement methods are required for different measurement tissues, causes or different measurement personnel (e.g., doctors), so that when performing measurement, the measurement personnel needs to select one measurement mode according to the factors such as the current disease condition, and set the ultrasound probe according to the selected measurement mode. Moreover, if the currently selected measurement mode cannot be prepared to obtain an optimal measurement result or measurement fails, a measurement person needs to reselect another measurement mode or another measurement instrument for measurement according to analysis of the measurement result after the measurement is finished. This results in that when using ultrasound elastography, because the optimal measurement method cannot be selected according to the current user's specific situation, the measured tissue region and the doctor's usage habit, it may need to perform multiple measurements to obtain the final measurement result. That is, the conventional ultrasonic elasticity measurement method has the problem of insufficient success rate of elasticity measurement.
Disclosure of Invention
Therefore, in order to solve the technical problem of insufficient success rate of the elasticity measuring method in the ultrasonic elasticity imaging process in the traditional technology, the ultrasonic elasticity measuring method is particularly provided.
An ultrasonic elasticity measurement method comprising:
determining a preset target elasticity measurement mode, acquiring measurement parameters corresponding to the target elasticity measurement mode, and setting an ultrasonic probe according to the measurement parameters;
transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through the ultrasonic probe, and receiving returned echo signal data;
determining a reference parameter corresponding to the target elasticity measurement mode, and judging whether the echo signal data is matched with the reference parameter;
under the condition that the echo signal data are not matched with the reference parameters, determining a selected elastic measurement mode as a target elastic measurement mode in at least one preset elastic measurement mode, and executing the acquisition of measurement parameters corresponding to the target elastic measurement mode;
and under the condition that the echo signal data are matched with the reference parameters, generating and outputting elasticity measurement data corresponding to the tissue to be measured according to the echo signal data.
Optionally, in one embodiment, the elasticity measurement mode includes at least one of a vibration elasticity measurement mode based on external force vibration, a shear wave measurement mode based on acoustic radiation force, and/or a strain elasticity measurement mode.
Optionally, in one embodiment, the determining whether the echo signal data matches the reference parameter includes: under the condition that the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, determining the position information of at least two time points on the propagation path of the ultrasonic wave in the tissue to be measured according to the echo signal data, performing linear fitting on the position information of the at least two time points by taking the time points as independent variables and the position information as dependent variables, and calculating the square sum of residual errors corresponding to the linear fitting to be used as a fitting quality parameter; judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is the reference parameter corresponding to the vibration elasticity measurement mode based on the external force vibration; determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
Optionally, in one embodiment, the determining whether the echo signal data matches with the reference parameter includes: under the condition that the target elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force, acquiring waveform characteristic data of the echo signal data; judging whether the waveform characteristic data is matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force; under the condition that the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameter; and under the condition that the waveform characteristic data are not matched with the preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
Optionally, in one embodiment, the determining the preset target elasticity measurement mode includes: receiving at least one character string as a keyword; and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
Optionally, in one embodiment, after the determining whether the echo signal data matches the reference parameter, the method further includes: under the condition that the echo signal data are not matched with the reference parameters, generating prompt information of measurement failure, and displaying an elastic measurement mode switching component; receiving an input switching operation through the elastic measurement mode switching assembly, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and executing the acquisition of the measurement parameters corresponding to the target elastic measurement mode.
Optionally, in one embodiment, the obtaining of the measurement parameter corresponding to the target elasticity measurement mode and setting the ultrasonic probe according to the measurement parameter includes: acquiring a wavelength or a frequency corresponding to the target elasticity measurement mode; and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency so as to enable the ultrasonic waves emitted by the ultrasonic probe to correspond to the acquired wavelength or frequency.
In addition, in order to solve the technical problem that the success rate of the elasticity measuring method in the ultrasonic elasticity imaging process in the traditional technology is insufficient, an ultrasonic elasticity measuring device is also provided.
An ultrasonic elasticity measurement device comprising:
the target elasticity measurement mode determining module is used for determining a preset target elasticity measurement mode;
the parameter setting module is used for acquiring the measurement parameters corresponding to the target elasticity measurement mode and setting the ultrasonic probe according to the measurement parameters;
the echo signal data receiving module is used for transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through the ultrasonic probe and receiving returned echo signal data;
the data checking module is used for determining a reference parameter corresponding to the target elasticity measurement mode and judging whether the echo signal data is matched with the reference parameter;
the elastic measurement mode switching module is used for determining a selected elastic measurement mode as a target elastic measurement mode in at least one preset elastic measurement mode under the condition that the echo signal data is not matched with the reference parameter, and calling the parameter setting module;
and the data output module is used for generating and outputting elastic measurement data corresponding to the tissue to be measured according to the echo signal data under the condition that the echo signal data is matched with the reference parameter.
Optionally, in one embodiment, the elasticity measurement manner includes at least one of a vibration elasticity measurement manner based on vibration of an external force, a shear wave measurement manner based on an acoustic radiation force, and/or a strain elasticity measurement manner.
