High-intensity focused ultrasound treatment device that focuses ultrasound using wave diffraction and interference

Abstract

The high-intensity focused ultrasound generating device according to the present invention has the advantage of enabling more accurate treatment of localized areas and allowing for procedures without wounds or scars by non-invasively focusing ultrasound to a desired area, as it can diffract, convert, and interfere ultrasound emitted from the transducer by placing an ultrasound focusing plate in front of the transducer. Additionally, by forming a plurality of slits on the ultrasound focusing plate, various ultrasound focusing points can be realized depending on the size or position of the slits. Furthermore, since the ultrasound focusing plate is detachably coupled to the front of the transducer, the ultrasound focusing plate can be replaced and applied according to the desired ultrasound focusing point.

Description

Technology Field

[0001] The present invention relates to a high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, and more specifically, to a high-intensity focused ultrasound generating device that focuses ultrasound through wave diffraction and interference, capable of realizing one or more ultrasound focusing points by inducing diffraction and interference on ultrasound generated from a transducer. Background Technology

[0002] Generally, a high-intensity focused ultrasound (HIFU) device is a device that can treat a patient's affected area without surgical intervention by focusing ultrasound waves generated from a transducer to produce high-intensity ultrasound energy and irradiating this energy onto the affected area to raise the temperature of the area.

[0003] Conventional high-intensity focused ultrasound generators have a problem in that they are difficult to commercialize because, as they mount multiple transducers on the front of a concave ultrasound radiation frame to focus the ultrasound generated from the transducers to a preset location, changing the direction of the focused ultrasound is very difficult and costly. Prior art literature

[0004] Korean Registered Patent No. 10-1952588 The problem to be solved

[0005] The objective of the present invention is to provide a high-intensity focused ultrasound generator that facilitates the focusing of ultrasound using wave diffraction and interference. means of solving the problem

[0006] A high-intensity focused ultrasound generating device according to the present invention, which focuses ultrasound using wave diffraction and interference, comprises: a transducer that emits ultrasound when power is applied; and an ultrasound focusing module disposed in front of the transducer, which causes the ultrasound waves to diffract as they pass through, converts at least one of them into waves having different phases, and induces interference of the converted waves to focus the waves at a preset ultrasound focusing point.

[0007] A high-intensity focused ultrasound generating device for focusing ultrasound using wave diffraction and interference according to another aspect of the present invention comprises a transducer that emits a plurality of ultrasound waves having at least one different phase when power is applied, and the transducer has a plurality of slits formed radially spaced apart from each other from the center to emit the plurality of ultrasound waves, thereby focusing the waves to a preset ultrasound focusing point.

[0008] The ultrasound passing through the above-mentioned ultrasound focusing module is converted into a spherical wave.

[0009] The above-described ultrasonic focusing module is an ultrasonic focusing plate that is positioned forward of the transducer and has at least a portion formed as a curved or inclined surface such that the distance from the transducer varies depending on the position.

[0010] The above-described ultrasonic focusing module is an ultrasonic focusing plate disposed at a set distance forward from the transducer and having a plurality of slits formed therein that convert the ultrasonic waves to have at least one different phase.

[0011] The size of the above slit is set according to the wavelength of the ultrasound.

[0012] Each position of the above slits is set according to the wavelength of the ultrasound, the arrangement order of the corresponding slits from the center slit among the plurality of slits, and the distance from the center slit to the ultrasound focusing point.

[0013] It further includes an ultrasonic radiation frame having a plurality of coupling holes formed therein, and transducer holders that are respectively inserted into the coupling holes at the front of the ultrasonic radiation frame, coupled so as to be detachably connected through the ultrasonic radiation frame, and have the transducers mounted with their front surfaces exposed.

[0014] A high-intensity focused ultrasound generating device for focusing ultrasound using wave diffraction and interference according to another aspect of the present invention comprises: an ultrasound radiating frame having a plurality of coupling holes formed therein; transducer holders each inserted into the coupling holes at the front of the ultrasound radiating frame and coupled so as to be detachably coupled through the ultrasound radiating frame; and transducers each mounted on the transducer holders with their front surfaces exposed and emitting ultrasound when power is applied to each. The invention includes an ultrasonic focusing module disposed in front of the transducer, which causes the ultrasonic waves to diffract as they pass through, converts at least one of the waves into different phases, and induces interference of the converted waves to focus the waves at a preset ultrasonic focusing point. The ultrasonic focusing module is an ultrasonic focusing plate disposed at a set distance forward from the transducer and having a plurality of slits formed therein that convert the ultrasonic waves into at least one different phase. The size of the slits is set according to the wavelength of the ultrasonic waves, and the position of each slit is set according to the wavelength of the ultrasonic waves, the arrangement order of the corresponding slits from the center slit among the plurality of slits, and the distance from the center slit to the ultrasonic focusing point.

[0015] A high-intensity focused ultrasound generating device for focusing ultrasound using wave diffraction and interference according to another aspect of the present invention comprises: an ultrasound radiating frame having a plurality of coupling holes formed therein; transducer holders that are each inserted into the coupling holes at the front of the ultrasound radiating frame and coupled so as to be detachably coupled through the ultrasound radiating frame; and transducers that are each mounted on the transducer holders with their front surfaces exposed and, when power is applied, emit at least one of a plurality of ultrasound waves having different phases, wherein the transducer has a plurality of slits formed radially spaced apart from each other from the center to emit the plurality of ultrasound waves, the size of the slits is set according to the wavelength of the ultrasound, and the position of each of the slits is set according to the wavelength of the ultrasound, the arrangement order of the corresponding slits from the center slit among the plurality of slits, and the distance from the center slit to a preset ultrasound focusing point.

