Ultrasonic puncture guiding system and method thereof

Abstract

The invention discloses an ultrasonic puncture guiding system and method, and the system comprises an ultrasonic diagnosis probe which is used for obtaining a corresponding ultrasonic image according to an ultrasonic diagnosis excitation signal; the puncture needle is used for receiving an ultrasonic signal excited by the ultrasonic diagnosis probe when the ultrasonic diagnosis probe obtains the ultrasonic image and transmitting the ultrasonic signal to the signal receiving unit; the signal receiving and processing unit is used for receiving an ultrasonic signal transmitted by a receiving type ultrasonic transducer on the puncture needle and an ultrasonic diagnosis excitation signal of an ultrasonic diagnosis unit, so that a voltage amplitude signal and signal delay are obtained, and the position and the movement tendency of the needle point of the puncture needle are obtained; and the ultrasonic diagnosis unit is used for presenting the position and the movement tendency of the needle point of the puncture needle on an ultrasonic image. The invention solves the adverse influence of the puncture angle and the puncture tangent surface of the puncture needle on ultrasonic guided puncture, improves the guide effect under the conditions of large angle and tangent surface deviation of the puncture needle, reduces the operation difficulty of doctors, reduces the learning cost and improves the puncture efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic puncture, and in particular to an ultrasonic puncture guiding system and method thereof. Background Art

[0002] Ultrasound-guided puncture and biopsy is a method of puncturing living tissue under the real-time monitoring and guidance of ultrasound instruments to obtain cell and pathological diagnosis. It has been carried out as early as the 1970s. At present, ultrasound-guided puncture biopsy has become a very mature and very important diagnostic technology. There is a puncture groove in the center of the ultrasound probe, and the puncture needle passes through the puncture groove for puncture biopsy.

[0003] Although ultrasound-guided puncture has gradually become an indispensable means in clinical practice, this technology still has many limitations. For example, the display of the puncture needle is not good in actual use. There are many cases where the puncture needle cannot be seen or the needle tip cannot be found. There are two main reasons for this:

[0004] The first is the effect of angle. Since the surface of the puncture needle is smooth, it will produce mirror reflection of the incident sound waves. The more inclined the puncture needle is, the fewer sound waves can return to the probe, and the puncture needle is less likely to be visualized.

[0005] The second is the impact of the misalignment between the puncture needle and the ultrasound imaging section. Ultrasound imaging obtains a section image. If the puncture needle enters on this section, the puncture needle will be displayed better. However, during the actual puncture process, it is difficult for the doctor to ensure this. Slightly moving the probe or rotating the puncture needle may cause it to deviate from the imaging section, resulting in the puncture needle not being displayed or being displayed incompletely. In some cases, the doctor will even deliberately insert the needle from outside the imaging section, making the position of the puncture needle even more difficult to display. Summary of the invention

[0006] Purpose of the invention: In view of the above-mentioned shortcomings, the present invention proposes an ultrasonic puncture guidance system and method thereof to solve the adverse effects of the puncture angle and puncture section of the puncture needle on ultrasonic-guided puncture, improve the guidance effect when the puncture needle has a large angle and the section deviates, reduce the difficulty of operation for doctors, reduce the learning cost, and improve the puncture efficiency.

[0007] Technical solution:

[0008] The present invention provides an ultrasonic puncture guidance system, comprising:

[0009] An ultrasonic diagnostic probe, which is disposed at the patient's affected part and is used to obtain a corresponding ultrasonic image according to an ultrasonic diagnostic excitation signal sent by an ultrasonic diagnostic unit connected thereto;

[0010] A puncture needle, on which a receiving type ultrasonic transducer is provided, for receiving the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, and transmitting it to a signal receiving unit connected thereto;

[0011] The signal receiving and processing unit is connected to the puncture needle and the ultrasonic diagnosis unit respectively, and is used to receive the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit, and obtain the voltage amplitude signal and signal delay based on the received ultrasonic transducer, so as to obtain the position and movement tendency of the puncture needle tip;

[0012] The ultrasonic diagnostic unit is used to send ultrasonic diagnostic excitation signals to the ultrasonic diagnostic probe and the signal receiving unit, and simultaneously obtain the ultrasonic image obtained by the ultrasonic diagnostic probe and the position and movement tendency of the puncture needle tip obtained by the signal receiving and processing unit, and present the position and movement tendency of the puncture needle tip on the ultrasonic image.

