CN211213245U

CN211213245U - Intravascular ultrasonic diagnosis system

Info

Publication number: CN211213245U
Application number: CN201921456181.3U
Authority: CN
Inventors: 赵传东
Original assignee: Sonoscape Medical Corp
Current assignee: Sonoscape Medical Corp
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-08-11
Anticipated expiration: 2029-08-30

Abstract

The application provides an intravascular ultrasound diagnostic system, through the electric pulse that corresponds with ultrasonic frequency at external partial transmission, after the electric pulse is received to internal part, high frequency resonance transceiver unit receives after the electric pulse, produce corresponding excitation pulse so that ultrasonic transducer produces the ultrasonic wave, then ultrasonic transducer produces corresponding ultrasonic echo signal, the electric signal that corresponds with ultrasonic echo signal that returns from internal part is received to internal part's high frequency resonance transceiver unit, so that external part receives the electric signal, realized the wireless transmission of signal, avoided signal attenuation, signal interference and the problem that the line sense delays, improve signal reception intensity and then improve the imaging effect, improve user experience.

Description

Intravascular ultrasonic diagnosis system

Technical Field

The application relates to the technical field of intravascular ultrasonic diagnosis, in particular to an intravascular ultrasonic diagnosis system.

Background

The intravascular ultrasound (IVUS) technology brings unprecedented convenience and rapidness to diagnosis and treatment of cardiovascular diseases, greatly improves the accuracy of judgment conclusion on the degree and the property of cardiovascular stenosis, and enables a conventionally adopted stent repair treatment scheme to have more detailed and reliable data parameters. Especially the composition of vulnerable plates in blood vessels, the severity of atherosclerosis and other advantages, which cannot be achieved by other diagnostic techniques.

The ultrasonic transducer in the blood vessel is a metal steel wire hose with the length of about 1.6 meters as a driving shaft, is inserted into the blood vessel in the body from the lower limb and extends to the position close to the heart through the blood vessel. The soft wire driving shaft is driven by a motor to rotate at the tail end outside the body, and the rotation is transmitted to the ultrasonic transducer at the other end close to the center by the soft wire driving shaft to drive the transducer to rotate. And simultaneously, the other motor drives the driving shaft to do withdrawing action. The whole rotating part of the intravascular ultrasonic diagnosis system has complex process and poor reliability, and in addition, because the catheter is longer, the remote loss and the line inductance delay of high-frequency signals are easily caused by adopting a guide wire in the catheter to transmit the signals, so that the signals are greatly weakened, and the real pathological change signal effect is further influenced; the weak ultrasonic echo signals are easily interfered by long-distance wire transmission.

Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The application aims to provide an intravascular ultrasonic diagnosis system which can improve the signal receiving intensity and further improve the imaging effect. The specific scheme is as follows:

the application provides an intravascular ultrasound diagnostic system, which comprises an internal part and an external part; the extracorporeal portion is placed outside the body to be diagnosed and comprises:

a positioning unit for determining a relative position of the extracorporeal portion and the intracorporeal portion;

an alternating magnetic field generating unit for generating an alternating magnetic field corresponding to a rotation speed of the ultrasonic transducer;

a high-frequency pulse transmitting/receiving unit for transmitting an electric pulse corresponding to an ultrasonic frequency to the internal body portion and receiving an electric signal corresponding to an ultrasonic echo signal returned from the internal body portion;

the intracorporeal portion is disposed within a blood vessel of the diagnosed body, comprising:

the high-frequency resonance transceiving unit is used for generating corresponding excitation pulses according to the electric pulses received from the extracorporeal part, converting the ultrasonic echo signals into the electric signals and transmitting the electric signals to the extracorporeal part;

the ultrasonic transducer is used for generating ultrasonic waves according to the excitation pulses and generating corresponding ultrasonic echo signals according to the received ultrasonic echoes reflected by the vascular wall;

the magnetic driving unit is used for rotating in the alternating magnetic field and driving the ultrasonic transducer to synchronously rotate;

and the catheter assembly is used for accommodating and mounting the high-frequency resonance transceiving unit, the ultrasonic transducer and the magnetic driving unit so as to ensure that the ultrasonic transducer and the magnetic driving unit synchronously rotate.

Optionally, the catheter assembly comprises:

and the positioning device is used for fixedly arranging the ultrasonic transducer and the magnetic driving unit so as to facilitate the synchronous rotation of the positioning device, the magnetic driving unit and the ultrasonic transducer, and the ultrasonic transducer realizes annular scanning during rotation.

Optionally, the ultrasonic transducer and the high-frequency resonance transceiving unit rotate synchronously.

Optionally, the ultrasonic transducer includes:

the ultrasonic enhancement cavity is arranged on the surface of the ultrasonic transducer body opposite to the surface for emitting the ultrasonic waves.

Optionally, the positioning unit is a hall device.

Optionally, the extracorporeal part further includes a housing and a fixing member disposed on the housing, the fixing member is configured to fix the extracorporeal unit to the body to be diagnosed after the positioning unit completes positioning, and the positioning unit, the alternating magnetic field control unit, the high-frequency pulse transceiving unit, and the alternating magnetic field generating unit are disposed in the housing.

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

Optionally, the magnetic driving unit includes a permanent magnet and an insulating colloid wrapped on the side of the permanent magnet, and planes on which the positive and negative poles of the permanent magnet are located are both perpendicular to the rotating shaft.

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

Optionally, the high-frequency resonance transceiver unit includes: the resonance circuit comprises a resonance transceiving coil, a resonance capacitor connected with the resonance transceiving coil in parallel, and a latent impedance PCB connected with the resonance transceiving coil and the resonance capacitor in parallel.

Optionally, the method further includes:

the ultrasonic main machine is connected with the external part of the body and comprises a control unit which is used for controlling the alternating magnetic field generating unit and/or the high-frequency pulse transceiving unit.

Optionally, the ultrasound imaging system further comprises a display unit connected to the ultrasound host, and configured to display an image of a positional relationship between the internal part and the external part in real time.

The application provides an intravascular ultrasound diagnostic system, which comprises an internal part and an external part; the extracorporeal portion is placed outside the body to be diagnosed and comprises: a positioning unit for determining the relative position of the extracorporeal portion and the intracorporeal portion; an alternating magnetic field generating unit for generating an alternating magnetic field corresponding to a rotation speed of the ultrasonic transducer; a high-frequency pulse transceiving unit for transmitting an electric pulse corresponding to an ultrasonic frequency to an internal body portion and receiving an electric signal corresponding to an ultrasonic echo signal returned from the internal body portion; the internal part of the body is arranged in the blood vessel of the diagnosed body, and comprises: the high-frequency resonance transceiving unit is used for generating corresponding excitation pulse according to the electric pulse received from the external part of the body, converting the ultrasonic echo signal into an electric signal and transmitting the electric signal to the external part of the body; the ultrasonic transducer is used for generating ultrasonic waves according to the excitation pulses and generating corresponding ultrasonic echo signals according to the received ultrasonic echoes reflected by the blood vessel wall; the magnetic driving unit is used for rotating in the alternating magnetic field and driving the ultrasonic transducer to rotate synchronously; and the catheter assembly is used for accommodating and mounting the high-frequency resonance transceiving unit, the ultrasonic transducer and the magnetic driving unit so that the ultrasonic transducer and the magnetic driving unit synchronously rotate.

It is thus clear that this application is through the electric pulse that corresponds with ultrasonic frequency at external part transmission, internal part receives the electric pulse after, high frequency resonance transceiver unit receives the electric pulse, produce corresponding excitation pulse so that ultrasonic transducer produces the ultrasonic wave, then ultrasonic transducer produces corresponding ultrasonic echo signal, internal part's high frequency resonance transceiver unit receives the signal of telecommunication corresponding with ultrasonic echo signal that returns from internal part, so that external part receives the signal of telecommunication, the wireless transmission of signal has been realized, signal attenuation, signal interference and the problem that the line sense delays have been avoided, improve signal reception intensity and then improve the imaging effect, improve user experience.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, 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 intravascular ultrasound diagnostic system according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of an extracorporeal portion provided in accordance with an embodiment of the present application;

FIG. 3 is a cross-sectional view of another side of an extracorporeal portion provided in accordance with an embodiment of the present application;

FIGS. 4A-4C are schematic diagrams illustrating assembly of a rotating assembly within a catheter assembly according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a high-frequency resonance transceiver unit according to an embodiment of the present application;

fig. 6 is a schematic diagram of a high-frequency resonance transceiver unit according to an embodiment of the present application;

FIG. 7 is a transverse cross-sectional view of a magnetic drive unit provided in an embodiment of the present application;