Optionally, in one embodiment, the data verification module is further configured to determine, according to the echo signal data, position information of at least two time points on a propagation path of the ultrasonic wave in the tissue to be measured when the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, perform linear fitting on the position information of the at least two time points with the time points as independent variables and the position information as dependent variables, and calculate a sum of squares of residuals corresponding to the linear fitting as a fitting quality parameter; judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is the reference parameter corresponding to the vibration elasticity measurement mode based on the external force vibration; determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
Optionally, in one embodiment, the data verification module is further configured to acquire waveform characteristic data of the echo signal data when the target elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force; judging whether the waveform characteristic data is matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force or not; under the condition that the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameter; and under the condition that the waveform characteristic data are not matched with the preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
Optionally, in one embodiment, the target elasticity measurement mode determining module is further configured to receive at least one input character string as a keyword; and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
Optionally, in one embodiment, the target elastic measurement mode determining module is further configured to generate a prompt message of measurement failure and display an elastic measurement mode switching component when the echo signal data is not matched with the reference parameter; and receiving input switching operation through the elastic measurement mode switching component, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and calling the parameter setting module.
Optionally, in one embodiment, the parameter setting module is further configured to obtain a wavelength or a frequency corresponding to the target elasticity measurement mode; and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency so as to enable the ultrasonic waves emitted by the ultrasonic probe to correspond to the acquired wavelength or frequency.
The embodiment of the invention has the following beneficial effects:
after the ultrasonic elasticity measurement method and the device are adopted, when ultrasonic measurement is carried out, firstly, the measurement is carried out through an elasticity measurement mode preset by a system, whether the measurement result meets the preset condition or not is judged, namely, whether the quality of the measurement result meets the requirement or not is judged, and under the condition that the measurement result does not meet the requirement, the measurement is automatically switched to another preferable elasticity measurement mode for measurement. That is to say, the system selects one elasticity measurement mode according to the disease condition or the measurement purpose, and then intelligently switches to another elasticity measurement mode to measure under the condition of measurement failure, thereby improving the success rate of elasticity measurement.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
FIG. 1 is a schematic flow chart diagram of a method of ultrasonic elasticity measurement in one embodiment;
FIG. 2 is a schematic illustration of the propagation of a shear wave in one embodiment;
FIG. 3 is a schematic view of a shear wave configuration in one embodiment;
FIG. 4 is a schematic view of a shear wave configuration in one embodiment;
FIG. 5 is a flow chart illustrating an ultrasonic elasticity measurement process according to an embodiment
FIG. 6 is a schematic diagram of an ultrasonic elasticity measurement device in one embodiment;
FIG. 7 is a schematic structural diagram of a computer device for operating the ultrasonic elasticity measurement method in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the technical problem of the lack of success rate of the elastometry method in the course of ultrasonic elastography in the conventional art, in the present embodiment, an ultrasonic elastometry method is proposed, which can be implemented in dependence on a computer program which can be run on a computer system based on von neumann architecture, which may be a control program of an ultrasonic elastography device. The computer system may be a terminal device including an ultrasonic probe that emits ultrasonic waves, which runs the above computer program, and the terminal device may be an ultrasonic elasticity measuring apparatus.
It should be noted that, in this embodiment, the ultrasound elasticity measurement apparatus based on which the above-mentioned ultrasound elasticity measurement method is implemented includes an ultrasound probe capable of emitting ultrasound waves, a display interface capable of displaying elasticity measurement results by a user (for example, an image showing final elasticity measurement data), and a processor for analyzing the measurement data (the processor is also used for emitting instructions to the ultrasound probe).
Specifically, as shown in fig. 1, the method for measuring ultrasonic elasticity includes the following steps S101 to S106:
step S101: and determining a preset target elasticity measurement mode.
In a specific implementation, a user may set a preferred elasticity measurement mode in the ultrasonic elasticity measurement device, for example, in a case where the ultrasonic elasticity measurement device is mainly used for detecting a certain type of lesion, an elasticity measurement mode most suitable for the lesion may be selected as a limited elasticity measurement mode, i.e., a target elasticity measurement mode, according to a specific feature of the lesion.
For example, in a specific embodiment, in the examination performed by the current ultrasonic elasticity measurement apparatus, most users' examinations directly use the vibration elasticity measurement method based on external force vibration as the preferred elasticity measurement method, i.e., the target elasticity measurement method, in the case that the purpose can be achieved by using the vibration elasticity measurement method based on external force vibration.
In this embodiment, the elasticity measurement method may be a vibration elasticity measurement method based on external force vibration, a shear wave measurement method based on acoustic radiation force, or a strain elasticity measurement method.
Specifically, the vibration elasticity measurement method based on external force vibration generates shear waves through external force vibration and transmits the shear waves into tissues, and then reflects hardness differences among the tissues through a method of generating shear wave propagation inside the tissues and detecting propagation parameters (such as propagation speed) of the shear waves. For isotropic elastic tissue, the propagation velocity C of the shear wavesThe following relationship exists with the tissue elastic modulus E: young's modulus
Figure BDA0001278931540000071
(where ρ is the tissue density). That is, there is a one-to-one correspondence between shear wave velocity and elastic modulus.
The shear wave measurement method based on the acoustic radiation force generates the propagation of the shear wave in the tissue through the ultrasonic acoustic radiation force, and then reflects the hardness difference between tissues through a method of generating the propagation of the shear wave in the tissue and detecting the propagation parameter (such as the propagation speed). For isotropic elastic tissue, the propagation velocity C of the shear wavesThe following relationship exists with the tissue elastic modulus E: young's modulus
Figure BDA0001278931540000081
(where ρ is the tissue density). That is, there is a one-to-one correspondence between shear wave velocity and elastic modulus.
