Ultrasonic puncture guiding system

Abstract

The utility model discloses an ultrasonic puncture guiding system, which comprises an ultrasonic diagnosis probe, an ultrasonic puncture guiding device and a control device, and is characterized in that the ultrasonic diagnosis probe is used for acquiring corresponding ultrasonic images according to ultrasonic diagnosis excitation signals; 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 utility model can solve the adverse effect of the puncture angle and the puncture tangent surface of the puncture needle on the ultrasonic guided puncture, improve the guide effect under the conditions of large angle and tangent surface deviation of the puncture needle, reduce the operation difficulty of doctors, reduce the learning cost and improve the puncture efficiency.

Description

Technical Field

[0001] This utility model relates to the field of ultrasonic puncture technology, and in particular to an ultrasonic puncture guidance system. Background Technology

[0002] Ultrasound-guided biopsy is a method of obtaining cellular and pathological diagnoses by puncturing living tissue under real-time monitoring and guidance of an ultrasound instrument. It began as early as the 1970s and has now become a very mature and important diagnostic technique. The ultrasound probe has a puncture groove in the center, through which the puncture needle performs the biopsy.

[0003] Although ultrasound-guided puncture has gradually become an indispensable clinical procedure, this technique still has many limitations. For example, in actual use, the visualization of the puncture needle is not good, and 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] Firstly, the angle has an effect. Since the surface of the puncture needle is smooth, it will produce specular reflection of the incident sound waves. The more tilted the puncture needle is, the less sound waves can return to the probe, and the less likely the puncture needle is to be visualized.

[0005] Secondly, the misalignment between the puncture needle and the ultrasound imaging plane has an impact. Ultrasound imaging produces a cross-sectional image. If the puncture needle is inserted into this cross-section, the puncture needle will be displayed better. However, in actual puncture, it is difficult for doctors to ensure this. Slightly moving the probe or rotating the puncture needle may cause it to deviate from the imaging plane, resulting in the puncture needle not being displayed or being displayed incompletely. In some cases, doctors may even deliberately insert the needle outside the imaging plane, making it even more difficult to display the position of the puncture needle. Summary of the Invention

[0006] Purpose of the invention: To address the above-mentioned shortcomings, this utility model proposes an ultrasonic puncture guidance system to solve the adverse effects of the puncture needle angle and puncture cut surface on ultrasonic guidance, improve the guidance effect when the puncture needle is at a large angle or the cut surface deviates, reduce the difficulty of operation for doctors, reduce the learning cost, and improve puncture efficiency.

[0007] Technical solution:

[0008] This utility model provides an ultrasonic puncture guidance system, comprising:

[0009] An ultrasound diagnostic probe is placed at the patient's affected area to acquire corresponding ultrasound images based on ultrasound diagnostic excitation signals sent by the ultrasound diagnostic unit connected to it.

[0010] The puncture needle is equipped with a receiving ultrasonic transducer, which is used to receive the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, and transmit it to the signal receiving unit connected to it.

[0011] The signal receiving and processing unit is connected to the puncture needle and the ultrasound diagnostic unit respectively. It is used to receive the ultrasound signal transmitted by the receiving ultrasound transducer on the puncture needle and the ultrasound diagnostic excitation signal of the ultrasound diagnostic unit, thereby obtaining the voltage amplitude signal and signal delay, and thus obtaining the position and movement tendency of the puncture needle tip.

[0012] The ultrasound diagnostic unit is used to send ultrasound diagnostic excitation signals to the ultrasound diagnostic probe and the signal receiving unit, and at the same time acquire the ultrasound image obtained by the ultrasound 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 ultrasound image.

[0013] Specifically, the position of the puncture needle tip is determined by the distance between the puncture needle tip and the ultrasound diagnostic probe and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe. The distance between the puncture needle tip and the ultrasound diagnostic probe is calculated by signal delay, and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe is determined by voltage amplitude signal.

