阅读说明：本技术 一种超声成像装置和方法、超声弹性检测装置和方法 (Ultrasonic imaging device and method, and ultrasonic elasticity detection device and method ) 是由 李双双 于 2018-08-24 设计创作，主要内容包括：一种剪切波产生方法及装置,包括：阵元一次性向感兴趣区域发射脉冲超声波,脉冲超声波在声场内至少形成两个焦点,以至少两个焦点为剪切波源形成沿与脉冲超声波发射方向垂直的方向传播的剪切波带。本发明同时公开一种剪切波超声弹性检测方法极其装置,由于在同一次脉冲超声波发射中,脉冲超声波在声场内会聚成多个焦点,在多个焦点的联合作用下,形成沿与脉冲超声波发射方向垂直的方向传播的剪切波带,从而扩大剪切波在组织内的传播范围,使得检测超声波可对大范围的组织进行弹性检测。(A shear wave generation method and apparatus comprising: the array elements transmit pulse ultrasonic waves to an interested area at one time, the pulse ultrasonic waves form at least two focuses in a sound field, and the at least two focuses are used as shear wave sources to form shear wave bands which are transmitted along the direction vertical to the transmitting direction of the pulse ultrasonic waves. The invention also discloses a shear wave ultrasonic elasticity detection method and a device thereof, because the pulse ultrasonic waves are converged into a plurality of focuses in the sound field in the same pulse ultrasonic wave emission, and a shear wave band which is transmitted along the direction vertical to the pulse ultrasonic wave emission direction is formed under the combined action of the focuses, thereby expanding the transmission range of the shear wave in the tissue and leading the detection ultrasonic wave to carry out elasticity detection on the tissue in a large range.)

A shear wave generation method, characterized by comprising:

an array element used for transmitting the pulse ultrasonic wave on the ultrasonic probe transmits the pulse ultrasonic wave to an interested area;

the pulsed ultrasonic wave forms at least two focuses in the sound field;

the pulse ultrasonic wave pushes the tissue, and at least two focuses are used as shear wave sources to form shear wave bands which are transmitted along the direction vertical to the transmitting direction of the pulse ultrasonic wave.

A shear wave ultrasonic elasticity detection method is characterized by comprising the following steps:

an array element used for transmitting the pulse ultrasonic wave on the ultrasonic probe transmits the pulse ultrasonic wave to an interested area;

the pulsed ultrasonic wave forms at least two focuses in the sound field;

the pulse ultrasonic wave pushes the tissue, and at least two focuses are respectively used as shear wave sources to form shear wave bands which are transmitted along the direction vertical to the transmitting direction of the pulse ultrasonic wave;

the array element for transmitting the detection ultrasonic wave continuously transmits the detection ultrasonic wave with preset time length to the propagation path of the shear wave band and receives the echo signal of the detection ultrasonic wave;

the elastic characteristic quantity is calculated from the echo signal.

A method as claimed in claim 1 or 2, wherein the elements of the ultrasound probe for transmitting pulsed ultrasound waves are divided into at least two groups, the pulsed ultrasound waves transmitted by each group being focused to a focal point.

A method as claimed in claim 3, wherein prior to transmitting the pulsed ultrasound wave from the array element, further comprising outputting to the array element of the ultrasound probe used to transmit the pulsed ultrasound wave parameters of a single transmission by which the array element is divided into at least two groups corresponding to respective focal points.

A method as claimed in claim 3, wherein different elements in each group have relative delays in transmission depending on their distance from the focal point, such that pulsed ultrasound transmitted by different elements in the group arrive at the corresponding focal points in the group at the same time.

The method of claim 5, wherein different groups of transmitted pulsed ultrasound waves arrive at respective groups of corresponding focal points simultaneously.

A method as claimed in claim 3, wherein the number of array elements in each group is determined according to the following formula:

fnumber ═ depth of focus/transmit aperture

The Fnumber is a characteristic value representing the focusing intensity, the focusing depth refers to the distance between a focal point and the surface of a tissue, the transmitting aperture refers to the width of a transmitting array element focused to the focal point, and the width of the transmitting array element is in direct proportion to the number of the array elements.