The basic principle of the strain elasticity measurement mode, or the conventional ultrasonic elasticity measurement mode, is as follows: the method comprises the steps of slightly pressing a target tissue by a probe or forming a certain pressure on the tissue by means of the processes of respiration, blood vessel pulsation and the like of a human body, obtaining ultrasonic echo signals of two frames before and after compression, generating strain in the tissue along the compression direction when the tissue is compressed, if the Young modulus distribution in the tissue is not uniform, the strain distribution in the tissue is different, detecting strain information of the tissue by some methods, and calculating and forming parameters related to the elasticity of the tissue, such as strain quantity, strain rate and the like, so that the elasticity difference between different tissues in a pressure application area is indirectly reflected. Specifically, according to hooke's law, for an isotropic elastomer, the stress σ ═ strain ∈ × young's modulus E, i.e., E ═ σ/∈. Wherein, the Young modulus E is a parameter related to the hardness of the tissue, and the higher the Young modulus is, the higher the hardness of the tissue is.
In the present embodiment, the elasticity measurement method is not limited to the above-described elasticity measurement method, and may be another elasticity measurement method based on ultrasonic elastography.
In this embodiment, the preset target elasticity measurement mode may be not only a preset specified elasticity measurement mode, but also a mode set by the user when detection using the ultrasonic elasticity measurement device is required, for example, before starting measurement.
For example, in one specific embodiment, before the detection is performed by using the ultrasonic elasticity measurement device, alternative elasticity measurement modes are displayed on the display interface, one elasticity measurement mode is selected from the displayed multiple elasticity measurement modes by the user as a target elasticity measurement mode, and the measurement is performed.
In another specific embodiment, before the detection is performed by using the ultrasonic elasticity measuring device, the user does not directly select the target elasticity measuring mode for the detection, but the target elasticity measuring mode is determined by the ultrasonic elasticity measuring device according to the keyword input by the user by inputting the keyword corresponding to the currently performed detection.
Specifically, the determining the preset target elasticity measurement mode includes: receiving at least one character string as a keyword; and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
The character string input by the user may be a doctor identification, a tissue site to be measured, a cause of a disease, etc., and the character string input may be more than one. When the input character string is "liver, cancer", the "liver, cancer" is used as a keyword.
Different keywords correspond to different elasticity measurement modes, so that after the keywords are determined, the elasticity measurement mode corresponding to the keywords can be determined. For example, in the case where the keyword is "liver, cancer", the determined elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force.
In another embodiment, the keyword may be not only one or more character strings, but also case data of the user or historical case data, and the keyword is automatically determined or the target elasticity measurement mode is determined according to the case data or the historical case data.
It should be noted that, in this embodiment, the preset target elasticity measurement mode may also be determined in other manners, for example, an elasticity measurement mode with the highest use frequency may be determined according to historical data of the ultrasonic elasticity measurement device; or determining a target elasticity measurement mode according to the historical data and the currently received keywords.
Step S102: and acquiring a measurement parameter corresponding to the target elasticity measurement mode, and setting the ultrasonic probe according to the measurement parameter.
Different elasticity measurement modes correspond to different specific operations, and the corresponding ultrasonic wave emission modes are different, namely, the different elasticity measurement modes correspond to different emission parameters of the ultrasonic probe. In this embodiment, after the target elasticity measurement mode for detection is determined, a preset measurement parameter (for example, a transmission parameter of the ultrasonic probe) corresponding to the target elasticity measurement mode may be obtained, and the transmission parameter of the ultrasonic probe is set according to the measurement parameter, so that the relevant parameter of the ultrasonic wave transmitted by the ultrasonic probe is matched with the target elasticity measurement mode.
In a specific embodiment, the obtaining of the measurement parameter corresponding to the target elasticity measurement mode and the setting of the ultrasonic probe according to the measurement parameter includes: acquiring a wavelength or a frequency corresponding to the target elasticity measurement mode; and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency so as to control the pulse sequence emitted by the ultrasonic probe to correspond to the acquired wavelength or frequency.
That is, different elasticity measurement modes correspond to ultrasonic waves of different frequencies or wavelengths and correspond to different emission modes, so that after a target elasticity measurement mode is determined, the frequency or wavelength corresponding to the target elasticity measurement mode can be acquired, emission parameters such as the emission mode corresponding to the target elasticity measurement mode can be acquired, and then the emission parameters of the ultrasonic probe are set, so that the ultrasonic wave transmitted by the ultrasonic probe corresponds to the acquired wavelength or frequency and the acquired emission mode.
Step S103: and transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through the ultrasonic probe, and receiving returned echo signal data.
After the emission parameters of the ultrasonic probe are set, the ultrasonic elasticity measuring device can be used for detecting the tissue to be detected. Specifically, the ultrasonic probe is controlled by a pulse sequence to generate ultrasonic waves to the tissue to be measured, and the pulse sequence is matched with the measurement parameters corresponding to the target elasticity measurement mode.
In the present embodiment, the ultrasonic waves transmitted from the ultrasonic probe to the tissue to be measured are shear waves, that is, the propagation direction of the ultrasonic waves is perpendicular to the vibration direction of the mass points of the tissue to be measured.
