Ultrasonic spherical surface scanning three-dimensional body treatment device and use method thereof

Abstract

The present invention relates to an ultrasonic spherical curved surface scanning three-dimensional body treatment device, which has an ultrasonic focusing transducer; the center hole of the ultrasonic focusing transducer is installed with a positioning probe lifting device and a positioning probe rotating device; the characteristics are: the upper end of the ultrasonic focusing transducer is sequentially connected in series with a swing mechanism, a rotating mechanism and a lifting mechanism; the lower end of the swing mechanism is hinged with the ultrasonic focusing transducer through a swing rotating shaft, and its upper end is fixedly connected to the rotating disk of the rotating mechanism; the rotating mechanism is connected to the movable end of the lifting mechanism; the ultrasonic focusing transducer, the swing mechanism, the rotating mechanism, the lifting mechanism, the positioning probe lifting device, the positioning probe rotating device and a water tank water bag for holding coupling water form a HIFU treatment head. The ultrasonic spherical curved surface scanning three-dimensional body treatment mechanical structure adopted by the present invention has a small diameter and light weight of the treatment head, and does not need to be moved during treatment, overcomes the defects of the existing mechanical structure, and completes the requirements of arbitrary-shaped three-dimensional scanning body thermal ablation treatment within the treatment range.

Description

Technical Field

[0001] The present invention relates to an ultrasonic treatment device, in particular to an ultrasonic spherical surface scanning three-dimensional body treatment device and a use method thereof, belonging to the technical field of medical equipment. Background Art

[0002] High-intensity focused ultrasound (HIFU) is a new non-invasive treatment method with the advantages of no incision, no infection, short recovery period and good efficacy. Since 1942, when Lynn et al. first reported HIFU treatment, many HIFU products have been registered as medical devices and applied in clinical practice at home and abroad. The principle of HIFU is to use the low-megahertz frequency band with beam radiation and good penetration in human tissue, and form an energy-intensive three-dimensional area - the focal area - in the medium around the focus through convergence technology. When the propagation medium is human tissue, the tissue in the focal area absorbs ultrasonic energy and converts it into heat energy to increase its own temperature. When the sound intensity in the focal area reaches hundreds of thousands per square centimeter, the temperature will rise to 56-100℃ in an instant, resulting in protein denaturation and cell coagulative necrosis, i.e. ablation; due to the steep edge of the focal area, the sound intensity and temperature of the tissue outside the focal area are much lower than those inside, and it can still be in a safe state. Since the size of the ultrasound focusing focal area is much smaller than the size of the tumor to be treated, and the shape of the tumor does not match the shape of the focal area, HIFU requires thermal ablation treatment of solid tumors by three-dimensional scanning of points, lines and surfaces. Among the three-dimensional scanning methods, the most common, reliable and convenient one is to use a three-dimensional mechanical transmission motion structure.

[0003] At present, there are two ways for HIFU products to use three-dimensional mechanical transmission motion structures:

[0004] 1. The treatment focused ultrasound transducer has functions such as depth adjustment and rotation of the positioning device, and forms an independent treatment head with the human body coupling water bag (or water tank). Under the action of another set of two-dimensional mechanical motion structures, the target in the human body and the treatment head move relative to each other, and three-dimensional scanning body scanning treatment is performed. The advantages are: the diameter of the treatment head is basically equal to the diameter of the radiation surface of the ultrasound focusing transducer (1), so that the diameter of the treatment head is small, which is convenient for treatment positioning; the disadvantages are also very obvious. The main reason is that during the treatment process, the contact surface between the treatment head coupling water bag and the human body is displaced, which will cause the internal organs of the human body to move, and it is possible that normal internal organs move into the ultrasound propagation path, hindering the propagation of focused ultrasound waves and affecting the treatment effect, or directly damaging the normal internal organs that move into the ultrasound propagation path; the treatment head coupling water bag has a certain pressure in contact with the human body, and the displacement of the two will force the movement of the target tissue in the body, and it is impossible to accurately execute the three-dimensional scanning body scanning thermal ablation treatment plan. This structure will affect the safety of HIFU treatment. In addition, when HIFU treatment requires a change in the incident angle of focused ultrasound, that is, the two-dimensional motion plane of the focused ultrasound transducer is not parallel to the contact surface of the human body, it may cause a limitation in the range of the treatment plane and hinder the normal HIFU treatment process. If the therapeutic focused ultrasound transducer is coupled with a water tank, the human body needs to lie in the water tank for treatment, and the treatment head does not produce pressure on the body. However, when treating the abdominal organs in a lying position, the intestines will slide down vertically and enter the ultrasound propagation path, seriously affecting the safety of the treatment. It is necessary to add another water bag to squeeze the intestines out of the ultrasound propagation path. Squeezing still produces the same defects as mentioned above;

