WO2021016767A1

WO2021016767A1 - Ultrasonic endoscope probe and ultrasonic endoscope system

Info

Publication number: WO2021016767A1
Application number: PCT/CN2019/098029
Authority: WO
Inventors: 马腾; 李永川; 黄继卿; 王丛知
Original assignee: 深圳先进技术研究院
Priority date: 2019-07-26
Filing date: 2019-07-26
Publication date: 2021-02-04

Abstract

An ultrasonic endoscope probe and an ultrasonic endoscope system. The ultrasonic endoscope probe comprises a plurality of ultrasonic transducers (20) which are arranged in an annular array; the ultrasonic transducers (20) constitute a transducer array which is arranged in M rows and N columns, that is, each column of the transducer array is composed of at least two ultrasonic transducers (20); due to the transducer array, the ultrasonic endoscope probe not only has good focusing capability in an array distribution direction, but also achieves sound focusing in the extending direction of array elements in each column by changing a pore size, so that the ultrasonic endoscope probe can obtain uniform and consistent acoustic images in near, middle and far fields. Compared with an ultrasonic endoscope probe in the prior art, the detection range of the ultrasonic endoscope probe is greatly widened.

Description

Ultrasonic endoscope probe and ultrasonic endoscope system

Technical field

This application relates to the technical field of ultrasonic endoscopes, and more specifically, to an ultrasonic endoscope probe and an ultrasonic endoscope system.

Background technique

Endoscopic Ultrasonography System (EUS) is a medical device that integrates ultrasound and endoscopy. After the insertion part of the ultrasound endoscope enters the body cavity, under the direct vision of the ultrasound endoscope probe at the tip of the insertion part, a tomographic scan is performed on the wall of the internal organs or adjacent organs to obtain the levels below the mucosa of the internal organs and the surrounding adjacent organs. The ultrasound images of organs, such as the mediastinum, pancreas, bile ducts and lymph nodes, have great advantages in staging gastrointestinal tumors and judging the nature of tumors originating from the bowel wall.

The early ultrasonic endoscope system mainly uses mechanical scanning, using a micro-motor to drive the connecting rod to drive the single ultrasonic transducer at the top of the ultrasonic endoscope to achieve 360° rotation, so as to obtain a circular tomographic ultrasound image perpendicular to the axis; this This scanning method requires high-precision mechanical connection and driving equipment, and is easy to damage, and the ultrasound image obtained is not stable enough.

In order to solve the above-mentioned shortcomings of the ultrasonic endoscope system based on the mechanical scanning method to obtain the ultrasonic image, the researchers developed a 360° electronic circular scanning ultrasonic probe, combined with the color Doppler ultrasonic diagnostic equipment using all-digital image processing technology, to achieve a new type The purpose of fully digital ultrasound endoscopic imaging. This ultrasonic endoscope system does not need to be driven by a DC motor, avoids the shortcomings of mechanical circular scanning ultrasonic endoscopes, and is suitable for clinical applications such as large-scale scanning, overall evaluation and judgment.

But in the actual application process, it is found that this kind of 360° electronic circular scanning ultrasonic probe can only obtain better focusing ability in the array arrangement direction, and the detection range is small.

Summary of the invention

In order to solve the above technical problems, this application provides an ultrasonic endoscope probe and an ultrasonic endoscope system to solve the problem that the ultrasonic endoscope probe in the prior art can only achieve better results in the arrangement direction of the array element. Focusing ability, can detect problems in a small range.

In order to achieve the foregoing technical objectives, the embodiments of the present application provide the following technical solutions:

An ultrasonic endoscope probe, including:

Hard part

A plurality of ultrasonic transducers arranged in a ring array on the outer surface of the hard part, and the plurality of ultrasonic transducers are used as array elements to form a transducer array arranged in M rows×N columns, wherein Both M and N are positive integers greater than 1;

The transducer array is used to control part or all of the elements in the transducer array to work according to the work signal after receiving the work signal, so that the ultrasound endoscopic probe can work with the work signal. The depth of focus corresponding to the signal.