[0013] Specifically, the position of the puncture needle tip is determined by the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe, wherein the distance between the puncture needle tip and the ultrasonic diagnostic probe is obtained by signal delay calculation, and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe is determined by the voltage amplitude signal.

[0014] More specifically, the distance between the puncture needle tip and the ultrasonic diagnostic probe is calculated based on the signal delay and the ultrasonic sound velocity in the human body.

[0015] More specifically, the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe is calculated as follows:

[0016] When the diagnostic ultrasound probe performs line scanning, when the scanning line closest to the receiving ultrasound transducer on the puncture needle is excited, the voltage signal amplitude generated by the receiving ultrasound transducer is the largest. At this time, the relative direction between the axial direction of the puncture needle and the axial direction of the diagnostic ultrasound probe is calculated based on the scanning line.

[0017] More specifically, based on the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative positional relationship between the puncture needle tip and the ultrasonic diagnostic probe, when the puncture needle is not displayed on the ultrasonic image, the needle tip portion of the puncture needle is presented as an outline of a set range in the ultrasonic image.

[0018] Further, the outline is presented as follows:

[0019] The position of the puncture needle tip is obtained according to the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe, and the outline of the set range is determined with the position as the center.

[0020] Furthermore, as the puncture needle is fine-tuned, the ultrasonic diagnostic unit presents the position and movement tendency of the puncture needle tip on the ultrasonic image:

[0021] When the voltage amplitude signal becomes smaller, the outline size is increased and its color is marked as red;

[0022] When the voltage amplitude signal becomes larger, the outline size is reduced and its color is marked as blue;

[0023] When the puncture needle is located in the imaging plane, the outline size is the smallest and its color is marked as green.

[0024] Specifically, the movement tendency of the puncture needle tip is obtained as follows:

[0025] The change in the magnitude of the voltage amplitude signal is used to determine whether the puncture needle is approaching or moving away from the imaging plane, that is, the movement tendency of the puncture needle tip.

[0026] Specifically, the receiving ultrasonic transducer is arranged at the needle tip of the puncture needle.

[0027] The present invention also provides an ultrasonic puncture guidance method using the aforementioned ultrasonic puncture guidance system, comprising the steps of:

[0028] S1. The puncture needle performs puncture, and the ultrasonic diagnostic unit sends an ultrasonic diagnostic excitation signal to the ultrasonic diagnostic probe, and the ultrasonic diagnostic probe obtains a corresponding ultrasonic image accordingly;

[0029] S2, the signal receiving and processing unit receives the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit, and obtains the voltage amplitude signal and the signal delay accordingly;

[0030] S3, the signal receiving and processing unit determines whether the puncture needle is close to or away from the imaging plane according to the change in the voltage amplitude signal;

[0031] S4, the signal receiving processing unit calculates the distance between the needle tip of the puncture needle and the ultrasonic diagnostic probe according to the signal delay and the ultrasonic sound velocity in the human body;

[0032] S5, the signal receiving and processing unit determines the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe according to the voltage amplitude signal;

[0033] S6. The ultrasonic diagnostic unit obtains the position and movement tendency of the puncture needle tip according to S3-35, and presents it on the ultrasonic image to guide ultrasonic puncture.

[0034] Beneficial effect: The present invention obtains the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnostic excitation signal of the ultrasonic diagnostic unit. When the ultrasonic image does not show the puncture needle, the position and movement tendency of the puncture needle tip can be obtained. Based on this, the adverse effects of the puncture angle and puncture section of the puncture needle on ultrasound-guided puncture can be improved, the guidance effect of the puncture needle in the case of large angles and deviations of the section can be improved, the difficulty of operation for doctors can be reduced, the learning cost can be reduced, and the puncture efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are merely embodiments of the present invention, and ordinary technicians in this field can obtain other drawings based on these drawings without creative work.

[0036] Figure 1 is a schematic diagram of the ultrasonic puncture guidance system of the present invention;

[0037] Figure 2 The diagram is a schematic diagram of the structure of a puncture needle with a receiving ultrasonic transducer, wherein the left diagram is a schematic diagram of the overall structure of the puncture needle, and the right diagram is an enlarged diagram of the structure in the dotted box in the left diagram;

[0038] Figure 3 A schematic diagram for determining the relative position of the puncture needle and the imaging plane, wherein the dotted circle represents the outline of the needle tip of the puncture needle in the ultrasound image;

[0039] Figure 4 A schematic diagram to confirm the distance between the puncture needle tip and the ultrasound diagnostic probe;

[0040] Figure 5 A schematic diagram for confirming the relative direction between the puncture needle tip and the ultrasonic diagnostic probe, wherein each dotted line is an ultrasonic scanning line excited during line scanning, and the bold dotted line is an ultrasonic scanning line that is just pointing to the receiving ultrasonic transducer on the puncture needle.

