CN114145713A - Double-frequency endoscopic catheter and imaging device - Google Patents
Double-frequency endoscopic catheter and imaging device Download PDFInfo
- Publication number
- CN114145713A CN114145713A CN202111447536.4A CN202111447536A CN114145713A CN 114145713 A CN114145713 A CN 114145713A CN 202111447536 A CN202111447536 A CN 202111447536A CN 114145713 A CN114145713 A CN 114145713A
- Authority
- CN
- China
- Prior art keywords
- catheter
- frequency
- ultrasonic transducer
- dual
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0073—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by tomography, i.e. reconstruction of 3D images from 2D projections
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0084—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for introduction into the body, e.g. by catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0891—Detecting organic movements or changes, e.g. tumours, cysts, swellings for diagnosis of blood vessels
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/12—Diagnosis using ultrasonic, sonic or infrasonic waves in body cavities or body tracts, e.g. by using catheters
Abstract
The invention provides a double-frequency endoscopic catheter and an imaging device.A set arrangement mode is adopted for placing two ultrasonic transducers in the catheter, the two ultrasonic transducers can simultaneously or delay transmit and receive ultrasonic pulses and can also independently transmit and receive the ultrasonic pulses, and high-quality ultrasonic double-frequency fusion images are provided by organically combining array elements with two resolution capabilities; and the matching layer of the double-frequency ultrasonic transducer is manufactured by utilizing three-layer or more than three-layer artificial matching layer structures designed by related theory and simulation and adopting a high-precision film coating mode, so that the output bandwidth and the response amplitude of the transducer are effectively improved.
Description
Technical Field
The invention relates to the technical field of medical device design, in particular to a double-frequency endoscopic catheter and an imaging device. The imaging device can be applied to the cardiovascular system and can also be applied to the auxiliary diagnosis in the upper and lower digestive tracts.
Background
The currently clinically common cardiovascular diagnosis techniques mainly include: computed Tomography (CT) and Magnetic Resonance Imaging (MRI), but more precise Imaging devices are required for the assessment of coronary artery disease and for the guidance of percutaneous coronary intervention.
Intravascular optical coherence Tomography (IVOCT) combines endoscope and laparoscope technologies on the basis of the traditional OCT, and can provide higher-resolution Tomography, thereby improving the accuracy of cardiovascular disease diagnosis; however, OCT optical imaging can reduce imaging depth due to the high light absorption and scattering properties of soft tissue. Secondly, additional surgical risks are added due to the necessary blood flushing steps.
Intravascular Ultrasound (IVUS) has been widely used for imaging of cardiovascular diseases based on atherosclerosis and coronary stents.
However, the ultrasound transducer of a conventional IVUS imaging catheter is fixed in frequency, ranging from 20MHz to 40MHz, and thus can only provide a certain axial resolution, lateral resolution, and imaging depth; because the single-frequency IVUS catheter compromises the imaging resolution and the imaging depth, fine structures such as a cardiovascular wall fiber cap (the size is about 65 um) and the like cannot be distinguished, the imaging capability of the single-frequency IVUS catheter on cardiovascular structures and tiny plaques is limited, and therefore multi-level accurate diagnosis on pathological tissues is difficult to carry out.
In recent years, southern california university, usa, developed a multi-modal catheter for cardiovascular endoscopic imaging, with ultrasound transducers for large depth imaging while optical coherence tomography is used for high resolution imaging.
However, optical coherence tomography also sacrifices imaging depth while providing resolution imaging, and also has to incorporate flushing devices; moreover, these researches adopt a multi-system coupling mode, so that the device is more complicated, and the cost for obtaining high-quality images is greatly increased.
Disclosure of Invention
In view of the above, in order to solve the above problems, the present invention provides a dual-frequency endoscopic catheter and an imaging device, wherein the technical solution is as follows:
a dual-frequency endoscopic catheter, the dual-frequency endoscopic catheter comprising:
a housing;
the driving part is positioned on one side of the shell and is used for driving the shell to rotate;
the side wall of the shell is provided with an opening area;
the first ultrasonic transducer and the second ultrasonic transducer are positioned in the opening area and are sequentially arranged along a first direction;
wherein the first direction is the same as a length extension direction of the housing.