Optionally, the shape of the hard part is cylindrical;

The extension direction of the element in the transducer array is a preset direction;

The preset direction is a radial direction of the hard part.

Optionally, M=3, and the first row array element and the third row array element of each column array element in the transducer array are electrically connected as the first connection terminal;

The second row array element of each column of the array element in the transducer array is used as the second connection end;

The first connection terminal and the second connection terminal are connected by a first switch, and the closed state of the first switch is controlled by the working signal.

Optionally, the lengths of the first line array element and the third line array element in the preset direction are the same, and equal to half of the length of the second line array element in the preset direction.

Optionally, M=5, and the first row array element and the fifth row array element of each column of the array element in the transducer array are electrically connected as the first connection end;

The second row array element of each column of the array element in the transducer array is electrically connected to the fourth row array element as the second connection terminal;

The third row array element of each column of the array element in the transducer array serves as the third connection end.

Optionally, the sum of the lengths of the first row element and the fifth row element of each column of the transducer array in the preset direction is equal to that of the second row element and the fourth row element. The sum of the lengths in the preset direction is equal and equal to half of the length of the third row array element in the preset direction.

Optionally, M>5, and each element in the transducer array serves as a connection terminal to receive the working signal.

Optionally, each element in the transducer array has the same length in the preset direction.

Optionally, the transducer array includes: a plurality of positive electrodes arranged in a ring array;

A plurality of ultrasonic wafers located on the outer surface of the positive electrode, the ultrasonic wafers correspond to the positive electrode one to one;

The common electrode layer on the side of the ultrasonic wafer away from the positive electrode.

Optionally, the transducer array further includes:

Acoustic backings on the side of the multiple positive electrodes away from the ultrasonic wafer;

A first matching layer and a second matching layer located on the side of the common electrode layer away from the ultrasonic wafer;

An acoustic lens located on the side of the second matching layer away from the ultrasonic wafer.

Optional, also includes:

An acoustic coupling capsule wrapping the outside of the transducer array;

A coupling liquid is arranged in the acoustic coupling capsule.

An ultrasound endoscope system, comprising: the ultrasound endoscope probe as described in any one of the above.

It can be seen from the above technical solutions that the embodiments of the present application provide an ultrasonic endoscope probe and an ultrasonic endoscope system, wherein the ultrasonic endoscope probe includes a plurality of ultrasonic waves arranged in a circular array. Transducers, these ultrasonic transducers constitute a transducer array arranged in M rows×N columns, that is, each column of the transducer array is composed of at least two ultrasonic transducers, such a transducer The energy sensor array enables the ultrasonic endoscopic probe not only to have better focusing ability in the array arrangement direction, but also to achieve acoustic focusing by changing the aperture size in the extension direction of each array element, so that the ultrasonic The endoscopic probe can obtain uniform acoustic images in the near, middle and far fields. Compared with the ultrasonic endoscopic probe in the prior art, the detection range of the ultrasonic endoscopic probe is greatly improved.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present application. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative work.

Fig. 1 is a schematic diagram of the arrangement of ultrasonic transducers in an ultrasonic endoscope probe in the prior art;

Figure 2 is a schematic diagram of a 360-degree radial image of ultrasound echo;

3 is a schematic perspective view of an ultrasound endoscopic probe provided by an embodiment of the application;

4 is a schematic diagram of an arrangement of array elements in a transducer array according to an embodiment of the application;

5 is a schematic diagram of an arrangement of array elements in a transducer array provided by another embodiment of the application;

6 is a schematic diagram of an arrangement of array elements in a transducer array provided by another embodiment of the application;

FIG. 7 is a schematic diagram of an arrangement of array elements in a transducer array provided by still another embodiment of the application;

FIG. 8 is a schematic diagram of the electrical connection relationship of each array element in FIG. 4;

FIG. 9 is a schematic diagram of the electrical connection relationship of each array element in FIG. 5;

10 is a schematic diagram of the electrical connection relationship of each array element in FIG. 6;

11 is a schematic diagram of the electrical connection relationship of each array element in FIG. 7;

FIG. 12 is a schematic anatomical diagram of the internal structure of an ultrasound endoscopic probe provided by an embodiment of the application;

FIG. 13 is a schematic structural diagram of an ultrasound endoscopic probe provided by an embodiment of the application;

FIG. 14 is a schematic structural diagram of an ultrasound endoscope system provided by an embodiment of the application;

15 is a schematic diagram of the structure of a puncture needle provided by an embodiment of the application;

Fig. 16 is a schematic diagram of assembling a puncture needle provided by an embodiment of the application.

