阅读说明：本技术 一种剪切波成像方法及系统 (Shear wave imaging method and system ) 是由 李双双 于 2018-07-26 设计创作，主要内容包括：一种剪切波成像方法及系统,其根据超声回波信号,获得沿剪切波传播路径上不同位置处的组织信息(S30),获取至少两个剪切波传播描绘起点(S40),分析从所述至少两个剪切波传播描绘起点开始剪切波传播描绘路径上剪切波随时间变化的传播差异(S50),描绘感兴趣区域内所述至少两个剪切波传播描绘起点所对应的剪切波传播描绘路径上所述不同位置处剪切波的传播差异,生成剪切波传播图(S60)；剪切波传播图可以用于提供评价剪切波传播质量的相关信息,可以反映不同位置剪切波的传播质量好坏,剪切波的成像可信度高低,使得用户避开传播质量较差或成像可信度较低的部分,提升诊断质量。(A shear wave imaging method and system, it is according to the ultrasonic echo signal, obtain the tissue information (S30) at different positions along the propagation path of the shear wave, obtain at least two shear wave propagation and draw the starting point (S40), analyze from said at least two shear wave propagation and draw propagation difference (S50) that the shear wave changes with time on the propagation path of the shear wave from said at least two shear wave propagation and draw the starting point, draw the propagation difference of the shear wave at said different positions on the propagation path of the shear wave that said at least two shear wave propagation and draw the starting point and correspond in the area of interest, produce the propagation map of the shear wave (S60); the shear wave propagation diagram can be used for providing relevant information for evaluating the shear wave propagation quality, and can reflect the propagation quality of the shear wave at different positions and the imaging reliability of the shear wave, so that a user can avoid the part with poor propagation quality or low imaging reliability, and the diagnosis quality is improved.)

A method of shear wave imaging, comprising:

generating at least one shear wave in the target tissue;

transmitting an ultrasonic beam for detecting shear waves to a region of interest on a shear wave propagation path to obtain an ultrasonic echo signal;

obtaining tissue information at different positions along a shear wave propagation path according to the ultrasonic echo signal;

acquiring at least two shear wave propagation description starting points;

analyzing propagation differences of the shear waves over time on the shear wave propagation tracing paths from the at least two shear wave propagation tracing starting points;

and depicting the propagation difference of the shear wave at different positions on the shear wave propagation depicting path corresponding to the at least two shear wave propagation depicting starting points in the region of interest, and generating a shear wave propagation map.

The method of shear wave imaging according to claim 1, wherein said propagation differences comprise at least one of:

positions where the shear wave arrives at a plurality of times on the shear wave propagation tracing path corresponding to the propagation start points, respectively, from the at least two shear wave propagation tracing start points; and

starting from the at least two shear wave propagation tracing starting points, the shear wave propagation tracing paths corresponding to the propagation starting points reach a plurality of positions.

The shear wave imaging method of claim 2, wherein:

the plurality of moments comprise two moments or at least three moments, and when the plurality of moments comprise at least three moments, the time intervals between every two adjacent moments are equal; and/or the presence of a gas in the gas,

the plurality of positions includes two positions or at least three positions, and when at least three positions are included, distances between respective adjacent positions are equally spaced.

A method according to claim 2 or 3, wherein said describing propagation differences of shear waves at said different positions on the paths of the tracing of shear wave propagation corresponding to said at least two tracing start points of shear wave propagation within the region of interest, and wherein generating the map of shear wave propagation comprises at least one of:

depicting the positions of the shear waves arriving at a plurality of moments respectively on the shear wave propagation depicting paths corresponding to the at least two shear wave propagation depicting starting points in the region of interest, and generating a shear wave propagation graph; and

and depicting the time of arrival of the shear wave at a plurality of positions on a shear wave propagation depicting path corresponding to the at least two shear wave propagation depicting starting points in the region of interest, and generating the shear wave propagation map.

The shear wave imaging method of claim 4, wherein said mapping the positions of the shear waves arriving at the respective times on the shear wave propagation mapping paths corresponding to the at least two shear wave propagation mapping start points in the region of interest, and wherein generating the shear wave propagation map comprises:

connecting specific positions where shear waves from different propagation starting points arrive at the same time to form a position change curve, drawing the position change curves corresponding to a plurality of times, and generating a shear wave position arrival change diagram.

The shear wave imaging method of claim 4, wherein said plotting the time instants, on the shear wave propagation tracing path corresponding to said at least two shear wave propagation tracing start points, of arrival at a plurality of positions within the region of interest, and wherein generating said shear wave propagation map comprises:

the arrival times of the shear waves starting from different propagation starting points at the same propagation path position are connected to form a time variation curve, the time variation curves corresponding to the propagation path positions are drawn, and a shear wave time arrival variation graph is generated.

The method of shear wave imaging of claim 1, wherein said shear wave propagation delineation origins are arranged in a same depth direction.

The shear wave imaging method of claim 1, wherein said delineating the propagation differences of the shear wave at said different locations on the shear wave propagation delineation path corresponding to said at least two shear wave propagation delineation starting points within the region of interest, and wherein generating the shear wave propagation map comprises:

drawing a rectangular coordinate system, taking the position along the depth direction as a vertical coordinate, and taking time or a plurality of positions along a shear wave propagation path as a horizontal coordinate;

the propagation difference is depicted in the rectangular coordinate system.

The shear wave imaging method of claim 1, further comprising:

transmitting an ultrasonic beam to the target tissue and receiving echo information of the ultrasonic beam to obtain an echo signal for forming an ultrasonic image;

generating an ultrasonic image of the target tissue according to the echo signal for forming the ultrasonic image;

displaying the ultrasonic image;

displaying the shear wave propagation map on the ultrasound image.

The shear wave imaging method of claim 9, further comprising: and calculating tissue elasticity parameters along the propagation path of the shear wave according to the ultrasonic echo signals of the ultrasonic beam of the detected shear wave, and displaying the tissue elasticity parameters.

A shear wave imaging system, comprising:

a probe which comprises a transducer and transmits an ultrasonic beam into a target tissue through the transducer to track a shear wave propagating in the target tissue and receives an ultrasonic echo to obtain an ultrasonic echo signal;

the processor is used for acquiring tissue information at different positions along a shear wave propagation path according to the ultrasonic echo signal; and the system is used for acquiring at least two shear wave propagation drawing starting points, analyzing the propagation difference of the shear wave along the time change on the shear wave propagation drawing path from the at least two shear wave propagation drawing starting points, and drawing the propagation difference of the shear wave at different positions on the shear wave propagation drawing path corresponding to the at least two shear wave propagation drawing starting points in the region of interest to generate a shear wave propagation map.

The shear wave imaging system of claim 11, wherein said propagation differences comprise at least one of:

positions where the shear wave arrives at a plurality of times on the shear wave propagation tracing path corresponding to the propagation start points, respectively, from the at least two shear wave propagation tracing start points; and

starting from the at least two shear wave propagation tracing starting points, the shear wave propagation tracing paths corresponding to the propagation starting points reach a plurality of positions.

The shear wave imaging system of claim 12, wherein:

the plurality of moments comprise two moments or at least three moments, and when the plurality of moments comprise at least three moments, the time intervals between every two adjacent moments are equal; and/or the presence of a gas in the gas,

the plurality of positions includes two positions or at least three positions, and when at least three positions are included, distances between respective adjacent positions are equally spaced.

The shear wave imaging system of claim 12 or 13, wherein the processor:

depicting the positions of the shear waves arriving at a plurality of moments respectively on the shear wave propagation depicting paths corresponding to the at least two shear wave propagation depicting starting points in the region of interest so as to generate the shear wave propagation map; or

And depicting the time of arrival of the shear wave at a plurality of positions on a shear wave propagation depicting path corresponding to the at least two shear wave propagation depicting starting points in the region of interest so as to generate the shear wave propagation map.

The shear wave imaging system of claim 14, wherein said processor further connects specific locations where shear waves from different propagation origins arrive at the same time to form a position variation curve, and plots the position variation curves corresponding to a plurality of times to generate the shear wave position arrival variation map.

The shear wave imaging system of claim 14, wherein said second processor further connects the arrival times of shear waves from different propagation origins at the same propagation path position to form a time variation curve, and plots the time variation curves corresponding to a plurality of propagation path positions to generate the shear wave time arrival variation map.

The shear wave imaging system of claim 11, wherein of said at least two shear wave propagation delineation origins acquired by said processor, each shear wave propagation delineation origin is along a same depth direction.

The shear wave imaging system of claim 11, wherein the processor further plots a rectangular coordinate system with position along the depth direction as ordinate and time, or a plurality of positions along the shear wave propagation path, as abscissa; and depicting the propagation difference in the rectangular coordinate system.

The shear wave imaging system of claim 11, further comprising a display unit, wherein:

the probe emits ultrasonic beams to the target tissue and receives echo information of the ultrasonic beams to obtain echo signals for forming ultrasonic images;

the processor generates an ultrasonic image of the target tissue according to the echo signal for forming the ultrasonic image;

the display unit displays the ultrasonic image and displays the shear wave propagation map.

The shear wave imaging system of claim 19, wherein said processor further calculates a tissue elasticity parameter along a shear wave propagation path from an ultrasound echo signal of an ultrasound beam of said detected shear wave, and said display unit is configured to display said tissue elasticity parameter superimposed on said ultrasound image.

A method of shear wave imaging, comprising:

generating at least one shear wave in the target tissue;

emitting an ultrasonic beam into the target tissue to track the propagation of the shear wave, obtaining an ultrasonic echo signal;

obtaining arrival information of the shear waves at different positions in the target tissue according to the ultrasonic echo signals;

generating a shear wave propagation diagram according to the arrival information;

displaying the shear wave propagation diagram.

The method of claim 21, wherein: obtaining arrival information at different locations of the shear wave within the target tissue from the ultrasound echo signals comprises:

determining tissue motion parameters at different positions in the target tissue according to the ultrasonic echo signals;

and determining arrival information of the shear waves at different positions in the target tissue according to the tissue motion parameters.

The method of claim 22, wherein: the tissue motion parameters include tissue displacement and/or tissue motion velocity.

The method of any one of claims 21 to 23, wherein: the arrival information is a position at which the shear wave arrives on the shear wave propagation path at a plurality of times.

The method of claim 24, wherein: generating a shear wave propagation map from the arrival information comprises:

establishing a rectangular coordinate system, wherein one coordinate axis of the rectangular coordinate system represents the depth of the target tissue, and the other coordinate axis represents the position on a shear wave propagation path;

the positions reached by the shear wave on a shear wave propagation path at the plurality of time instants are depicted in the rectangular coordinate system.

The method of claim 25, further comprising: in the rectangular coordinate system, a plurality of positions where the shear wave arrives at the same time are marked.

The method of any one of claims 21 to 23, wherein: the arrival information is the time at which the shear wave arrives at a plurality of locations on the shear wave propagation path.

The method of claim 27, wherein: generating a shear wave propagation map from the arrival information comprises:

establishing a rectangular coordinate system, wherein one coordinate axis of the rectangular coordinate system represents the depth of the target tissue, and the other coordinate axis represents time;

the time of arrival of the shear wave at a plurality of locations on the shear wave propagation path is plotted in the rectangular coordinate system.

The method of claim 28, further comprising: in the rectangular coordinate system, a plurality of times at which the shear wave arrives at a position at the same distance from a shear wave source are marked.

A shear wave imaging system, comprising:

a probe which comprises a transducer and transmits an ultrasonic beam into a target tissue through the transducer to track a shear wave propagating in the target tissue and receives an ultrasonic echo to obtain an ultrasonic echo signal;

the processor obtains arrival information of the shear waves at different positions in the target tissue according to the ultrasonic echo signals and generates a shear wave propagation diagram according to the arrival information;

a display unit that displays the shear wave propagation map.

The system of claim 30, wherein: the processor

Determining tissue motion parameters at different positions in the target tissue according to the ultrasonic echo signals;

and determining arrival information of the shear waves at different positions in the target tissue according to the tissue motion parameters.

The method of claim 31, wherein: the tissue motion parameters include tissue displacement and/or tissue motion velocity.

The method of any one of claims 30 to 32, wherein: the arrival information is a position at which the shear wave arrives on the shear wave propagation path at a plurality of times.

The method of claim 33, wherein: the processor generating a shear wave propagation map from the arrival information comprises:

establishing a rectangular coordinate system, wherein one coordinate axis of the rectangular coordinate system represents the depth of the target tissue, and the other coordinate axis represents the position on a shear wave propagation path;

the positions reached by the shear wave on a shear wave propagation path at the plurality of time instants are depicted in the rectangular coordinate system.

The method of claim 34, wherein the processor further marks multiple positions in the cartesian coordinate system where the shear wave arrives at the same time.

The method of any one of claims 30 to 32, wherein: the arrival information is the time at which the shear wave arrives at a plurality of locations on the shear wave propagation path.

The method of claim 36, wherein: the processor generating a shear wave propagation map from the arrival information comprises:

establishing a rectangular coordinate system, wherein one coordinate axis of the rectangular coordinate system represents the depth of the target tissue, and the other coordinate axis represents time;

the time of arrival of the shear wave at a plurality of locations on the shear wave propagation path is plotted in the rectangular coordinate system.

The method of claim 37, wherein the processor further marks a plurality of times that the shear wave arrives at a location that is the same distance from a shear wave source in the cartesian coordinate system.