Catheter assembly and intravascular ultrasonic imaging device

Abstract

The utility model provides a catheter assembly and an intravascular ultrasonic imaging device. The catheter assembly is used for at least movably collecting ultrasonic echo signals of vascular tissue. The catheter assembly comprises a shell, an ultrasonic transducer, a displacement sensor and a driving part. A containing cavity is formed in the shell. The ultrasonic transducer is arranged in the containing cavity and used for transmitting ultrasonic pulses to the vascular tissue and receiving ultrasonic echo signals formed by reflection of the vascular tissue. The displacement sensor is arranged in the containing cavity and used for obtaining position information in the moving process when the shell moves in the vascular tissue. The two ends of the driving part are connected with the ultrasonic transducer and the displacement sensor correspondingly, and the driving part is used for driving the ultrasonic transducer to rotate in the circumferential direction. Therefore, the structure of the intravascular ultrasonic imaging device is effectively simplified while the signal acquisition effect of the catheter assembly is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of ultrasound imaging, specifically to a catheter assembly and an intravascular ultrasound imaging device. Background Technology

[0002] When using ultrasound imaging devices to acquire images within blood vessels, a catheter containing a miniature ultrasound transducer needs to be inserted into the vessel. The ultrasound host is connected to the catheter via a catheter controller. The catheter controller sends high-voltage excitation pulses to the ultrasound transducer located at the distal end of the catheter, while a drive shaft inside the catheter drives the ultrasound transducer to rotate at high speed. Upon receiving the high-voltage excitation pulses, the ultrasound transducer emits ultrasonic pulses and receives ultrasonic echo signals reflected from the vascular tissue. The catheter controller amplifies, digitally acquires, and preprocesses the received ultrasonic echo signals before transmitting them to the ultrasound host, where vascular image processing and display are performed. Through continuous rotation and retraction spiral scanning of the ultrasound transducer, the ultrasound host can process the ultrasonic echo signals to generate two-dimensional cross-sectional images and long-axis two-dimensional images of the blood vessel, thus achieving 360-degree ultrasound scanning of the vascular cross-section.

[0003] However, the catheter controller contains numerous components for controlling the rotation of the ultrasonic transducer and emitting high-voltage excitation pulses, resulting in a large volume. Correspondingly, a drive shaft needs to be installed inside the catheter to facilitate rotation and retraction. This makes the catheter structure complex and its controllability poor. In summary, traditional ultrasound imaging devices are complex in structure and inconvenient to use. Utility Model Content

[0004] To at least partially address the problems existing in the prior art, according to one aspect of the present invention, a catheter assembly is provided. The catheter assembly is used to at least movably acquire ultrasound echo signals from vascular tissue, and includes a housing, an ultrasound transducer, a displacement sensor, and a drive component. A receiving cavity is formed within the housing. The ultrasound transducer is disposed within the receiving cavity and is used to emit ultrasound pulses to the vascular tissue and receive ultrasound echo signals reflected by the vascular tissue. The displacement sensor is disposed within the receiving cavity and is used to acquire position information during displacement within the vascular tissue. Both ends of the drive component are connected to the ultrasound transducer and the displacement sensor, respectively, and the drive component is used to drive the ultrasound transducer to rotate circumferentially.

[0005] The catheter assembly of this invention, when inserted into vascular tissue, allows the driving component to rotate the ultrasound transducer circumferentially. This enables the ultrasound transducer to emit ultrasound pulses comprehensively around the vascular tissue and receive ultrasound echo signals reflected from the tissue. The catheter assembly can move to collect the ultrasound echo signals from the vascular tissue, and the displacement sensor can obtain its position information during displacement through magnetic field positioning. This allows the displacement information of the ultrasound transducer connected to the displacement sensor to be determined. By combining the ultrasound echo signal with the displacement information of the ultrasound transducer and converting it into image information, an ultrasound image of the vascular tissue is obtained. Thus, the magnetic field positioning method using the displacement sensor simplifies the positioning of the ultrasound transducer, reduces the radiation impact on the patient caused by external angiography positioning, and effectively improves the patient's experience and convenience. Furthermore, the driving component for rotating the ultrasound transducer and the displacement sensor for determining the position of the ultrasound transducer can be integrated into the catheter housing. The catheter assembly can completely collect intravascular ultrasound signals from a specific vascular segment, and the intravascular ultrasound imaging device no longer needs a catheter controller. In other words, while ensuring the signal acquisition effect of the catheter assembly, the structure of the intravascular ultrasound imaging device is also effectively simplified.