[0041] In the figure, 1 is an ultrasonic diagnostic probe, 2 is a puncture needle, and 3 is a receiving ultrasonic transducer. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0043] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. "Include" or "comprising" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0044] The structure of the ultrasonic puncture guidance system of the present invention is as follows: Figure 1 As shown, including:

[0045] An ultrasonic diagnostic probe, which is disposed at the patient's affected part and is used to obtain a corresponding ultrasonic image according to an ultrasonic diagnostic excitation signal sent by an ultrasonic diagnostic unit connected thereto;

[0046] A puncture needle, on which a receiving type ultrasonic transducer is provided, for receiving the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, and transmitting it to a signal receiving unit connected thereto;

[0047] The signal receiving and processing unit is connected to the puncture needle and the ultrasonic diagnosis unit respectively, and is used to receive the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit, and obtain the voltage amplitude signal and signal delay based on the received ultrasonic transducer, so as to calculate the position and movement tendency of the puncture needle tip;

[0048] The ultrasonic diagnostic unit is used to send ultrasonic diagnostic excitation signals to the ultrasonic diagnostic probe and the signal receiving unit, and simultaneously obtain the ultrasonic image obtained by the ultrasonic diagnostic probe and the position and movement tendency of the puncture needle tip obtained by the signal receiving and processing unit, and present the position and movement tendency of the puncture needle tip on the ultrasonic image to guide the doctor to perform ultrasonic puncture operations.

[0049] In the present invention, Figure 2 As shown, the receiving ultrasonic transducer is arranged at the needle tip of the puncture needle so as to receive the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring the ultrasonic image.

[0050] In the present invention, the position of the puncture needle tip is determined by the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe, wherein the distance between the puncture needle tip and the ultrasonic diagnostic probe can be obtained by signal delay calculation, and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe can be determined by a voltage amplitude signal;

[0051] Specifically, the distance between the puncture needle tip and the ultrasonic diagnostic probe can be calculated based on the signal delay and the ultrasonic sound speed in the human body;

[0052] Specifically, the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe can be expressed as the relative direction between the puncture needle axis and the diagnostic ultrasonic probe axis, that is, the angle between the two; when the position of the puncture needle remains unchanged, when the diagnostic ultrasonic probe performs line scanning, when the scanning line closest to the receiving ultrasonic transducer on the puncture needle is excited, the voltage signal amplitude generated by the receiving ultrasonic transducer is the largest. At this time, the relative direction between the puncture needle axis and the diagnostic ultrasonic probe axis can be calculated based on the scanning line.

[0053] In the present invention, it is also possible to judge whether the puncture needle is approaching or moving away from the imaging plane, that is, the movement tendency of the puncture needle tip, by the change in the magnitude of the voltage amplitude signal.

[0054] Specifically, when the puncture needle is performing puncture, regardless of whether the puncture needle is displayed on the ultrasound image, the receiving ultrasonic transducer at the needle tip position always receives the ultrasonic signal and sends it to the signal receiving system. It is easy to know that under the same conditions, the closer the puncture needle is to the imaging plane of the diagnostic ultrasound probe, the stronger the ultrasonic signal received by the receiving ultrasonic transducer thereon, and the higher the voltage amplitude signal generated. Therefore, when the puncture needle is not displayed on the ultrasound image, it can be judged whether the puncture needle is close to or far away from the imaging plane based on the change in the size of the voltage amplitude signal received by the signal receiving processing unit.

[0055] Furthermore, according to the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe obtained above, when the puncture needle is not displayed on the ultrasonic image, the needle tip of the puncture needle can be presented as a contour of a set range in the ultrasonic image, such as Figure 3 As shown; in the present invention, the outline can be set to be circular.

[0056] Specifically, the position of the needle tip of the puncture needle can be obtained according to the distance between the needle tip of the puncture needle and the ultrasonic diagnostic probe and the relative position relationship between the needle tip of the puncture needle and the ultrasonic diagnostic probe obtained above, and the outline of the set range can be obtained with this position as the center. The set range is the set length range, which can be set according to actual needs. Of course, there may be a certain deviation between the needle tip position of the puncture needle and the receiving ultrasonic transducer, and the deviation can be obtained through the installation parameters of the receiving ultrasonic transducer on the puncture needle.

[0057] Furthermore, as the puncture needle is fine-tuned, when the ultrasound diagnostic unit presents the position and movement tendency of the puncture needle tip on the ultrasound image, when the voltage amplitude signal becomes smaller, the puncture needle tip is away from the imaging plane, and the outline size can be increased and its color can be marked as red; when the voltage amplitude signal becomes larger, the puncture needle tip is close to the imaging plane, and the outline size can be reduced and its color can be marked as blue; when the puncture needle is located in the imaging plane, the outline size is the smallest and its color is marked as green. Through this design, the position of the puncture needle tip can be directly observed through the ultrasound image.

[0058] In the present invention, the signal receiving and processing unit is connected to the ultrasonic diagnosis unit in real time, and can receive the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit in real time.

[0059] In the present invention, after receiving the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, the receiving ultrasonic transducer on the puncture needle converts it into an electrical signal and transmits it to the signal receiving unit. The signal receiving processing unit obtains the voltage amplitude signal therein and obtains the signal delay based on the time difference between the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnostic excitation signal of the ultrasonic diagnostic unit.

[0060] In the present invention, the ultrasonic diagnostic probe may be a conventional ultrasonic probe such as a convex array or a linear array.

[0061] The present invention also provides an ultrasonic puncture guidance method based on the above ultrasonic puncture guidance system, comprising the steps of:

[0062] S1. The aforementioned puncture needle performs puncture, and the ultrasonic diagnostic unit sends an ultrasonic diagnostic excitation signal to the ultrasonic diagnostic probe, and the ultrasonic diagnostic probe obtains a corresponding ultrasonic image accordingly;

[0063] S2, the signal receiving and processing unit receives the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit, and obtains the voltage amplitude signal and the signal delay accordingly;

[0064] S3, the signal receiving and processing unit determines whether the puncture needle is close to or away from the imaging plane according to the voltage amplitude signal;

[0065] S4, the signal receiving processing unit calculates the distance between the needle tip of the puncture needle and the ultrasonic diagnostic probe according to the signal delay and the ultrasonic sound velocity in the human body;

[0066] Specifically, Figure 4 As shown, the distance between the needle tip of the puncture needle and the ultrasonic diagnostic probe is L, the signal delay is Δt, and the ultrasonic speed in the human body is C, then L=C*Δt.

[0067] S5. The signal receiving and processing unit determines the relative positional relationship between the tip of the puncture needle and the ultrasonic diagnostic probe according to the voltage amplitude signal;

[0068] Specifically, when the position of the puncture needle remains unchanged and the diagnostic ultrasonic probe performs a linear scan, when the scan line closest to the receiving ultrasonic transducer on the puncture needle is excited, the voltage signal amplitude generated by the receiving ultrasonic transducer is the largest. At this time, the relative direction between the axial direction of the puncture needle and the axial direction of the diagnostic ultrasonic probe can be determined.

[0069] More specifically, in this embodiment, the diagnostic ultrasonic probe is a convex array. When the convex array probe performs a linear scan, N ultrasonic scan lines are sequentially excited, as Figure 5 shown. When the nth (n < N) scan line is excited and the voltage amplitude signal received by the receiving ultrasonic transducer on the puncture needle is the largest, the direction pointed to by this scan line is the tip of the puncture needle. Furthermore, the relative direction between the axial direction of the puncture needle and the axial direction of the diagnostic ultrasonic probe, that is, the relative positional relationship between the tip of the puncture needle and the ultrasonic diagnostic probe, can be obtained.

[0070] S6. The ultrasonic diagnostic unit obtains the position and movement tendency of the tip of the puncture needle according to S3-35 and presents them on the ultrasonic image to guide the doctor to perform ultrasonic puncture operations.

[0071] By obtaining the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnostic excitation signal of the ultrasonic diagnostic unit, when the puncture needle is not shown in the ultrasonic image, the position and movement tendency of the tip of the puncture needle can be obtained. Based on this, the adverse effects of the puncture angle and puncture section of the puncture needle on ultrasonic-guided puncture can be improved, the guiding effect in the case of large angles and off-section of the puncture needle can be improved, the operation difficulty of the doctor can be reduced, the learning cost can be reduced, and the puncture efficiency can be improved.

[0072] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of brevity.

[0073] The embodiments of the present invention are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the embodiments of the present invention shall be included within the protection scope of the present invention.