[0016] A high-intensity focused ultrasound generating device according to another aspect of the present invention, which focuses ultrasound using wave diffraction and interference, comprises: a transducer that emits ultrasound when power is applied; an ultrasound focusing module disposed in front of the transducer, which causes the ultrasound waves to diffract as they pass through, converts at least one of the waves into waves having different phases, and induces interference of the converted waves to focus the waves at a preset ultrasound focusing point; and further comprises a coating layer coated with a sound-absorbing material on the surface of the transducer to absorb ultrasound reflected from the ultrasound focusing module.

[0017] A high-intensity focused ultrasound generating device according to another aspect of the present invention, which focuses ultrasound using wave diffraction and interference, comprises: a transducer that emits ultrasound when power is applied; and a coating layer coated on the surface of the transducer in a preset pattern of sound-absorbing material to diffract the waves of ultrasound emitted from the transducer, convert at least one of them into waves having a different phase, and induce interference of the converted waves to focus the waves at a preset ultrasound focusing point. Effects of the invention

[0018] The high-intensity focused ultrasound generating device according to the present invention has the advantage of being able to focus ultrasound on a desired area non-invasively, allowing for more accurate treatment of local areas and enabling procedures without wounds or scars, by placing an ultrasound focusing plate in front of the transducer to diffract, convert, and interfere with the ultrasound emitted from the transducer and focus it at a preset ultrasound focusing point.

[0019] In addition, by forming multiple slits on the ultrasonic focusing plate, various ultrasonic focusing points can be realized depending on the size or position of the slits.

[0020] In addition, since an ultrasonic focusing plate is detachably coupled to the front of the transducer, the ultrasonic focusing plate can be replaced and applied according to the desired ultrasonic focusing point. Brief explanation of the drawing

[0021] FIG. 1 is a schematic diagram illustrating the configuration of a high-intensity focused ultrasound generator that focuses ultrasound using wave diffraction and interference according to the first embodiment of the present invention. Figure 2 is an exploded perspective view of the ultrasonic focusing plate and transducer shown in Figure 1. Figure 3 is a side view of the ultrasonic focusing plate shown in Figure 2. FIG. 4 is a diagram schematically illustrating the ultrasonic focusing principle of an ultrasonic focusing plate according to the first embodiment of the present invention. FIG. 5 is a diagram schematically showing the relationship between the distance between slits and the ultrasonic focusing point according to an embodiment of the present invention. Figure 6 shows an example of the size and position of slits when the focal length is 20 mm in a high-intensity focused ultrasound generator according to an embodiment of the present invention. Figure 7 shows an example of simulating ultrasound focusing when the focal length is 20 mm in a high-intensity focused ultrasound generator according to an embodiment of the present invention. FIG. 8 is a diagram schematically illustrating the ultrasonic focusing principle of an ultrasonic focusing plate according to a second embodiment of the present invention. FIG. 9 is a plan view of an ultrasonic focusing plate according to a third embodiment of the present invention. FIG. 10 is a plan view of an ultrasonic focusing plate according to the fourth embodiment of the present invention. FIG. 11 is a plan view of an ultrasonic focusing plate according to the fifth embodiment of the present invention. FIG. 12 is a plan view of an ultrasonic focusing plate according to the 6th embodiment of the present invention. FIG. 13 is a plan view of an ultrasonic focusing plate according to the seventh embodiment of the present invention. FIG. 14 is a plan view of a transducer according to the eighth embodiment of the present invention. FIG. 15 is a cross-sectional view of the transducer and ultrasonic focusing plate shown in FIG. 14. FIG. 16 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the ninth embodiment of the present invention. FIG. 17 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the 10th embodiment of the present invention. FIG. 18 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the 11th embodiment of the present invention. FIG. 19 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the 12th embodiment of the present invention. Specific details for implementing the invention

[0022] Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.

[0023] FIG. 1 is a schematic diagram illustrating the configuration of a high-intensity focused ultrasound generator that focuses ultrasound using wave diffraction and interference according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the ultrasound focusing plate and transducer shown in FIG. 1. FIG. 3 is a side view of the ultrasound focusing plate shown in FIG. 2.

[0024] Referring to FIGS. 1 to 3, a high-intensity focused ultrasound generating device according to the first embodiment of the present invention includes an ultrasound radiation frame (10), a plurality of transducer holders (20), a plurality of transducers (30), and an ultrasound focusing module.

[0025] The ultrasonic radiation frame (10) is a frame having a plurality of coupling holes formed therein so that the transducer holders (20) are coupled thereto. The ultrasonic radiation frame (10) is formed with a flat front surface.

[0026] The transducer holders (20) are each detachably coupled to each of the plurality of coupling holes. The transducer (30) is mounted on the front of the transducer holder (20).

[0027] The transducer holder (20) comprises a head portion (20a) having a seating groove into which the transducer (30) is inserted and seated, and a body portion (20b) extending from the rear of the head portion (20a) and coupled to the coupling holes.

[0028] The transducer (30), the transducer holder (20), and the ultrasonic focusing module form a single module, and the module is configured to form an array of multiple modules. That is, in this embodiment, one ultrasonic focusing module is provided to match one transducer (30) to form a single module. However, this is not limited thereto, and it is also possible to provide one ultrasonic focusing module to match multiple transducers (30), and of course, it is also possible to provide multiple ultrasonic focusing modules to match one transducer (30).

[0029] In this embodiment, the transducer (30) is described as being coupled to the ultrasonic radiation frame (10) through the transducer holder (20), but it is not limited thereto and it is also possible for the transducer (30) to be directly coupled to the ultrasonic radiation frame (10). In this case, the transducer (30) and the ultrasonic focusing module can form a single module.

[0030] The above transducers (30) may include a piezoelectric element. In this embodiment, the transducers (30) are described as being formed in a disc shape. The number, size, and shape of the transducers can be varied depending on the ultrasonic energy to be radiated. Wires (31) may be connected to the upper and lower surfaces of the transducers (30).

[0031] The above transducer (30) generates ultrasonic waves when power is applied, and the ultrasonic waves are described as being plane waves. However, it is not limited to this, and the ultrasonic waves can, of course, be waves of a shape other than plane waves.

[0032] The above-described ultrasonic focusing module is positioned in front of each of the transducers (30) to cause the ultrasonic waves emitted from the transducers (30) to diffract as they pass through, convert at least one of them into waves having a different phase, and induce interference of the converted waves to focus the waves at a preset ultrasonic focusing point.

[0033] In this embodiment, the ultrasonic focusing module is described as an ultrasonic focusing plate (40) that is positioned so as to be spaced forward from the transducer (30), and at least a portion thereof is formed as a curved or inclined surface so that the distance from the transducer (30) varies depending on the position.

[0034] Referring to FIGS. 2 and FIGS. 3, the ultrasonic focusing plate (40) is shaped like a disc with a diameter larger than that of the transducer (20).

[0035] The ultrasonic focusing plate (40) includes a waveform conversion part (40a) facing the transducer (20) and a frame coupling part (40b) formed extending radially from the waveform conversion part (40a) and coupled to the ultrasonic radiation frame (10) by a coupling member (45).

[0036] The waveform conversion unit (40a) is formed to protrude forward, which is the direction of propagation of the ultrasound.

[0037] In this embodiment, the waveform conversion unit (40a) is described as having a convex shape. However, it is not limited thereto, and the waveform conversion unit (40a) may be formed in the shape of a square pyramid with an open bottom surface that protrudes in the direction of propagation of the ultrasound, or at least a portion may be formed with a stepped shape, or at least a portion may have an inclined surface. Furthermore, the waveform conversion unit (40a) may, of course, be formed in a shape that combines at least some of the convex shape, concave shape, square pyramid shape, planar shape, inclined surface shape, and stepped shape. That is, the waveform conversion unit (40a) can be modified and applied in various shapes as long as the spacing between the slits (42) described later and the transducer (30) is formed to be different.

[0038] In this embodiment, the waveform conversion part (40a) is described as having a protruding shape among the ultrasonic focusing plate (40), but it is not limited thereto; it is also possible for the entire ultrasonic focusing plate (40) to have a shape protruding forward, or for some or multiple regions of the waveform conversion part (40a) to have a shape protruding forward.

[0039] In the waveform conversion unit (40a), a plurality of slits (42) are formed to convert the ultrasound emitted from the transducer (30) into a plurality of waves having at least one different phase. The waveform conversion unit (40a) converts the ultrasound emitted from the transducer (30) into spherical waves and induces interference of the plurality of spherical waves to focus at least one ultrasound focusing point.

[0040] A plurality of fastening holes (41) are formed in the frame joint portion (40b) so that the joint member (45) can be fastened. The joint member (45) is described as a bolt and a nut.

[0041] The plurality of slits (42) include all holes or gaps formed in the ultrasonic focusing plate (40) through which the ultrasonic waves pass. In this embodiment, the plurality of slits (42) are spaced apart from each other at equal intervals in the up, down, left, and right directions and are regularly arranged in a matrix form. However, they are not limited thereto, and the plurality of slits (42) can be arranged in various forms.

[0042] The above slits (42) are described as holes with a circular cross-section, but are not limited thereto, and the cross-sectional shape of the slits (42) can be varied and applied.

[0043] In addition, the sizes of the slits (42) are described as being the same, but are not limited thereto and can, of course, be formed with different sizes.

[0044] The diffraction of the above ultrasound is affected by the size of the slits (42) and the wavelength of the ultrasound.

[0045] Accordingly, the size of the slits (42) is set differently depending on the wavelength (λ) of the ultrasound emitted from the transducer (30). Here, the size of the slit (42) includes the diameter of the cross-section of the slit (42), and it is preferable that the diameter of the slit (42) be formed to be larger than 1 / 4 of the wavelength (λ) of the ultrasound.

[0046] FIG. 5 is a schematic diagram showing the relationship between the distance between slits and the ultrasonic focusing point according to an embodiment of the present invention. FIG. 6 shows an example of the size and position of slits when the focal distance is 20 mm in a high-intensity focused ultrasound generator according to an embodiment of the present invention.

[0047] Referring to FIG. 5, an example is described in which two slits (42) are formed in the ultrasonic focusing plate (40). In FIG. 5, Δy represents the path difference of the waves.

[0048] The spacing distance (d) between the above slits (42) is the wavelength (λ) of the ultrasound, from the center slit (s0) among the plurality of slits (42) to the corresponding slit (s n The arrangement order of the ) is set according to the distance (y0) from the center slit (s0) to the ultrasonic focusing point (Focal point).

[0049] When there are multiple slits (42), the spacing distance (d) between the center slit (s0) and the nth slit n The formula for calculating ) is the same as mathematical formula 1.

[0050] [Mathematical Formula 1]

[0051]

[0052] Here, n is the arrangement order of the corresponding slits from the center slit, λ is the wavelength of the ultrasound, and y0 is the distance from the center slit to the screen. The screen is a location where a focusing point can be generated.

[0053] In the above mathematical formula 1, the spacing distance (d) between the slits (42) n When ) is calculated, the above separation distance (d n The position of the slits (42) can be set according to ).

[0054] Referring to FIG. 6, when the focal length is 20mm, the separation distance (d) calculated through Equation 1 n This shows an example of slits arranged according to ).

[0055] In FIG. 6, d1 represents the distance between the center slit (s0) and the first slit (s1), d2 represents the distance between the center slit (s0) and the second slit (s2), d3 represents the distance between the center slit (s0) and the third slit (s3), d4 represents the distance between the center slit (s0) and the fourth slit (s4), and d5 represents the distance between the center slit (s0) and the fifth slit (s5).

[0056] Referring to FIG. 6, it can be seen that the spacing between the slits (42) decreases as they move further away from the center slit (s0).

[0057] Figure 7 shows an example of simulating ultrasound focusing when the focal length is 20 mm in a high-intensity focused ultrasound generator according to an embodiment of the present invention.

[0058] Referring to FIG. 7, when the focal length is 20 mm, the positions of the slits (42) are set and arranged according to the separation distance calculated according to the above mathematical formula 1, and the ultrasonic focusing point is confirmed through simulation.

[0059] In addition, at least a portion of the surface of the transducer (30) may be coated with a sound-absorbing material (not shown) to provide a sound-absorbing layer (not shown) that absorbs ultrasonic waves reflected from the ultrasonic focusing plate (40).

[0060] The operation of a high-intensity focused ultrasound generator that focuses ultrasound using wave diffraction and interference according to the first embodiment of the present invention configured as described above is explained as follows.

[0061] When power is applied to the plurality of transducers (30), each of the transducers (30) generates and emits ultrasonic waves.

[0062] Here, the ultrasonic waves generated by each of the transducers (30) are described as a single plane wave. However, this is not limited thereto, and it is also possible for the plurality of transducers (30) to emit at least one ultrasonic wave having a different phase.

[0063] The ultrasonic waves emitted from the transducer (30) pass through the ultrasonic focusing plate (40) positioned in front of the transducer (30).

[0064] As the ultrasonic waves pass through the ultrasonic focusing plate (40), they are diffracted and converted into a plurality of spherical waves having at least one different phase, and the waves of the converted spherical waves cause interference and are focused at a preset ultrasonic focusing point.

[0065] That is, referring to FIG. 4a, the ultrasonic waves emitted from the transducer (30) are converted into multiple spherical waves as they pass through the plurality of slits (42).

[0066] Referring to FIG. 4b, the plurality of spherical waves are focused at a preset ultrasonic focusing point.

[0067] Accordingly, by positioning the ultrasound focusing plate (40) in front of the transducer (30), ultrasound can be focused non-invasively on a desired area, allowing for more accurate treatment of the local area and providing the advantage of being able to perform the procedure without wounds or scars.

[0068] In addition, the ultrasonic focusing point can be changed according to the size or position of the slits (42) formed in the ultrasonic focusing plate (40).

[0069] In addition, the ultrasonic focusing plate (40) is detachably coupled to the front of the transducer (30), so that the ultrasonic focusing plate (40) can be replaced according to the desired ultrasonic focusing point and applied to various ultrasonic focusing areas.

[0070] In addition, compared to the case where focusing is achieved using the shape of the ultrasonic radiation frame (10), there is an advantage that the structure is simple and partially replaceable.

[0071] Meanwhile, FIG. 8 is a diagram schematically illustrating the ultrasonic focusing principle of an ultrasonic focusing plate according to a second embodiment of the present invention.

[0072] Referring to FIG. 8, the ultrasonic focusing plate (240) according to the second embodiment of the present invention is different from the first embodiment in that it has a curved shape that is convex toward the rearward direction toward the transducer (30), and the rest of the configuration and operation are similar to the first embodiment. Therefore, the explanation focuses on the differences and the detailed explanation of the similarities is omitted.

[0073] The ultrasonic focusing plate (240) includes a waveform conversion part (240a) facing the transducer (20) and a frame coupling part (240b) formed to extend radially from the waveform conversion part (240a) and coupled to the ultrasonic radiation frame (10).

[0074] The waveform conversion unit (240a) is described as being formed in a concave shape so as to protrude toward the transducer (30).

[0075] In this embodiment, the waveform conversion unit (240a) is described as having a curved shape, but it is not limited thereto. It may also be formed to protrude in a square pyramid shape with an open bottom surface while protruding in a direction toward the transducer (30), or at least a portion formed with a stepped shape, or at least a portion formed with an inclined surface. That is, the waveform conversion unit (240a) can be modified and applied in various shapes as long as the distance between the slits (242) described later and the transducer (30) is different.

[0076] In this embodiment, the waveform conversion part (240a) of the ultrasonic focusing plate (240) is described as having a shape that protrudes backward, but it is not limited thereto; it is also possible for the entire ultrasonic focusing plate (240) to have a shape that protrudes backward, or for only a smaller area than the waveform conversion part (240a) to be formed to protrude backward.

[0077] A plurality of slits (242) are formed in the waveform conversion part (240a) of the above-mentioned ultrasonic focusing plate (240).

[0078] The size or position of the above slits (242) can be set differently depending on the desired ultrasonic focal point. That is, the size of the above slits (242) is set differently depending on the wavelength (λ) of the ultrasonic waves emitted from the transducer (30). Each position of the above slits (242) is, depending on the wavelength (λ) of the ultrasonic waves, the corresponding slit (s) from the center slit (s1) among the plurality of slits (242). n The arrangement order of the ) can be calculated and set according to the distance from the center slit (s1) to the ultrasonic focusing point (Focal point).

[0079] Referring to FIG. 8a, the ultrasonic waves emitted from the transducer (30) are converted into multiple spherical waves as they pass through the plurality of slits (242).

[0080] Referring to FIG. 8b, the plurality of spherical waves are focused at a preset ultrasonic focusing point.

[0081] In this embodiment, the ultrasonic waves emitted from the transducer (30) are described as being planar waves, but are not limited thereto and may have other shapes.

[0082] Meanwhile, FIG. 9 is a plan view of an ultrasonic focusing plate according to a third embodiment of the present invention.

[0083] Referring to FIG. 9, the ultrasonic focusing plate (340) according to the third embodiment of the present invention has a plurality of slits (342) formed therein, and the plurality of slits (342) are arranged to form a plurality of rows and columns, and the slits arranged in adjacent rows or adjacent columns are arranged in an alternating manner, which is different from the first embodiment, and the remaining configuration and operation are similar to the first embodiment, so a detailed description of the similar content is omitted.

[0084] The above slits (342) are described as holes with a circular cross-section, but are not limited thereto, and the cross-sectional shape of the slits (342) can be varied and applied.

[0085] In addition, the number of the above slits (342) can also be varied.

[0086] In addition, the sizes of the slits (342) are described as being the same, but are not limited thereto and can, of course, be formed with different sizes.

[0087] The size or position of the above slits (342) can be set differently depending on the desired ultrasonic focal point. That is, the size of the above slits (342) is set differently depending on the wavelength (λ) of the ultrasonic waves emitted from the transducer (30). Each position of the above slits (342) is, depending on the wavelength (λ) of the ultrasonic waves, the corresponding slit (s) from the center slit (s1) among the plurality of slits (342). n The arrangement order of the ) can be calculated and set according to the distance from the center slit (s1) to the ultrasonic focusing point (Focal point).

[0088] In this embodiment, the ultrasonic waves emitted from the transducer (30) are described as being planar waves, but are not limited thereto and may have other shapes.

[0089] Additionally, the ultrasonic focusing plate (340) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (30) varies depending on the position. Furthermore, the ultrasonic focusing plate (340) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (30). However, it is not limited thereto, and can be modified and applied in various shapes as long as the distance from the slits (342) of the ultrasonic focusing plate (340) and the transducer (30) varies depending on the position.

[0090] Meanwhile, FIG. 10 is a plan view of an ultrasonic focusing plate according to the fourth embodiment of the present invention.

[0091] Referring to FIG. 10, the ultrasonic focusing plate (440) according to the fourth embodiment of the present invention has a plurality of slits (442) formed therein, and the plurality of slits (442) are arranged radially from the center of the ultrasonic focusing plate (440), which is different from the first embodiment, and the remaining configuration and operation are similar to the first embodiment, so a detailed description of the similar content is omitted.

[0092] The above slits (442) are described as being arranged to form a virtual circle among slits arranged within the same radius from the center of the ultrasonic focusing plate (440).

[0093] The above slits (442) are described as holes with a circular cross-section, but are not limited thereto, and the cross-sectional shape of the slits (442) can be varied and applied.

[0094] In addition, the number of the above slits (442) can also be varied.

[0095] In addition, the sizes of the slits (442) are described as being the same, but are not limited thereto and can, of course, be formed with different sizes.

[0096] The size or position of the above slits (442) can be set differently depending on the desired ultrasonic focal point. That is, the size of the above slits (442) is set differently depending on the wavelength (λ) of the ultrasonic waves emitted from the transducer (30). Each position of the above slits (442) is, depending on the wavelength (λ) of the ultrasonic waves, the corresponding slit (s) from the center slit (s1) among the plurality of slits (442). n The arrangement order of the ) can be calculated and set according to the distance from the center slit (s1) to the ultrasonic focusing point (Focal point).

[0097] In this embodiment, the ultrasonic waves emitted from the transducer (30) are described as being planar waves, but are not limited thereto and may have other shapes.

[0098] Additionally, the ultrasonic focusing plate (440) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (30) varies depending on the position. Furthermore, the ultrasonic focusing plate (440) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (30). However, it is not limited thereto, and can be modified and applied in various shapes as long as the distance between the slits (442) of the ultrasonic focusing plate (440) and the transducer (30) varies depending on the position.

[0099] Meanwhile, FIG. 11 is a plan view of an ultrasonic focusing plate according to the fifth embodiment of the present invention.

[0100] Referring to FIG. 11, the slits (542) of the ultrasonic focusing plate (540) according to the fifth embodiment of the present invention include a central hole (542a) and a plurality of around holes (542b) arranged spaced apart from each other in the circumferential and radial directions, which is different from the first embodiment, and the remaining configuration and operation are similar to the first embodiment, so the explanation focuses on the differences and the detailed explanation of the similarities is omitted.

[0101] The above center hole (542a) is described as having a circular cross-section, but is not limited thereto and can be applied with various cross-sectional shapes.

[0102] The above-described around holes (542b) are described as holes arranged in a plurality of circumferential and radial directions and having a cross-section in the shape of an arc. However, they are not limited to this, and the cross-sectional shape of the around holes (542b) can be varied and applied in various ways.

[0103] Among the above-mentioned around holes (542), the holes located within the same radius from the center hole (542a) are arranged to form a virtual circle. Additionally, the around holes (542) have an arc length (l) as they extend radially. n ) is formed in a long shape. In addition, the around holes (542) are arranged to form spherical symmetry around the center hole (542a).

[0104] In addition, the number of the above-mentioned around holes (542b) can also be varied and applied.

[0105] Additionally, the radial width (w) of the around holes (542b) is described as being the same as the others, but is not limited thereto and can, of course, be formed differently.

[0106] The size or position of the center hole (542a) and the surrounding holes (542b) is set differently depending on the desired ultrasonic focal point.

[0107] In this embodiment, the ultrasonic waves emitted from the transducer (30) are described as being planar waves, but are not limited thereto and may have other shapes.

[0108] Additionally, the ultrasonic focusing plate (540) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (30) varies depending on the position. Furthermore, the ultrasonic focusing plate (540) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (30). However, it is not limited thereto, and can be modified and applied in various shapes as long as the distance from the slits (542) of the ultrasonic focusing plate (540) and the transducer (30) varies depending on the position.

[0109] Meanwhile, FIG. 12 is a plan view of an ultrasonic focusing plate according to the 6th embodiment of the present invention.

[0110] Referring to FIG. 12, the slits (642) of the ultrasonic focusing plate (640) according to the 6th embodiment of the present invention include a central hole (642a) and a plurality of around holes (642b) arranged spaced apart in the circumferential and radial directions, but the around holes (642) are arranged staggered from each other, which is different from the 5th embodiment. Since the remaining configuration and operation are similar to the 5th embodiment, the explanation will focus on the differences and the detailed explanation of the similarities will be omitted.

[0111] The above center hole (642a) is described as having a circular cross-section as an example, but is not limited thereto and the cross-sectional shape can be varied and applied.

[0112] The above-described around holes (642b) are described as holes arranged in a plurality of circumferential and radial directions and having a cross-section in the shape of an arc. However, they are not limited to this, and the cross-sectional shape of the around holes (642b) can be varied and applied in various ways.

[0113] Among the above-mentioned around holes (642), the holes located within the same radius from the center hole (642a) are arranged to form a virtual circle. Additionally, the around holes (642) have an arc length (l) as they extend radially. n ) is formed in a long shape.

[0114] In addition, the around holes (642) are arranged staggered from each other so as not to form spherical symmetry with respect to the center hole (542a).

[0115] In addition, the number of the above-mentioned around holes (642b) can be varied.

[0116] Additionally, the radial width (w) of the around holes (642b) is described as being the same as the others, but is not limited thereto and can, of course, be formed differently.

[0117] The size or position of the center hole (642a) and the surrounding holes (642b) is set differently depending on the desired ultrasonic focal point.

[0118] In this embodiment, the ultrasonic waves emitted from the transducer (30) are described as being planar waves, but are not limited thereto and may have other shapes.

[0119] Additionally, the ultrasonic focusing plate (640) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (30) varies depending on the position. Furthermore, the ultrasonic focusing plate (640) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (30). However, it is not limited thereto, and can be modified and applied in various shapes as long as the distance between the slits (3642) of the ultrasonic focusing plate (640) and the transducer (30) varies depending on the position.

[0120] Meanwhile, FIG. 13 is a plan view of an ultrasonic focusing plate according to the seventh embodiment of the present invention.

[0121] Referring to FIG. 13, the slits (742) of the ultrasonic focusing plate (740) according to the 7th embodiment of the present invention include a central hole (742a) and a plurality of around holes (742b) arranged radially spaced apart from the central hole (742a). The around holes (742) are formed with a cross-section in the shape of a ring, which is different from the 5th embodiment. The remaining configuration and operation are similar to the 5th embodiment, so the explanation focuses on the differences and the detailed explanation of the similarities is omitted.

[0122] The above center hole (742a) is described as having a circular cross-section, but is not limited thereto and the cross-sectional shape can be varied and applied.

[0123] The above-mentioned around holes (742b) are described as holes that are arranged radially spaced apart from the center hole (742a) and have a ring-shaped cross section. However, this is not limited to this, and the cross-sectional shape of the around holes (742b) can be varied and applied.

[0124] In addition, the number of the above-mentioned around holes (742b) can be varied.

[0125] Additionally, the radial width (w) of the around holes (742b) is described as being the same as the others, but is not limited thereto and can, of course, be formed differently.

[0126] The size or position of the center hole (742a) and the surrounding holes (742b) may be formed such that at least a portion of them are stepped at the desired ultrasonic focal point. Additionally, the ultrasonic focusing plate (740) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (30). However, it is not limited to this, and if the distance between the slits (742) of the ultrasonic focusing plate (740) and the transducer (30) is formed to vary depending on the position, it can be modified and applied in various shapes.

[0127] Meanwhile, FIG. 14 is a plan view of a transducer according to the eighth embodiment of the present invention. FIG. 15 is a cross-sectional view of the transducer and the ultrasonic focusing plate shown in FIG. 14.

[0128] Referring to FIGS. 14 and 15, the transducer (830) according to the eighth embodiment of the present invention is different from the first embodiment in that it has a plurality of slits (835) formed radially spaced apart from each other from the center to emit a plurality of ultrasonic waves, and the rest of the configuration and operation are similar to the first embodiment. Therefore, the explanation focuses on the differences and the detailed explanation of the similarities is omitted.

[0129] The above transducer (830) includes a disc portion (831) positioned at the center and a plurality of ring portions (832) positioned at a predetermined distance in the radial direction from the disc portion (831).

[0130] The slits (835) are formed between the disc portion (831) and the ring portion (832), and between the ring portions (832). Here, a connecting portion (not shown) may be provided between the disc portion (831) and the ring portion (832).

[0131] In this embodiment, the ring portion (832) is described as being composed of four equal radial widths (w1), but it is not limited thereto, and it is also possible for the widths (w1) of each ring portion (832) to be formed differently from one another.

[0132] The width (w1) of the above ring portions (832) or the width (w2) of the above slits (835) can be changed according to the wavelength of the ultrasound or the desired ultrasound focal point.

[0133] Accordingly, the transducer (830) can emit waves having at least one phase when power is applied.

[0134] In this embodiment, the ultrasonic waves emitted from the transducer (830) are described as being planar waves, but are not limited thereto and may have other shapes.

[0135] In this embodiment, an ultrasonic focusing module is described as being disposed in front of the transducer (830), but is not limited thereto. If slits (835) are formed in the transducer (830), it is also possible to omit the ultrasonic focusing module.

[0136] The above ultrasonic focusing module is an ultrasonic focusing plate (840) that diffracts and induces interference of the ultrasonic waves emitted from the transducer (830) to focus the ultrasonic waves at a preset ultrasonic focusing point.

[0137] In this embodiment, the ultrasonic focusing plate (840) is described as being formed in a disc shape that is larger than the transducer (830) and has no holes formed therein. However, it is not limited thereto, and it is also possible for the ultrasonic focusing plate (840) to have slits formed therein as in the embodiments.

[0138] However, not limited thereto, the ultrasonic focusing plate (840) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (830) varies depending on the position. Additionally, the ultrasonic focusing plate (840) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (830). However, not limited thereto, it may be applied by changing to various shapes as long as the distance between the ultrasonic focusing plate (840) and the slits (835) of the transducer (830) varies depending on the position.

[0139] Meanwhile, FIG. 16 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the ninth embodiment of the present invention.

[0140] Referring to FIG. 16, the high-intensity focused ultrasound generating device according to the ninth embodiment of the present invention is different from the first embodiment in that one ultrasound focusing plate (940) is installed in front of a plurality of transducers (930), and the rest of the configuration and operation are similar to the first embodiment, so the description focuses on the differences and a detailed description of the similarities is omitted.

[0141] The above transducer (930) can be any of the transducer (30) of the first embodiment or the transducer (830) of the eighth embodiment.

[0142] The above-mentioned ultrasonic focusing plate (940) is installed in front of a plurality of transducers (930) and diffracts, converts, and interferes the ultrasonic waves emitted from each of the plurality of transducers (930) to focus them at a preset ultrasonic focusing point for each transducer (930).

[0143] In the above ultrasonic focusing plate (940), a plurality of slits (942) are formed at each position facing the plurality of transducers (930).

[0144] The above slits (942) may be applied to any one of the first to seventh embodiments.

[0145] In this embodiment, a plurality of transducers (930) are provided with one ultrasonic focusing plate (940) to form a single module, and the module is configured to form an array. However, this is not limited thereto, and it is also possible to provide a plurality of ultrasonic focusing plates (940) to one transducer (930).

[0146] In this embodiment, the ultrasonic waves emitted from the transducer (930) are described as being planar waves, but are not limited thereto and may have other shapes.

[0147] Additionally, the ultrasonic focusing plate (940) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (930) varies depending on the position. Furthermore, the ultrasonic focusing plate (340) may have a shape that protrudes convexly in the direction of the ultrasonic wave propagation, or a shape that protrudes convexly in the direction toward the transducer (930). However, it is not limited thereto, and can be modified and applied in various shapes as long as the distance from the slits (942) of the ultrasonic focusing plate (940) and the transducer (930) varies depending on the position.

[0148] Meanwhile, FIG. 17 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the 10th embodiment of the present invention.

[0149] Referring to FIG. 17, the high-intensity focused ultrasound generating device according to the 10th embodiment of the present invention is different from the first embodiment in that a plurality of ultrasound focusing plates (140) are arranged in multiple stages in the direction of ultrasound propagation in front of the transducer (130), and the rest of the configuration and operation are similar to the first embodiment. Therefore, the description focuses on the differences and omits detailed descriptions of the similarities.

[0150] The above transducer (130) can be any of the transducer (30) of the first embodiment or the transducer (830) of the eighth embodiment.

[0151] In this embodiment, two first and second ultrasonic focusing plates (141) and (142) are matched to one transducer (130) to form a single module, and the module is configured to form an array of multiple modules. However, this is not limited thereto, and the number of ultrasonic focusing plates (140) can be varied depending on the ultrasonic energy or the ultrasonic focusing point.

[0152] The first ultrasonic focusing plate (141) is positioned in front of the transducer (130) and has a plurality of first slits (141a) formed therein. The shape or arrangement of the first slits (141a) can be varied according to the embodiments.

[0153] The second ultrasonic focusing plate (142) is positioned at a predetermined distance from the front of the first ultrasonic focusing plate (141) in the direction of propagation of the ultrasonic waves, and a plurality of second slits (142a) are formed. The shape or arrangement of the second slits (142a) can be applied in various ways according to the above embodiments.

[0154] The first slits (141a) and the second slits (142a) may be formed with the same size, shape, position, and arrangement as each other, or at least some parts may be formed differently depending on the ultrasonic energy or the ultrasonic focusing point. The first slits (141a) and the second slits (142a) may be any one of the first to seventh embodiments.

[0155] In this embodiment, the ultrasonic waves emitted from the transducer (130) are described as being planar waves, but are not limited thereto and may have other shapes.

[0156] Additionally, the ultrasonic focusing plate (140) may be formed with at least a portion having a curved or inclined surface, or at least a portion having a stepped shape, so that the distance from the transducer (130) varies depending on the position. Furthermore, the ultrasonic focusing plate (140) may have a shape that protrudes convexly in the direction of propagation of the ultrasonic waves, or a shape that protrudes convexly in the direction toward the transducer (130). However, it is not limited thereto, and it is also possible to form the first slits (141a) of the first ultrasonic focusing plate (141) so that the distance from the transducer (130) varies depending on the position, or to form the second slits (142a) of the second ultrasonic focusing plate (142) so that the distance from the first ultrasonic focusing plate (141) varies depending on the position.

[0157] In addition, the first ultrasonic focusing plate (141) and the second ultrasonic focusing plate (142) may be formed with the same size or shape as each other, or at least some parts may be formed differently depending on the ultrasonic energy or the ultrasonic focusing point.

[0158] Meanwhile, FIG. 18 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the 11th embodiment of the present invention.

[0159] Referring to FIG. 18, the high-intensity focused ultrasound generating device according to the 11th embodiment of the present invention is different from the above embodiments in that it includes a transducer (930) and a coating layer (940) coated on the surface of the transducer (930) in a preset pattern using a sound-absorbing material to diffract the waves of ultrasound emitted from the transducer and convert at least one of them into waves having a different phase, and induce interference of the converted waves to focus the waves at a preset ultrasound focusing point. Since the remaining configuration and operation are similar, a detailed description of the similar configuration is omitted.

[0160] The above coating layer (940) can be applied to any sound-absorbing material capable of absorbing ultrasound, which is coated on the surface of the transducer (930).

[0161] The thickness of the coating layer (940) can be varied, and it may be shaped to be convexly protruding in the direction of the ultrasonic wave propagation, or convexly protruding in the direction toward the transducer (930), or flat, or it may be formed with steps or slopes.

[0162] The above pattern may be applied in a form in which a plurality of holes (940) are arranged in various ways. The holes (940a) may all be slit shapes of the above embodiments.

[0163] Meanwhile, FIG. 19 is a schematic diagram illustrating a high-intensity focused ultrasound generator according to the 12th embodiment of the present invention.

[0164] Referring to FIG. 19, the high-intensity focused ultrasound generating device according to the 12th embodiment of the present invention may, of course, include one transducer (30) and one ultrasound focusing plate (40).

[0165] The present invention has been described with reference to the embodiments illustrated in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and equivalent alternative embodiments are possible therefrom. Accordingly, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims. Explanation of the symbols

[0166] 10: Ultrasonic radiation frame 20: Transducer holder 30, 830: Transducer 40,140,240,340,440,540,640,740,840,940: Ultrasonic focusing plate 42,142,242,342,442,542,642,742,942: slit

Claims

Claim 1 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, comprising: a transducer that emits ultrasound when power is applied; and an ultrasound focusing module disposed in front of the transducer, which causes the ultrasound waves to diffract as they pass through, converts at least one of the converted waves into waves having a different phase, and induces interference of the converted waves to focus the waves at a preset ultrasound focusing point, wherein the ultrasound focusing module is an ultrasound focusing plate disposed at a set distance forward from the transducer and having a plurality of slits formed therein that convert the ultrasound waves to have at least one different phase. Claim 2 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, comprising a transducer that emits a plurality of ultrasound waves having at least one different phase when power is applied, wherein the transducer is characterized by having a plurality of slits formed radially spaced apart from each other from a center to emit the ultrasound waves and to focus the waves at a preset ultrasound focusing point, and comprising an ultrasound focusing plate disposed at a set distance forward from the transducer and having a plurality of slits formed therein to convert the ultrasound waves to have at least one different phase. Claim 3 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, characterized in that, in claim 1, the ultrasound passing through the ultrasound focusing module is converted into a spherical wave. Claim 4 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, wherein, in claim 1, the ultrasonic focusing module is an ultrasonic focusing plate that is positioned so as to be spaced forward from the transducer, and at least a portion thereof is formed as a curved or inclined surface so as to have a different distance from the transducer depending on the position. Claim 5 delete Claim 6 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, wherein, in claim 1 or claim 2, the size of the slit is set according to the wavelength of the ultrasound. Claim 7 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, wherein, in claim 1 or claim 2, each position of the slits is set according to the wavelength of the ultrasound, the arrangement order of the slits from the center slit among the plurality of slits, and the distance from the center slit to the ultrasound focusing point. Claim 8 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, wherein, in claim 1 or claim 2, the ultrasonic radiation frame having a plurality of coupling holes formed therein, and transducer holders each inserted into the coupling holes at the front of the ultrasonic radiation frame, coupled so as to be detachably coupled through the ultrasonic radiation frame, and the transducers are mounted such that their front surfaces are exposed. Claim 9 The apparatus comprises: an ultrasonic radiation frame having a plurality of coupling holes formed therein; transducer holders each inserted into the coupling holes at the front of the ultrasonic radiation frame and coupled so as to be detachably coupled through the ultrasonic radiation frame; transducers each mounted on the transducer holders with their front surfaces exposed and emitting ultrasound when power is applied to each; and an ultrasonic focusing module disposed in front of the transducer, which causes the ultrasonic waves to diffract as they pass through, converts at least one of them into waves having a different phase, induces interference of the converted waves, and focuses the waves at a preset ultrasonic focusing point. The ultrasonic focusing module is an ultrasonic focusing plate disposed at a set distance forward from the transducer and having a plurality of slits formed therein that convert the ultrasonic waves to have at least one different phase. The size of the slits is set according to the wavelength of the ultrasound, and the position of each slit is determined by the wavelength of the ultrasound, the arrangement order of the corresponding slits from the center slit among the plurality of slits, and the center A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, set according to the distance from the slit to the ultrasound focusing point. Claim 10 delete Claim 11 delete Claim 12 A high-intensity focused ultrasound generating device that focuses ultrasound using wave diffraction and interference, comprising: a transducer that emits ultrasound when power is applied; and a coating layer coated on the surface of the transducer in a preset pattern of sound-absorbing material to diffract the waves of the ultrasound emitted from the transducer, convert at least one of them into waves having a different phase, and induce interference of the converted waves to focus the waves at a preset ultrasound focusing point.

Images