[0006] For example, the conduit assembly further includes a connector having a first mover end and a first stator end, a drive member connected to the first mover end, and a displacement sensor connected to the first stator end.

[0007] For example, the catheter assembly further includes a signal rotation coupling device having a second moving end and a second stator end. The second moving end is connected to an ultrasonic transducer, and the second stator end is connected to an analog hardware unit. The signal rotation coupling device is used to transmit ultrasonic signals between the ultrasonic transducer and the analog hardware unit. The analog hardware unit is located in the catheter controller or host and is used for ultrasonic excitation.

[0008] For example, the ultrasonic transducer is attached to the side wall of the drive member so as to drive the ultrasonic transducer to rotate circumferentially via the drive member; or, the conduit assembly further includes a rotating member, and the drive member is connected to the ultrasonic transducer via the rotating member so as to drive the ultrasonic transducer to rotate circumferentially.

[0009] According to another aspect of the present invention, an intravascular ultrasound imaging device is also provided, including an ultrasound host and the catheter assembly as described above. The ultrasound host is electrically connected to a drive and an ultrasound transducer, respectively. The ultrasound host is used to send control signals to the drive and to acquire ultrasound echo signals received by the ultrasound transducer. The ultrasound host includes a magnetic field generating unit, which is used to generate a magnetic field for inducing the current generated by the displacement sensor to determine the position of the displacement sensor in the vascular tissue.

[0010] This novel intravascular ultrasound imaging device possesses the beneficial effects of the aforementioned catheter assembly. Furthermore, the magnetic field generating unit provides a stable magnetic field environment to more accurately determine the specific position of the displacement sensor within the vascular tissue, effectively improving the matching degree between the position of the ultrasound transducer and the received ultrasound echo signal. This magnetic field positioning method not only reduces the radiation impact on patients caused by the external angiography positioning of traditional intravascular ultrasound imaging devices but also enhances the patient experience and the ease of use for operators. The ultrasound host can be electrically connected to both the drive unit and the ultrasound transducer, sending control signals to the drive unit and acquiring the ultrasound echo signal received by the ultrasound transducer. This provides a foundation for the stable operation of the intravascular ultrasound imaging device and the accurate acquisition and processing of ultrasound signals, effectively ensuring the accuracy and reliability of the ultrasound imaging.

[0011] For example, the proximal end of the catheter assembly is formed with a catheter interface, and the ultrasound host is provided with a connection port adapted to the catheter interface to insert the catheter assembly into the ultrasound host.

[0012] For example, the catheter assembly further includes a first conductive element, the two ends of which are connected to the drive element and the ultrasound host, respectively, and the ultrasound host sends control signals to the drive element through the first conductive element.

[0013] For example, the ultrasonic host includes a simulation hardware unit for ultrasonic excitation and preprocessing of the ultrasonic echo signal received by the ultrasonic transducer.

[0014] For example, the intravascular ultrasound imaging device also includes a catheter controller. The ultrasound host is electrically connected to the catheter assembly through the catheter controller. The catheter controller is equipped with a simulation hardware unit for ultrasound excitation and preprocessing of the ultrasound echo signal received by the ultrasound transducer.

[0015] For example, the catheter controller is further provided with a retraction mechanism connected to the catheter assembly, which is used to move the catheter assembly away from the vascular tissue.