Claims

1. An ultrasonic puncture guidance system, characterized in that: include: An ultrasonic diagnostic probe, which is disposed at the patient's affected part and is used to obtain a corresponding ultrasonic image according to an ultrasonic diagnostic excitation signal sent by an ultrasonic diagnostic unit connected thereto; A puncture needle, on which a receiving type ultrasonic transducer is provided, for receiving the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, and transmitting it to a signal receiving unit connected thereto; The signal receiving and processing unit is connected to the puncture needle and the ultrasonic diagnosis unit respectively, and is used to receive the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit, and obtain the voltage amplitude signal and signal delay based on the received ultrasonic transducer, so as to obtain the position and movement tendency of the puncture needle tip; The ultrasonic diagnostic unit is used to send ultrasonic diagnostic excitation signals to the ultrasonic diagnostic probe and the signal receiving unit, and simultaneously obtain the ultrasonic image obtained by the ultrasonic diagnostic probe and the position and movement tendency of the puncture needle tip obtained by the signal receiving and processing unit, and present the position and movement tendency of the puncture needle tip on the ultrasonic image.

2. The ultrasonic puncture guidance system according to claim 1, characterized in that: The position of the puncture needle tip is determined by the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe, wherein the distance between the puncture needle tip and the ultrasonic diagnostic probe is obtained by signal delay calculation, and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe is determined by the voltage amplitude signal.

3. The ultrasonic puncture guidance system according to claim 2, characterized in that: The distance between the puncture needle tip and the ultrasonic diagnostic probe is calculated based on the signal delay and the ultrasonic sound velocity in the human body.

4. The ultrasonic puncture guidance system according to claim 2, characterized in that: The relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe is calculated as follows: When the diagnostic ultrasound probe performs line scanning, when the scanning line closest to the receiving ultrasound transducer on the puncture needle is excited, the voltage signal amplitude generated by the receiving ultrasound transducer is the largest. At this time, the relative direction between the axial direction of the puncture needle and the axial direction of the diagnostic ultrasound probe is calculated based on the scanning line.

5. The ultrasonic puncture guidance system according to claim 2, characterized in that: According to the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe, when the puncture needle is not displayed on the ultrasonic image, the needle tip portion of the puncture needle is presented as an outline of a set range in the ultrasonic image.

6. The ultrasonic puncture guidance system according to claim 5, characterized in that: The outline is presented as follows: The position of the puncture needle tip is obtained according to the distance between the puncture needle tip and the ultrasonic diagnostic probe and the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe, and the outline of the set range is determined with the position as the center.

7. The ultrasonic puncture guidance system according to claim 5, characterized in that: As the puncture needle is fine-tuned, the ultrasound diagnostic unit presents the position and movement tendency of the puncture needle tip on the ultrasound image: When the voltage amplitude signal becomes smaller, the outline size is increased and its color is marked as red; When the voltage amplitude signal becomes larger, the outline size is reduced and its color is marked as blue; When the puncture needle is located in the imaging plane, the outline size is the smallest and its color is marked as green.

8. The ultrasonic puncture guidance system according to claim 1, characterized in that: The movement tendency of the puncture needle tip is obtained as follows: The change in the magnitude of the voltage amplitude signal is used to determine whether the puncture needle is approaching or moving away from the imaging plane, that is, the movement tendency of the puncture needle tip.

9. The ultrasonic puncture guidance system according to claim 1, characterized in that: The receiving type ultrasonic transducer is arranged at the needle tip of the puncture needle.

10. An ultrasonic puncture guidance method using the ultrasonic puncture guidance system according to any one of claims 1 to 9, characterized in that: Includes steps: S1. The puncture needle performs puncture, and the ultrasonic diagnostic unit sends an ultrasonic diagnostic excitation signal to the ultrasonic diagnostic probe, and the ultrasonic diagnostic probe obtains a corresponding ultrasonic image accordingly; S2, the signal receiving and processing unit receives the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnosis excitation signal of the ultrasonic diagnosis unit, and obtains the voltage amplitude signal and the signal delay accordingly; S3, the signal receiving and processing unit determines whether the puncture needle is close to or away from the imaging plane according to the change in the voltage amplitude signal; S4, the signal receiving processing unit calculates the distance between the needle tip of the puncture needle and the ultrasonic diagnostic probe according to the signal delay and the ultrasonic sound velocity in the human body; S5, the signal receiving and processing unit determines the relative position relationship between the puncture needle tip and the ultrasonic diagnostic probe according to the voltage amplitude signal; S6. The ultrasonic diagnostic unit obtains the position and movement tendency of the puncture needle tip according to S3-35, and presents it on the ultrasonic image to guide ultrasonic puncture.

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