An intravascular ultrasound diagnostic system

Abstract

The present application provides an intravascular ultrasound diagnostic system, which transmits an electric pulse corresponding to an ultrasonic frequency at an external part, and after an internal part receives the electric pulse, a high-frequency resonance transceiver unit generates a corresponding excitation pulse so that an ultrasonic transducer generates an ultrasonic wave, and then the ultrasonic transducer generates a corresponding ultrasonic echo signal. The high-frequency resonance transceiver unit of the internal part receives the electric signal corresponding to the ultrasonic echo signal returned from the internal part, so that the external part receives the electric signal, thereby realizing wireless transmission of signals, avoiding problems such as signal attenuation, signal interference and line delay, improving signal reception strength and thereby improving imaging effects and improving user experience.

Description

Technical Field

[0001] The present application relates to the technical field of intravascular ultrasonic diagnosis, and in particular to an intravascular ultrasonic diagnosis system. Background Art

[0002] The invention of intravascular ultrasound (IVUS) technology has brought unprecedented convenience and speed to the diagnosis and treatment of cardiovascular diseases, greatly improved the accuracy of the judgment of the degree and nature of cardiovascular stenosis, and provided more detailed and reliable data parameters for the conventional stent repair treatment plan. In particular, the advantages in the composition of the vulnerable plates in the blood vessels and the severity of atherosclerosis are in-depth effects that other diagnostic technologies cannot achieve.

[0003] The ultrasonic transducer in the blood vessel uses a 1.6-meter-long metal steel wire hose as the driving shaft, which is inserted into the blood vessels in the body from the lower limbs and extends through the blood vessels to the proximal part. At the end outside the body, a motor is used to drive the soft wire driving shaft to rotate, and the soft wire driving shaft transmits the rotation to the ultrasonic transducer at the other end proximal to the center, driving the transducer to rotate. At the same time, another motor drives the driving shaft to do a retraction action. The entire rotating part of the intravascular ultrasonic diagnostic system has a complex process and poor reliability. In addition, due to the long catheter, the use of the wire in the catheter to transmit the signal is prone to long-distance loss and line delay of the high-frequency signal, which greatly weakens the signal and affects the real lesion signal effect; through long-distance wire transmission, the weak ultrasonic echo signal is easily interfered.

[0004] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Summary of the invention

[0005] The purpose of this application is to provide an intravascular ultrasound diagnostic system that can improve the signal reception strength and thus improve the imaging effect. The specific scheme is as follows:

[0006] The present application provides an intravascular ultrasound diagnostic system, comprising an internal part and an external part; the external part is placed outside the diagnosed body, and comprises:

[0007] A positioning unit, used to determine the relative position of the external part and the internal part;

[0008] An alternating magnetic field generating unit, used to generate an alternating magnetic field corresponding to the rotation speed of the ultrasonic transducer;

[0009] A high-frequency pulse transceiver unit, used for transmitting electric pulses corresponding to the ultrasonic frequency to the internal body part, and receiving electric signals corresponding to the ultrasonic echo signals returned from the internal body part;

[0010] The internal body part is placed in a blood vessel of the diagnosed body, and comprises:

[0011] A high-frequency resonance transceiver unit, used for generating a corresponding excitation pulse according to the electrical pulse received from the external part, for converting the ultrasonic echo signal into the electrical signal, and transmitting it to the external part;

[0012] An ultrasonic transducer, used for generating ultrasonic waves according to the excitation pulse, and for generating the corresponding ultrasonic echo signal according to the received ultrasonic echo reflected by the blood vessel wall;

[0013] A magnetic drive unit, used for rotating in the alternating magnetic field and driving the ultrasonic transducer to rotate synchronously;

[0014] The catheter assembly is used to accommodate and install the high-frequency resonance transceiver unit, the ultrasonic transducer, and the magnetic drive unit so that the ultrasonic transducer and the magnetic drive unit rotate synchronously.

[0015] Optionally, the catheter assembly comprises:

[0016] The positioning device is used to fix the ultrasonic transducer and the magnetic drive unit so that the positioning device rotates synchronously with the magnetic drive unit and the ultrasonic transducer, so that the ultrasonic transducer can realize circular scanning during rotation.

[0017] Optionally, the ultrasonic transducer rotates synchronously with the high-frequency resonance transceiver unit.

[0018] Optionally, the ultrasonic transducer comprises:

[0019] An ultrasonic transducer body, an ultrasonic enhancement cavity and an ultrasonic enhancement body are sequentially arranged in the catheter assembly, wherein the ultrasonic enhancement cavity is arranged on the surface of the ultrasonic transducer body opposite to the surface for emitting the ultrasonic wave.

[0020] Optionally, the positioning unit is a Hall device.

[0021] Optionally, the extracorporeal part also includes a shell and a fixing member arranged on the shell, wherein the fixing member is used to fix the extracorporeal unit on the diagnosed body after the positioning unit is positioned, and the positioning unit, the alternating magnetic field control unit, the high-frequency pulse transceiver unit, and the alternating magnetic field generating unit are arranged in the shell.

[0022] Optionally, the alternating magnetic field generating unit includes a plurality of induction coils.

[0023] Optionally, the magnetic drive unit includes a permanent magnet and an insulating colloid wrapped around the side of the permanent magnet, and the planes where the positive and negative poles of the permanent magnet are located are both perpendicular to the rotation axis.

[0024] Optionally, the permanent magnet is cylindrical, and the axis of the cylinder is consistent with the axis of rotation.

[0025] Optionally, the high-frequency resonant transceiver unit includes: a resonant transceiver coil, a resonant capacitor connected in parallel with the resonant transceiver coil, and a PCB connected in parallel with the resonant transceiver coil and the resonant capacitor.

[0026] Optionally, also include:

[0027] An ultrasound host connected to the external part, the ultrasound host includes a control unit for controlling the alternating magnetic field generating unit and / or the high-frequency pulse transceiver unit.

[0028] Optionally, a display unit connected to the ultrasound host is further included, for displaying an image of the positional relationship between the internal part and the external part in real time.

[0029] The present application provides an intravascular ultrasound diagnosis system, comprising an internal part and an external part; the external part is placed outside the diagnosed body, and comprises: a positioning unit for determining the relative position of the external part and the internal part; an alternating magnetic field generating unit for generating an alternating magnetic field corresponding to the rotation speed of an ultrasonic transducer; a high-frequency pulse transceiver unit for transmitting an electric pulse corresponding to the ultrasonic frequency to the internal part, and receiving an electric signal corresponding to the ultrasonic echo signal returned from the internal part; the internal part is placed in a blood vessel of the diagnosed body, and comprises: a high-frequency resonance transceiver unit for generating a corresponding excitation pulse according to the electric pulse received from the external part, for converting the ultrasonic echo signal into an electric signal, and transmitting it to the external part; an ultrasonic transducer for generating an ultrasonic wave according to the excitation pulse, and for generating a corresponding ultrasonic echo signal according to the ultrasonic echo received reflected by the blood vessel wall; a magnetic drive unit for rotating in the alternating magnetic field and driving the ultrasonic transducer to rotate synchronously; and a catheter assembly for accommodating and installing the high-frequency resonance transceiver unit, the ultrasonic transducer, and the magnetic drive unit, so that the ultrasonic transducer and the magnetic drive unit rotate synchronously.

[0030] It can be seen that the present application realizes wireless transmission of signals by emitting electric pulses corresponding to the ultrasonic frequency in the external part, and after the internal part receives the electric pulses, the high-frequency resonance transceiver unit generates corresponding excitation pulses so that the ultrasonic transducer generates ultrasonic waves, and then the ultrasonic transducer generates corresponding ultrasonic echo signals. The high-frequency resonance transceiver unit in the internal part receives the electric signal corresponding to the ultrasonic echo signal returned from the internal part, so that the external part receives the electric signal, thereby avoiding the problems of signal attenuation, signal interference and line delay, improving the signal reception strength and thus improving the imaging effect and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the structure of an intravascular ultrasound diagnostic system provided in an embodiment of the present application;

[0033] Figure 2 A cross-sectional view of an external part provided in an embodiment of the present application;

[0034] Figure 3 A cross-sectional view of another side of the external part provided in an embodiment of the present application;

[0035] Figure 4A-4C A schematic diagram of the assembly of a rotating assembly in a catheter assembly provided in an embodiment of the present application;

[0036] Figure 5 A schematic diagram of the structure of a high-frequency resonance transceiver unit provided in an embodiment of the present application;

[0037] Figure 6 A schematic diagram of the principle of a high-frequency resonance transceiver unit provided in an embodiment of the present application;

[0038] Figure 7 A transverse cross-sectional view of a magnetic drive unit provided in an embodiment of the present application;

[0039] Figure 8 A longitudinal cross-sectional view of a magnetic drive unit provided in an embodiment of the present application;

[0040] Fig. 9 A schematic diagram of a partial side section structure of an intravascular ultrasound diagnostic system provided in an embodiment of the present application;

[0041] Fig.10 A schematic diagram of the operation of an intravascular ultrasound diagnostic system provided in an embodiment of the present application;

[0042] Figure 11a-Figure 11e A schematic diagram of a rotation principle provided in an embodiment of the present application;

[0043] Fig.12 This is a flow chart of an intravascular ultrasound diagnostic method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0045] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of an intravascular ultrasound diagnostic system provided in an embodiment of the present application specifically includes:

[0046] The internal part 100 and the external part 200 are arranged outside the diagnosed body, and include: a positioning unit 210 for determining the relative position of the external part 200 and the internal part 100; an alternating magnetic field generating unit 220 for generating an alternating magnetic field corresponding to the rotation speed of the ultrasonic transducer 130; a high-frequency pulse transceiver unit 230 for transmitting electric pulses corresponding to the ultrasonic frequency to the internal part 100, and receiving electric signals corresponding to the ultrasonic echo signals returned from the internal part 100; the internal part 100 is arranged in the blood vessel of the diagnosed body, and includes: a high-frequency resonance transceiver unit 120 for transmitting electric pulses corresponding to the ultrasonic frequency to the internal part 100 according to the ultrasonic echo signals received from the external part; The electrical pulse received by the ultrasonic transducer 130 generates a corresponding excitation pulse, which is used to convert the ultrasonic echo signal into an electrical signal and transmit it to the external part 200; the ultrasonic transducer 130 unit 130 is used to generate an ultrasonic wave according to the excitation pulse, and is used to generate a corresponding ultrasonic echo signal according to the ultrasonic echo reflected by the blood vessel wall; the magnetic drive unit 140 is used to rotate in the alternating magnetic field and drive the ultrasonic transducer 130 to rotate synchronously; the catheter assembly 110 is used to accommodate and install the high-frequency resonance transceiver unit 120, the ultrasonic transducer 130, and the magnetic drive unit 140, so that the ultrasonic transducer 130 and the magnetic drive unit 140 rotate synchronously.

[0047] This embodiment can be applied to IVUS ultrasonic medical technology equipment. This embodiment does not limit the position of each component of the extracorporeal part 200. It is worth noting that since the positioning unit 210 is used to realize the positioning of the extracorporeal part 200, it is preferably arranged at the edge position to improve the accuracy of positioning. Since the alternating magnetic field generating unit 220 generates an alternating magnetic field according to an alternating electric drive signal to drive the rotation of the magnetic drive unit 140, it is preferably also arranged at the edge position to improve the accuracy and efficiency of controlling the rotation of the magnetic drive unit 140. It may further include a shell. Please refer to Figure 2 and Figure 3 , Figure 2 A cross-sectional view of an external part 200 provided in an embodiment of the present application, Figure 3A cross-sectional view of another side of the external portion 200 provided in an embodiment of the present application.

[0048] The positioning unit 210 is used to locate the position of the internal unit. The positioning unit 210 can use a magnetic sensitive device or other methods for positioning. The present embodiment does not limit the number of positioning units 210, as long as the purpose of the present embodiment can be achieved. For example, the positioning unit 210 can be a Hall device. The alternating magnetic field generating unit 220 is used to generate an alternating magnetic field corresponding to the rotation speed of the ultrasonic transducer 130. The alternating magnetic field generating unit 220 can be an electromagnetic coil with a preset number of electromagnetic coils to achieve the rotation of the magnetic drive unit 140 of the internal part 100. The present embodiment does not limit the size and number of the electromagnetic coils in the alternating magnetic field generating unit 220, and the user can set it according to actual needs. The alternating magnetic field generating unit 220 includes a plurality of induction coils. Preferably, the alternating magnetic field generating unit 220 includes 4 electromagnetic coils.

[0049] The high-frequency pulse transceiver unit 230 is used to transmit an electric pulse corresponding to the ultrasonic frequency to the internal body part 100, and receive an electric signal corresponding to the ultrasonic echo signal returned from the internal body part 100. Specifically, the high-frequency pulse transceiver unit 230 includes an ultrasonic transceiver module and an ultrasonic transceiver antenna connected to the ultrasonic transceiver module. The high-frequency pulse transceiver unit 230 can transmit a 50MHz ultrasonic wave signal with a power of about 600W (200V*3A). Of course, it can also be an ultrasonic wave signal of other intensities. The user can set it according to the actual lesion inspection, and this embodiment will not be limited.

[0050] The internal part 100 is placed in the blood vessel of the diagnosed body, and includes: a high-frequency resonance transceiver unit 120, which is used to generate a corresponding excitation pulse according to the electrical pulse received from the external part 200, and is used to convert the ultrasonic echo signal into an electrical signal and transmit it to the external part 200; an ultrasonic transducer 130, which is used to generate ultrasonic waves according to the excitation pulse, and is used to generate a corresponding ultrasonic echo signal according to the ultrasonic echo reflected by the blood vessel wall; a magnetic drive unit 140, which is used to rotate in an alternating magnetic field and drive the ultrasonic transducer 130 to rotate synchronously; and a catheter assembly 110, which is used to accommodate and install the high-frequency resonance transceiver unit 120, the ultrasonic transducer 130, and the magnetic drive unit 140, so that the ultrasonic transducer 130 and the magnetic drive unit 140 rotate synchronously. This embodiment does not limit the positions of the components of the internal part 100, as long as the purpose of this embodiment can be achieved.

[0051] This embodiment does not limit the diameter, length and material of the catheter assembly 110, as long as the purpose of this embodiment can be achieved.

[0052] In another specific embodiment of the intravascular ultrasound diagnostic system provided in the present application, the catheter assembly 110 is further elaborated, and the catheter assembly 110 also includes: a positioning device, used to fix the ultrasonic transducer and the magnetic drive unit, so that the positioning device rotates synchronously with the magnetic drive unit and the ultrasonic transducer, so that the ultrasonic transducer can achieve circular scanning during rotation.

[0053] This embodiment does not limit the positioning device, as long as it can meet the purpose of this embodiment. The catheter assembly 110 includes: a positioning device, a catheter. In an achievable implementation, the positioning device may include a positioning frame, a front nesting layer, and a rear nesting layer. The positioning frame is arranged between the front nesting layer and the rear nesting layer, and the maximum width of the positioning frame is greater than the inner diameter of the front nesting layer and the inner diameter of the rear nesting layer, and the positioning can rotate between the front nesting layer and the rear nesting layer. An ultrasonic transducer 130 is fixed to the outside of one side of the rotation axis of the positioning frame, and a magnetic drive unit is also arranged in the positioning frame, so that the positioning device rotates synchronously with the magnetic drive unit 140 and the ultrasonic transducer 130, so that the ultrasonic transducer can realize annular scanning during rotation. Further, the ultrasonic transducer 130 rotates synchronously with the high-frequency resonance transceiver unit 120. The magnetic drive unit 140, the ultrasonic transducer 130 and the ultrasonic resonance transceiver unit 120 are realized by the positioning device. The stable synchronous rotation of the magnetic drive unit 140, the ultrasonic transducer 130 and the ultrasonic resonance transceiver unit 120 is simple in structure, the stability of the rotation is improved, and the echo signal strength is enhanced.

[0054] Of course, when the intravascular ultrasound echo system is working, there may be other implementation forms. For details, please refer to Figure 4A-4C , Figure 4A-4C Schematic diagram of the assembly of different catheter assemblies 110 provided in the embodiments of the present application. Figure 4A The catheter assembly 110a includes a catheter 111a, a front nesting layer 112a, and a rear nesting layer 113a. The corresponding magnetic drive unit 140, ultrasonic transducer 130 and high-frequency resonance transceiver unit 120 are fixed between the front nesting layer 112a and the rear nesting layer 113a of the catheter assembly 110a. Figure 4B The conduit assembly 110b is a conduit and a flange corresponding to the magnetic drive unit 140 is fixedly arranged on the inner wall of the conduit assembly 110b. At this time, the movement of the internal components can be reduced by this fixing method, and the service life can be increased; Figure 4C The catheter assembly 110c includes a catheter 111c and a bearing 150. The magnetic drive unit 140 is fixed by the bearing 150. When the magnetic drive unit 140 rotates, the high-frequency resonance transceiver unit 120 and the ultrasonic transducer 130 are controlled to rotate synchronously. Of course, other methods can also be used for fixing and controlling.

[0055] against Figure 4AThe catheter assembly 110a includes a catheter 111a, a front nesting layer 112a, and a rear nesting layer 113a. The outer surface of the front nesting layer 112a on the inner wall of the catheter 111a and the outer surface of the rear nesting layer 113a on the inner wall of the catheter 111a are coated with a lubricating layer. An ultrasonic transducer 130, a magnetic drive unit 140 and other devices are arranged between the front nesting layer 112a and the rear nesting layer 113a. Furthermore, a lubricating layer is coated at the place where the rotating part and the fixed part rub against each other to reduce friction and ensure the friction between the catheter assembly and the rotating part. Figure 4B , the outer surface of the flange of the catheter component 110b is coated with a lubricating layer; Figure 4C , the outer surface of the bearing 150 of the catheter assembly 110c is coated with a lubricating layer. Of course, in addition to the above-mentioned cases, a lubricating layer can also be coated between the rotating part and the fixed part. Preferably, the lubricating layer is applied by evaporation. Preferably, the lubricating layer is a graphite layer. Graphite has good lubrication properties and is not affected by environmental changes. For example, it can reduce friction well in water, oil, air, blood, and various solutions; the main component of graphite is carbon, which is an essential element for the human body and has low toxicity. The dust removed by friction can be well absorbed by the body without harm; graphite has stable properties and can remain unchanged for a long time, or a small amount can be converted into carbon dioxide, which has no toxic side effects; after part of the graphite is converted into oxides to generate gas and dissipate, the remaining does not affect the lubrication properties, and can quickly form a two-dimensional state during rotation to supplement the loss surface.

[0056] For details about the high-frequency resonance transceiver unit 120, please refer to Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the structure of the high-frequency resonance transceiver unit 120 provided in an embodiment of the present application. Figure 6 The schematic diagram of the principle of the high-frequency resonant transceiver unit 120 provided in the embodiment of the present application includes: a resonant transceiver coil 121; a resonant capacitor 122 connected in series with the resonant transceiver coil 121; a submerged impedance PCB 123 connected in parallel with the resonant transceiver coil 121 and the resonant capacitor 122; and ultrasonic transducers 130 are connected at both ends of the submerged impedance PCB 123. The resonant transceiver coil 121 may be a 50MHz resonant transceiver coil.

[0057] The ultrasonic transducer 130 is used to generate ultrasonic waves according to the excitation pulse, and to generate corresponding ultrasonic echo signals according to the received ultrasonic echo reflected by the blood vessel wall. The receiving and transmitting signals of the ultrasonic transducer 130 are realized by the principle of electromagnetic resonance and wireless transmission technology. Specifically, a finished wireless transmission module can be used, or a self-designed circuit method can be used. This embodiment is not limited thereto, as long as the purpose of this embodiment can be achieved.

[0058] The magnetic drive unit 140 is used to rotate in the alternating magnetic field and drive the ultrasonic transducer 130 to rotate synchronously. The magnetic drive unit 140 drives the ultrasonic transducer 130 in the body to rotate 360 ​​degrees. Therefore, the ultrasonic echo reflected by the blood vessel wall is directly transmitted to the ultrasonic transducer 130 in a straight line without reversing reflection and is received by the ultrasonic transducer 130, and becomes an ultrasonic echo signal, so that the ultrasonic echo image can show a full range of true vascular tissue images of the cross-sectional vascular tissue. The magnetic drive unit 140 includes a magnetic rotor, and the specific magnetic rotor can be a permanent magnet or an ordinary magnetic rotor, as long as it can achieve the purpose of this embodiment. The present application does not limit the structure, shape, width, and length of the magnetic drive unit 140, as long as it can achieve the purpose of this embodiment. The magnetic drive unit 140 corresponds to the alternating magnetic field generating unit 220, and the magnetic drive unit 140 also corresponds to the positioning unit 210.

[0059] For permanent magnet rotors, please refer to Figure 7 and Figure 8 , Figure 7 A transverse cross-sectional view of a magnetic drive unit 140 provided in an embodiment of the present application, Figure 8 A longitudinal cross-sectional view of a magnetic drive unit 140 provided in an embodiment of the present application includes:

[0060] The permanent magnet 141 and the insulating colloid 142 wrapped around the side of the permanent magnet are both perpendicular to the rotation axis. Furthermore, the permanent magnet is cylindrical, and the axis of the cylinder is consistent with the rotation axis. It can be seen that the area of ​​the permanent magnet 141 is increased, which facilitates the synchronous rotation of the ultrasonic transducer 130 and the high-frequency resonance generating unit 120, and is convenient for actual control.

[0061] Furthermore, the internal body part 100 also includes a withdrawal device and a nickel bead position guide.

[0062] Based on the above technical solution, this embodiment transmits an electric pulse corresponding to the ultrasonic frequency at the external part 200, and after the internal part 100 receives the electric pulse, the high-frequency resonance transceiver unit 120 generates a corresponding excitation pulse so that the ultrasonic transducer 130 generates an ultrasonic wave, and then the ultrasonic transducer 130 generates a corresponding ultrasonic echo signal, and the high-frequency resonance transceiver unit 120 of the internal part 100 receives the electric signal corresponding to the ultrasonic echo signal returned from the internal part 100, so that the external part 200 receives the electric signal, thereby realizing wireless transmission of the signal, avoiding the problems of signal attenuation, signal interference and line delay, improving the signal reception strength and thus improving the imaging effect, and improving the user experience.

[0063] In another specific implementation of the intravascular ultrasound diagnostic system provided in the present application, the ultrasonic transducer 130 is further described. Fig. 9 , Fig. 9 A schematic diagram of a partial side section structure of an intravascular ultrasound diagnostic system provided in an embodiment of the present application, wherein the intravascular ultrasound diagnostic system further includes:

[0064] An ultrasonic enhancement cavity 170 with a preset thickness is arranged on a side of the ultrasonic transducer 130 close to the rotation axis of the positioning frame, and the preset thickness is 1 / 2 of the ultrasonic wavelength. The ultrasonic reinforcement body 180 is arranged on a side of the ultrasonic enhancement cavity 170 away from the ultrasonic transducer 130.

[0065] The preset thickness of the ultrasonic enhancement cavity 170 is 1 / 2 of the ultrasonic wave length. After the ultrasonic transducer 130 is stimulated to emit mechanical ultrasonic waves, it will be divided into two parts. One part is directly radiated to form an ultrasonic emission signal, namely, ultrasonic waves. The other part is emitted backward, passes through the ultrasonic enhancement cavity 170, reaches the ultrasonic enhancement body 180, and is then reflected by the ultrasonic enhancement body 180, passes through the ultrasonic enhancement cavity 170 twice, reaches the ultrasonic transducer 130, and is superimposed with the next ultrasonic pulse. Because the thickness of the ultrasonic enhancement cavity 170 is exactly 1 / 2 of the wavelength, after the ultrasonic wave passes through the ultrasonic enhancement cavity 170 twice, when it reaches the ultrasonic transducer 130, it coincides with the second excitation pulse. According to the principle of sound wave superposition, after the two ultrasonic waves in phase are superimposed, the intensity is the sum of the original two ultrasonic intensities, which effectively enhances the transmission power of the ultrasonic transducer 130. Among them, a fixed insulating frame 160 is also arranged around the high-frequency resonance transceiver unit 120.

[0066] Based on the above technical solution, this embodiment enhances the transmission power of the ultrasonic transducer, improves the intensity of signal reception, and improves the clarity of the acquired vascular tissue image by providing an ultrasonic enhancement cavity and an ultrasonic enhancement body.

[0067] In another specific embodiment of the intravascular ultrasound diagnostic system provided in the present application, the extracorporeal part 200 is further elaborated, and the extracorporeal part 200 also includes a shell and a fixing member arranged on the shell, and the fixing member is used to fix the extracorporeal unit on the diagnosed body after the positioning unit 210 is positioned. The positioning unit 210, the high-frequency pulse transceiver unit 230, and the alternating magnetic field generating unit 220 are arranged in the shell.

[0068] This embodiment does not limit the size and material of the housing, as long as it can achieve the purpose of this embodiment. Preferably, the housing can be coated with a flexible material to improve skin-friendliness and user experience. This embodiment does not limit the fixing member, as long as it can fix the external part 200. Of course, the housing can also include a handle and an articulated arm for the convenience of technicians to operate.

[0069] Based on the above technical solution, this embodiment improves the operability of the external part 200 by adding fixings to the shell.

[0070] In another specific embodiment of the intravascular ultrasound diagnostic system provided in the present application, the intravascular ultrasound diagnostic system also includes: an ultrasound host connected to the external part 200, the ultrasound host including a control unit for controlling the alternating magnetic field generating unit 220 and / or the high-frequency pulse transceiver unit 230.

[0071] It can be understood that the external part 200 of the intravascular ultrasound diagnostic system is connected to the ultrasound host. The ultrasound host is connected to the display unit. The technician uses the external part 200 to approach the diagnosed body, and then determines the position of the magnetic drive unit 140 of the internal part 100 according to the positioning unit 210, that is, the image used to display the positional relationship between the internal part 100 and the external part 200 in real time. At this time, the corresponding signal strength is displayed on the display unit for accurate positioning. At this time, the alternating magnetic field generating unit 220 of the external part 200 can achieve efficient magnetic field drive on the magnetic drive unit 140 of the internal part 100. The ultrasound host sends a rotation instruction to the alternating magnetic field generating unit 220 so that the alternating magnetic field generating unit 220 generates an alternating magnetic field. It can be seen that by displaying the positioning picture on the display unit, it is convenient for the technician to adjust through the vascular tissue image until it is positioned to the target detection position, so as to more realistically display the vascular tissue image and reduce the inefficiency caused by blind movement. When the ultrasonic transducer 130 is excited by the excitation pulse, it emits ultrasonic waves of the same frequency; and generates corresponding ultrasonic echo signals according to the ultrasonic echoes reflected by the blood vessel wall; the high-frequency resonance transceiver unit 120 receives the ultrasonic echo signals, converts the ultrasonic echo signals into electrical signals, and transmits them to the external part 200. It can be seen that the ultrasonic host includes a control unit, which controls any one or more of the alternating magnetic field generating unit 220 and the high-frequency pulse transceiver unit 230.

[0072] This embodiment provides a schematic diagram of the working principle. Fig.10 , Fig.10 A working diagram of an intravascular ultrasound diagnostic system provided in an embodiment of the present application includes:

[0073] 1. The technician inserts the body part 100 into the blood vessel and extends it to the target detection position (generally, the target detection position is the place where the blood vessel is narrowed, that is, the lesion).

[0074] 2. According to the characteristics of the human body's vascular structure, the technician can determine the approximate position of the permanent magnet rotor of the internal part 100, that is, the initial position; the technician holds the external part 200, approaches the determined initial position, and moves it repeatedly. At this time, the positioning unit 210 senses the position with the strongest magnetic field, which is the exact position of the magnetic drive unit 140 in the body; this process displays the positioning picture through the display unit connected to the ultrasound host. The technician finds the exact position according to the prompt of the display unit and fixes the external part 200; at this time, the alternating magnetic field generating unit 220 has accurately corresponded to the magnetic drive unit 140 in the body, achieving the best magnetic field driving effect.

[0075] 3. The ultrasonic host sends a rotation command to the alternating magnetic field generating unit.

[0076] 4. After receiving the rotation command, the alternating magnetic field generating unit generates alternating electric drive signals in sequence according to the rotation speed. Taking the alternating magnetic field generating unit as 4 electromagnetic coils and the magnetic drive unit 140 as a permanent magnet rotor as an example, the electromagnetic coils generate an alternating magnetic field. This embodiment provides a rotation working principle, such as Figure 11a-Figure 11e As shown, Figure 11a-Figure 11e A schematic diagram of a rotation principle provided for an embodiment of the present application includes:

[0077] State 1: Assuming the initial state, the permanent magnet rotor of the body part 100 is as follows Fig.11a As shown, the left is the S pole and the right is the N pole, then the effect on the magnetic field is as follows Fig.11a As shown, the magnetism of the same pole produces attraction, while the magnetism of the opposite pole produces repulsion, and the permanent magnet rotor rotates counterclockwise;

[0078] State 2: When the permanent magnet rotor rotates to Fig.11b The driving current of the electromagnetic coil changes, and the middle is N. At this time, the S pole of the permanent magnet rotor 5 continues to be attracted and rotates counterclockwise.

[0079] State 3: When the permanent magnet rotor rotates to the vertical position Fig.11c When the electromagnetic coil is in the state, the current changes, producing Fig.11c In such a magnetic field, the S pole of the permanent magnet rotor continues to be attracted and repelled, and rotates in the counterclockwise direction;

[0080] State 4: When the permanent magnet rotor rotates to Fig.11d When the electromagnetic coil changes the polarity of the current again, the electromagnetic coil will produce Fig.11d The magnetic field pushes the permanent magnet rotor to continue rotating counterclockwise through repulsive force;

[0081] State 5: After rotating 180 degrees, the state returns to zero and reaches Fig.11eIn the horizontal state, the polarity of the permanent magnet rotor becomes left N and right S, but this is another zero state after turning 180 degrees.

[0082] By analogy, the rotation continues to complete the continuous rotation process required by IVUS and maintain the required rotation speed.

[0083] It can be understood that when the initial position is not in the above-mentioned state, the permanent magnet rotor in the body can be assumed not to rotate, because the alternating magnetic field generated by the electromagnetic coil is constantly changing and repeating periodically. Therefore, within one cycle, there must be a state that reaches the initial condition of the drive. Therefore, no matter what state the permanent magnet rotor is in, it can find its starting condition at the same time as the rotation command or after a delay of one cycle, and immediately enter the rotation synchronization state.

[0084] 5. When the alternating magnetic field generating unit 220 receives the rotation command, the 50MHz high-frequency pulse transceiver unit 230 emits a 50MHz electric pulse corresponding to the ultrasonic frequency, with a power of about 600W (200V*3A).

[0085] 6. After the high-frequency resonance transceiver unit 120 receives the electrical pulse, it will generate a corresponding excitation pulse of 50 MHz at the output end because it has the same frequency as its own inherent frequency, and send it to the ultrasonic transducer 130 through the wire.

[0086] 7. The ultrasonic transducer 130 is excited by the 50 MHz excitation pulse, emits ultrasonic waves of the same frequency, and transmits them to the blood vessel wall; the blood vessel wall reflects ultrasonic echoes of the same frequency, and the ultrasonic transducer 130 receives the ultrasonic echoes, generates ultrasonic echo signals of the same frequency, and sends them to the high-frequency resonance transceiver unit 120.

[0087] 8. The high-frequency resonance transceiver unit 120 receives the ultrasonic echo signal, converts the ultrasonic echo signal into an electrical signal, and transmits it to the external part 200.

[0088] 9. The high-frequency pulse transceiver unit 230 receives the electrical signal, converts the electrical signal into a digital signal, and sends it to the ultrasound host through the host cable.

[0089] 10. The ultrasound host uses an algorithm to display the vascular tissue in the form of an image on the display unit, so as to obtain the vascular tissue image.

[0090] The following is an introduction to an intravascular ultrasound diagnosis method provided in an embodiment of the present application. The intravascular ultrasound diagnosis method described below and the intravascular ultrasound diagnosis system described above can be referenced to each other. For details, please refer to Fig.12 , Fig.12 A flowchart of an intravascular ultrasound diagnostic method provided in an embodiment of the present application specifically includes:

[0091] S101, an alternating magnetic field generating unit generates an alternating magnetic field;

[0092] S102, the magnetic drive unit rotates in the alternating magnetic field, and drives the ultrasonic transducer to rotate synchronously at a rotation speed corresponding to the alternating magnetic field;

[0093] S103, the high-frequency pulse transceiver unit transmits electric pulses corresponding to the ultrasonic frequency to the internal body part;

[0094] S104, the high-frequency resonance transceiver unit generates a corresponding excitation pulse according to the electrical pulse received from the external part;

[0095] S105, the ultrasonic transducer generates ultrasonic waves according to the excitation pulse; and generates corresponding ultrasonic echo signals according to the received ultrasonic echo reflected by the blood vessel wall;

[0096] S106, the high-frequency resonance transceiver unit receives the ultrasonic echo signal, converts the ultrasonic echo signal into an electrical signal, and transmits it to the external part;

[0097] S107. The high-frequency pulse transceiver unit receives the electrical signal.

[0098] Furthermore, after the high-frequency pulse transceiver unit receives the electrical signal, it also includes: the high-frequency pulse transceiver unit converts the electrical signal into a digital signal; the ultrasound host receives and processes the digital signal, and sends the processed digital signal to the display unit; the display unit obtains a vascular tissue image based on the processed digital signal.

[0099] Furthermore, after the display unit acquires the vascular tissue image according to the processed digital signal, it also includes: when the external part moves, the ultrasound host reads the currently set parameters; the ultrasound host controls the external part to generate a corresponding alternating magnetic field and / or a corresponding electric pulse according to the parameters, so that the display unit can display the current vascular tissue image.

[0100] Since the embodiments of the intravascular ultrasound diagnostic method part correspond to the embodiments of the intravascular ultrasound diagnostic system part, please refer to the description of the embodiments of the intravascular ultrasound diagnostic system part for the embodiments of the intravascular ultrasound diagnostic method part, and will not be repeated here.

[0101] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0102] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0103] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0104] The above is a detailed introduction to an intravascular ultrasound diagnostic system provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. An intravascular ultrasound diagnostic system, characterized in that: It includes an internal part and an external part; the external part is placed outside the diagnosed body and includes: A positioning unit, used to determine the relative position of the external part and the internal part; An alternating magnetic field generating unit, used to generate an alternating magnetic field corresponding to the rotation speed of the ultrasonic transducer; A high-frequency pulse transceiver unit, used for transmitting electric pulses corresponding to the ultrasonic frequency to the internal body part, and receiving electric signals corresponding to the ultrasonic echo signals returned from the internal body part; The internal body part is placed in a blood vessel of the diagnosed body, and comprises: A high-frequency resonance transceiver unit, used for generating a corresponding excitation pulse according to the electrical pulse received from the external part, for converting the ultrasonic echo signal into the electrical signal, and transmitting it to the external part; An ultrasonic transducer, used for generating ultrasonic waves according to the excitation pulse, and for generating the corresponding ultrasonic echo signal according to the received ultrasonic echo reflected by the blood vessel wall; A magnetic drive unit, used for rotating in the alternating magnetic field and driving the ultrasonic transducer to rotate synchronously; A catheter assembly, used to accommodate and install the high-frequency resonance transceiver unit, the ultrasonic transducer, and the magnetic drive unit, so that the ultrasonic transducer and the magnetic drive unit rotate synchronously; The catheter assembly comprises: A positioning device is used to fix the ultrasonic transducer and the magnetic drive unit so that the positioning device rotates synchronously with the magnetic drive unit and the ultrasonic transducer, so that the ultrasonic transducer can realize circular scanning during rotation; the synchronous rotation of the magnetic drive unit, the ultrasonic transducer and the high-frequency resonance transceiver unit is realized by the positioning device to enhance the intensity of the ultrasonic echo signal; a fixed insulating frame is also arranged around the high-frequency resonance transceiver unit.

2. The intravascular ultrasound diagnostic system according to claim 1, characterized in that: The ultrasonic transducer comprises: An ultrasonic transducer body, an ultrasonic enhancement cavity and an ultrasonic enhancement body are sequentially arranged in the catheter assembly, wherein the ultrasonic enhancement cavity is arranged on the surface of the ultrasonic transducer body opposite to the surface for emitting the ultrasonic wave.

3. The intravascular ultrasound diagnostic system according to claim 1, characterized in that: The positioning unit is a Hall device.

4. The intravascular ultrasound diagnostic system according to claim 1, characterized in that: The external part also includes a shell and a fixing part arranged on the shell, and the fixing part is used to fix the external part on the diagnosed body after the positioning unit is positioned. The positioning unit, the alternating magnetic field control unit, the high-frequency pulse transceiver unit, and the alternating magnetic field generating unit are arranged in the shell.

5. The intravascular ultrasound diagnostic system according to claim 1, characterized in that: The alternating magnetic field generating unit includes a plurality of induction coils.

6. The intravascular ultrasound diagnostic system according to claim 1, characterized in that: The magnetic drive unit comprises a permanent magnet and an insulating colloid wrapped around the side of the permanent magnet, and the planes where the positive and negative poles of the permanent magnet are located are both perpendicular to the rotation axis.

7. The intravascular ultrasound diagnostic system according to claim 6, characterized in that: The permanent magnet is cylindrical, and the axis of the cylinder is consistent with the rotation axis.

8. The intravascular ultrasound diagnostic system according to claim 1, characterized in that: The high frequency resonant transceiver unit comprises: a resonant transceiver coil, a resonant capacitor connected in parallel with the resonant transceiver coil, and a PCB connected in parallel with the resonant transceiver coil and the resonant capacitor.

9. The intravascular ultrasound diagnostic system according to any one of claims 1 to 8, characterized in that: Also includes: An ultrasound host connected to the external part, the ultrasound host includes a control unit for controlling the alternating magnetic field generating unit and / or the high-frequency pulse transceiver unit.

10. The intravascular ultrasound diagnostic system according to claim 9, characterized in that: It also includes a display unit connected to the ultrasound host, which is used to display an image of the positional relationship between the internal part and the external part in real time.

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