CN108261611B - Therapeutic beam-emitting device - Google Patents
Therapeutic beam-emitting device Download PDFInfo
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- CN108261611B CN108261611B CN201611263195.4A CN201611263195A CN108261611B CN 108261611 B CN108261611 B CN 108261611B CN 201611263195 A CN201611263195 A CN 201611263195A CN 108261611 B CN108261611 B CN 108261611B
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- 230000001225 therapeutic effect Effects 0.000 title claims abstract description 156
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 19
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052804 chromium Inorganic materials 0.000 claims description 7
- 239000011651 chromium Substances 0.000 claims description 7
- 229910052759 nickel Inorganic materials 0.000 claims description 7
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000008213 purified water Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N7/00—Ultrasound therapy
- A61N2007/0086—Beam steering
- A61N2007/0091—Beam steering with moving parts, e.g. transducers, lenses, reflectors
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Radiology & Medical Imaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a therapeutic beam shooting device, which comprises a focusing transducer, a reflecting catheter and a reflecting catheter, wherein the focusing transducer is used for emitting therapeutic waves and can enable the emitted therapeutic waves to be converged into an inlet focus area, the reflecting catheter is positioned on the output side of the focusing transducer, so that the inlet focus area formed by converging the therapeutic waves is positioned in the reflecting catheter, the reflecting catheter comprises a catheter inlet and a catheter outlet, the reflecting catheter is used for containing a therapeutic wave transmission medium, and the reflecting catheter can transmit the therapeutic waves entering from the catheter inlet to the catheter outlet. The therapeutic wave beam device provided by the invention transmits the therapeutic wave output by the focusing transducer to the designated position through the reflecting catheter, so that the transmission direction of the therapeutic wave is changed, and the problem that the transmission path of the therapeutic wave cannot be changed in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of ultrasonic treatment equipment, in particular to a treatment beam emission device.
Background
Ultrasonic waves are high-frequency vibration mechanical waves, and have the characteristic of excellent directivity (namely beam-shooting property) due to high frequency and short wavelength. Directional straight line propagation can be achieved when the ultrasonic waves propagate in a uniform medium. However, in practical applications, it is sometimes necessary to change the propagation path of the ultrasonic wave at any time, and in order not to affect the final use effect of the ultrasonic wave, it is necessary to reduce the energy loss of the ultrasonic wave as much as possible when the propagation path is changed to propagate the ultrasonic wave. The prior art uses a flexible cable or wireless connection to the terminal ultrasound emitting device, and then the emitting device is sized and shaped to accommodate the needs to reach different locations or for different scenarios. However, if the power required is extremely large or restrictions on the environment surrounding the location itself are imposed, the transducers used are extremely large or the means required to move the ultrasound application device are excessively heavy or complex and costly.
Disclosure of Invention
The invention aims to solve one of the technical problems in the prior art and provides a therapeutic beam emitting device.
As one aspect of the present invention, there is provided a therapeutic beam irradiation device comprising a focusing transducer for emitting a therapeutic wave and capable of converging the emitted therapeutic wave into an inlet focal region, wherein the therapeutic beam irradiation device further comprises a reflection catheter located at an output side of the focusing transducer such that the inlet focal region into which the therapeutic wave is converged is located within the reflection catheter, the reflection catheter comprising a catheter inlet and a catheter outlet, the reflection catheter being for accommodating a therapeutic wave transmission medium, and the reflection catheter being capable of transmitting the therapeutic wave entered from the catheter inlet to the catheter outlet.
Preferably, the reflection conduit includes an inlet portion, an outlet portion, and a body portion connecting the inlet portion and the outlet portion, the conduit inlet is formed on the inlet portion, the conduit outlet is formed on the outlet portion, and the aperture of the inlet portion is larger than the inner diameter of the body portion.
Preferably, a first reflective layer is provided on an inner wall of the main body portion, the first reflective layer being capable of reflecting the therapeutic wave entering the main body portion.