[0016] For example, the ultrasound host also includes a digital signal processing unit, which is electrically connected to the displacement sensor and is used to analyze the spatial position information of the displacement sensor.

[0017] For example, the ultrasound host also includes an image processing and display unit, which is electrically connected to the ultrasound transducer and the digital signal processing unit respectively. The image processing and display unit is used to process and display ultrasound images based on the spatial position information of the displacement sensor output by the digital signal processing unit.

[0018] For example, the ultrasonic host also includes a timing control unit, which is electrically connected to the drive, the ultrasonic transducer and the magnetic field generating unit respectively. The timing control unit is used to control the timing of the circumferential rotation of the drive, the ultrasonic transducer emitting ultrasonic pulses and receiving ultrasonic echo signals, and the magnetic field generating unit generating magnetic fields.

[0019] For example, the ultrasound host also includes a level conversion unit, which is electrically connected to the ultrasound transducer and is used to match the level signals of the ultrasound host and the ultrasound transducer.

[0020] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0021] The above and other objects, features, and advantages of this utility model will become more apparent from the more detailed description of the embodiments thereof in conjunction with the accompanying drawings. The drawings are provided to further illustrate the embodiments of this utility model and form part of the specification. They are used together with the embodiments of this utility model to explain the utility model and do not constitute a limitation thereof. In the drawings, the same reference numerals generally represent the same components or steps.

[0022] Figure 1 A structural block diagram of a catheter assembly according to an exemplary embodiment of the present invention is shown;

[0023] Figure 2 A first structural block diagram of an intravascular ultrasound imaging device according to an exemplary embodiment of the present invention is shown.

[0024] Figure 3 A second structural block diagram of an intravascular ultrasound imaging device according to an exemplary embodiment of the present invention is shown;

[0025] Figure 4 A schematic flowchart of a method for generating ultrasound images of vascular tissue according to an exemplary embodiment of the present invention is shown.

[0026] The components indicated by the reference numerals in the figures are as follows:

[0027] 1. Catheter assembly; 10. Housing; 11. Displacement sensor; 12. Drive unit; 13. Ultrasonic transducer; 14. Rotating component; 15. Catheter interface; 16. Inlet; 17. Guidewire inlet; 18. Guidewire outlet; 2. Ultrasonic main unit; 21. Magnetic field generating unit; 22. Analog hardware unit; 23. Digital signal processing unit; 24. Timing control unit; 25. Level conversion unit; 26. Image processing and display unit; 3. Catheter controller; 31. Retraction mechanism; 4. First conductive component; 5. Second conductive component. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model more apparent, exemplary embodiments according to this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this utility model, and not all embodiments of this utility model. It should be understood that this utility model is not limited to the exemplary embodiments described herein. Based on the embodiments of this utility model described herein, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this utility model.

[0029] In the following description, numerous details are provided to enable a thorough understanding of the present invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the present invention, which may be practiced without one or more of these details. Furthermore, to avoid confusion with the present invention, some technical features well-known in the art have not been described in detail.

[0030] To fully understand the embodiments of this utility model, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this utility model is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0031] One embodiment of this utility model provides a catheter assembly 1, which effectively simplifies the structure of the intravascular ultrasound imaging device while ensuring the signal acquisition effect of the catheter assembly. The catheter assembly 1 according to an embodiment of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] like Figure 1As shown, the catheter assembly 1 is used to at least movably acquire ultrasound echo signals from vascular tissue. The catheter assembly 1 includes a housing 10, an ultrasound transducer 13, a displacement sensor 11, and a drive unit 12. A receiving cavity is formed within the housing 10. The ultrasound transducer 13 is disposed within the receiving cavity and is used to emit ultrasound pulses to the vascular tissue and receive ultrasound echo signals reflected by the vascular tissue. The displacement sensor 11 is disposed within the receiving cavity and is used to acquire position information during displacement within the vascular tissue. Both ends of the drive unit 12 are connected to the ultrasound transducer 13 and the displacement sensor 11, respectively, and the drive unit 12 is used to drive the ultrasound transducer 13 to rotate circumferentially.