FIG. 8 is a longitudinal cross-sectional view of a magnetic drive unit provided in an embodiment of the present application;

fig. 9 is a schematic side-sectional view of a part of an intravascular ultrasound diagnostic system according to an embodiment of the present disclosure;

fig. 10 is a schematic diagram illustrating an intravascular ultrasound diagnostic system according to an embodiment of the present disclosure;

fig. 11a to fig. 11e are schematic views illustrating a rotation principle provided by an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an intravascular ultrasound diagnostic system according to an embodiment of the present application, which specifically includes:

an in vivo portion 100, an in vitro portion 200; the extracorporeal portion 200 is placed outside the body to be diagnosed and includes: a positioning unit 210 for determining the relative position of the extracorporeal portion 200 and the intracorporeal portion 100; an alternating magnetic field generating unit 220 for generating an alternating magnetic field corresponding to a rotation speed of the ultrasonic transducer 130; a high-frequency pulse transceiving unit 230 for transmitting an electric pulse corresponding to an ultrasonic frequency to the internal body portion 100 and receiving an electric signal corresponding to an ultrasonic echo signal returned from the internal body portion 100; the internal body portion 100 is placed within a blood vessel of a body to be diagnosed, and includes: a high-frequency resonance transceiving unit 120 for generating a corresponding excitation pulse according to the electrical pulse received from the extracorporeal portion 200, converting the ultrasound echo signal into an electrical signal, and transmitting the electrical signal to the extracorporeal portion 200; an ultrasonic transducer 130 unit 130 for generating ultrasonic waves according to the excitation pulses and for generating corresponding ultrasonic echo signals according to the received ultrasonic echoes reflected by the blood vessel wall; a magnetic driving unit 140 for rotating in the alternating magnetic field and driving the ultrasonic transducer 130 to rotate synchronously; and a catheter assembly 110 for accommodating and mounting 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.

The embodiment can be applied to IVUS ultrasonic medical technology equipment. The present embodiment does not limit the position of each component of the extracorporeal portion 200, and it should be noted that, since the positioning unit 210 is used to position the extracorporeal portion 200, it is preferably disposed at an edge position to improve the positioning accuracy, and since the alternating magnetic field generating unit 220 is used to generate the alternating magnetic field according to the alternating electric driving signal to drive the rotation of the magnetic driving unit 140, it is preferably disposed at an edge position to improve the accuracy and efficiency of controlling the rotation of the magnetic driving unit 140. Further, the device can also comprise a shell. Referring to fig. 2 and fig. 3, fig. 2 is a cross-sectional view of an extracorporeal portion 200 according to an embodiment of the present disclosure, and fig. 3 is a cross-sectional view of another side of the extracorporeal portion 200 according to an embodiment of the present disclosure.

The positioning unit 210 is configured to position the internal unit, and the positioning unit 210 may use a magnetic sensor or may use other methods to perform positioning. For example, the positioning unit 210 may be a hall device. An alternating magnetic field generating unit 220 for generating an alternating magnetic field corresponding to the rotation speed of the ultrasonic transducer 130. The alternating magnetic field generating unit 220 may be a unit in which a predetermined number of electromagnetic coils are provided so as to achieve the rotation of the magnetic driving unit 140 of the internal body portion 100. In this embodiment, the size and the number of the electromagnetic coils in the alternating magnetic field generating unit 220 are not limited, and a user can set the size and the number according to actual requirements. 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.

The high-frequency pulse transceiving unit 230 is configured to transmit an electric pulse corresponding to an ultrasonic frequency to the internal body portion 100 and receive an electric signal corresponding to an ultrasonic echo signal returned from the internal body portion 100. Specifically, the high-frequency pulse transceiving unit 230 includes an ultrasound transceiving module and an ultrasound transceiving antenna connected to the ultrasound transceiving module. The high-frequency pulse transceiver unit 230 may transmit 50MHz ultrasound wave signals with power of about 600W (200V × 3A), or may be ultrasound wave signals with other intensities, which may be set by a user according to an actual lesion examination, and this embodiment is not limited.

The internal body portion 100 is placed within a blood vessel of a body to be diagnosed, and includes: a high-frequency resonance transceiving unit 120 for generating a corresponding excitation pulse according to the electrical pulse received from the extracorporeal portion 200, converting the ultrasound echo signal into an electrical signal, and transmitting the electrical signal to the extracorporeal portion 200; an ultrasonic transducer 130 for generating ultrasonic waves according to the excitation pulses and for generating corresponding ultrasonic echo signals according to the received ultrasonic echoes reflected by the blood vessel wall; a magnetic driving unit 140 for rotating in the alternating magnetic field and driving the ultrasonic transducer 130 to rotate synchronously; and a catheter assembly 110 for accommodating and mounting 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. The present embodiment does not limit the position of each component of the internal body portion 100 as long as the object of the present embodiment can be achieved.

The present embodiment does not limit the diameter, length and material of the catheter assembly 110 as long as the object of the present embodiment can be achieved.

In another embodiment of the intravascular ultrasound diagnostic system provided herein, further described with respect to the catheter assembly 110, the catheter assembly 110 further comprises: and the positioning device is used for fixedly arranging the ultrasonic transducer and the magnetic driving unit so as to facilitate the synchronous rotation of the positioning device, the magnetic driving unit and the ultrasonic transducer, and the ultrasonic transducer realizes annular scanning during rotation.

The positioning device is not limited in this embodiment, as long as the object of this embodiment can be satisfied. The catheter assembly 110 includes: a positioning device and a catheter. In an implementation manner, the positioning device may include a positioning frame, a front nested layer, and a rear nested layer, the positioning frame is disposed between the front nested layer and the rear nested layer, the maximum width of the positioning frame is greater than the inner diameter of the front nested layer and the inner diameter of the rear nested layer, and the positioning frame is capable of rotating between the front nested layer and the rear nested layer, the ultrasonic transducer 130 is fixed outside one side of the rotation axis of the positioning frame, and a magnetic driving unit is further disposed in the positioning frame, so that the positioning device rotates synchronously with the magnetic driving unit 140 and the ultrasonic transducer 130, and the ultrasonic transducer realizes annular scanning when rotating. Further, the ultrasonic transducer 130 rotates in synchronization with the hf resonant transceiving unit 120. The magnetic driving unit 140, the ultrasonic transducer 130 and the ultrasonic resonance transceiving unit 120 can stably and synchronously rotate through the positioning device, the structure is simple, the rotating stability is improved, and the strength of echo signals is enhanced.

Of course, when the intravascular ultrasound echo system works, other implementation forms may also be provided, specifically referring to fig. 4A to 4C, and fig. 4A to 4C are schematic assembly diagrams of different catheter assemblies 110 provided in the embodiments of the present application. With respect to fig. 4A, catheter assembly 110a includes catheter 111a, front nested layer 112a, back nested layer 113a, with corresponding magnetic drive unit 140, ultrasonic transducer 130, and high frequency resonant transceiver unit 120 secured between front nested layer 112a, back nested layer 113a of catheter assembly 110 a; referring to fig. 4B, the catheter assembly 110B is a catheter and a flange corresponding to the magnetic driving unit 140 is fixedly provided on the inner wall of the catheter assembly 110B, in this case, the movement of the inner assembly can be reduced by such fixing, and the service life can be improved; referring to fig. 4C, the catheter assembly 110C includes a catheter 111C and a bearing 150, the magnetic driving unit 140 is fixed by the bearing 150, and the magnetic driving unit 140 rotates while controlling the high frequency resonance transceiver unit 120 and the ultrasonic transducer 130 to rotate synchronously. Of course, the fixed control can be performed in other ways.

With reference to fig. 4A, catheter assembly 110a includes catheter 111a, front nested layer 112a, and back nested layer 113a, with the outer surface of front nested layer 112a on the inner wall of catheter 111a, and the outer surface of back nested layer 113a on the inner wall of catheter 111a, all coated with a lubricious layer. An ultrasonic transducer 130, a magnetic driving unit 140 and the like are arranged between the front nested layer 112a and the back nested layer 113 a. Further, where the rotating part and the stationary part rub against each other, a lubricating layer is applied to reduce friction to ensure friction of the duct assembly with the rotating part. With respect to FIG. 4B, the outer surface of the flange of catheter assembly 110B is coated with a lubricating layer; referring to fig. 4C, the outer surface of bearing 150 of catheter assembly 110C is coated with a lubricating layer. Of course, other than the above, a lubricating layer may be applied between the rotating portion and the fixed portion. Preferably, the lubricating layer is applied by means of vapor coating. Preferably, the lubricating layer is a graphite layer. The graphite has good lubricating property and is not influenced by environmental change, such as good friction reduction performance in water, oil, air, blood and various solutions; the main component of the graphite is carbon which is an essential element for human bodies, the toxicity is low, and the abraded dust can be well absorbed by the human bodies without damage; the graphite has stable performance, can be kept for a long time without deterioration, or can be changed into carbon dioxide in a small amount, and has no toxic or side effect when being oxidized; after part of graphite is changed into oxide to generate gas to be diffused, the rest of the graphite does not influence the lubricating performance, and loss surface supplement in a two-dimensional state can be quickly formed in rotation.

With reference to fig. 5 and fig. 6, specifically, referring to the high-frequency resonance transceiver unit 120, fig. 5 is a schematic structural diagram of the high-frequency resonance transceiver unit 120 provided in the embodiment of the present application, and fig. 6 is a schematic principle diagram of the high-frequency resonance transceiver unit 120 provided in the embodiment of the present application, including: a resonance transceiver coil 121; a resonant capacitor 122 connected in series with the resonant transmitting and receiving coil 121; a latent impedance PCB123 connected in parallel with the resonant transmitting and receiving coil 121 and the resonant capacitor 122; both ends of the latent impedance PCB123 are connected to the ultrasonic transducer 130. The resonant transceiver coil 121 may be a 50MHz resonant transceiver coil.

The ultrasonic transducer 130 is used for generating ultrasonic waves according to excitation pulses and generating corresponding ultrasonic echo signals according to received ultrasonic echoes reflected by the vascular wall, the receiving and the signaling of the ultrasonic transducer 130 are realized by an electromagnetic resonance principle through a wireless transmission technology, specifically, a wireless transmission module finished product can be used, a self-designed circuit mode can also be used, the embodiment is not limited, and the purpose of the embodiment can be realized.

And a magnetic driving unit 140 for rotating in the alternating magnetic field and driving the ultrasonic transducer 130 to rotate synchronously. The magnetic driving unit 140 drives the in-vivo ultrasonic transducer 130 to rotate 360 degrees, so that the ultrasonic echo reflected by the blood vessel wall is directly transmitted to the ultrasonic transducer 130 to be received in a linear and non-reversing reflection mode and is changed into an ultrasonic echo signal, so that the ultrasonic echo image can display an omnibearing real blood vessel tissue image of the blood vessel tissue of the section. The magnetic driving unit 140 includes a magnetic rotor, and the magnetic rotor may be a permanent magnet or a general magnetic rotor as long as the object of the present embodiment can be achieved. The present application does not limit the structure, shape, width, length, and so on of the magnetic driving unit 140, and the magnetic driving unit 140 corresponds to the alternating magnetic field generating unit 220 and the magnetic driving unit 140 also corresponds to the positioning unit 210 as long as the object of the present embodiment can be achieved.

With reference to fig. 7 and 8, specifically, fig. 7 is a transverse cross-sectional view of a magnetic driving unit 140 provided in an embodiment of the present application, and fig. 8 is a longitudinal cross-sectional view of the magnetic driving unit 140 provided in the embodiment of the present application, including:

the permanent magnet 141 and the insulating colloid 142 wrapped on the side of the permanent magnet 141, and the planes of the positive and negative poles of the permanent magnet 141 are perpendicular to the rotating shaft. Furthermore, the permanent magnet is cylindrical, and the axis of the cylinder is consistent with the axis of the rotation. 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 facilitates the practical control.

Further, the body portion 100 may also include a retraction device, a nickel bead site director.

Based on the above technical solution, in this embodiment, the external part 200 transmits the electrical pulse corresponding to the ultrasonic frequency, the internal part 100 receives the electrical pulse, the high-frequency resonance transceiver unit 120 receives the electrical pulse and generates the corresponding excitation pulse so that the ultrasonic transducer 130 generates the ultrasonic wave, then the ultrasonic transducer 130 generates the corresponding ultrasonic echo signal, the high-frequency resonance transceiver unit 120 of the internal part 100 receives the electrical signal corresponding to the ultrasonic echo signal returned from the internal part 100 so that the external part 200 receives the electrical signal, thereby implementing wireless transmission of the signal, avoiding the problems of signal attenuation, signal interference and linear induction delay, improving the signal receiving intensity and further improving the imaging effect, and improving user experience.

In another embodiment of the intravascular ultrasound diagnostic system provided in the present application, the ultrasound transducer 130 is further described, specifically referring to fig. 9, and fig. 9 is a schematic side-cut structure diagram of a part of the intravascular ultrasound diagnostic system provided in an embodiment of the present application, where the intravascular ultrasound diagnostic system further includes:

an ultrasonic wave enhancement cavity 170 with a preset thickness, the ultrasonic wave enhancement cavity 170 is arranged on one side of the ultrasonic wave transducer 130 close to the rotating shaft of the positioning frame, the preset thickness is 1/2 of the ultrasonic wave wavelength, and the ultrasonic wave enhancement body 180 is arranged on one side of the ultrasonic wave enhancement cavity 170 far away from the ultrasonic wave transducer 130.

The preset thickness of the ultrasound enhancement cavity 170 is 1/2 ultrasonic wavelengths, and the ultrasonic transducer 130 is excited to emit mechanical ultrasonic waves, and then the ultrasonic waves are divided into 2 parts. One part is directly radiated to form an ultrasonic wave transmitting signal, namely ultrasonic wave. The other part is emitted backwards, passes through the ultrasonic enhancement cavity 170, reaches the ultrasonic enhancement body 180, is reflected by the ultrasonic enhancement body 180, passes through the ultrasonic enhancement cavity 170 twice, reaches the ultrasonic transducer 130, and is superposed with the next ultrasonic pulse. Because the thickness of the ultrasonic wave enhancement cavity 170 is exactly 1/2 wavelengths, when the ultrasonic wave passes through the ultrasonic wave enhancement cavity 170 twice and reaches the ultrasonic transducer 130, the ultrasonic wave just coincides with the excitation pulse of the second time, and according to the sound wave superposition principle, after the two ultrasonic waves with the same phase are superposed, the intensity is the sum of the original two ultrasonic wave intensities, so that the transmitting power of the ultrasonic transducer 130 is effectively enhanced. A fixed insulating frame 160 is further provided around the high-frequency resonance transceiver unit 120.

Based on the technical scheme, the ultrasonic enhancement cavity and the ultrasonic enhancement body are arranged, so that the transmitting power of the ultrasonic transducer is enhanced, the signal receiving intensity is improved, and the definition of obtaining the vascular tissue image is improved.

In another embodiment of the intravascular ultrasound diagnostic system provided by the present application, the extracorporeal portion 200 is further described, the extracorporeal portion 200 further includes a housing, a fixing member disposed on the housing, the fixing member is used for fixing the extracorporeal unit to the body to be diagnosed after the positioning unit 210 is positioned, and the positioning unit 210, the high-frequency pulse transceiving unit 230, and the alternating magnetic field generating unit 220 are disposed in the housing.

The present embodiment does not limit the size and material of the housing as long as the object of the present embodiment can be achieved. Preferably the housing may be coated with a flexible material to improve skin-friendliness and improve user experience. The fixing member is not limited in this embodiment as long as the external portion 200 can be fixed. Of course, a handle and an articulated arm may also be included on the housing for the technician to operate.

Based on the above technical solution, the present embodiment improves the operability of the extracorporeal portion 200 by adding the fixing member to the housing.

In another specific embodiment of the intravascular ultrasound diagnostic system provided by the present application, the intravascular ultrasound diagnostic system further comprises: an ultrasound mainframe connected to the extracorporeal portion 200, the ultrasound mainframe comprising a control unit for controlling the alternating magnetic field generating unit 220 and/or the high frequency pulse transceiving unit 230.

It will be appreciated that the extracorporeal portion 200 of the intravascular ultrasound diagnostic system is connected to an ultrasound host. The ultrasound host is connected with the display unit, a technician approaches the diagnosed body by using the extracorporeal portion 200, then determines the position of the magnetic driving unit 140 of the intracorporeal portion 100 according to the positioning unit 210, namely, the position is used for displaying the image of the position relation between the intracorporeal portion 100 and the extracorporeal portion 200 in real time, at the moment, the corresponding signal intensity is displayed on the display unit so as to be positioned accurately, and at the moment, the alternating magnetic field generating unit 220 of the extracorporeal portion 200 can achieve efficient magnetic field driving on the magnetic driving unit 140 of the intracorporeal portion 100. The ultrasonic host sends a rotation command to the alternating magnetic field generating unit 220 so that the alternating magnetic field generating unit 220 generates an alternating magnetic field. Therefore, the positioning picture is displayed through the display unit, so that technicians can conveniently adjust the positioning picture through the blood vessel tissue image until the positioning picture is positioned to the target detection position, the blood vessel tissue image is displayed more truly, and the low efficiency caused by blind movement is reduced. When the ultrasonic transducer 130 is excited by the excitation pulse, the ultrasonic wave with the same frequency is emitted; generating corresponding ultrasonic echo signals according to the received ultrasonic echoes reflected by the vessel wall; the high-frequency resonance transceiving unit 120 receives the ultrasonic echo signal, converts the ultrasonic echo signal into an electrical signal, and transmits the electrical signal to the extracorporeal portion 200. It is known that the ultrasound main unit includes a control unit which controls any one or more of the alternating magnetic field generating unit 220 and the high frequency pulse transceiving unit 230.

In this embodiment, referring to fig. 10 specifically, fig. 10 is a schematic diagram of an intravascular ultrasound diagnostic system according to an embodiment of the present application, including:

1. the technician inserts the body portion 100 into a blood vessel and extends to a target detection site (typically, a site where the blood vessel is constricted, i.e., a lesion).

2. Based on the characteristics of the human vascular anatomy, the technician can determine the approximate position of the permanent magnet rotor of the intracorporeal portion 100, i.e., the initial position; a technician holds the external part 200 by hand, approaches the judged initial position, and repeatedly moves, and the positioning unit 210 senses the position with the strongest magnetic field at the moment, namely the accurate position of the internal magnetic driving unit 140; in the process, a display unit connected with the ultrasonic host displays a positioning picture, and technicians find out an accurate position according to the prompt of the display unit and fix the in-vitro part 200; at this time, the alternating magnetic field generating unit 220 has accurately corresponded to the magnetic driving unit 140 in the body, and the best magnetic field driving effect is achieved.

3. The ultrasonic main machine sends a rotation command to the alternating magnetic field generating unit.

4. After receiving the rotation command, the alternating magnetic field generating unit sequentially generates alternating electric drive signals according to the rotation speed. Taking the example that the alternating magnetic field generating unit is 4 electromagnetic coils, the magnetic driving unit 140 is a permanent magnet rotor, and the electromagnetic coils generate an alternating magnetic field, this embodiment provides a working principle of rotation, as shown in fig. 11a to 11e, and fig. 11a to 11e are schematic diagrams of a rotation principle provided by this embodiment of the present application, including:

state 1: assuming that in the initial state, the permanent magnet rotor of the internal part 100 is as shown in fig. 11a, the left is the S pole, and the right is the N pole, the action on the magnetic field is as shown in fig. 11a, the homopolar magnetism generates attraction, the heteropolar magnetism generates repulsion, and the permanent magnet rotor rotates counterclockwise;

state 2: when the permanent magnet rotor rotates to the position shown in fig. 11b, the driving current of the electromagnetic coil changes, the middle is N, and the S pole of the permanent magnet rotor 5 continues to be attracted and rotates counterclockwise.

State 3: when the permanent magnet rotor rotates to a state vertical to the state shown in fig. 11c, the current of the driving electromagnetic coil changes, a magnetic field shown in fig. 11c is generated, and the S pole of the permanent magnet rotor is continuously attracted and repelled to run in the counterclockwise direction;

and 4: when the permanent magnet rotor rotates to the position of fig. 11d, the electromagnetic coil changes the polarity of the current again, generates a magnetic field as shown in fig. 11d, and pushes the permanent magnet rotor to continue to rotate counterclockwise through a repulsive force;

and state 5: after 180 degrees rotation the state is zeroed, reaching the horizontal state of fig. 11e, the polarity of the permanent magnet rotor changes to left N right S, but this is already another state of zeroed after 180 degrees of reversal.

And the rotation is analogized to be performed, so that the process of continuous rotation required by the IVUS and the required rotating speed are maintained.

It will be appreciated that when the initial position is not in the above 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 periodically repeating, and therefore, a state must reach the initial condition of driving within one cycle, so that the permanent magnet rotor in any state can find its initial condition at the same time as the rotation command or after delaying one cycle, and immediately enter the rotation synchronization state.

5. When the alternating magnetic field generating unit 220 receives the rotation command, the 50MHz high frequency pulse transmitting/receiving unit 230 transmits 50MHz electric pulses corresponding to the ultrasonic frequency, and the power is about 600W (200V × 3A).

6. After receiving the electrical pulse, the hf resonant transceiver 120 generates a corresponding excitation pulse at 50MHz at the output end due to the same inherent frequency, and sends the excitation pulse to the ultrasonic transducer 130 through the wire.

7. The ultrasonic transducer 130 is excited by a 50MHz excitation pulse, emits ultrasonic waves with the same frequency and transmits the ultrasonic waves to the vessel wall; the blood vessel wall reflects the ultrasonic echo with the same frequency, and the ultrasonic transducer 130 receives the ultrasonic echo to generate an ultrasonic echo signal with the same frequency, which is sent to the high-frequency resonance transceiver unit 120.

8. The high frequency resonance transceiver unit 120 receives the ultrasonic echo signal, converts the ultrasonic echo signal into an electrical signal, and transmits the electrical signal to the extracorporeal portion 200.

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

10. The ultrasonic host displays the vascular tissue on the display unit in an image mode through an algorithm so as to obtain a vascular tissue image.

The intravascular ultrasound diagnosis method provided by the embodiment of the application specifically comprises the following steps:

the alternating magnetic field generating unit generates an alternating magnetic field; the magnetic driving unit rotates in the alternating magnetic field and drives the ultrasonic transducer to synchronously rotate at a rotating speed corresponding to the alternating magnetic field; the high-frequency pulse transceiving unit transmits electric pulses corresponding to the ultrasonic frequency to the internal part of the body; the high-frequency resonance transceiving unit generates corresponding excitation pulse according to the electric pulse received from the external part of the body; the ultrasonic transducer generates ultrasonic waves according to the excitation pulse; generating corresponding ultrasonic echo signals according to the received ultrasonic echoes reflected by the vessel wall; the high-frequency resonance receiving and transmitting unit receives the ultrasonic echo signal, converts the ultrasonic echo signal into an electric signal and transmits the electric signal to the external part of the body; the high-frequency pulse transceiving unit receives the electric signal; the high-frequency pulse transceiving unit converts the electric signal into a digital signal; the ultrasonic host receives and processes the digital signal and sends the processed digital signal to the display unit; the display unit acquires a blood vessel tissue image according to the processed digital signal; when the external part of the body moves, the ultrasonic host reads the currently set parameters; the ultrasonic host controls the external part to generate a corresponding alternating magnetic field and/or a corresponding electric pulse according to the parameters so as to display the current vascular tissue image by the display unit.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are 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.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

An intravascular ultrasound diagnostic system provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. An intravascular ultrasound diagnostic system comprising an internal body portion, an external body portion; the extracorporeal portion is placed outside the body to be diagnosed and comprises:

2. The intravascular ultrasound diagnostic system of claim 1, wherein the catheter assembly comprises:

3. The intravascular ultrasound diagnostic system according to claim 2, wherein the ultrasound transducer rotates synchronously with the high frequency resonance transceiver unit.

4. The intravascular ultrasound diagnostic system of claim 1, wherein the ultrasound transducer comprises:

5. The intravascular ultrasound diagnostic system of claim 1, wherein the positioning unit is a hall device.

6. The intravascular ultrasound diagnostic system according to claim 1, wherein the extracorporeal part further comprises a housing, and a fixing member provided on the housing, the fixing member being configured to fix the extracorporeal part to the body to be diagnosed after the positioning unit has been positioned, the positioning unit, the alternating magnetic field control unit, the high-frequency pulse transceiving unit, and the alternating magnetic field generating unit being provided in the housing.

7. The intravascular ultrasound diagnostic system according to claim 1, wherein the alternating magnetic field generating unit includes a plurality of induction coils.

8. The intravascular ultrasound diagnostic system according to claim 1, wherein the magnetic driving unit comprises a permanent magnet and an insulating colloid wrapped on the side of the permanent magnet, and the planes of the positive and negative poles of the permanent magnet are both perpendicular to the rotating shaft.

9. The intravascular ultrasound diagnostic system of claim 8, wherein the permanent magnet is cylindrical, and the axis of the cylinder coincides with the axis of rotation.

10. The intravascular ultrasound diagnostic system according to claim 1, wherein the high frequency resonance transceiving unit comprises: the resonance circuit comprises a resonance transceiving coil, a resonance capacitor connected with the resonance transceiving coil in parallel, and a latent impedance PCB connected with the resonance transceiving coil and the resonance capacitor in parallel.

11. The intravascular ultrasound diagnostic system according to any one of claims 1 to 10, further comprising:

12. The intravascular ultrasound diagnostic system according to claim 11, further comprising a display unit connected to the ultrasound host for displaying an image of a positional relationship between the internal body part and the external body part in real time.