Preferably, the inner diameter of the body portion is greater than the wavelength of the therapeutic wave as it is transmitted in the therapeutic wave transmission medium within the body portion.
Preferably, the inner diameter of the main body portion is larger than the dimension of the inlet focal region in a direction perpendicular to the transmission direction of the therapeutic wave.
Preferably, the wall thickness of the main body portion and the wavelength of the therapeutic wave when transmitted in the wall of the main body portion satisfy the following relation:
D＝n*λ/4，
wherein D is a wall thickness of the main body portion;
n is an odd number;
λ is the wavelength of the therapeutic wave as it propagates in the wall of the body portion.
Preferably, the first reflecting layer includes a reflecting sheet having a tooth-like structure, and an included angle formed between the reflecting sheet and an inner wall of the main body portion along a direction toward the outlet of the duct is an acute angle.
Preferably, the angle between the reflective sheet and the inner wall of the main body portion in the direction towards the outlet of the duct is between 0 ° and 45 °.
Preferably, the first reflective layer is integrally formed with the body portion.
Preferably, the first reflective layer is made of a material including chromium or nickel.
Preferably, the main body portion includes a straight portion and at least one curved portion connected to the straight portion, the straight portion is connected to the inlet portion, a central angle corresponding to each curved portion is smaller than 90 °, and a radius of curvature of each curved portion is larger than a diameter of the main body portion.
Preferably, the angle between the axis of the straight portion and the tangent of the curved portion connected to the straight portion at the intersection with the straight portion is between 0 ° and 30 °.
Preferably, the therapeutic beam irradiation device further comprises a dispersing structure and a refocusing structure,
the dispersing structure is positioned at the catheter outlet of the reflecting catheter, the dispersing structure comprises a plurality of dispersing walls, the outer walls of the dispersing walls are provided with second reflecting layers, the second reflecting layers can reflect the therapeutic waves transmitted to the catheter outlet,
the refocusing structure is located at the outlet of the reflecting catheter and connected with the reflecting catheter, the refocusing structure comprises a plurality of refocusing walls, the refocusing walls are in one-to-one correspondence with the dispersing walls, the inner walls of each refocusing wall are opposite to the outer walls of the dispersing walls, a third reflecting layer is arranged on the inner walls of the refocusing walls, and the third reflecting layer can reflect the therapeutic waves reflected by the second reflecting layer and then converge the therapeutic waves into an outlet focus area.
Preferably, the focusing transducer comprises an ultrasonic wave generating means capable of emitting ultrasonic waves.
According to the therapeutic beam shooting device provided by the invention, the reflective guide pipe is arranged at the position of the inlet focus area where the therapeutic waves of the focusing transducer are converged, the therapeutic waves output by the focusing transducer are transmitted to the designated position through the reflective guide pipe, the transmission direction of the therapeutic waves is changed, the problem that the transmission path of the therapeutic waves cannot be changed in the prior art is solved, and in addition, the therapeutic beam shooting device provided by the invention does not need to increase the power of the focusing transducer or change the focusing transducer, and is simple in structure and easy to realize.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic diagram of a therapeutic beam emitting device according to the present invention;
FIG. 2 is a schematic diagram of another embodiment of a therapeutic beam emitting device according to the present invention;
FIG. 3 is a schematic view of a structure of a reflective sheet in a main body according to the present invention;
FIG. 4 is a schematic structural view of a main body according to the present invention;
FIG. 5 is a schematic cross-sectional view of a dispersion structure and a refocusing structure provided by the invention.