[0033] It should be noted that, Figure 1 The catheter assembly in the image is a simplified drawing. The actual catheter assembly is a long tubular structure, with an overall length of more than one meter, so that it can be inserted deep into the blood vessel for signal acquisition.

[0034] The displacement sensor 11 can be located at the distal end of the receiving cavity, and the proximal end of the displacement sensor 11 can be connected to the ultrasonic transducer 13 via the drive element 12. The distal end can be referred to as the end away from the operator. Similarly, the proximal end can be referred to as the end closer to the operator.

[0035] The displacement sensor 11 can move and acquire position information in real time after being subjected to external force. Since the displacement sensor 11 and the ultrasonic transducer 13 have a relatively fixed positional relationship, the position information of the ultrasonic transducer 13 can be determined.

[0036] The shape of the ultrasonic transducer 13 can be elongated. The driving component 12 can drive the ultrasonic transducer 13 to rotate circumferentially along its axis, thereby transmitting ultrasonic pulses to the vascular tissue in a comprehensive manner in order to obtain the signal of the vascular cross section.

[0037] Furthermore, the displacement sensor 11 and the drive member 12 are fixedly connected axially, and the drive member 12 can drive the ultrasonic transducer 13 to rotate circumferentially along its axis. This arrangement allows the ultrasonic transducer 13 to rotate while the displacement sensor 11 does not follow. Additionally, the displacement sensor 11, drive member 12, and ultrasonic transducer 13 can move within the receiving cavity under external force. For example, the drive member 12 is connected to a pulling member that extends outside the catheter assembly 1 (potentially near the catheter interface 15). The user can pull the pulling member outside the catheter assembly 1 to retract the displacement sensor 11, drive member 12, and ultrasonic transducer 13 within the receiving cavity. In some cases, the user can also directly pull the external portion of the catheter assembly 1 to retract the internal portion (i.e., within the vascular tissue) as a whole, thus retracting the displacement sensor 11, drive member 12, and ultrasonic transducer 13. As can be seen, this arrangement of displacement sensor 11, drive unit 12 and ultrasonic transducer 13 can realize the rotation and retraction of ultrasonic transducer 13 to achieve spiral retraction, thereby acquiring information on multiple cross-sections of a certain blood vessel segment; at the same time, displacement sensor 11 can follow the retraction process to obtain the position of ultrasonic transducer 13 when acquiring signals.

[0038] The driving element 12 can be composed of a permanent magnet and a coil. The size of the driving element 12 can be less than 0.8 mm, and the rotational speed of the driving element 12 can be greater than 30 times / second. Thus, while ensuring the miniaturization of the driving element 12, the driving efficiency of the driving element 12 can also be guaranteed. The driving element 12 can specifically be a motor, but this application does not make a specific limitation in this regard.

[0039] The ultrasonic transducer 13 is composed of a piezoelectric material, a matching layer, and a backing material. Based on the piezoelectric and inverse piezoelectric effects, it can perform electroacoustic and acoustic-electric conversion of ultrasonic signals, emit ultrasonic pulses, and receive ultrasonic echo signals. The piezoelectric material can be piezoelectric ceramic, piezoelectric single crystal, composite material, or polyvinylidene fluoride (PVDF) material, etc., preferably ceramic composite material or piezoelectric single crystal material, but this application does not make specific limitations on this.

[0040] A water inlet 16 communicating with the receiving cavity can be provided on the proximal side wall of the housing 10. Water can be injected into the receiving cavity through the water inlet 16 to couple the ultrasonic signal of the ultrasonic transducer 13. A guidewire inlet 17 can be provided at the distal end of the housing 10, and a guidewire outlet 18 can also be provided on the side wall of the housing 10 near the guidewire inlet 17. