Focal region temperature measuring device of focused ultrasonic transducer

Abstract

The utility model discloses a focal region temperature measuring device of a focused ultrasonic transducer, which comprises a fixed support fixedly connected with a transducer to be measured; the guide structure is rotationally matched with the fixed bracket, so that the guide direction of the guide structure penetrates through the focal region of the transducer to be detected; the guide piece is matched with the linear motion of the guide structure, so that the temperature measuring element at the tail end of the guide piece is arranged at the focal region position on the target object; and the temperature measuring module is electrically connected with the temperature measuring element so as to detect the focal region temperature of the transducer to be measured. By adjusting the steering angle and the extension length of the guide piece, the temperature measuring element can be accurately arranged at the focal region position of a target object, so that the focal region temperature change of the ultrasonic transducer is detected in real time, imaging ultrasonic guide is not needed, meanwhile, the device can be suitable for ultrasonic transducers with different focal lengths, the detection cost is effectively reduced, and the detection efficiency is improved. The device has the advantages of being simple in structure, low in cost, convenient to operate and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of ultrasonic transducer testing, and in particular relates to a focal zone temperature measuring device of a focused ultrasonic transducer. Background Art

[0002] Ultrasound focusing is a treatment method that uses the sound radiation of ultrasound to converge and focus to form a high-temperature treatment point. The area where the sound radiation is focused is the focal zone (focus). By setting different ultrasonic emission energies, focal zone heat generation (thermal effect), focal zone cavitation (cavitation effect), and focal zone mechanical force generation (mechanical effect) can be achieved. Among them, the thermal effect of the focal zone is usually used in treatment fields such as tissue ablation.

[0003] The convergence and focusing of acoustic radiation needs to be achieved through a focused ultrasound transducer. The intensity of its thermal effect (focal temperature) is directly related to clinical safety and effectiveness. If the focal temperature is too low, the treatment will be incomplete. If the focal temperature is too high, it will affect non-treatment areas and cause unnecessary tissue damage. Therefore, it is crucial to detect the focal temperature of the focused ultrasound transducer. At present, the detection of focal temperature is generally achieved through thermocouples. The thermocouple needs to be placed in the target object through tools such as catheters, and the thermocouple is guided to the focal position through imaging ultrasound. Focused ultrasound is then emitted and the focal temperature is detected. However, this measurement method requires the guidance of imaging ultrasound, which makes the preparation work more complicated and the cost higher. On the other hand, the positioning error of the thermocouple is large, which can easily lead to inaccurate temperature measurement. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the problems existing in the prior art, the utility model provides a focal area temperature measurement device of a focused ultrasonic transducer, which can accurately place the temperature measuring element at the focal area position on the target object, thereby detecting the focal area temperature change, without the need for imaging ultrasonic guidance, and can adapt to ultrasonic transducers with different focal lengths, effectively reducing detection costs and improving detection accuracy.

[0005] Summary of the invention: To achieve the above objectives, the present invention provides a focal-area temperature measurement device for a focused ultrasonic transducer, comprising:

[0006] A fixed bracket, fixedly connected to the transducer to be tested;

[0007] The guide structure is configured to rotate with the fixed bracket to ensure that the guide direction passes through the focal area of the transducer to be tested;

[0008] The guide member cooperates with the linear motion of the guide structure to place the temperature measuring element at its end at the focal position on the target object;

[0009] The temperature measurement module is electrically connected to the temperature measurement element to detect the focal temperature of the transducer to be measured.

[0010] Specifically, the guide structure is rotationally matched with the fixed bracket through a connecting piece, and is then locked and fixed with the fixed bracket through a locking piece.

[0011] Specifically, the guide structure is a disc structure, the guide direction of which extends radially, and a scale is provided on the disc structure for indicating the angular change of the guide direction.

[0012] Specifically, the guide is a hollow needle, and the temperature measuring element is inserted into the hollow needle and extends to the end of the hollow needle.

[0013] Specifically, the guide member is inserted into the guide structure and is locked and fixed to the guide structure by a fastener.

[0014] Specifically, a scale bar is provided on the guide member for indicating the linear extension length of the guide member.

[0015] Specifically, the focal area temperature measurement device further includes:

[0016] An accommodating structure for accommodating an ultrasonic transmission medium of a set volume;

[0017] A test bench, which is disposed in the containing structure and is used to place the target object;

[0018] The transducer bracket is used to install and adjust the transducer to be tested so that the ultrasound can be focused on the target object in the ultrasound transmission medium.

[0019] Specifically, the transducer support includes a lifting mechanism for achieving lifting and lowering adjustment of the transducer to be tested so as to achieve focusing of its ultrasound on a target object below.

[0020] Furthermore, a mounting structure is provided at the end of the lifting mechanism for achieving detachable connection of the transducer to be tested.

[0021] Specifically, the fixing bracket is fixedly connected to the transducer to be tested via a transducer bracket.

[0022] Beneficial effects:

[0023] The utility model realizes the angle adjustment of the guide member through the guide structure that rotates with the fixed bracket, thereby ensuring that its extension direction can pass through the focal area of the transducer to be tested, and then the temperature measuring element is accurately placed in the focal area position on the target object through the linear extension of the guide member, thereby detecting the focal area temperature change of the ultrasonic transducer in real time without the need for imaging ultrasonic guidance, and is applicable to ultrasonic transducers with different focal lengths, effectively reducing the detection cost and improving the detection accuracy. It has the characteristics of simple structure, low cost, easy operation, etc., and is convenient for on-site detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a detection principle diagram of the focal area temperature measurement device in an embodiment of the present utility model;

[0025] Figure 2 This is a schematic structural diagram of a focal area temperature measurement device in an embodiment of the present utility model;

[0026] The figure includes: 1-fixed bracket, 2-guide structure, 3-guide, 4-temperature measuring element, 5-temperature measuring module, 6-transducer to be tested, 61-focal area, 7-test bench, 8-accommodating structure, 9-transducer bracket. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0028] Reference Figure 1 、 Figure 2 This embodiment provides a focal area temperature measurement device for a focused ultrasonic transducer, which mainly includes:

[0029] A fixed bracket 1 is fixedly connected to the transducer 6 to be tested;

[0030] The guide structure 2 is configured to rotate with the fixed support 1 so as to guide the structure 2 in a direction that passes through the focal region 61 of the transducer 6 to be tested.

[0031] The guide member 3 cooperates with the guide structure 2 in linear motion to place the temperature measuring element 4 at its end at the focal region 61 on the target object;

[0032] The temperature measuring module 5 is electrically connected to the temperature measuring element 4 to detect the temperature of the focal region 61 of the transducer 6 to be measured.

[0033] Among them, due to the effect of the fixed bracket 1, the relative position of the rotation center O of the guide structure 2 and the arc surface center P of the transducer to be tested 6 is fixed. Then, taking the direction of the line connecting the arc surface center P of the transducer to be tested 6 and the focal area center Q as the vertical direction, the horizontal distance a and the height difference b between points O and P are both known. Therefore, according to the focal length h of the transducer to be tested 6, the angle α between the guide direction and the horizontal direction and the length m of the line segment OQ can be obtained, where tanα=(b+h) / a,m 2 =a 2 +(b+h) 2Therefore, by adjusting the rotation angle of the guide structure 2 and the extension length of the guide 3, it is possible to ensure that the temperature measuring element 4 at the end is located in the focal region 61 on the target object. Preferably, the fixed bracket 1 is a horizontal bracket perpendicular to the PQ line to facilitate observation of the angular changes of the guide structure 2; the rotation center point O of the guide structure 2 and the arc center point P of the transducer 6 to be measured can be at the same height, that is, b = 0, to facilitate parameter adjustment.

[0034] Specifically, the guide structure 2 is rotatably coupled to the fixed bracket 1 via a connector, and is then locked and fixed to the fixed bracket 1 via a locking member, so as to facilitate adjustment of the angle of the guide direction. For example, the guide structure 2 is a disc structure, the center of which is rotatably coupled to the fixed bracket 1 via a rotating shaft, and the disc structure is threadedly locked via a locking member that is threadedly connected to the rotating shaft. Furthermore, the guide direction of the disc structure extends radially, and a graduated dial is provided on the disc structure to obtain the angular change between the guide direction and the horizontal direction. In addition, the rotational coupling between the guide structure 2 and the fixed bracket 1 can also be achieved through other structures, such as a stepping motor.

[0035] Specifically, the temperature measuring element 4 can adopt a micro sensor such as a thermocouple. This type of sensor is often fragile, so the guide 3 is preferably designed as a hollow needle, so that the temperature measuring element 4 is inserted into the hollow needle and extended to the end of the hollow needle to achieve precise placement and puncture protection of the temperature measuring element 4; the temperature measuring module 5 adopts a matching temperature measuring device, which is electrically connected to the temperature measuring element 4 through a connecting wire.

[0036] Specifically, the guide member 3 is inserted into the guide structure 2 and is locked and fixed to the guide structure 2 by fasteners. For example, the hollow needle is inserted into the needle track on the disc structure, and the disc structure is provided with a fastening bolt extending axially into the needle track, thereby locking and fixing the hollow needle. Furthermore, the linear motion coordination of the guide member 3 and the guide structure 2 can also be achieved through other means, such as slide rail coordination, thread coordination, etc. Furthermore, a scale bar is provided on the guide member 3, thereby obtaining the extension length of the guide member 3 along the needle track.

[0037] Reference Figure 2 , the focal area temperature measurement device also includes:

[0038] The accommodating structure 8 is used to accommodate a set volume of ultrasound transmission medium;

[0039] A test bench 7 is disposed in the accommodating structure 8 and is used to accommodate the target object;

[0040] The transducer bracket 9 is used to install and adjust the transducer 6 to be tested so as to achieve ultrasound focusing on the target object in the ultrasound transmission medium.

[0041] Among them, the ultrasonic transmission medium can be degassed water or ultrasonic gel, etc. In this embodiment, degassed water is used to fill the containing structure 8, so that the transducer and the target object in the test state are both located in the degassed water to simulate the real clinical scene; the target object can be an in vitro tissue or a phantom structure, thereby detecting the focal temperature changes under different forms.

[0042] Specifically, the container structure 8 comprises a transparent container with an open top, thereby enabling the replacement of the target object and adjustment of the transducer 6 under test. Furthermore, the transparent container can be controlled by water inlet and outlet pipes, while also maintaining a constant temperature via a temperature control device. Furthermore, the test bench 7 utilizes a transparent tank with an open top to facilitate observation of the test process. For example, both the transparent container and the tank are made of transparent PMMA.

[0043] Specifically, the transducer bracket 9 includes a lifting mechanism for realizing the lifting and lowering adjustment of the transducer to be measured 6, so as to realize its ultrasonic focusing on the target object below. For example, the lifting mechanism can adopt a linear mechanism such as a lifting slide to realize the lifting and lowering adjustment, and at the same time, a quick-release structure is provided at the end of the transducer bracket 9 to realize the rapid loading and unloading of the transducer to be measured 6. Furthermore, the fixed bracket 1 is fixedly connected to the transducer to be measured 6 through the transducer bracket 9 to avoid the loading and unloading and replacement of the transducer affecting the stability of the fixed bracket 1. In addition, the transducer bracket 9 can also adopt a motion mechanism such as a motion platform or a robotic arm to realize multi-directional movement control, thereby accurately adjusting the positional relationship between the transducer to be measured 6 and the target object, ensuring that the focal area 61 is located on the target object, and effectively ensuring the measurement accuracy.

[0044] The specific implementation of this embodiment is as follows:

[0045] (1) Test preparation:

[0046] Fill the container 8 with degassed water and maintain the water temperature at about 37°C to simulate the human body environment;

[0047] (2) Place the target object:

[0048] Placing the target object, i.e., the ex vivo tissue, on the test platform 7 so that it remains in the center area of the platform;

[0049] (3) Install and adjust the transducer 6 to be tested:

[0050] The transducer 6 to be tested is mounted on the transducer holder 9, and the height of the transducer 6 to be tested is adjusted by the transducer holder 9 so that its theoretical focal area is located on the isolated tissue below;

[0051] (4) Place the temperature measuring element 4:

[0052] By adjusting the rotation angle of the guide structure 2 so that its guiding direction passes through the focal region 61 of the transducer 6 to be measured, the guide member 3 is then inserted into the guide structure 2 and the extension length of the guide member 3 is adjusted to achieve placement of the temperature measuring element 4 at the focal region 61 on the ex vivo tissue.

[0053] (5) Implement ultrasonic emission and detect focal temperature changes:

[0054] The transducer under test 6 is controlled to emit focused ultrasound of a set intensity, and the temperature measurement module 5 electrically connected to the temperature measuring element 4 then monitors the temperature changes in the focal region 61 in real time. Alternatively, ex vivo tissue can be removed and axially sectioned to assess tissue degeneration. If a series of ultrasound transmissions is required, the target object is replaced and the temperature measuring element 4 is repositioned, and the transducer under test 6 is controlled to emit focused ultrasound at varying intensities. This process is repeated until the test is complete.

[0055] The above specific embodiments merely describe preferred embodiments of the present invention and do not limit the scope of protection of the present invention. Without departing from the design concept and spirit of the present invention, any modifications, substitutions, and improvements made by a person skilled in the art to the technical solution of the present invention based on the text description and drawings provided herein shall fall within the scope of protection of the present invention.

Claims

1. A focal temperature measurement device for a focused ultrasonic transducer, characterized in that: include: A fixed bracket, fixedly connected to the transducer to be tested; The guide structure is configured to rotate with the fixed bracket to ensure that the guide direction passes through the focal area of the transducer to be tested; The guide member cooperates with the linear motion of the guide structure to place the temperature measuring element at its end at the focal position on the target object; The temperature measurement module is electrically connected to the temperature measurement element to detect the focal temperature of the transducer to be measured.

2. The focal area temperature measurement device according to claim 1, characterized in that: The guide structure is rotationally matched with the fixed bracket through a connecting piece, and is then locked and fixed with the fixed bracket through a locking piece.

3. The focal area temperature measurement device according to claim 1, characterized in that: The guide structure is a disc structure, and its guide direction extends radially. A scale is provided on the disc structure for indicating the angular change of the guide direction.

4. The focal area temperature measurement device according to claim 1, characterized in that: The guide is a hollow needle, and the temperature measuring element is inserted into the hollow needle and extended to the end of the hollow needle.

5. The focal area temperature measurement device according to claim 1, characterized in that: The guide piece is inserted into the guide structure and is locked and fixed to the guide structure by a fastener.

6. The focal area temperature measurement device according to claim 1, characterized in that: The guide piece is provided with a scale bar for indicating the linear extension length of the guide piece.

7. The focal area temperature measurement device according to claim 1, characterized in that: Also includes: An accommodating structure for accommodating an ultrasonic transmission medium of a set volume; A test bench, which is disposed in the containing structure and is used to place the target object; The transducer bracket is used to install and adjust the transducer to be tested so that the ultrasound can be focused on the target object in the ultrasound transmission medium.

8. The focal area temperature measurement device according to claim 7, characterized in that: The transducer support includes a lifting mechanism for achieving lifting and lowering adjustment of the transducer to be tested so as to achieve focusing of its ultrasound on a target object below.

9. The focal area temperature measurement device according to claim 8, characterized in that: A mounting structure is provided at the end of the lifting mechanism for realizing a detachable connection of the transducer to be tested.

10. The focal area temperature measurement device according to claim 7, characterized in that: The fixing bracket is fixedly connected to the transducer to be tested through the transducer bracket.

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