Wherein, 10, reflecting conduit; 11. an inlet portion; 12. an outlet portion; 13. a main body portion; 131. a first reflective layer; 14. a dispersion structure; 141. a second reflective layer; 15. a refocusing structure; 151. a third reflective layer; 16. a region to be treated; 17. an entrance focal region; 18. an outlet focal region; 1311. a reflection sheet; 132. a straight line portion; 133. a bending portion; 20. a focusing transducer.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
As one aspect of the present invention, there is provided a therapeutic beam irradiation device, as shown in fig. 1, comprising a focusing transducer 20, the focusing transducer 20 being configured to emit therapeutic waves and being capable of converging the emitted therapeutic waves into an inlet focal region 17, wherein the therapeutic beam irradiation device further comprises a reflecting catheter 10, the reflecting catheter 10 being located at an output side of the focusing transducer 20 such that the inlet focal region 17 into which the therapeutic waves are converged is located within the reflecting catheter 10, the reflecting catheter 10 comprising a catheter inlet and a catheter outlet, the reflecting catheter 10 being configured to accommodate a therapeutic wave transmission medium, and the reflecting catheter 10 being capable of transmitting therapeutic waves entered from the catheter inlet to the catheter outlet.
According to the therapeutic beam shooting device provided by the invention, the reflective guide pipe is arranged at the position of the inlet focus area where the therapeutic waves of the focusing transducer are converged, the therapeutic waves output by the focusing transducer are transmitted to the designated position through the reflective guide pipe, the transmission direction of the therapeutic waves is changed, the problem that the transmission path of the therapeutic waves cannot be changed in the prior art is solved, and in addition, the therapeutic beam shooting device provided by the invention does not need to increase the power of the focusing transducer or change the focusing transducer, and is simple in structure and easy to realize.
In order to enable therapeutic waves output from the focusing transducer 20 to be entirely introduced into the reflection catheter 10 and to be transmitted within the reflection catheter 10, as one specific embodiment of the reflection catheter 10, as shown in fig. 1, the reflection catheter 10 includes an inlet portion 11, an outlet portion 12, and a body portion 13 connecting the inlet portion 11 and the outlet portion 12, the catheter inlet being formed on the inlet portion 11, the catheter outlet being formed on the outlet portion 12, and the inlet portion 11 having a caliber larger than an inner diameter of the body portion 13.
Further, in order to transmit all the therapeutic waves output from the focusing transducer 20 to a designated position, the transmission efficiency of the therapeutic waves is improved, and as a specific embodiment, the first reflective layer 131 is disposed on the inner wall of the main body 13, and the first reflective layer 131 can reflect the therapeutic waves entering the main body 13.
The first reflective layer 131 on the inner wall of the main body 13 can reflect the therapeutic wave, and the therapeutic wave is transmitted to a designated position by the continuous reflection of the first reflective layer 131.
It will be appreciated that in order for the therapeutic wave to be transmitted within the body portion 13, the inner diameter of the body portion 13 is greater than the wavelength of the therapeutic wave as it is transmitted in the therapeutic wave transmission medium within the body portion 13.
For example, the inner diameter of the main body 13 is d 1 The therapeutic wave transmission medium in the main body part 13 is purified water, and the wavelength of the therapeutic wave when transmitted in the purified water is lambda 1 The inner diameter d of the main body 13 1 ＞λ 1 The therapeutic wave can be transmitted in the main body 13.
As a preferred embodiment of the inner diameter of the body part 13, the therapeutic waves converge into an inlet focal region 17, the inner diameter of the body part 13 being larger than the dimension of the inlet focal region 17 in a direction perpendicular to the transmission direction of the therapeutic waves.
It will be appreciated that the therapeutic wave output by the focusing transducer 20 is focused into an inlet focal region 17, and the inlet focal region 17 may be understood as a beam of therapeutic wave, and when the inlet focal region 17 is circular, the inner diameter of the main body 13 is larger than the diameter of the inlet focal region 17, so that the therapeutic wave enters the main body 13 and is normally transmitted in the main body 13, and of course, the shape of the inlet focal region 17 is not limited, and the shape of the inlet focal region 17 is elliptical, as shown in fig. 1, and the inner diameter of the main body 13 is larger than the dimension of the elliptical inlet focal region 17 in the direction perpendicular to the transmission direction of the therapeutic wave, so that the therapeutic wave is transmitted in the main body 13.