Preferably, in the dual-frequency endoscopic catheter, the frequency of the first ultrasonic transducer is less than or equal to 40 MHz;
the frequency of the second ultrasonic transducer is greater than 40 MHz.
Preferably, in the above-described dual-frequency endoscopic catheter, the dual-frequency endoscopic catheter further includes:
the base is positioned in the opening area and is fixedly connected with the shell;
the first ultrasonic transducer and the second ultrasonic transducer are fixed on the base.
Preferably, in the dual-frequency endoscopic catheter, a side of the housing facing away from the driving member is bullet-shaped.
Preferably, in the dual-frequency endoscopic catheter, the driving member is a torque coil;
the number of coil layers of the moment coil is at least two.
Preferably, in the above-described dual-frequency endoscopic catheter, the dual-frequency endoscopic catheter further includes:
a first coaxial cable connected to the first ultrasonic transducer;
a second coaxial cable connected to the second ultrasonic transducer.
Preferably, in the dual-frequency endoscopic catheter, the first ultrasonic transducer and the second ultrasonic transducer have the same structure, and the dual-frequency endoscopic catheter includes:
a backing layer;
in a second direction, a first electrode layer, a piezoelectric layer, a second electrode layer and at least three acoustic artificial matching laminated layers are sequentially stacked on one side of the backing layer;
wherein the second direction is perpendicular to the backing layer and is directed from the backing layer to the first electrode layer.
Preferably, in the dual-frequency endoscopic catheter described above, the first ultrasonic transducer and the second ultrasonic transducer have the same structure, and further include:
the conductive layer is positioned on one side, away from the piezoelectric layer, of the second electrode layer;
the conductive layer is disposed proximate to the second electrode layer.
Preferably, in the dual-frequency endoscopic catheter, a groove is formed in a side of the backing layer facing away from the first electrode layer.
An imaging apparatus, comprising: the device comprises a rotary withdrawing control module, a data acquisition module, an ultrasonic catheter component and an upper computer;
the rotary withdrawing control module is in communication connection with the data acquisition module;
the data acquisition module is in communication connection with the upper computer;
the ultrasound catheter component includes: a proximal end drive slot, a catheter sheath and the dual-frequency endoscopic catheter of any of the above;
one end of the near-end driving groove is connected with the rotary retraction control module, and the other end of the near-end driving groove is connected with one end of the catheter sheath;
the double-frequency endoscopic catheter is positioned in the catheter sheath.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a double-frequency endoscopic catheter, comprising: a housing; the driving part is positioned on one side of the shell and is used for driving the shell to rotate; the side wall of the shell is provided with an opening area; the first ultrasonic transducer and the second ultrasonic transducer are positioned in the opening area and are sequentially arranged along a first direction; wherein the first direction is the same as a length extension direction of the housing.
The double-frequency endoscopic catheter places two ultrasonic transducers in the catheter in a set arrangement mode, the two transducers can simultaneously or delay transmit and receive ultrasonic pulses and can also independently transmit and receive the ultrasonic pulses, and high-quality ultrasonic double-frequency fusion images are provided by organically combining array elements with two resolution capabilities.
The matching layer of the double-frequency ultrasonic transducer is manufactured by utilizing three-layer or more than three-layer artificial matching layer structures designed by related theory and simulation and adopting a high-precision film coating mode, so that the output bandwidth and the response amplitude of the transducer are effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an imaging device according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an ultrasound catheter component provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic structural view of a guidewire lumen with a guidewire disposed therein according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a dual-frequency endoscopic catheter according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an ultrasonic transducer according to an embodiment of the present invention;
fig. 6 is a schematic connection diagram corresponding to the ultrasonic transducer structure shown in fig. 5 according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of another ultrasonic transducer provided in an embodiment of the present invention;
fig. 8 is a schematic connection diagram corresponding to the ultrasonic transducer structure shown in fig. 7 according to an embodiment of the present invention;
fig. 9 is a schematic flow chart of a method for manufacturing a dual-frequency endoscopic catheter according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Based on the content recorded in the background art, in the process of the invention and creation of the present application, the inventor finds that, compared with the traditional single-array-element ultrasonic endoscopic catheter, the design and assembly process of the dual-frequency ultrasonic endoscopic catheter has been a great bottleneck restricting the development of the endoscopic ultrasonic imaging technology due to the two ultrasonic transducers with different frequencies.