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

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

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

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

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

[0019] The position of the puncture needle tip is obtained based on the distance between the puncture needle tip and the ultrasound diagnostic probe and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe. The outline of the set range is then determined with this position as the center.

[0020] Furthermore, as the puncture needle is finely adjusted, the ultrasound diagnostic unit displays the position and movement tendency of the puncture needle tip on the ultrasound image:

[0021] When the voltage amplitude signal decreases, increase the outline size and mark it in red.

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

[0023] When the puncture needle is located on the imaging plane, its outline size is at its smallest, and it is marked with green.

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

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

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

[0027] Beneficial effects: This invention obtains the position and movement tendency of the puncture needle tip by acquiring the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnostic excitation signal of the ultrasonic diagnostic unit, even when the puncture needle is not displayed in the ultrasound image. Based on this, it can improve the adverse effects of the puncture angle and puncture cut surface on the ultrasound-guided puncture, improve the guiding effect when the puncture needle is at a large angle or the cut surface is deviated, reduce the difficulty of operation for doctors, reduce the learning cost, and improve puncture efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in one or more embodiments or prior art of this specification, the accompanying drawings used in the description of one or more embodiments or prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the ultrasonic puncture guidance system of this utility model;

[0030] Figure 2 The diagram shows the structure of a puncture needle with a receiving ultrasonic transducer. The left diagram is a schematic diagram of the overall structure of the puncture needle, and the right diagram is an enlarged view of the structure within the dashed box in the left diagram.

[0031] Figure 3 A schematic diagram for determining the relative position of the puncture needle and the imaging plane, where the dashed circle represents the outline of the needle tip in the ultrasound image;

[0032] Figure 4 A schematic diagram to confirm the distance between the tip of the puncture needle and the ultrasound diagnostic probe;

[0033] Figure 5 This diagram illustrates the relative orientation between the needle tip and the ultrasound diagnostic probe. The dashed lines represent the ultrasound scan lines generated during linear scanning, while the thickened dashed lines point directly at the receiving ultrasound transducer on the needle.

[0034] In the diagram, 1 is an ultrasound diagnostic probe, 2 is a puncture needle, and 3 is a receiving ultrasound transducer. Detailed Implementation

[0035] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] The architecture of the ultrasonic puncture guidance system of this invention is as follows: Figure 1 As shown, it includes:

[0037] An ultrasound diagnostic probe is placed at the patient's affected area to acquire corresponding ultrasound images based on ultrasound diagnostic excitation signals sent by the ultrasound diagnostic unit connected to it.

[0038] The puncture needle is equipped with a receiving ultrasonic transducer, which is used to receive the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, and transmit it to the signal receiving unit connected to it.

[0039] The signal receiving and processing unit is connected to the puncture needle and the ultrasound diagnostic unit respectively. It is used to receive the ultrasound signal transmitted by the receiving ultrasound transducer on the puncture needle and the ultrasound diagnostic excitation signal of the ultrasound diagnostic unit. Based on this, the voltage amplitude signal and signal delay are obtained, so that the position and movement tendency of the puncture needle tip can be calculated.

[0040] The ultrasound diagnostic unit is used to send ultrasound diagnostic excitation signals to the ultrasound diagnostic probe and the signal receiving unit, and at the same time acquire the ultrasound image obtained by the ultrasound 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 ultrasound image to guide the doctor to perform ultrasound puncture operation.

[0041] In this utility model, such as Figure 2As shown, the receiving ultrasound transducer is positioned at the tip of the puncture needle to receive the ultrasound signal generated by the ultrasound diagnostic probe when acquiring ultrasound images.

[0042] In this invention, the position of the puncture needle tip is determined by the distance between the puncture needle tip and the ultrasound diagnostic probe and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe. The distance between the puncture needle tip and the ultrasound diagnostic probe can be calculated by signal delay, and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe can be determined by voltage amplitude signal.

[0043] Specifically, the distance between the tip of the puncture needle and the ultrasound diagnostic probe can be calculated based on the signal delay and the speed of ultrasound in the human body;

[0044] Specifically, the relative positional relationship between the tip of the puncture needle and the ultrasound diagnostic probe can be expressed as the relative direction between the axis of the puncture needle and the axis of the diagnostic ultrasound probe, i.e., the angle between them. When the position of the puncture needle remains unchanged, when the diagnostic ultrasound probe performs a linear scan, the voltage signal amplitude generated by the receiving ultrasound transducer is the largest when the scan line closest to the receiving ultrasound transducer on the puncture needle is excited. At this time, the relative direction between the axis of the puncture needle and the axis of the diagnostic ultrasound probe can be calculated based on the scan line.

[0045] In this invention, the magnitude change of the voltage amplitude signal can also be used to determine whether the puncture needle is approaching or moving away from the imaging plane, i.e., the movement tendency of the puncture needle tip.

[0046] Specifically, during puncture, regardless of whether the puncture needle is displayed on the ultrasound image, the receiving ultrasound transducer at the needle tip continuously receives ultrasound signals and transmits them to the signal receiving system. It is easy to see that, under the same conditions, the closer the puncture needle is to the imaging plane of the diagnostic ultrasound probe, the stronger the ultrasound signal received by the receiving ultrasound transducer on it, and the higher the voltage amplitude signal generated. Therefore, when the puncture needle is not displayed on the ultrasound image, the magnitude of the voltage amplitude signal received by the signal receiving and processing unit can be used to determine whether the puncture needle is approaching or moving away from the imaging plane.

[0047] Furthermore, based on the distance between the puncture needle tip and the ultrasound diagnostic probe, and the relative positional relationship between them, when the puncture needle is not displayed on the ultrasound image, the needle tip can be presented as a defined outline within a set range in the ultrasound image, such as... Figure 3 As shown; in this utility model, the outline can be set as a circle.

[0048] Specifically, the position of the puncture needle tip can be obtained based on the distance between the puncture needle tip and the ultrasound diagnostic probe, and their relative positional relationship. Using this position as the center, the outline of a set range can be obtained; this 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 puncture needle tip position and the receiving ultrasound transducer; this deviation can be obtained through the installation parameters of the receiving ultrasound transducer on the puncture needle.

[0049] Furthermore, as the puncture needle is fine-tuned, when the ultrasound diagnostic unit displays the position and movement tendency of the puncture needle tip on the ultrasound image, when the voltage amplitude signal decreases, the puncture needle tip is further away from the imaging plane, and the outline size can be increased, marked in red; when the voltage amplitude signal increases, the puncture needle tip is closer to the imaging plane, and the outline size can be decreased, marked in blue; when the puncture needle is located on the imaging plane, the outline size is at its smallest, marked in green. This design allows direct observation of the puncture needle tip position through the ultrasound image.

[0050] In this invention, the signal receiving and processing unit is connected to the ultrasound diagnostic unit in real time, and can receive the ultrasound diagnostic excitation signal from the ultrasound diagnostic unit in real time.

[0051] In this invention, the receiving ultrasonic transducer on the puncture needle receives the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, converts it into an electrical signal, and transmits it to the signal receiving unit. The signal receiving and processing unit acquires the voltage amplitude signal therein, and at the same time, 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.

[0052] In this invention, the ultrasound diagnostic probe can be a conventional ultrasound probe such as a convex array or a linear array.

[0053] This utility model also provides an ultrasonic puncture guidance method based on the above-mentioned ultrasonic puncture guidance system, comprising the following steps:

[0054] S1. The aforementioned puncture needle is used for puncture, and the ultrasound diagnostic unit sends an ultrasound diagnostic excitation signal to the ultrasound diagnostic probe, which then acquires the corresponding ultrasound image.

[0055] S2, the signal receiving and processing unit receives the ultrasonic signal transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnostic excitation signal of the ultrasonic diagnostic unit, and obtains the voltage amplitude signal and signal delay accordingly.

[0056] S3. The signal receiving and processing unit determines whether the puncture needle is approaching or moving away from the imaging plane based on the voltage amplitude signal.

[0057] S4. The signal receiving and processing unit calculates the distance between the tip of the puncture needle and the ultrasonic diagnostic probe based on the signal delay and the ultrasonic sound speed in the human body;

[0058] Specifically, as Figure 4 shown, the distance between the tip of the puncture needle and the ultrasonic diagnostic probe is L, the signal delay is Δt, and the ultrasonic sound speed in the human body is C, then L = C * Δt.

[0059] S5. The signal receiving and processing unit determines the relative positional relationship between the tip of the puncture needle and the ultrasonic diagnostic probe based on the voltage amplitude signal;

[0060] 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.

[0061] 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, the voltage amplitude signal received by the receiving ultrasonic transducer on the puncture needle is the largest. Then the direction pointed 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.

[0062] 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.

[0063] Through the ultrasonic signals transmitted by the receiving ultrasonic transducer on the puncture needle and the ultrasonic diagnostic excitation signals of the ultrasonic diagnostic unit obtained by the present utility model, when the puncture needle is not displayed on 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 - angle puncture needle and off - section can be enhanced, the operation difficulty of the doctor can be reduced, the learning cost can be lowered, and the puncture efficiency can be increased.

[0064] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0065] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An ultrasonic puncture guidance system, characterized in that, include: An ultrasound diagnostic probe is placed at the patient's affected area to acquire corresponding ultrasound images based on ultrasound diagnostic excitation signals sent by the ultrasound diagnostic unit connected to it. The puncture needle is equipped with a receiving ultrasonic transducer, which is used to receive the ultrasonic signal excited by the ultrasonic diagnostic probe when acquiring an ultrasonic image, and transmit it to the signal receiving unit connected to it. The signal receiving and processing unit is connected to the puncture needle and the ultrasound diagnostic unit respectively. It is used to receive the ultrasound signal transmitted by the receiving ultrasound transducer on the puncture needle and the ultrasound diagnostic excitation signal of the ultrasound diagnostic unit, thereby obtaining the voltage amplitude signal and signal delay, and thus obtaining the position and movement tendency of the puncture needle tip. The ultrasound diagnostic unit is used to send ultrasound diagnostic excitation signals to the ultrasound diagnostic probe and the signal receiving unit, and at the same time acquire the ultrasound image obtained by the ultrasound 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 ultrasound 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 ultrasound diagnostic probe and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe. The distance between the puncture needle tip and the ultrasound diagnostic probe is calculated by signal delay, and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe is determined by voltage amplitude signal.

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

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

5. The ultrasonic puncture guidance system according to claim 2, characterized in that, Based on the distance between the tip of the puncture needle and the ultrasound diagnostic probe and the relative positional relationship between the tip of the puncture needle and the ultrasound diagnostic probe, when the puncture needle is not displayed on the ultrasound image, the tip portion of the puncture needle is presented as a contour within a set range in the ultrasound 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 based on the distance between the puncture needle tip and the ultrasound diagnostic probe and the relative positional relationship between the puncture needle tip and the ultrasound diagnostic probe. The outline of the set range is then determined with this position as the center.

7. The ultrasonic puncture guidance system according to claim 5, characterized in that, As the puncture needle is finely adjusted, the ultrasound diagnostic unit displays the position and movement tendency of the puncture needle tip on the ultrasound image: When the voltage amplitude signal decreases, increase the outline size and mark it in red. When the voltage amplitude signal increases, the outline size is reduced and its color is marked as blue; When the puncture needle is located on the imaging plane, its outline size is at its smallest, and it is marked with 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 magnitude change of the voltage amplitude signal is used to determine whether the puncture needle is approaching or moving away from the imaging plane, i.e., the movement tendency of the puncture needle tip.

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

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