Detailed ways

As described in the background art, the 360° electronic circular scanning ultrasound probe in the prior art can only obtain better focusing ability in the array arrangement direction. For details, refer to FIG. 1, which is the 360° electronic probe in the prior art. A schematic diagram of the arrangement of an array composed of ultrasonic transducers in a circular scanning ultrasonic probe. In Figure 1, dozens to hundreds of elongated ultrasonic transducers are used as the array element Z1 to form the transducer array of the ultrasonic probe. These array elements Z1 are uniformly arranged cylindrically in the radial direction into a circle, and these array elements Z1 can be excited by electric pulses to obtain a 360° circular scanning image as shown in FIG. 2. The 360° electronic circular scanning ultrasound probe does not need to be driven by a DC motor, avoiding the disadvantages of mechanical circular scanning ultrasound endoscopes, and is suitable for large-scale scanning to provide ultrasound images for overall evaluation and judgment of clinical diagnosis.

However, this kind of 360° electronic circular scanning ultrasonic probe can only go to the higher electronic focusing ability in the array arrangement direction (that is, the X-axis direction in Figure 1), and cannot pass in the height direction (ie, the Y-axis direction in Figure 1). , Also for the extension direction of the ultrasonic transducer) adjust the aperture of the ultrasonic transducer to achieve acoustic focusing. Therefore, the detection range of the 360° electronic circular scanning ultrasonic probe is small.

In view of this, the embodiments of the present application provide an ultrasonic endoscope probe and an ultrasonic endoscope system, wherein the ultrasonic endoscope probe includes a plurality of ultrasonic transducers arranged in a ring array, These ultrasonic transducers constitute a transducer array arranged in M rows×N columns, that is, each column of the transducer array is composed of at least two ultrasonic transducers, such a transducer array makes The ultrasound endoscopic probe can not only have better focusing ability in the array arrangement direction, but also can achieve acoustic focusing by changing the aperture size in the extension direction of each array element, so that the ultrasound endoscopic probe A uniform acoustic image can be obtained in the near, middle, and far fields. Compared with the ultrasonic endoscope probe in the prior art, the detection range of the ultrasonic endoscope probe is greatly improved.

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

The embodiment of the present application provides an ultrasonic endoscopic probe. As shown in FIG. 3, the ultrasonic endoscopic probe includes:

Hard part 21a;

A plurality of ultrasonic transducers 20 arranged on the outer surface of the hard part 21a in a ring array, and the plurality of ultrasonic transducers 20 are used as array elements to form transducers arranged in M rows×N columns Array, where M and N are both positive integers greater than 1;

In addition to the hard part 21a and the array elements in the transducer array, FIG. 3 also shows the bending part 21 connected to the ultrasound endoscopic probe and arranged on the tip of the ultrasound endoscopic probe. The camera 36, the light source 35, the air injection hole 34, the water injection hole 33, the tip opening 31b and the treatment instrument channel 31a; the treatment instrument channel is used to set the needle tube of the puncture needle of the ultrasonic endoscope system.

In this embodiment, the ultrasound endoscopic probe includes a plurality of ultrasound transducers 20 arranged in a ring array, and these ultrasound transducers 20 constitute a transducer arranged in M rows×N columns. The transducer array, that is, each column of the transducer array is composed of at least two ultrasonic transducers 20. Such a transducer array enables the ultrasonic endoscopic probe not only to have a relatively high array arrangement direction. Good focusing ability, and acoustic focusing can also be achieved by changing the aperture size in the extension direction of each array element, so that the ultrasonic endoscopic probe can obtain uniform acoustic images in the near, middle, and far fields. Compared with the ultrasonic endoscope probe in the prior art, the detection range of the ultrasonic endoscope probe is greatly improved.

Optionally, still referring to FIG. 3, the shape of the hard part 21a is cylindrical;

The predetermined direction is the radial direction of the hard portion 21a.

Optionally, for the specific arrangement diagram of the transducer array, refer to Figs. 4-7. Figs. 4 and 7 respectively show solutions of transducer array elements with different numbers of rows. In Figures 4-7, the extension direction of the ultrasonic transducer 20 (that is, the longitudinal direction of the ultrasonic transducer 20) is used as the Y-axis extension direction to establish a right-handed coordinate system, and then the Y-axis extension direction of the coordinate system is said The preset direction may also be referred to as the height direction of the ultrasound endoscopic probe, and the X-axis extension direction is the extension direction of the "rows" of the elements in the transducer array. That is, M rows represent the number of array elements in each column extending along the Y-axis direction, and N columns represent the number of array elements in each row extending along the X-axis direction.

Specifically, referring to Figs. 4 and 8, Fig. 8 shows the electrical connection of each column array element in Fig. 4. In this embodiment, M=3, and each column array element in the transducer array The first line element and the third line element are electrically connected as the first connection terminal;

The second row array element of each column of the array element in the transducer array is used as the second connecting end. Preferably, the length of the second row array element in the predetermined direction is equal to the first row array element The sum of the length in the preset direction and the length of the third row array element in the preset direction;

The first connection terminal and the second connection terminal are connected through a first switch K1, and the closed state of the first switch K1 is controlled by the working signal.

In this embodiment, the array elements on both sides of the central array element in each array element are connected symmetrically; preferably, the first row array element and the third row array element are aligned in the preset direction. The length is the same and equal to half of the length of the second row array element in the preset direction, so that the impedance of the first row array element and the third row array element after being electrically connected is basically the same as the impedance of the second row array element , To facilitate the impedance matching of the element in the transducer array; of course, in other embodiments of the present application, the length of the first and third line elements in the preset direction can also be different , The length of the second row array element in the preset direction may not be twice the length of the first row array element or the second row array element in the preset direction, and this application does not do this limited.

In addition, in this embodiment, it is possible to change the acoustic focus depth of the ultrasound endoscopic probe by controlling the working states of the array elements in different positions in each array element of the transducer array. Specifically, when the first switch is turned off, only the second connecting terminal is used to provide the working signal for the second row array element in each array element. At this time, the working array in each array element of the ultrasound endoscopic probe The length of the element is small, so that the acoustic focus depth of the ultrasound endoscope probe is small; when the first switch is closed, the first connection end and the second connection end are simultaneously used for each array element All array elements provide working signals. At this time, the length of the working array element in each array element of the ultrasound endoscope probe is larger, so that the acoustic focus depth of the ultrasound endoscope probe is larger.

In this embodiment, the first connection terminal and the second connection terminal can be used as receiving terminals to receive signals, or as transmitting terminals to transmit signals.

Optionally, referring to FIGS. 5 and 9, FIG. 9 shows the electrical connection mode of each array element in FIG. 5. In this embodiment, M=5, and each array element in the transducer array The first line of array element and the fifth line of array element are electrically connected as the first connection terminal 1;

The second row array element of each column array element in the transducer array is electrically connected to the fourth row array element as the second connection terminal 2;

The third row array element of each column of the array element in the transducer array is used as the third connecting terminal 3; preferably, the first row array element and the fifth row array element of each column of the array element in the transducer array are The sum of the lengths in the preset direction is equal to the sum of the lengths of the second and fourth line array elements in the preset direction, and is equal to half of the length of the third line array elements in the preset direction.

Similar to the transducer array shown in Fig. 4, in the transducer array shown in Fig. 5, the array elements on both sides of the central array element in each array element are symmetrically connected, and each of the transducer arrays The length of the third row of a row of array elements in the preset direction is equal to the length of the first, second, fourth, and fifth row of array elements in the preset direction In this way, the impedance of the symmetrically connected array elements on both sides is basically the same as the impedance of the third row of array elements, which facilitates the impedance matching of the array elements in the transducer array. Of course, in other embodiments of the present application, the lengths of the first, second, fourth, and fifth line elements in the preset direction may also be different, and the first The length of the three-line array element in the preset direction may not be twice the length of the first, second, fourth, and fifth-line array elements in the preset direction, This application does not limit this.

Similarly, in this embodiment, the acoustic focus depth of the ultrasound endoscopic probe can be changed by controlling the delay time of the array elements in different positions in each array element of the transducer array. Specifically, the delay time of the first and fifth row elements in each column is the same, and the delay time of the second and fourth row elements is the same; in the actual application process, when a higher focus is required When the depth is low, all the elements in each array can be controlled to be in working state, and the sound beam is excited and the working signal is received; when it is necessary to reduce some focus depth, it can control the first row of array elements and the The fifth line element stops working or the second line element and the fourth line element stop working; when it is necessary to reduce the focus depth again, the first line element, the second line element, and the Both the four-line element and the fifth-line element stopped working.

Similarly, in this embodiment, the first connection terminal, the second connection terminal, and the third connection terminal can be used as receiving terminals to receive signals, or as transmitting terminals to transmit signals.

It should be noted that, in this embodiment, the sound beam excited by the probe of the ultrasonic transducer 20 can be focused in the XOZ plane.

Optionally, referring to Figures 6, 7, 10 and 11, Figure 10 shows the electrical connection of each array element in Figure 6, and Figure 11 shows the electrical connection of each array element in Figure 7. In this embodiment, M>5, and each element in the transducer array serves as a connection terminal to receive the working signal;

Preferably, the length of each element in the transducer array in the predetermined direction is the same. Of course, in other embodiments of the present application, the length of each element in the transducer array in the predetermined direction may also be different, which is not limited in the present application.

In this embodiment, all elements in the transducer array are individually connected, that is, all element channels are independent, and the excitation and reception states of different elements in the transducer array can be controlled. , To achieve the change of the acoustic focus depth of the ultrasound endoscope probe and the deflection of the acoustic focus direction.

The number of array elements in each column in Fig. 7 is more than the number of array elements in each column in the transducer array shown in Fig. 6. The sound beams of the transducer arrays shown in Fig. 6 and Fig. 7 can not only be used in XOZ In-plane focusing can also achieve beam deflection in the Y direction.

Similarly, the connecting end in this embodiment can be used as a receiving end to receive signals, or as a transmitting end to transmit signals.

It should be noted that Figures 4-7 show several feasible arrangements of the array elements in the transducer array. In other embodiments of the present application, the value of M can also be 2, 4, etc. , This application does not limit this, and it depends on the actual situation.

On the basis of the foregoing embodiment, an embodiment of the present application provides a specific structure of a transducer array. As shown in FIG. 12, the transducer array includes: a plurality of arrays arranged in a ring array. Positive electrode 201;

A plurality of ultrasonic wafers 202 located on the outer surface of the positive electrode 201, the ultrasonic wafers 202 correspond to the positive electrodes 201 one-to-one;

The common electrode layer 203 on the side of the ultrasonic wafer 202 away from the positive electrode 201.

The ultrasonic wafer 202 may be any one of piezoelectric ceramics, ceramic composite materials, single crystal materials, single crystal composite materials, and CMUT.

Optionally, still referring to FIG. 12, the transducer array further includes:

Acoustic backing 204 on the side of the plurality of positive electrodes 201 away from the ultrasonic wafer 202;

The first matching layer 205 and the second matching layer 206 on the side of the common electrode layer 203 away from the ultrasonic wafer 202;

An acoustic lens (not shown in FIG. 12) on the side of the second matching layer 206 away from the ultrasonic wafer 202.

In addition, FIG. 12 also shows epoxy resin 208 filled between the plurality of ultrasonic wafers, and a circuit board 207 electrically connected to the plurality of ultrasonic transducers 20.

The multiple positive electrodes, multiple ultrasonic wafers, and the common electrode layer are the main functional structures of the transducer array, and multiple positive electrodes and multiple ultrasonic wafers share one common electrode layer , Constitute a plurality of arrays of ultrasonic transducers.

The acoustic backing on the one hand attenuates the acoustic energy emitted from the back of the ultrasonic probe, and on the other hand supports the entire probe, which is beneficial to the outward transmission of the short-signal sound beam excited by the ultrasonic chip. It is beneficial to improve the resolution of the ultrasound endoscope probe;

The first matching layer and the second matching layer are beneficial to improve the degree of impedance matching between the ultrasonic transducer 20 and the measured human body;

The acoustic lens is used to improve the focusing degree of the acoustic beam excited by the ultrasonic wafer, thereby improving the signal-to-noise ratio of the ultrasonic endoscopic probe.

Optionally, in another embodiment of the present application, as shown in FIG. 13, the ultrasound endoscopic probe further includes:

Wrap the acoustic coupling capsule 90 outside the transducer array;

The acoustic coupling capsule 90 is provided with a coupling liquid.

The material for the acoustic coupling capsule 90 is generally a silicone rubber or similar material with low sound attenuation and biocompatibility, which is required to have certain elasticity and be able to withstand a certain pressure.

The coupling liquid may be a liquid whose deionized water is equal to the impedance of the human body. The acoustic coupling capsule is beneficial to further improve the impedance matching between the ultrasonic endoscope probe and the measured human body, and is beneficial to the outward propagation of the excited sound beam.

The ultrasound endoscope system provided by the embodiments of the present application will be described below, and the parts related to the ultrasound endoscope probe described below may correspond to the above.

Correspondingly, as shown in FIGS. 14-16, the ultrasonic endoscope system includes a display device 5, an ultrasonic observation device 4, and an insertion part 24;

The top end of the insertion portion 24 is used to set the ultrasound endoscopic probe;

The ultrasound endoscopic probe is the ultrasound endoscopic probe as described in any of the above embodiments.

In addition, the ultrasound endoscope system further includes: an operating portion 22 provided on the proximal end of the insertion portion 24, a universal cable 13 extending from the side of the operating portion 22, and a halfway portion of the universal cable 13 Branched light source cable 16;

An ultrasonic connector 14a is provided at the proximal end of the cable 14 of the ultrasonic endoscope probe. The ultrasonic connector 14a can be attached to and removed from the ultrasonic observation device 4. An endoscope connector 16a is provided at the base end of the light source cable 16, and the endoscope connector 16a can be attached to and detached from the light source device 6 and the video processor device.

A treatment tool insertion port 27a is provided on the distal end side of the operation portion 22. The treatment tool penetration ports 27a are respectively communicated with treatment tool channels 31a (refer to FIG. 3 in combination) provided in the insertion portion 24. The treatment tool penetration hole 27a has a pipe joint, and a fixing ring 30 is connected to the pipe joint, and the fixing ring 30 is provided on the handle portion 31 of the puncture needle 3 and the like. The fixing ring 30 can be installed and removed from the pipe interface. Furthermore, the needle tube 80 of the puncture needle 3 penetrates the treatment instrument channel 31a via the treatment instrument penetration hole 27a (refer to FIGS. 3, 14 and 15 in combination). The insertion portion 24 is provided with a distal hard portion 21a, a bending portion 21, and a flexible tube portion 23 in order from the distal end side thereof. For example, by operating the bending operation knobs 28a and 28b, it can be actively bent in the up, down, left and right directions. The flexible tube portion 23 has flexibility.

The treatment instrument channel 31a has a distal opening 31b on the distal end surface 21d of the distal hard portion 21a. The treatment instrument channel 31a has a central axis in the vicinity of the tip opening 31b, and can be inserted into a treatment instrument for puncture or the like.

In summary, the embodiments of the present application provide an ultrasonic endoscope probe and an ultrasonic endoscope system, wherein the ultrasonic endoscope probe includes a plurality of ultrasonic transducers arranged in a ring array These ultrasonic transducers constitute a transducer array arranged in M rows×N columns, that is, each column of the transducer array is composed of at least two ultrasonic transducers, such a transducer array So that the ultrasonic endoscope probe can not only have better focusing ability in the array arrangement direction, but also can achieve acoustic focusing by changing the aperture size in the extension direction of each array element, so that the ultrasonic endoscope The probe can obtain uniform acoustic images in the near, middle and far fields. Compared with the ultrasonic endoscope probe in the prior art, the detection range of the ultrasonic endoscope probe is greatly improved.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined in this document can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, this application will not be limited to the embodiments shown in this document, but should conform to the widest scope consistent with the principles and novel features disclosed in this document.

Claims

An ultrasound endoscopic probe, which is characterized in that it comprises:

Hard part

A plurality of ultrasonic transducers arranged in a ring array on the outer surface of the hard part, and the plurality of ultrasonic transducers are used as array elements to form a transducer array arranged in M rows×N columns, wherein Both M and N are positive integers greater than 1;

The transducer array is used to control part or all of the elements in the transducer array to work according to the work signal after receiving the work signal, so that the ultrasound endoscopic probe can work with the work signal. The depth of focus corresponding to the signal.
The ultrasound endoscopic probe according to claim 1, wherein the shape of the hard part is cylindrical;

The extension direction of the element in the transducer array is a preset direction;

The preset direction is a radial direction of the hard part.
The ultrasound endoscopic probe according to claim 2, wherein M=3, and the first row element and the third row element of each column of the transducer array are electrically connected as the first Connecting end

The second row array element of each column of the array element in the transducer array is used as the second connection end;

The first connection terminal and the second connection terminal are connected by a first switch, and the closed state of the first switch is controlled by the working signal.
The ultrasound endoscopic probe according to claim 3, wherein the lengths of the first row array element and the third row array element in the predetermined direction are the same and equal to the length of the second row Half of the length of the array element in the preset direction.
The ultrasonic endoscopic probe according to claim 2, wherein M=5, and the first row element and the fifth row element of each column of the transducer array are electrically connected as the first connection end;

The second row array element of each column of the array element in the transducer array is electrically connected to the fourth row array element as the second connection terminal;

The third row array element of each column of the array element in the transducer array serves as the third connection end.
The ultrasound endoscopic probe according to claim 5, wherein the sum of the lengths of the first row element and the fifth row element of each column element in the transducer array in a predetermined direction is The sum of the lengths of the second line element and the fourth line element in the preset direction is equal and equal to half of the length of the third line element in the preset direction.
The ultrasonic endoscopic probe according to claim 2, wherein M>5, and each element in the transducer array serves as a connection terminal to receive the working signal.
8. The ultrasound endoscopic probe according to claim 7, wherein the length of each element in the transducer array in the predetermined direction is the same.
The ultrasound endoscopic probe according to claim 1, wherein the transducer array comprises: a plurality of positive electrodes arranged in a ring array;

A plurality of ultrasonic wafers located on the outer surface of the positive electrode, the ultrasonic wafers correspond to the positive electrode one to one;

The common electrode layer on the side of the ultrasonic wafer away from the positive electrode.
The ultrasound endoscopic probe according to claim 9, wherein the transducer array further comprises:

Acoustic backings on the side of the multiple positive electrodes away from the ultrasonic wafer;

A first matching layer and a second matching layer located on the side of the common electrode layer away from the ultrasonic wafer;

An acoustic lens located on the side of the second matching layer away from the ultrasonic wafer.
The ultrasonic endoscopic probe of claim 1, further comprising:

An acoustic coupling capsule wrapping the outside of the transducer array;

A coupling liquid is arranged in the acoustic coupling capsule.
An ultrasonic endoscope system, characterized by comprising: the ultrasonic endoscope probe according to any one of claims 1-11.