The matching layer of the ultrasonic transducer is mostly matched by adopting a traditional single layer or double layers, and acoustic impedance matching is not well guaranteed, so that the output bandwidth and amplitude response of the ultrasonic transducer are not high enough.
In addition, the frequency of the ultrasonic endoscopic catheter of a single transducer is fixed and single, the imaging resolution of the high-frequency ultrasonic endoscopic catheter is high but the imaging depth is shallow, and the imaging depth of the low-frequency ultrasonic endoscopic catheter is deep but the resolution is greatly reduced, so that the development of ultrasonic images to high-resolution high-imaging depth is restricted.
Meanwhile, the ultrasonic endoscopic catheter with a single transducer is difficult to complete the research of functional ultrasonic imaging such as elastography, and the development of the ultrasonic endoscopic catheter towards more diversification is restricted.
Based on this, in this application, two ultrasonic transducers are placed in the catheter side by side at the same side, and the two transducers can transmit and receive ultrasonic pulses simultaneously or in a delayed manner, or can transmit and receive ultrasonic pulses separately, so that high-quality ultrasonic images can be provided by organically combining array elements with two resolving powers.
Furthermore, the matching layer of the double-frequency ultrasonic transducer is manufactured by utilizing three-layer and more than three-layer artificial matching layer structures designed by correlation theory and simulation and adopting a high-precision film coating mode, so that the output bandwidth and the response amplitude of the transducer are effectively improved.
Generally speaking, the technical scheme provided by the application utilizes the ultrasonic dual-frequency array element to perform ultrasonic endoscopic elastography, can realize the combination of ultrasonic imaging and ultrasonic functional imaging, and provides more reliable basis for clinical diagnosis.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an imaging device according to an embodiment of the present invention.
The image forming apparatus includes: a rotary retraction control module 11, a data acquisition module 12, an ultrasonic catheter component 13 and an upper computer 14.
The rotary withdrawing control module 11 is in communication connection with the data acquisition module 12.
The data acquisition module 12 is in communication connection with the upper computer 14.
Specifically, the rotary retraction control module 11 mainly includes: the motor and the control module for controlling the working state of the motor.
Optionally, the motor at least comprises a rotating motor and a retracting motor.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an ultrasound catheter component according to an embodiment of the present invention.
The ultrasound catheter component includes: a proximal drive channel 131, a catheter sheath 132, and a dual-frequency endoscopic catheter 133 as described in the embodiments of the present application described below.
The proximal drive channel 131 is connected to the rotational retraction control module 11 at one end and to the catheter sheath 132 at the other end.
The dual-frequency endoscopic catheter 133 is positioned within the catheter sheath 132.
Wherein, as shown in fig. 2, the ultrasonic catheter part 13 further includes: a withdrawal anchor block 134 on the catheter sheath 132, and a guidewire lumen 135 distal from the proximal drive channel 131.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a guidewire lumen according to an embodiment of the present invention, in which a guidewire is pre-threaded during a surgical procedure in the guidewire lumen 135.
In this embodiment, the proximal driving slot 131 is fixedly connected to the rotating motor of the rotating retraction control module 11, and further connected to the retraction member of the rotating retraction control module 11, and the retraction fixing block 134 is stationary during retraction.
In the embodiment of the present application, the distance that can be retracted more than 150mm is taken as an example for explanation.
As shown in fig. 2, the proximal driving groove 131 is further configured with an injection cavity 136 for providing a coupling environment for the ultrasound transducer in the dual-frequency endoscopic catheter 133 and evacuating air in the catheter sheath by injecting physiological saline.