[0005] 2. The functions of the three-dimensional movement of the focused ultrasonic transducer for treatment and the rotation of the positioning device are integrated with the human body coupling water bag (or water tank) to form an independent treatment head. The focused ultrasonic transducer completes the three-dimensional movement relative to the target in the human body in the treatment head to perform three-dimensional scanning body scanning treatment. The advantages are: the treatment head coupling water bag contacts the human body pressure, the treatment head does not need to move during the treatment, the position of the internal organs of the human body is fixed, and the treatment is safe. The disadvantage is that the focused ultrasonic transducer moves three-dimensionally in the treatment head, and the weight of the mechanical structure increases with the increase in the movement dimension; the diameter of the treatment head needs to increase the movement distance, and the outer diameter of the treatment head increases. At the same time, the amount of water used for coupling increases exponentially, requiring the mechanical size and scale of the product to increase. In addition, the larger the diameter and heavier the weight of the treatment head, the greater the application range of HIFU treatment. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide an ultrasonic spherical surface scanning three-dimensional body treatment device and its use method which has a small diameter and light weight treatment head and does not need to be moved during treatment, overcomes the defects of the existing mechanism, and completes the requirements of arbitrary-shaped three-dimensional scanning body thermal ablation treatment within the treatment range.

[0007] The technical solution for achieving the purpose of the present invention is: an ultrasonic spherical surface scanning three-dimensional body treatment device, comprising an ultrasonic focusing transducer; a positioning probe lifting device and a positioning probe rotating device are installed in the central hole of the ultrasonic focusing transducer; the characteristic is that: the upper end of the ultrasonic focusing transducer is sequentially connected in series with a swing mechanism, a rotating mechanism and a lifting mechanism; the lower end of the swing mechanism is hinged to the ultrasonic focusing transducer through a swing rotating shaft, and the upper end thereof is fixedly connected to the rotating disk of the rotating mechanism; the rotating mechanism is connected to the movable end of the lifting mechanism; the ultrasonic focusing transducer, the swing mechanism, the rotating mechanism, the lifting mechanism, the positioning probe lifting device, the positioning probe rotating device and a water tank water bag for containing coupling water constitute a HIFU treatment head.

[0008] A method for using an ultrasonic spherical curved surface scanning three-dimensional body treatment device, wherein the HIFU treatment head can form an ablation body of any shape in a three-dimensional curved surface cylinder by controlling a swing angle α of a mechanism, a rotation angle β of a rotation mechanism, and a moving position Z parameter of a lifting mechanism.

[0009] The swing mechanism described in the above technical solution causes the ultrasonic focusing transducer to tilt at an angle α with the swing mechanism's rotation axis as the center. When in use, the ultrasonic focusing transducer produces an ablation lesion in the tissue at the focal position of its acoustic axis; if the swing mechanism changes the tilt angle α, the ultrasonic focusing transducer will form another ablation lesion on a curve with a vertical distance from the center of the swing mechanism's rotation axis to the focal position of its acoustic axis as the curve radius R; the tilt angle α is changed continuously and orderly, and when in use, an ablation lesion curve will be produced in the tissue on the curve.

[0010] In the above technical solution, after the tissue ablation curve is formed, the movement position Z of the lifting mechanism is changed, and the above ablation focus curve is treated to form another ablation focus curve; the movement position Z of the lifting mechanism is continuously changed, and the HIFU tissue ablation curve is continued to be used, and a HIFU ablation surface will be formed. The height of the ablation surface is controlled by the movement stroke Z of the lifting mechanism, and the width is controlled by the swing angle α of the swing mechanism and the curve radius R.

[0011] The rotating mechanism described in the above technical solution changes the rotation angle β, which will form another ablation focus at the position of a circular ring with the focus position of the inclination angle 0 as the center and the radius r as the product of the curve radius R and the sine of the inclination angle α; the rotation angle β is continuously and orderly changed to 0-360°. When used, an ablation focus ring will be generated in the tissue on the circular ring.

[0012] In the above technical solution, after the tissue ablation ring is formed, the central inclination angle α of the swing mechanism is changed, and then the above ablation focus ring is treated to form another ablation focus ring; the swing angle α of the swing mechanism is continuously changed, and the HIFU tissue ablation focus ring is continued to be used, which will form a HIFU ablation focus curved surface or a curved surface with a central hole; the maximum diameter of the ablation focus curved surface is equal to the product of the curve radius R and the sine of the maximum inclination angle α.

[0013] The movement position Z of the lifting mechanism described in the above technical solution is changed to form another HIFU ablation focus curved surface; the movement position Z of the lifting mechanism is changed continuously and orderly, and the HIFU tissue ablation curved surface is continued to be used to form a HIFU three-dimensional curved cylindrical ablation body; the maximum height of the three-dimensional curved cylindrical ablation body is the maximum movement stroke of the lifting mechanism Z, and the maximum diameter of the curved surface is equal to the product of the curve radius R and the sine of the maximum inclination angle α.

[0014] After adopting the above technical solution, the present invention has the following positive effects:

[0015] (1) The outer diameter of the HIFU treatment head of the present invention is still basically equal to the diameter of the radiation surface of the focusing transducer, and only the size caused by the tilt of the focusing transducer is increased; the structure only adds a swing structure, and the water tank capacity does not change much, so the weight of the treatment head does not increase much.

[0016] (2) The treatment head of the present invention has a small diameter and a light weight, and has low requirements on the mechanical structure of the product. It does not require the product to add another set of two-dimensional mechanical motion structures to enable relative movement between the target in the human body and the treatment head.

[0017] (3) The treatment head of the present invention has a small outer diameter, is easy to position for treatment, and has a wide range of HIFU treatment applications

[0018] (4) The ultrasonic spherical surface scanning three-dimensional body treatment mechanism in the treatment head of the present invention can complete the three-dimensional scanning body thermal ablation treatment of any shape within the treatment range. During the treatment process, the treatment head does not need to move relative to the human body surface, and the treatment is safe.

[0019] (5) The treatment head of the present invention is coupled with the water bag to exert a certain pressure when in contact with the human body, thereby fixing the position of the internal organs of the human body and facilitating the accurate execution of the three-dimensional scanning volume scanning thermal ablation treatment planning.

[0020] (6) The change of the incident angle of the focused ultrasound of the treatment head of the present invention does not affect the completion of the three-dimensional scanning thermal ablation treatment of any shape within the treatment range by the ultrasonic spherical surface scanning three-dimensional body treatment mechanical structure of the treatment head. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments and in conjunction with the accompanying drawings, wherein

[0022] Figure 1 This is a schematic diagram of forming an ablation lesion curve according to Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of forming an ablation lesion ring according to Embodiment 2 of the present invention;

[0024] Figure 3 A schematic diagram of forming an ablation lesion curved surface according to Embodiment 4 of the present invention;

[0025] Figure 4 A schematic diagram of forming a curved cylinder for ablation lesions according to Embodiment 5 of the present invention;

[0026] The reference numerals in the accompanying drawings are: ultrasonic focusing transducer 1 , rocking mechanism 2 , rotating mechanism 3 , lifting mechanism 4 , rocking rotating shaft 5 . DETAILED DESCRIPTION

[0027] See Figure 1 The present invention comprises an ultrasonic focusing transducer 1; a positioning probe lifting device and a positioning probe rotating device are installed in the central hole of the ultrasonic focusing transducer 1; a swing mechanism 2, a rotating mechanism 3 and a lifting mechanism 4 are sequentially connected in series at the upper end of the ultrasonic focusing transducer 1; the lower end of the swing mechanism 2 is hinged to the ultrasonic focusing transducer 1 through a swing rotating shaft 5, and the upper end thereof is fixedly connected to the rotating disk of the rotating mechanism 3; the rotating mechanism 3 is connected to the movable end of the lifting mechanism 4; the ultrasonic focusing transducer 1, the swing mechanism 2, the rotating mechanism 3, the lifting mechanism 4, the positioning probe lifting device, the positioning probe rotating device and a water tank water bag for containing coupling water constitute a HIFU treatment head.

[0028] (Example 1)

[0029] See Figure 1 A method for using an ultrasonic spherical curved surface scanning three-dimensional body treatment device, wherein the HIFU treatment head can form an ablation body of any shape in a three-dimensional curved surface cylinder by controlling the swing angle α of the mechanism, the rotation angle β of the rotation mechanism, and the moving position Z parameter of the lifting mechanism.

[0030] The rotation angle β of the rotating mechanism 3 remains unchanged, and the swing mechanism 2 makes the ultrasonic focusing transducer 1 tilt at an angle α with the rotation axis of the swing mechanism 2 as the center. When in use, the ultrasonic focusing transducer 1 produces an ablation focus in the tissue at the focal position of its acoustic axis; if the swing mechanism 2 changes the tilt angle α, the ultrasonic focusing transducer 1 will form another ablation focus on a curve position with a curve radius R that is a vertical distance from the center of the rotation axis of the swing mechanism 2 to the focal position of its acoustic axis; by continuously and orderly changing the tilt angle α, the ultrasonic focusing transducer 1 will form an ablation focus curve 6 on a curve position with a curve radius R that is a vertical distance from the center of the rotation axis of the swing mechanism 2 to the focal position of its acoustic axis.

[0031] (Example 2)

[0032] The swing mechanism 3 tilts the focusing transducer at an angle α with the swing mechanism rotation axis as the center. The rotating mechanism 3 changes the rotation angle β, and another ablation focus will be formed at a circular ring position with the focus position of the tilt angle 0 as the center and the radius r being the product of the curve radius R and the sine of the tilt angle α; the rotation angle β is continuously and orderly changed to about 0-360°. When in use, an ablation focus ring 7 will be generated on the tissue on the ring.

[0033] (Example 3)

[0034] On the basis of Example 2, after the tissue ablation ring is formed, the central inclination angle α of the swing mechanism 2 is changed, and the above-mentioned ablation focus ring treatment is performed to form another ablation focus ring; the swing angle α of the swing mechanism 2 is continuously changed, and the HIFU tissue ablation focus ring is continued to be used, which will form a HIFU ablation focus curved surface or a curved surface with a central hole; the maximum diameter of the ablation focus curved surface is equal to the product of the curve radius R and the sine of the maximum inclination angle α.

[0035] (Example 4)

[0036] On the basis of Example 1, after the tissue ablation curve is formed, the movement position Z of the lifting mechanism 4 is changed, and the above-mentioned ablation focus curve is treated to form another ablation focus curve; the movement position Z of the lifting mechanism 4 is continuously changed, and the HIFU tissue ablation curve is continued to be used, and a HIFU ablation surface 8 will be formed. The height of the ablation surface is controlled by the movement stroke Z of the lifting mechanism 4, and the width is controlled by the swing angle α of the swing mechanism 2 and the curve radius R.

[0037] (Example 5)

[0038] On the basis of Example 3 or Example 4, the movement position Z of the lifting mechanism 4 is changed to form another HIFU ablation focus curved surface; the movement position Z of the lifting mechanism 4 is changed continuously and orderly, and the HIFU tissue ablation curved surface is continued to be used to form a HIFU three-dimensional curved cylindrical ablation body 9; the maximum height of the three-dimensional curved cylindrical ablation body is the maximum travel of the lifting mechanism 4Z movement, and the maximum diameter of the curved surface is equal to the sine product of the curve radius R and the maximum inclination angle α.

[0039] The mechanical structures of the swing mechanism 2, the rotating mechanism 3 and the lifting mechanism 4 in the present invention can be realized by various structural modes with the same motion effect, and are not limited to the structures drawn in the schematic diagram.

[0040] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for using an ultrasonic spherical curved surface scanning three-dimensional body treatment device, characterized in that: The ultrasonic spherical curved surface scanning three-dimensional body treatment device comprises an ultrasonic focusing transducer (1); a positioning probe lifting device and a positioning probe rotating device are installed in the central hole of the ultrasonic focusing transducer (1); the upper end of the ultrasonic focusing transducer (1) is connected in series with a swing mechanism (2), a rotating mechanism (3) and a lifting mechanism (4); the lower end of the swing mechanism (2) is hinged to the ultrasonic focusing transducer (1) through a swing rotating shaft (5), and the upper end of the swing mechanism (2) is fixedly connected to the rotating disk of the rotating mechanism (3); the rotating mechanism (3) is connected to the movable end of the lifting mechanism (4); the ultrasonic focusing transducer (1), the swing mechanism (2), the rotating mechanism (3), the lifting mechanism (4), the positioning probe lifting device, the positioning probe rotating device and a water tank water bag for containing coupling water form a HIFU treatment head, and the HIFU treatment head can form an ablation body of any shape in a three-dimensional curved surface cylinder by controlling the swing angle α of the swing mechanism, the rotation angle β of the rotation mechanism and the moving position Z parameter of the lifting mechanism; The swing angle α of the swing mechanism is the tilt angle formed by the swing mechanism (2) swinging left and right with the swing rotation axis (5) as the center axis, and the rotation angle β of the rotation mechanism is the rotation angle formed by the rotation mechanism (3) rotating with its longitudinal axis as the center axis; the swing mechanism (2) tilts the ultrasonic focusing transducer (1) at an angle α with the rotation axis of the swing mechanism (2) as the center, and when in use, the ultrasonic focusing transducer (1) generates an ablation lesion at the focal position of its acoustic axis; if the swing mechanism (2) changes the tilt angle α, the ultrasonic focusing transducer (1) will form another ablation lesion at a curve position with a curve radius R as the vertical distance from the center of the rotation axis of the swing mechanism (2) to the focal position of its acoustic axis; the tilt angle α is changed continuously and orderly, and when in use, an ablation lesion curve (6) will be generated on the curve.

2. The method for using the ultrasonic spherical surface scanning three-dimensional body treatment device according to claim 1, characterized in that: After the tissue ablation curve is formed, the movement position Z of the lifting mechanism (4) is changed, and the above-mentioned ablation focus curve is treated to form another ablation focus curve; the movement position Z of the lifting mechanism (4) is continuously changed, and the use of the HIFU tissue ablation curve is continued, and a HIFU ablation surface (8) will be formed. The height of the ablation surface is controlled by the movement stroke Z of the lifting mechanism (4), and the width is controlled by the swing angle α of the swing mechanism (2) and the curve radius R.

3. The method for using the ultrasonic spherical surface scanning three-dimensional body treatment device according to claim 1, characterized in that: The rotating mechanism (3) changes the rotation angle β, which will form another ablation focus at a circular ring position with the focus position of the inclination angle 0 as the center and the radius r being the product of the curve radius R and the sine of the inclination angle α; the rotation angle β is continuously and orderly changed to 0-360°, and when used, an ablation focus ring (7) will be generated on the tissue on the circular ring.

4. The method for using the ultrasonic spherical surface scanning three-dimensional body treatment device according to claim 3, characterized in that: After the tissue ablation ring is formed, the central inclination angle α of the swaying mechanism (2) is changed, and the above-mentioned ablation focus ring treatment is performed again to form another ablation focus ring; the swaying angle α of the swaying mechanism (2) is continuously changed, and the use of the HIFU tissue ablation focus ring is continued, which will form a HIFU ablation focus curved surface or a curved surface with a central hole; the maximum diameter of the ablation focus curved surface is equal to the product of the curve radius R and the sine of the maximum inclination angle α.

5. The method for using the ultrasonic spherical surface scanning three-dimensional body treatment device according to claim 2 or 4, characterized in that: The movement position Z of the lifting mechanism (4) changes to form another HIFU ablation focus curved surface; the movement position Z of the lifting mechanism (4) is changed continuously and orderly, and the HIFU tissue ablation curved surface is continued to be used to form a HIFU three-dimensional curved cylindrical ablation body (9); the maximum height of the three-dimensional curved cylindrical ablation body is the maximum travel of the lifting mechanism (4) Z movement, and the maximum diameter of the curved surface is equal to the product of the curve radius R and the sine of the maximum inclination angle α.

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