After the shear wave is transmitted to the tissue to be measured by the ultrasonic probe, the shear wave can propagate in the tissue to be measured. In this embodiment, the ultrasonic probe may not only transmit signals, but also receive signals, that is, receive signal data reflected back by the tissue to be measured, that is, the ultrasonic probe receives echo signal data reflected back by the tissue to be measured.
In this embodiment, the signal emitted by the ultrasonic probe is a standard signal, and the echo signal data received by the ultrasonic probe is signal data reflected by a certain portion of the tissue to be measured. Because the elasticity, hardness, or the like of each part of the tissue to be measured is different, the reflected echo signal data also shows a difference due to the inconsistency of the parameters, such as the elasticity, hardness, or the like of each part of the tissue to be measured, so as to reflect the related data of the tissue to be measured.
Step S104: determining a reference parameter corresponding to the target elasticity measurement mode, and judging whether the echo signal data is matched with the reference parameter; if not, go to step S105: determining the selected elasticity measurement mode as a target elasticity measurement mode in at least one preset elasticity measurement mode, and executing the step S102: acquiring a measurement parameter corresponding to the target elasticity measurement mode, and setting an ultrasonic probe according to the measurement parameter; if yes, go to step S106: and generating and outputting elasticity measurement data corresponding to the tissue to be measured according to the echo signal data.
In this embodiment, the echo signal data received by the ultrasonic probe is the data detected by the ultrasonic elasticity measuring device. In this embodiment, the echo signal data is not used as the final output result of the ultrasound elasticity measurement, and it is also necessary to generate corresponding elasticity measurement data from the echo signal data and output the finally obtained elasticity measurement data as detection data, for example, output the elasticity measurement data in the form of an elasticity image.
In this embodiment, the echo signal data or the elasticity measurement data generated according to the echo signal data is not output as the final output result of the ultrasonic elasticity measurement under all conditions and the whole process of the ultrasonic elasticity measurement is ended, and the detected data needs to be verified, that is, whether the current ultrasonic elasticity measurement is successful or not is judged, and if the measurement fails, the measurement needs to be performed again.
That is, regarding the echo signal data obtained by the target elasticity measurement method in step S103, it is necessary to determine whether the echo signal data meets the quality requirement corresponding to the target elasticity measurement method, and only when the echo signal data meets the quality requirement, the echo signal data is considered to be valid data and is used as a measurement result, otherwise, when the echo signal data does not meet the quality requirement, the echo signal data is considered to be invalid data and needs to be measured again.
In this embodiment, the determination process of whether the echo signal data corresponding to different elasticity measurement modes is corresponding to the reference parameter (which may be a signal quality parameter or another reference parameter) corresponding to the elasticity measurement mode is also different. Reference parameter as referred to herein is a parameter value used to measure whether the echo data meets the requirement of an elasticity measurement, for example, a signal quality parameter used to measure the echo signal, an elasticity quality parameter used to measure the quality of a shear wave velocity measurement in the echo signal, an elasticity quality parameter used to measure the quality of a tissue strain measurement in the echo signal, and so on. Different elasticity measurement modes correspond to different reference parameters. The following embodiment provides a way to determine the elastic mass parameter as the reference parameter. In a particular embodiment, the reference parameter may be understood as: the elastic quality parameters obtained according to the position changes of at least two time points on the shear wave propagation path or tissue strain in the tissue to be measured can be a certain threshold value or a certain number range when used for judging and comparing.
Specifically, in a specific embodiment, in a case that the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, the determining whether the echo signal data matches the reference parameter includes: determining the position information of at least two time points on the propagation path of the ultrasonic wave in the tissue to be tested according to the echo signal data, performing linear fitting on the position information of the at least two time points by taking the time points as independent variables and the position information as dependent variables, and calculating the square sum of residual errors corresponding to the linear fitting to be used as a fitting quality parameter; judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is the reference parameter corresponding to the vibration elasticity measurement mode based on the external force vibration; determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
In this embodiment, in a vibration elasticity measurement mode based on external force vibration, after a shear wave is transmitted into a tissue to be measured, position information to which the shear wave propagates at each time in a path of the shear wave transmitted into the tissue to be measured can be determined according to a signal returned by the tissue to be measured.
In this embodiment, the position information of multiple time points on the propagation path of the shear wave in the tissue to be measured may be determined according to the echo signal data, and it should be noted that, in this embodiment, the number of the determined position information of the time points is at least 2, and when the number of the time points is large, the accuracy of the determination of the obtained signal quality parameter is more accurate.
And taking the time points as independent variables and the position information as dependent variables, performing linear fitting on the position information of each two time points, determining an expression of the linear fitting, and then calculating a fitting quality parameter of the linear fitting. In a specific embodiment, the fitting quality parameter of the linear fitting may be determined by calculating a fitting error of the linear fitting, for example, calculating a sum of squares of differences between the fitting value of each time point and the corresponding position information of the time point as the fitting quality parameter of the linear fitting.
E.g. t1,t2,…,tnFor a time point, the corresponding position information is S1,S2,…,SnThe expression obtained by linear fitting is S' ═ At + B, and the fitting quality parameter is
Figure BDA0001278931540000121
Then, under the condition that the fitting quality parameter is smaller than a preset fitting quality parameter threshold value, determining that the echo signal data is matched with the reference parameter; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
For example, as shown in fig. 2, a schematic diagram of the shear wave in the propagation process is shown in fig. 2, from which the position information of the feature points (the points shown in fig. 2) at different time points can be determined, and then the propagation velocity or the average propagation velocity of the shear wave is calculated. Generally, the propagation velocity is uniform, and if the propagation velocity fluctuates greatly, the measurement result may be affected by other factors, so that the fitting error of the linear fitting obtained according to the time point and the position information is large, and the echo signal data is judged not to match the reference parameter.
In another specific embodiment, in the case that the target elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force, the determining whether the echo signal data matches the reference parameter includes: acquiring waveform characteristic data of the echo signal data; judging whether the waveform characteristic data is matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force; under the condition that the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameter; and under the condition that the waveform characteristic data are not matched with the preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
Because the shear wave measurement mode based on the acoustic radiation force is easily interfered by noise, whether the corresponding measurement data meets the requirements can be judged from the noise of the echo signal data.
Specifically, in an embodiment, waveform feature data corresponding to signal data in echo signal data is obtained, and then it is determined whether the waveform feature data matches a preset reference parameter corresponding to the shear wave measurement mode based on acoustic radiation force, for example, when the waveform feature data has a standard form and no abrupt jump, it is determined that the waveform feature matches the reference parameter, otherwise, when the waveform feature data has many curve burrs, abrupt jump, too low shear wave amplitude, and too high signal-to-noise ratio, it is determined that the waveform feature is unmatched with the reference parameter.
For example, in the shear wave form diagram shown in FIG. 3, the shear wave form shown in FIG. 3 is standard, without abrupt transitions, and is therefore considered to match the reference parameters. In another embodiment, for shear waves such as that shown in FIG. 4, there are many sharp transitions in the curve and therefore are considered mismatched with the reference parameter.
In another optional embodiment, a signal-to-noise ratio corresponding to the echo signal data may be further calculated, and whether the echo signal data matches the reference parameter is determined by determining whether the signal-to-noise ratio exceeds a preset value, that is, in a case where the signal-to-noise ratio is lower than the preset value, it is determined that the echo signal data matches the reference parameter; and under the condition that the signal-to-noise ratio is not lower than a preset value, determining that the echo signal data is not matched with the reference parameter.
It should be noted that, in this embodiment, when the echo signal data does not match the reference parameter, the elastic measurement of the tissue to be measured is switched to another target elastic measurement mode to detect the tissue to be measured.
For example, in the case that the selectable elasticity measurement modes include elasticity measurement mode a and elasticity measurement mode B, if the target elasticity measurement mode is a, in step S105, the target elasticity measurement mode is switched to B and steps S102 to S106 are executed again.
In another embodiment, there are more than two alternative elasticity measurement modes, that is, there is more than one elasticity measurement mode other than the target elasticity measurement mode, in which case, it is necessary to determine one elasticity measurement mode from among the more than one elasticity measurement modes as the new elasticity measurement mode.
Specifically, in an embodiment, the process of determining a new elasticity measurement mode may be determined according to an elasticity measurement mode selected by a user, that is, after the determining whether the echo signal data matches the reference parameter, the method further includes: under the condition that the echo signal data are not matched with the reference parameters, generating prompt information of measurement failure, and displaying an elastic measurement mode switching component; receiving an input switching operation through the elastic measurement mode switching component, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and executing the acquisition of the measurement parameters corresponding to the target elastic measurement mode.
In this embodiment, if the echo signal data does not match the reference parameter, it indicates that the measurement has failed, in this case, the user needs to be prompted to perform the measurement again, for example, the user may be prompted by one or a combination of multiple prompting methods such as sound, prompt information displayed on a screen, and light. In addition, it is also necessary to change one elasticity measurement mode for measurement, and in this embodiment, there are various modes for determining a new target elasticity measurement mode when the elasticity measurement mode is switched.
One way is to present the elasticity measurement mode switching component for the user to input on the component and determine the target elasticity measurement mode to switch to in case of measurement failure. For example, options of selectable elasticity measurement modes are displayed in the displayed elasticity measurement mode switching assembly, and a user can select one option from the displayed options and take the elasticity measurement mode corresponding to the option as a new target elasticity measurement mode.
In another embodiment, when determining a new target elasticity measurement mode, the tissue to be measured may be judged according to the echo signal data to determine a next target elasticity measurement mode. For example, in the elasticity measurement method based on the amplitude, if the signal-to-noise ratio of the received echo signal data is too high, the noise interference is considered to be serious, and in this case, the vibration elasticity measurement method based on the external force vibration with strong noise interference resistance may be used as a new target elasticity measurement method for measurement.
In a specific embodiment, a schematic diagram between the various processes of the ultrasonic elasticity measurement mode described above is given, as shown in FIG. 5. Before measurement, firstly, an elasticity measurement mode is determined, then an ultrasonic probe is controlled through a transmitting sequence to measure a tissue to be measured and obtain returned signal data, then an elasticity result corresponding to the signal data is calculated, whether the measurement fails or not is judged, the elasticity result is directly displayed under the condition that the measurement succeeds, otherwise, a new elasticity measurement mode is switched and the measurement is carried out again under the condition that the measurement fails.
It should be noted that, generally, the choice of the selectable elastic measurement modes is limited, and in the case of a measurement failure, the measurement mode may be switched to another elastic measurement mode for measurement, but in the case of a measurement failure, the measurement mode may be switched again, and there may be a case where all the selectable measurement modes are measured, but all the measurement modes fail to measure. In this embodiment, when all the selectable elasticity measurement modes fail to perform measurement, prompt information corresponding to the measurement failure of all the selectable elasticity measurement modes may be generated to prompt the user that the measurement results of the plurality of measurement modes are impersonated, and in this case, diagnosis may be performed depending on another imaging mode (for example, a two-dimensional B-mode image), so that erroneous diagnosis is avoided, and the error rate is reduced.
In addition, in order to solve the technical problem of insufficient success rate of the elasticity measurement method in the process of ultrasonic elastography in the conventional technology, in an embodiment, as shown in fig. 6, an ultrasonic elasticity measurement apparatus is further provided, which includes a target elasticity measurement mode determining module 101, a parameter setting module 102, an echo signal data receiving module 103, a data verifying module 104, an elasticity measurement mode switching module 105, and a data outputting module 106, wherein:
a target elasticity measurement mode determining module 101, configured to determine a preset target elasticity measurement mode;
a parameter setting module 102, configured to obtain a measurement parameter corresponding to the target elasticity measurement mode, and set the ultrasonic probe according to the measurement parameter;
the echo signal data receiving module 103 is configured to transmit ultrasonic waves matched with the measurement parameters to a tissue to be measured through the ultrasonic probe, and receive returned echo signal data;
a data checking module 104, configured to determine a reference parameter corresponding to the target elasticity measurement mode, and determine whether the echo signal data matches the reference parameter;
an elastic measurement mode switching module 105, configured to determine, when the echo signal data is not matched with the reference parameter, a selected elastic measurement mode as a target elastic measurement mode from among at least one preset elastic measurement mode, and call the parameter setting module 102;
and a data output module 106, configured to generate and output elasticity measurement data corresponding to the tissue to be measured according to the echo signal data when the echo signal data is matched with the reference parameter.
Optionally, in an embodiment, the elasticity measurement mode includes at least one of a vibration elasticity measurement mode based on external force vibration, a shear wave measurement mode based on acoustic radiation force, and/or a strain elasticity measurement mode.
Optionally, in an embodiment, the data verification module 104 is further configured to determine, according to the echo signal data, position information of at least two time points on a propagation path of the ultrasonic wave in the tissue to be measured when the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, perform linear fitting on the position information of the at least two time points with the time points as independent variables and the position information as dependent variables, and calculate a sum of squares of residuals corresponding to the linear fitting as a fitting quality parameter; judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is the reference parameter corresponding to the vibration elasticity measurement mode based on the external force vibration; determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
Optionally, in an embodiment, the data verification module 104 is further configured to acquire waveform characteristic data of the echo signal data when the target elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force; judging whether the waveform characteristic data is matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force or not; under the condition that the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameter; and under the condition that the waveform characteristic data are not matched with the preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
Optionally, in an embodiment, the target elasticity measurement mode determining module 101 is further configured to receive at least one input character string as a keyword; and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
Optionally, in an embodiment, the target elastic measurement mode determining module 101 is further configured to generate a prompt message of measurement failure and display an elastic measurement mode switching component when the echo signal data is not matched with the reference parameter; receiving an input switching operation through the elastic measurement mode switching component, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and calling the parameter setting module 102.
Optionally, in an embodiment, the parameter setting module 102 is further configured to obtain a wavelength or a frequency corresponding to the target elasticity measurement mode; and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency, so that the ultrasonic wave emitted by the ultrasonic probe corresponds to the acquired wavelength or frequency.
The embodiment of the invention has the following beneficial effects:
after the ultrasonic elasticity measurement method and the device are adopted, when ultrasonic measurement is carried out, firstly, the measurement is carried out through an elasticity measurement mode preset by a system, whether the measurement result meets the preset condition is judged, namely whether the quality of the measurement result meets the requirement is judged, and under the condition that the measurement result does not meet the requirement, the measurement is automatically switched to another optimized elasticity measurement mode for measurement. That is to say, the system selects one elasticity measurement mode according to the disease condition or the measurement purpose, and then intelligently switches to another elasticity measurement mode to measure under the condition of measurement failure, thereby improving the success rate of elasticity measurement.
In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
In one embodiment, as shown in fig. 7, fig. 7 illustrates a terminal of a computer system based on von neumann architecture running the above-described ultrasonic elasticity measurement method. The computer system can be terminal equipment such as a smart phone, a tablet computer, a palm computer, a notebook computer or a personal computer. Specifically, an external input interface 1001, a processor 1002, a memory 1003, an output interface 1004, and an ultrasound probe 1005, which are connected by a system bus, may be included. The external input interface 1001 may optionally include at least a network interface 10012. Memory 1003 can include external memory 10032 (e.g., a hard disk, optical or floppy disk, etc.) and internal memory 10034. The output interface 1004 may include at least a display 10042 or the like.
In this embodiment, the method is executed based on a computer program, a program file of the computer program is stored in the external memory 10032 of the computer system based on the von neumann system, and the program file is loaded into the internal memory 10034 at the time of execution, then compiled into machine code, and then transferred to the processor 1002 to be executed, so that the logical target elasticity measurement mode determining module 101, the parameter setting module 102, the echo signal data receiving module 103, the data verifying module 104, the elasticity measurement mode switching module 105, and the data output module 106 are formed in the computer system based on the von neumann system. In the process of executing the ultrasonic elasticity measurement method, the input parameters are received through the external input interface 1001, transferred to the memory 1003 for buffering, and then input into the processor 1002 for processing, and the processed result data is buffered in the memory 1003 for subsequent processing or transferred to the output interface 1004 for outputting.
Specifically, the processor 1002 is configured to perform the following operations:
determining a preset target elasticity measurement mode, acquiring measurement parameters corresponding to the target elasticity measurement mode, and setting an ultrasonic probe according to the measurement parameters;
transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through the ultrasonic probe 1005, and receiving returned echo signal data;
determining a reference parameter corresponding to the target elasticity measurement mode, and judging whether the echo signal data is matched with the reference parameter;
under the condition that the echo signal data are not matched with the reference parameters, determining a selected elastic measurement mode as a target elastic measurement mode in at least one preset elastic measurement mode, and executing the acquisition of measurement parameters corresponding to the target elastic measurement mode;
and under the condition that the echo signal data are matched with the reference parameters, generating and outputting elasticity measurement data corresponding to the tissue to be measured according to the echo signal data.
In one embodiment, the processor 1002 is further configured to determine, according to the echo signal data, position information of at least two time points on a propagation path of the ultrasonic wave in the tissue to be measured when the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, perform linear fitting on the position information of the at least two time points with the time points as independent variables and the position information as dependent variables, and calculate a sum of squares of residuals corresponding to the linear fitting as a fitting quality parameter; judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is the reference parameter corresponding to the vibration elasticity measurement mode based on the external force vibration; determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
In one embodiment, the processor 1002 is further configured to obtain waveform characteristic data of the echo signal data in a case that the target elasticity measurement mode is a shear wave measurement mode based on an acoustic radiation force; judging whether the waveform characteristic data is matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force; under the condition that the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameter; and under the condition that the waveform characteristic data are not matched with the preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
In one embodiment, the processor 1002 is further configured to receive at least one character string as a keyword; and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
In one embodiment, the processor 1002 is further configured to generate a prompt message indicating that the measurement fails and display an elastic measurement mode switching component when the echo signal data does not match the reference parameter; receiving an input switching operation through the elastic measurement mode switching assembly, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and executing the acquisition of the measurement parameters corresponding to the target elastic measurement mode.
In one embodiment, the processor 1002 is further configured to obtain a wavelength or a frequency corresponding to the target elasticity measurement mode; and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency so as to enable the ultrasonic waves emitted by the ultrasonic probe to correspond to the acquired wavelength or frequency.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (13)

1. An ultrasonic elasticity measurement method, characterized in that the method comprises:
determining a preset target elasticity measurement mode, acquiring measurement parameters corresponding to the target elasticity measurement mode, and setting an ultrasonic probe according to the measurement parameters;
transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through the ultrasonic probe, and receiving returned echo signal data;
determining a reference parameter corresponding to the target elasticity measurement mode, and judging whether the echo signal data is matched with the reference parameter;
under the condition that the echo signal data is not matched with the reference parameter, determining a selected elastic measurement mode as a target elastic measurement mode in at least one preset elastic measurement mode, and executing the acquisition of a measurement parameter corresponding to the target elastic measurement mode, wherein the elastic measurement mode comprises at least one of a vibration elastic measurement mode based on external force vibration, a shear wave measurement mode based on acoustic radiation force and/or a strain elastic measurement mode;
and under the condition that the echo signal data are matched with the reference parameters, generating and outputting elasticity measurement data corresponding to the tissue to be measured according to the echo signal data.
2. The method of claim 1, wherein the determining whether the echo signal data matches the reference parameter comprises:
under the condition that the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, determining the position information of at least two time points on the propagation path of the ultrasonic wave in the tissue to be measured according to the echo signal data, performing linear fitting on the position information of the at least two time points by taking the time points as independent variables and the position information as dependent variables, and calculating the square sum of residual errors corresponding to the linear fitting to be used as a fitting quality parameter;
judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is a reference parameter corresponding to a vibration elasticity measurement mode based on external force vibration;
determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold;
determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
3. The method of claim 1, wherein the determining whether the echo signal data matches the reference parameter comprises:
under the condition that the target elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force, acquiring waveform characteristic data of the echo signal data;
judging whether the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force;
under the condition that the waveform characteristic data are matched with preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameters;
and under the condition that the waveform characteristic data are not matched with preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
4. The method of claim 1, wherein determining the predetermined target elasticity measurement mode comprises:
receiving at least one character string as a keyword;
and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
5. The method of claim 1, wherein determining whether the echo signal data matches the reference parameter further comprises:
under the condition that the echo signal data are not matched with the reference parameters, generating prompt information of measurement failure, and displaying an elastic measurement mode switching component;
receiving an input switching operation through the elastic measurement mode switching component, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and executing the acquisition of the measurement parameters corresponding to the target elastic measurement mode.
6. The method according to claim 1, wherein the acquiring of the measurement parameter corresponding to the target elasticity measurement mode and the setting of the ultrasonic probe according to the measurement parameter comprise:
acquiring a wavelength or a frequency corresponding to the target elasticity measurement mode;
and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency so as to enable the ultrasonic waves emitted by the ultrasonic probe to correspond to the acquired wavelength or frequency.
7. An ultrasonic elasticity measurement device, comprising:
the target elasticity measurement mode determining module is used for determining a preset target elasticity measurement mode;
the parameter setting module is used for acquiring the measurement parameters corresponding to the target elasticity measurement mode and setting the ultrasonic probe according to the measurement parameters;
the echo signal data receiving module is used for transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured through the ultrasonic probe and receiving returned echo signal data;
the data checking module is used for determining a reference parameter corresponding to the target elasticity measurement mode and judging whether the echo signal data is matched with the reference parameter;
an elastic measurement mode switching module, configured to determine, when the echo signal data is not matched with the reference parameter, a selected elastic measurement mode as a target elastic measurement mode among at least one preset elastic measurement mode, and invoke the parameter setting module, where the elastic measurement mode includes at least one of a vibration elastic measurement mode based on external force vibration, a shear wave measurement mode based on acoustic radiation force, and/or a strain elastic measurement mode;
and the data output module is used for generating and outputting elastic measurement data corresponding to the tissue to be measured according to the echo signal data under the condition that the echo signal data is matched with the reference parameter.
8. The ultrasound elasticity measurement device of claim 7, wherein the data verification module is further configured to determine, according to the echo signal data, position information of at least two time points on a propagation path of the ultrasound in the tissue to be measured, if the target elasticity measurement mode is a vibration elasticity measurement mode based on external force vibration, perform linear fitting on the position information of the at least two time points with the time points as independent variables and the position information as dependent variables, and calculate a sum of squares of residuals corresponding to the linear fitting as a fitting quality parameter; judging whether the fitting quality parameter is smaller than a fitting quality parameter threshold value, wherein the fitting quality parameter threshold value is a reference parameter corresponding to a vibration elasticity measurement mode based on external force vibration; determining that the echo signal data matches the reference parameter if the fit quality parameter is less than the fit quality parameter threshold; determining that the echo signal data does not match the reference parameter if the fitting quality parameter is greater than or equal to the fitting quality parameter threshold.
9. The ultrasonic elasticity measurement device of claim 7, wherein the data verification module is further configured to obtain waveform characteristic data of the echo signal data when the target elasticity measurement mode is a shear wave measurement mode based on acoustic radiation force; judging whether the waveform characteristic data are matched with a preset reference parameter corresponding to the shear wave measuring mode based on the acoustic radiation force; under the condition that the waveform characteristic data are matched with preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are matched with the reference parameters; and under the condition that the waveform characteristic data are not matched with preset reference parameters corresponding to the shear wave measurement mode based on the acoustic radiation force, determining that the echo signal data are not matched with the reference parameters.
10. The ultrasonic elasticity measurement device of claim 7, wherein the target elasticity measurement mode determination module is further configured to receive at least one character string as a keyword; and in the at least one preset elasticity measurement mode, determining an elasticity measurement mode corresponding to the keyword as a target elasticity measurement mode according to the matching relationship between the preset elasticity measurement mode and the keyword.
11. The ultrasonic elasticity measurement device of claim 7, wherein the target elasticity measurement mode determining module is further configured to generate a prompt message of measurement failure and display an elasticity measurement mode switching component if the echo signal data does not match the reference parameter; and receiving input switching operation through the elastic measurement mode switching component, determining an elastic measurement mode corresponding to the switching operation as a target elastic measurement mode, and calling the parameter setting module.
12. The ultrasonic elasticity measurement device of claim 7, wherein the parameter setting module is further configured to obtain a wavelength or a frequency corresponding to the target elasticity measurement mode; and setting the emission parameters of the ultrasonic probe according to the acquired wavelength or frequency so as to enable the ultrasonic waves emitted by the ultrasonic probe to correspond to the acquired wavelength or frequency.
13. An ultrasonic elasticity measurement terminal is characterized in that the terminal comprises an ultrasonic probe, a processor, a memory and a display screen;
the processor is used for determining a preset target elasticity measurement mode, acquiring measurement parameters corresponding to the target elasticity measurement mode, and setting the ultrasonic probe according to the measurement parameters;
the ultrasonic probe is used for transmitting ultrasonic waves matched with the measurement parameters to the tissue to be measured and receiving returned echo signal data;
the processor is used for determining a reference parameter corresponding to the target elasticity measurement mode and judging whether the echo signal data is matched with the reference parameter;
the processor is further configured to determine a selected elasticity measurement mode as a target elasticity measurement mode among at least one preset elasticity measurement mode and perform the acquiring of the measurement parameter corresponding to the target elasticity measurement mode when the echo signal data is not matched with the reference parameter; and under the condition that the echo signal data are matched with the reference parameters, generating elastic measurement data corresponding to the tissue to be measured according to the echo signal data, and outputting the elastic measurement data through the display screen, wherein the elastic measurement mode comprises at least one of a vibration elastic measurement mode based on external force vibration, a shear wave measurement mode based on acoustic radiation force and/or a strain elastic measurement mode.
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