Optionally, the catheter sheath 132 and the guidewire lumen 135 are made of biocompatible materials.
Optionally, the catheter sheath 132 is divided into a portion proximal to the proximal drive channel 131 and a portion proximal to the guidewire lumen 135; wherein the portion of the sheath 132 adjacent to the proximal drive channel 131 may be a rigid, non-transparent, high acoustic impedance sheath 132, and the portion of the sheath 132 adjacent to the guidewire lumen 135 may be a flexible, transparent, low acoustic impedance sheath 132 that serves as an imaging window.
Optionally, the length of the non-transparent portion of the catheter sheath 132 is greater than 1m and the length of the imaging window is greater than 150 mm.
In one embodiment of the invention, the length of the imaging window is matched to the maximum distance of the retraction distance.
For example, the maximum distance of the retraction distance is 300mm, and then the length of the imaging window is also set to 300 mm.
Further, in an embodiment of the present invention, a graduation mark may be provided on the catheter sheath 132 between the fixed retraction block 134 and the proximal driving groove 131 to measure the retraction distance, and a digital display plate for the retraction distance is provided on the rotary retraction module to correct the non-uniform distortion caused by the movement of the catheter by a rigid correction algorithm to provide a more accurate ultrasonic endoscopic image.
Optionally, in another embodiment of the present invention, referring to fig. 4, fig. 4 is a schematic structural diagram of a dual-frequency endoscopic catheter according to an embodiment of the present invention.
The dual-frequency endoscopic catheter comprises:
a housing 15.
And the driving part 16 is positioned on one side of the shell 15, and the driving part 16 is used for driving the shell 15 to rotate.
The side wall of the housing 15 has an open area.
And a first ultrasonic transducer 17 and a second ultrasonic transducer 18 which are positioned in the opening region and are sequentially arranged along a first direction. Optionally, the first ultrasonic transducer 17 and the second ultrasonic transducer 18 may be disposed side by side (i.e., longitudinally arranged) on the same side, or disposed in parallel (i.e., transversely arranged) on the same side, or disposed side by side (i.e., longitudinally staggered back-to-back), or disposed back-to-back on different sides, or the like.
Wherein the first direction is the same as the direction of the length extension of the housing 15.
In this embodiment, the housing 15 is used to carry the first and second ultrasonic transducers 17 and 18 and to protect the first and second ultrasonic transducers 17 and 18.
Wherein the side of the housing 15 facing away from the driving part 16 is bullet-shaped, and the length of the housing is extremely short, and the design of the short bullet-shaped can remarkably reduce the non-uniform distortion of the catheter during bending and withdrawing.
Optionally, the material of the housing 15 includes, but is not limited to, a biocompatible metal material or a non-metal material, and has a high strength, so that the housing is strong and durable to improve the service life thereof.
Optionally, as shown in fig. 4, the dual-frequency endoscopic catheter further includes:
a base 19 located in the opening area, and the base 19 is fixedly connected with the housing 15.
The first ultrasonic transducer 17 and the second ultrasonic transducer 18 are fixed to the base 19.
Specifically, the first ultrasonic transducer 17 and the second ultrasonic transducer 18 are fixed inside the housing 15 by a base 19.
The first ultrasonic transducer 17 and the second ultrasonic transducer 18 include but are not limited to being fixed on the base 19 by using a biocompatible glue, and the biocompatible glue can also serve as an isolation and insulation function.
Wherein, the design of the base 19 can greatly improve the coaxiality and coplanarity of the first ultrasonic transducer 17 and the second ultrasonic transducer 18.
Alternatively, the material of the base 19 includes, but is not limited to, a biocompatible non-metallic material (insulating material).
Optionally, the frequency of the first ultrasonic transducer 17 is less than or equal to 40 MHz; the frequency of the second ultrasonic transducer 18 is greater than 40 MHz.
That is, in the embodiment of the present application, two ultrasonic transducers with different frequencies are taken as an example for explanation, wherein the first ultrasonic transducer 17 is a low-frequency ultrasonic transducer, and the second ultrasonic transducer 18 is a high-frequency ultrasonic transducer.