In order to reduce energy loss when the therapeutic wave is transmitted in the main body 13, the therapeutic wave may be transmitted to the catheter outlet from the catheter inlet to the maximum extent, and total reflection may be formed when the therapeutic wave is transmitted in the main body 13 by changing the material of the main body 13 or the material of the first reflective layer 131 and the material of the therapeutic wave transmission medium in the main body 13.
For example, the therapeutic wave is exemplified by the ultrasonic wave, and when the transmission medium of the ultrasonic wave contained in the main body 13 is pureIn the case of water, the material of the main body 13 is metallic nickel or the material of the first reflective layer 131 coated on the inner wall of the main body 13 is metallic nickel, and the acoustic impedance of the purified water is z1=1.5x10 6 Rayleigh, the acoustic impedance of the metallic nickel is z2=53×10 6 Rayleigh due to Z2>>Z1(Z2/Z1>>5) It is considered that the ultrasonic wave is totally reflected on the inner wall of the main body 13 without being absorbed during the transmission in the main body 13.
It will be appreciated that when the ratio of the material impedance of the first reflective layer 131 to the material impedance of the therapeutic wave transmission medium is in the range of 2 to 10, it is sufficient that the therapeutic wave transmitted in the therapeutic wave transmission medium of the material is reflected by the first reflective layer having the material to form total reflection.
In order to enable the therapeutic wave to be further totally reflected when transmitted within the body portion 13 to reduce energy loss, the wall thickness of the body portion 13 and the wavelength of the therapeutic wave when transmitted in the wall of the body portion 13 satisfy the following relation:
D＝n*λ/4，
wherein D is the wall thickness of the main body 13;
n is an odd number;
λ is the wavelength of the therapeutic wave as it propagates in the wall of the body portion 13.
Specifically, the therapeutic wave is exemplified by the ultrasonic wave, and in order to further cause the ultrasonic wave to form total reflection when transmitted in the main body portion 13, the wall thickness of the main body portion 13 is designed to be an odd number times of 1/4 of the wavelength of the ultrasonic wave when transmitted in the material of the main body portion 13. For example, the material of the main body 13 is metallic nickel, and the wavelength of the ultrasonic wave when transmitted in the metallic nickel material is λ ', and then the wall thickness D ' =n×λ '/4 of the main body 13 can further enable the ultrasonic wave to form total reflection when transmitted in the main body 13, so that the energy loss of the ultrasonic wave is reduced, and the transmission efficiency of the ultrasonic wave is further improved.
In order to make the therapeutic wave more easily reflected when being transmitted in the main body 13 and to be able to transmit the therapeutic wave to the catheter outlet from the catheter inlet to the maximum, as shown in fig. 2 and 3, the first reflecting layer 131 includes a reflecting sheet 1311 having a tooth-like structure, and an included angle formed between the reflecting sheet 1311 and the inner wall of the main body 13 along a direction toward the catheter outlet is an acute angle.
The structure of the main body 13 shown in fig. 3 is a partial cross-sectional view of the main body 13 shown in fig. 2, and the reflection sheet 1311 provided on the main body 13 shown in fig. 3 is only a schematic view, and the shape of the reflection sheet 1311 and the distance between adjacent reflection sheets 1311 are also merely examples.
According to the reflection principle, when the reflecting sheets 1311 of the tooth-like structure formed on the inner wall of the main body 13 are all inclined toward the direction of the catheter outlet, the transmission direction of the therapeutic wave reflected by the reflecting sheets 1311 can be transmitted toward the direction of the catheter outlet when the therapeutic wave entering from the catheter inlet is incident on the reflecting sheets 1311, and it is understood that the direction toward the catheter outlet is the transmission direction shown in fig. 3, since the reflecting sheets 1311 on the inner wall of the main body 13 are all inclined toward the direction of the catheter outlet, the therapeutic wave entering from the catheter inlet is transmitted to the catheter outlet through multiple reflections of the reflecting sheets 1311, and it is understood that the included angle formed between the reflecting sheets 1311 and the inner wall of the main body 13 along the direction toward the catheter outlet is an acute angle so that the therapeutic wave entering from the catheter inlet can be transmitted to the catheter outlet to the maximum.
Preferably, the angle between the reflective sheet 1311 and the inner wall of the main body portion 13 in the direction towards the outlet of the duct is between 0 ° and 45 °.
As shown in fig. 3, the angle formed between the reflecting plate 1311 and the inner wall of the main body 13 in the direction toward the catheter outlet is α, and according to the reflection principle, the angle of α can ensure that the therapeutic wave is maximally transmitted from the catheter inlet to the catheter outlet when the angle is between 0 ° and 45 °.
As a specific embodiment of the first reflecting layer 131, the first reflecting layer 131 is integrally formed with the main body portion 13.
It is understood that the first reflective layer 131 is integrally formed with the main body portion 13, i.e., the first reflective layer 131 is formed as an inner wall of the main body portion 13. In the embodiment in which the first reflecting layer 131 is integrally formed with the main body 13, the main body 13 is made of a material capable of reflecting the therapeutic wave, and in this case, the first reflecting layer 131 does not need to be separately provided on the inner wall of the main body 13, but the inner wall of the main body 13 may be directly used as the first reflecting layer 131. This can simplify the manufacturing process of the reflection catheter 10.
Accordingly, when the first reflective layer 131 includes the reflective sheet 1311 of the tooth-like structure, as a specific embodiment of the reflective sheet 1311, the reflective sheet 1311 of the tooth-like structure is integrally formed with the inner wall of the main body 13, that is, the inner wall of the main body 13 is directly formed in the tooth-like structure, without providing the reflective sheet 1311 of the tooth-like structure separately on the inner wall of the main body 13.
As a specific embodiment of the material for manufacturing the first reflective layer 131, the material for manufacturing the first reflective layer 131 includes chromium or nickel.
It can be understood that, when the first reflective layer 131 is integrally formed with the main body 13, the main body 131 is made of metal nickel or metal chromium, and when the first reflective layer 131 is separately disposed on the inner wall of the main body 13, the material of the first reflective layer 131 is metal nickel or metal chromium, and the material of the main body 13 is not limited. It should be understood that the materials of construction of the body portion 131 described herein include chromium or nickel as examples only, and that the materials of construction of the body portion 131 may include not only chromium or nickel, but also other materials that can be used to reflect the therapeutic waves.
When the therapeutic beam irradiation device is used, it is sometimes necessary to bend the reflective catheter 10 to transmit the therapeutic wave to a target position to be treated, so in order to make the therapeutic wave reach the target position and minimize the loss of the therapeutic wave during transmission, as a specific embodiment of the main body 13, the main body 13 includes a straight portion 132 and at least one bending portion 133 connected to the straight portion 132, the straight portion 132 is connected to the inlet 11, a central angle corresponding to each bending portion 133 is smaller than 90 °, and a bending radius of each bending portion 133 is larger than a diameter of the main body 13.
It will be appreciated that, according to the reflection principle, when the central angle corresponding to the curved portion 133 is smaller than 90 °, it is ensured that the direction of the reflected therapeutic wave is directed towards the outlet of the catheter. Specifically, as shown in fig. 4, if the central angle corresponding to the curved portion 133 is a, a should be smaller than 90 °, and the curved portion 133 shown in fig. 4 has a radius of curvature R that is larger than the diameter of the main body portion 13. It should be understood that the bending may be achieved when the bending radius R is larger than the diameter of the main body 13, and of course, the specific size of the bending radius R is also related to the length of the main body 13, and may be determined according to the requirement of use, and is not strictly limited herein.
Preferably, the angle between the axis of the straight portion 132 and the tangent line of the curved portion 133 connected to the straight portion 132 at the intersection with the straight portion 132 is between 0 ° and 30 °.
Specifically, as shown in fig. 4, the angle between the curved portion 133 and the straight portion 132 is B, and B should be between 0 ° and 30 °. When the angle between the curved portion 133 and the straight portion 132 satisfies the above condition, it is possible to ensure that the transmission direction of the therapeutic wave is a direction toward the catheter outlet, and minimize the loss of the therapeutic wave during transmission.
In order to facilitate the reflection catheter 10 to collect the therapeutic waves, as shown in fig. 1 and 2, the inlet 11 has a truncated cone shape, and one end of the truncated cone-shaped inlet 11 having a small diameter is connected to the main body 13.
When the therapeutic wave transmitted by the therapeutic beam emitting device acts at a designated position, because a certain structural limitation exists at certain designated positions, the therapeutic wave cannot directly reach the designated positions, in order to make the therapeutic wave reach the limited designated positions to complete the therapeutic action, as shown in fig. 5, as a specific embodiment of the therapeutic beam emitting device, the therapeutic beam emitting device further includes a dispersing structure 14 and a refolding structure 15, the dispersing structure 14 is located at a catheter outlet of the reflective catheter 10, the dispersing structure 14 includes a plurality of dispersing walls, an outer wall of the dispersing walls is provided with a second reflective layer 141, the second reflective layer 141 can reflect the therapeutic wave transmitted to the catheter outlet, the refolding structure 15 is located at a catheter outlet of the reflective catheter 10 and is connected with the reflective catheter 10, the refolding structure 15 includes a plurality of refolding walls, the refolding walls are in one-to-one correspondence with the dispersing walls, and an inner wall of each refolding wall is disposed opposite to an outer wall of the dispersing walls, the inner wall of the refolding walls is provided with a third reflective layer 151 capable of reflecting the therapeutic wave to form a focus region, and the third reflective layer 151 can reflect the therapeutic wave to a focus region 18.
It will be understood that, as shown by the arrow in fig. 5, when the therapeutic wave is transmitted to the outlet of the catheter, the therapeutic wave continues to be transmitted to the dispersing structure 14 in the right direction as shown in the drawing, and the therapeutic wave is reflected by the second reflecting layer 141 disposed on the outer wall of the dispersing structure 14, and the reflected therapeutic wave is transmitted to the inner wall of the refolding structure 15, reflected by the third reflecting layer 151 disposed on the inner wall of the refolding structure 15, and the therapeutic wave reflected by the third reflecting layer 151 can be converged into the outlet focal region 18, where the outlet focal region 18 is the designated position on the area to be treated.
It will be further appreciated that fig. 5 is a schematic sectional view of the therapeutic beam emitting device, where the dispersing structure 14 includes a plurality of dispersing walls, and the refolding structure 15 includes a plurality of refolding walls, so that the dispersing structure 14 and the refolding structure 15 are polygonal structures.
By providing the dispersing structure 14 and the refocusing structure 15, the therapeutic wave transmitted to the outlet of the catheter can be changed in transmission path to reach the designated position of the region 16 to be treated to achieve the effect of the therapeutic wave. It should be appreciated that the dispersing structure 14 and the refocusing structure 15 need to be used in combination, i.e. to disperse and then refocus the focused therapeutic waves to alter the transmission path of the therapeutic waves.
It should be noted that the second reflective layer 141 may be integrally formed with the dispersing structure 14, and the material for manufacturing the second reflective layer 141 may be the same as that for manufacturing the first reflective layer 131 described above. Similarly, the third reflective layer 151 may be integrally formed with the refocusing structure 15, and the material of the third reflective layer 151 may be the same as that of the first reflective layer 131 described above.
It should be further noted that the number of the dispersing structures 14 and the refolding structures 15 included in the therapeutic beam emitting device is not limited to that shown in fig. 5, and may further include a plurality of dispersing structures 14 and refolding structures 15 according to needs, and the setting angles of the dispersing structures 14 and the refolding structures 15 are not limited to that shown in fig. 5, and the setting angles thereof may be adjusted according to needs, and the distance between the outlet focal region 18 and the catheter outlet may be changed by adjusting the inclination angle of the dispersing wall 141 of the dispersing structure 14.
Specifically, the focusing transducer 20 includes an ultrasonic wave generating device capable of emitting ultrasonic waves. It will be appreciated that as one specific application, the therapeutic waves emitted by the focusing transducer 20 are ultrasonic waves. The ultrasonic waves emitted by the focusing transducer 20 are converged into an inlet focus area 17 at the outlet position of the focusing transducer 20, the ultrasonic waves converged into the inlet focus area 17 enter the main body part 13 from the catheter inlet, and are transmitted to the catheter outlet through the main body part 13.
The working principle of the therapeutic beam emitting device will be described below by taking the ultrasonic wave emitted by the focusing transducer as an example.
The therapeutic beam emitting device provided by the invention utilizes the reflection catheter 10 to collect the focused ultrasonic waves emitted by the focusing transducer 20 and then transmit the focused ultrasonic waves out through the reflection catheter 10. The first reflecting layer 131 is provided on the inner wall of the reflecting duct 10, or the reflecting duct 10 itself is made of an ultrasonic wave reflecting material, which is transmitted from the duct inlet to the duct outlet of the reflecting duct 10 by reflection of the inner wall of the reflecting duct 10.
Specifically, the reflection catheter 10 is disposed at the position of the focused ultrasonic wave entrance focal region 17 of the focusing transducer 20, and the entrance focal region 17 is located within the reflection catheter 10. In order to enable the transmission of the ultrasonic waves within the body portion 13, the inner diameter of the body portion 13 is larger than the wavelength of the ultrasonic waves and the dimension of the focused ultrasonic wave inlet focal region 17 in a direction perpendicular to the transmission direction of the ultrasonic waves. In order to facilitate the collection of the ultrasonic waves, the inlet of the catheter is in a truncated cone shape and is used for collecting the ultrasonic waves. The inner wall of the main body 13 is coated with an ultrasonic wave reflecting layer or the main body 13 itself is made of a material that reflects ultrasonic waves. When the therapeutic beam irradiation device is in operation, focused ultrasonic waves output by the focusing transducer 20 are transmitted from the catheter inlet to the catheter outlet by reflection from the reflecting catheter 10.
In addition, when tissue structures which need to be preserved or not to be treated exist around the designated position, the ultrasonic waves transmitted to the outlet of the catheter can divide the conducted focused ultrasonic energy through the dispersing structure 14 and the refocusing structure 15, and enable the divided low-energy ultrasonic waves to penetrate through the corresponding tissue structures and refocus into high-energy ultrasonic wave focuses at the designated positions of the tissue structures.
The therapeutic beam irradiation device provided by the invention utilizes the characteristic of good directivity of ultrasonic waves when transmitting the ultrasonic waves, and uses the reflection catheter 10 to guide the ultrasonic waves from the position of the entrance focus area 17 to a designated position. The reflective catheter 10 is formed of or coated with an ultrasonic reflective material to reflect ultrasonic waves to the outlet. Because the reflection catheter 10 is flexible, the reflection catheter has a certain bending radius, but the circle center angle corresponding to the bending radius cannot exceed 90 degrees, so that the reflection of ultrasonic waves is not affected. The inner diameter of the reflecting catheter 10 is larger than the wavelength of the ultrasonic wave and the dimension of the inlet focal region 17 perpendicular to the transmission direction of the ultrasonic wave, and the ultrasonic wave is collected at the inlet of the catheter and can be reflected by the inner wall of the reflecting catheter 10 to be transmitted towards the outlet direction of the catheter.
When the therapeutic beam irradiation device is used, the catheter outlet of the reflective catheter 10 can be directly aligned to the target position to be treated.
Therefore, the therapeutic beam irradiation device provided by the invention can meet the requirement of ultrasonic waves on specific output points or specific output directions, and can be widely applied to industries such as industry, agriculture, medical treatment, sanitation and the like.
It is to be understood that the above embodiments are merely illustrative of the application of the principles of the present invention, but not in limitation thereof. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the invention, and are also considered to be within the scope of the invention.
Claims (13)
1. A therapeutic beam irradiation device comprising a focusing transducer for emitting therapeutic waves and capable of converging the emitted therapeutic waves into an inlet focal region, characterized in that the therapeutic beam irradiation device further comprises a reflecting catheter located at an output side of the focusing transducer such that the inlet focal region into which the therapeutic waves are converged is located within the reflecting catheter, the reflecting catheter comprising a catheter inlet and a catheter outlet, the reflecting catheter being for receiving a therapeutic wave transmission medium, and the reflecting catheter being capable of transmitting therapeutic waves entered from the catheter inlet to the catheter outlet;
the therapeutic beam irradiation device further comprises a dispersing structure and a refocusing structure,
the dispersing structure is positioned at the catheter outlet of the reflecting catheter, the dispersing structure comprises a plurality of dispersing walls, the outer walls of the dispersing walls are provided with second reflecting layers, the second reflecting layers can reflect the therapeutic waves transmitted to the catheter outlet,
the refocusing structure is located at the outlet of the reflecting catheter and connected with the reflecting catheter, the refocusing structure comprises a plurality of refocusing walls, the refocusing walls are in one-to-one correspondence with the dispersing walls, the inner walls of each refocusing wall are opposite to the outer walls of the dispersing walls, a third reflecting layer is arranged on the inner walls of the refocusing walls, and the third reflecting layer can reflect the therapeutic waves reflected by the second reflecting layer and then converge the therapeutic waves into an outlet focus area.
2. The therapeutic beam ejection device of claim 1, wherein the reflective catheter comprises an inlet portion, an outlet portion, and a body portion connecting the inlet portion and the outlet portion, the catheter inlet being formed on the inlet portion, the catheter outlet being formed on the outlet portion, the inlet portion having a caliber greater than an inner diameter of the body portion.
3. The therapeutic beam irradiation device of claim 2, wherein a first reflective layer is provided on an inner wall of the main body portion, the first reflective layer being capable of reflecting therapeutic waves entering the main body portion.
4. A therapeutic beam ejection device according to claim 3, wherein the inner diameter of the body portion is greater than the wavelength of the therapeutic wave as it is transmitted in the therapeutic wave transmission medium within the body portion.
5. A therapeutic beam irradiation device according to claim 3, wherein an inner diameter of said main body portion is larger than a dimension of said entrance focal region in a direction perpendicular to a transmission direction of said therapeutic wave.
6. A therapeutic beam irradiation device according to claim 3, wherein the wall thickness of said main body portion and the wavelength of said therapeutic wave as transmitted in the wall of said main body portion satisfy the following relation:
D＝n*λ/4，
wherein D is a wall thickness of the main body portion;
n is an odd number;
λ is the wavelength of the therapeutic wave as it propagates in the wall of the body portion.
7. A therapeutic beam device according to claim 3, wherein the first reflective layer comprises a reflective sheet having a tooth-like structure, the reflective sheet forming an acute included angle with the inner wall of the body portion in a direction toward the outlet of the catheter.
8. The therapeutic beam device of claim 7, wherein an angle between the reflective sheet and the inner wall of the body portion in a direction toward the catheter outlet is between 0 ° and 45 °.
9. The therapeutic beam device of claim 7, wherein the first reflective layer is integrally formed with the body portion.
10. The therapeutic beam device of claim 9, wherein the first reflective layer is made of a material comprising chromium or nickel.
11. The therapeutic beam irradiation device of any one of claims 2-10, wherein the body portion comprises a straight portion and at least one curved portion connected to the straight portion, the straight portion and the inlet portion are connected, each curved portion has a corresponding central angle of less than 90 ° and each curved portion has a radius of curvature greater than a diameter of the body portion.
12. The therapeutic beam device of claim 11, wherein an angle between an axis of the straight portion and a tangent to the curved portion connected to the straight portion at an intersection with the straight portion is between 0 ° and 30 °.
13. The therapeutic beam irradiation device of any one of claims 1 to 10, wherein the focusing transducer comprises an ultrasonic wave generating means capable of emitting ultrasonic waves.
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| CN201611263195.4A CN108261611B (en) | 2016-12-30 | 2016-12-30 | Therapeutic beam-emitting device |
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