The method according to claim 1 or 2, wherein the at least two focal spots are distributed linearly or curvilinearly within the acoustic field.

An ultrasound imaging method characterized by comprising:

determining at least two focal points along the ultrasonic wave emission direction in the region of interest of the tested biological tissue;

outputting transmission parameters to array elements used for transmitting ultrasonic waves on an ultrasonic probe, wherein the transmission parameters enable the array elements used for transmitting the ultrasonic waves to be divided into at least two groups, and each group corresponds to a focus;

transmitting ultrasonic waves into the tissues by the array elements of each group according to the transmission parameters, and focusing on the corresponding focal points of the array elements of the group;

receiving an echo signal of the ultrasonic wave;

and generating an ultrasonic image according to the echo signal.

An ultrasonic elasticity detection device is characterized by comprising an ultrasonic probe, a transmitting and receiving controller and a data processor;

the ultrasonic probe comprises a plurality of array elements for transmitting pulse ultrasonic waves, wherein the array elements are at least used for transmitting the pulse ultrasonic waves to an interested area and forming at least two focuses in a sound field, and the pulse ultrasonic waves push tissues and form shear wave bands which are transmitted along the direction vertical to the transmitting direction of the pulse ultrasonic waves by taking the at least two focuses as shear wave sources; the ultrasonic probe is also used for continuously transmitting detection ultrasonic waves with preset time length to the propagation path of the shear wave band and receiving the echo waves of the ultrasonic waves;

the transmitting and receiving controller is used for generating ultrasonic transmitting parameters and outputting the ultrasonic transmitting parameters to the ultrasonic probe, and the ultrasonic transmitting parameters comprise pulse ultrasonic parameters or detection ultrasonic parameters;

the data processor is used for calculating the elastic characteristic quantity according to the echo of the ultrasonic wave.

The apparatus of claim 10, wherein the array elements of the ultrasound probe for transmitting the pulsed ultrasound waves are divided into at least two groups, each group corresponding to a focal point.

The apparatus of claim 11, wherein the parameters of the pulsed ultrasound are such that the elements used to transmit the pulsed ultrasound are grouped into at least two groups.

The apparatus of claim 11, wherein different elements in each group have relative transmit delays based on the distance of the element from the focal point, such that pulsed ultrasound waves transmitted by different elements in the group arrive at the corresponding focal points of the group at the same time.

The apparatus of claim 13, wherein different groups of transmitted pulsed ultrasound waves arrive at respective sets of corresponding focal points simultaneously.

The apparatus of claim 10, wherein the number of array elements in each group is determined according to the following equation:

fnumber ═ depth of focus/transmit aperture

The Fnumber is a characteristic value representing the focusing intensity, the focusing depth refers to the distance between a focal point and the surface of a tissue, the transmitting aperture refers to the width of a transmitting array element focused to the focal point, and the width of the transmitting array element is in direct proportion to the number of the array elements.

The apparatus of claim 10, wherein the at least two focal points are linearly or curvilinearly distributed within the acoustic field.

An ultrasonic imaging apparatus, comprising an ultrasonic probe, a transmission and reception controller, and a data processor;

the transmitting and receiving controller is used for determining at least two focuses in the region of interest of the tested biological tissue along the ultrasonic transmitting direction, and the transmitting and receiving controller is also used for generating ultrasonic transmitting parameters according to the determined at least two focuses and outputting the ultrasonic transmitting parameters to the ultrasonic probe;

the ultrasonic probe comprises a plurality of array elements which are arranged in an array manner, and transmits ultrasonic waves to an interested area of a tested biological tissue according to ultrasonic wave transmission parameters and receives echoes of the ultrasonic waves; the ultrasonic parameters are used for dividing array elements for transmitting ultrasonic waves into at least two groups, and the ultrasonic waves transmitted by each group are focused on one focal point;

the data processor is used for generating an ultrasonic image according to the echo signal.

A computer-readable storage medium characterized by comprising a program executable by a computer to implement the method of any one of claims 1-9.