Alternatively, as shown in fig. 4, the drive member 16 is a torque coil.
The number of coil layers of the moment coil is at least two, and preferably three or more.
The housing 15 and the torque coil 16 are connected and fixed by means of, but not limited to, biocompatible glue, conductive silver glue, or laser welding, and the torque coil is used for transmitting torque generated by the rotating electrical machine.
In the embodiment of the application, the number of the coil layers of the moment coil is at least three, so that the moment coil can rotate clockwise or anticlockwise, and has excellent bending performance, anti-shaking performance and safety performance.
Wherein the dual-frequency endoscopic catheter is placed in the catheter sheath, and the area where the first ultrasonic transducer 17 and the second ultrasonic transducer 18 are located corresponds to the imaging window of the catheter sheath.
Optionally, as shown in fig. 4, the dual-frequency endoscopic catheter further includes:
a first coaxial cable 20 connected to the first ultrasonic transducer 17.
A second coaxial cable 21 connected to the second ultrasonic transducer 18.
The first coaxial cable 20 and the second coaxial cable 21 are respectively connected with the first ultrasonic transducer 17, the second ultrasonic transducer 18 and the like through the hollow area of the moment coil.
When the double-frequency endoscopic catheter works, the catheter sheath, the guide wire cavity and the guide wire are kept static, and the double-frequency endoscopic catheter rotates and/or retracts.
Optionally, in another embodiment of the present invention, referring to fig. 5, fig. 5 is a schematic structural diagram of an ultrasound transducer provided in an embodiment of the present invention.
The first ultrasonic transducer 17 and the second ultrasonic transducer 18 are identical in structure and include:
backing layer 22.
In the second direction, a first electrode layer 23, a piezoelectric layer 24, a second electrode layer 25, and at least three acoustic artificial matching laminated layers 26 stacked in this order are located in this order on the backing layer 22 side.
Wherein the second direction is perpendicular to the backing layer 22 and is directed from the backing layer 22 to the first electrode layer 23.
In this embodiment, development of the first ultrasonic transducer 17 and the second ultrasonic transducer 18 is performed using one or more of a piezoelectric single crystal material or a piezoelectric single crystal composite material (e.g., a PMN-PT single crystal material) having superior piezoelectric, i.e., dielectric properties.
Optionally, the backing layer 22 of the first ultrasonic transducer 17 and the backing layer 22 of the second ultrasonic transducer 18 are made of a material with high sound absorption performance (such as E-Solder 3022 or tungsten steel), so as to further reduce the thickness of the array elements of the first ultrasonic transducer 17 and the second ultrasonic transducer 18, so that the outer diameter of the dual-frequency endoscopic catheter is about 0.2mm to 10mm, and the dual-frequency endoscopic catheter is more convenient to enter a narrow and deep cardiovascular structure for endoscopic imaging.
The material of the first electrode layer 23 includes, but is not limited to, Cr/Au material. (the electrode layer is plated with nickel and chromium firstly and then plated with gold, so that the electrode is firmer).
The material of the second electrode layer 25 includes, but is not limited to, a Cr/Au material.
Optionally, the at least three sequentially stacked acoustic artificial matching stacks 26 include a first acoustic artificial matching layer a1 and a second acoustic artificial matching layer a2 sequentially stacked and disposed in the second direction; at least three layers of sequentially stacked acoustic artificial matching stacks 26 are formed by sequentially stacking the first acoustic artificial matching layer a1 and the second acoustic artificial matching layer a2 in the second direction.
Alternatively, the material of the first acoustic artificial matching layer a1 may be a polymer material, such as parylene or the like.
Alternatively, the material of the second acoustic artificial matching layer a2 may be a polymer material or a metal material, such as a metal material like gold.
Optionally, the piezoelectric layer 24 may be made of piezoelectric ceramic, a piezoelectric ceramic composite material, a piezoelectric single crystal material, or a piezoelectric single crystal composite material.
Optionally, a groove 27 is formed in a side of the backing layer 22 facing away from the first electrode layer 23.
Further, referring to fig. 6, fig. 6 is a schematic connection diagram corresponding to the ultrasonic transducer structure shown in fig. 5 according to an embodiment of the present invention.
Wherein the coaxial cable is connected with the second electrode layer.
Alternatively, in another embodiment of the present invention, referring to fig. 7, fig. 7 is a schematic structural diagram of another ultrasound transducer provided in the embodiment of the present invention.
The first ultrasonic transducer 17 and the second ultrasonic transducer 18 have the same structure, and further include:
a conductive layer 28 on the side of the second electrode layer 25 facing away from the piezoelectric layer 24;
the conductive layer 28 is arranged in close proximity to the second electrode layer 25.
In this embodiment, on the basis of the ultrasonic transducer structure shown in fig. 5, a conductive layer 28 may also be formed on the side of the second electrode layer 25 facing away from the piezoelectric layer 24.
Optionally, the material of the conductive layer 28 includes, but is not limited to, a metal material such as gold.
Further, referring to fig. 8, fig. 8 is a schematic connection diagram corresponding to the ultrasonic transducer structure shown in fig. 7 according to an embodiment of the present invention.
Wherein the conductive layer 28 is connected to the metal shell which is connected to the shield end of the coaxial cable.
It should be noted that in fig. 5-8, the acoustic artificial matching stack 26 is illustrated by taking the number of three film layers as an example.
According to the description, the first ultrasonic transducer and the second ultrasonic transducer are manufactured by combining three or more than three layers of acoustic artificial matching laminated layers combined with theory and simulation, so that the integrated integration of the double-frequency multi-scale imaging catheter with higher resolution, higher signal-to-noise ratio and higher sensitivity is realized; the connection of the positive electrode and the negative electrode of the first ultrasonic transducer and the second ultrasonic transducer is realized through two connection modes of fig. 6 and fig. 8.
Alternatively, the following briefly explains the manufacturing process of the dual-frequency endoscopic catheter provided according to the above embodiment of the present invention, which is merely an example to be described:
referring to fig. 9, fig. 9 is a schematic flow chart illustrating a method for manufacturing a dual-frequency endoscopic catheter according to an embodiment of the present invention.
S101: the thickness of each piezoelectric layer, each acoustic artificial matching layer and each ultrasonic transducer size are determined by Piezo CAD simulation.
S102: and respectively polishing and grinding the piezoelectric materials to the thickness calculated by simulation.
S103: and respectively arranging nickel-chromium/gold electrode materials on the front surface and the rear surface of the polished piezoelectric material by using a magnetron sputtering instrument.
S104: and cutting the double-frequency array elements to the size of the simulation design by using a precision diamond cutting machine.
S105: and the array elements are connected by utilizing an E-Solder 3022 material, and the dual-frequency array elements are arranged on the base by utilizing an Epo-Tek301 epoxy resin material and are packaged in the shell.
S106: and arranging a plurality of layers of acoustic artificial matching layer materials on the forward acoustic radiation surface of the array element.
It should be noted that, because the thicknesses of the two array element matching layers are not consistent, manual shielding processing needs to be performed on the array elements with low requirements on thickness. (for FIG. 8)
Because the thicknesses of the two array element matching layers are different, the two different array elements are respectively processed by plating artificial acoustic structures and then assembled into the shell so as to obtain the best acoustic matching. (for FIG. 6)
The above detailed description of the dual-frequency endoscopic catheter and the imaging device provided by the present invention is provided, and the principle and the embodiments of the present invention are described herein by using specific examples, and the above descriptions of the examples are only used to help understanding the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include or include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A dual-frequency endoscopic catheter, comprising:
a housing;
the driving part is positioned on one side of the shell and is used for driving the shell to rotate;
the side wall of the shell is provided with an opening area;
the first ultrasonic transducer and the second ultrasonic transducer are positioned in the opening area and are sequentially arranged along a first direction;
wherein the first direction is the same as a length extension direction of the housing.
2. The dual-frequency endoscopic catheter of claim 1, wherein the frequency of the first ultrasonic transducer is less than or equal to 40 MHz;
the frequency of the second ultrasonic transducer is greater than 40 MHz.
3. The dual-frequency endoscopic catheter of claim 1, further comprising:
the base is positioned in the opening area and is fixedly connected with the shell;
the first ultrasonic transducer and the second ultrasonic transducer are fixed on the base.
4. The dual-frequency endoscopic catheter of claim 1, wherein a side of said housing facing away from said drive member is bullet-shaped.
5. The dual-frequency endoscopic catheter of claim 1, wherein said drive member is a torque coil;
the number of coil layers of the moment coil is at least two.
6. The dual-frequency endoscopic catheter of claim 1, further comprising:
a first coaxial cable connected to the first ultrasonic transducer;
a second coaxial cable connected to the second ultrasonic transducer.
7. The dual-frequency endoscopic catheter of claim 1, wherein the first and second ultrasound transducers are structurally identical, comprising:
a backing layer;
in a second direction, a first electrode layer, a piezoelectric layer, a second electrode layer and at least three acoustic artificial matching laminated layers are sequentially stacked on one side of the backing layer;
wherein the second direction is perpendicular to the backing layer and is directed from the backing layer to the first electrode layer.
8. The dual-frequency endoscopic catheter of claim 7, wherein the first and second ultrasound transducers are structurally identical, further comprising:
the conductive layer is positioned on one side, away from the piezoelectric layer, of the second electrode layer;
the conductive layer is disposed proximate to the second electrode layer.
9. The dual-frequency endoscopic catheter of claim 7, wherein a side of the backing layer facing away from the first electrode layer is grooved.
10. An image forming apparatus, characterized in that the image forming apparatus comprises: the device comprises a rotary withdrawing control module, a data acquisition module, an ultrasonic catheter component and an upper computer;
the rotary withdrawing control module is in communication connection with the data acquisition module;
the data acquisition module is in communication connection with the upper computer;
the ultrasound catheter component includes: a proximal drive slot, a catheter sheath, and the dual-frequency endoscopic catheter of any of claims 1-9;
one end of the near-end driving groove is connected with the rotary retraction control module, and the other end of the near-end driving groove is connected with one end of the catheter sheath;
the double-frequency endoscopic catheter is positioned in the catheter sheath.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111447536.4A CN114145713A (en) | 2021-11-30 | 2021-11-30 | Double-frequency endoscopic catheter and imaging device |
| PCT/CN2021/138045 WO2023097784A1 (en) | 2021-11-30 | 2021-12-14 | Dual-frequency endoscopic catheter and imaging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111447536.4A CN114145713A (en) | 2021-11-30 | 2021-11-30 | Double-frequency endoscopic catheter and imaging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114145713A true CN114145713A (en) | 2022-03-08 |
Family
ID=80455383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111447536.4A Pending CN114145713A (en) | 2021-11-30 | 2021-11-30 | Double-frequency endoscopic catheter and imaging device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114145713A (en) |
| WO (1) | WO2023097784A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115177292A (en) * | 2022-09-09 | 2022-10-14 | 深圳皓影医疗科技有限公司 | Imaging detection device for medical diagnosis |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965232A (en) * | 2008-01-09 | 2011-02-02 | 海浪科技有限公司 | Multiple frequency band acoustic transducer arrays |
| CN102371243A (en) * | 2010-07-09 | 2012-03-14 | 通用电气公司 | Thermal transfer and acoustic matching layers for ultrasound transducer |
| CN203508355U (en) * | 2013-05-23 | 2014-04-02 | 深圳深超换能器有限公司 | Phased array transducer |
| CN104271265A (en) * | 2012-05-01 | 2015-01-07 | 富士胶片戴麦提克斯公司 | Multi-frequency ultra wide bandwidth transducer |
| CN107736900A (en) * | 2017-11-09 | 2018-02-27 | 深圳先进技术研究院 | A kind of dual transducers intravascular ultrasound imaging device |
| CN108272469A (en) * | 2017-12-22 | 2018-07-13 | 深圳先进技术研究院 | A kind of bifrequency intravascular ultrasound imaging probe |
| CN108291963A (en) * | 2015-11-24 | 2018-07-17 | 皇家飞利浦有限公司 | Ultrasonic system with the microbeamformers for different transducer arrays |
| CN110279434A (en) * | 2019-06-19 | 2019-09-27 | 天津大学 | A kind of rotary multifrequency intravascular ultrasound imaging probe of multi-mode mechanical |
| CN211511858U (en) * | 2018-07-25 | 2020-09-18 | 天津恒宇医疗科技有限公司 | Optical ultrasonic double-catheter endoscopic imaging system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2445322B (en) * | 2004-08-13 | 2008-08-06 | Stichting Tech Wetenschapp | Intravasular ultrasound techniques |
| CN204468134U (en) * | 2015-01-21 | 2015-07-15 | 上海爱声生物医疗科技有限公司 | There is double-frequency single, many array element IVUS transducer |
| GB2539368A (en) * | 2015-02-09 | 2016-12-21 | Univ Erasmus Med Ct Rotterdam | Intravascular photoacoustic imaging |
| US11576652B2 (en) * | 2017-07-28 | 2023-02-14 | Philips Image Guided Therapy Corporation | Intraluminal imaging devices with multiple center frequencies |
| CN110141268A (en) * | 2019-05-07 | 2019-08-20 | 天津大学 | A kind of machinery rotating type double frequency intravascular ultrasound radiant force elastic imaging probe |
-
2021
- 2021-11-30 CN CN202111447536.4A patent/CN114145713A/en active Pending
- 2021-12-14 WO PCT/CN2021/138045 patent/WO2023097784A1/en unknown
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101965232A (en) * | 2008-01-09 | 2011-02-02 | 海浪科技有限公司 | Multiple frequency band acoustic transducer arrays |
| CN102371243A (en) * | 2010-07-09 | 2012-03-14 | 通用电气公司 | Thermal transfer and acoustic matching layers for ultrasound transducer |
| CN104271265A (en) * | 2012-05-01 | 2015-01-07 | 富士胶片戴麦提克斯公司 | Multi-frequency ultra wide bandwidth transducer |
| CN203508355U (en) * | 2013-05-23 | 2014-04-02 | 深圳深超换能器有限公司 | Phased array transducer |
| CN108291963A (en) * | 2015-11-24 | 2018-07-17 | 皇家飞利浦有限公司 | Ultrasonic system with the microbeamformers for different transducer arrays |
| CN107736900A (en) * | 2017-11-09 | 2018-02-27 | 深圳先进技术研究院 | A kind of dual transducers intravascular ultrasound imaging device |
| CN108272469A (en) * | 2017-12-22 | 2018-07-13 | 深圳先进技术研究院 | A kind of bifrequency intravascular ultrasound imaging probe |
| CN211511858U (en) * | 2018-07-25 | 2020-09-18 | 天津恒宇医疗科技有限公司 | Optical ultrasonic double-catheter endoscopic imaging system |
| CN110279434A (en) * | 2019-06-19 | 2019-09-27 | 天津大学 | A kind of rotary multifrequency intravascular ultrasound imaging probe of multi-mode mechanical |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115177292A (en) * | 2022-09-09 | 2022-10-14 | 深圳皓影医疗科技有限公司 | Imaging detection device for medical diagnosis |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023097784A1 (en) | 2023-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220022845A1 (en) | Focused rotational ivus transducer using single crystal composite material | |
| US20230031859A1 (en) | Rotational intravascular ultrasound probe and method of manufacturing same | |
| JP6584467B2 (en) | Photo-acoustic imaging device | |
| JP6068572B2 (en) | Imaging probe having imaging means combining ultrasound and optics | |
| US20210282746A1 (en) | Intravascular imaging devices having a low reverberation housing and associated systems and methods | |
| CN114145713A (en) | Double-frequency endoscopic catheter and imaging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |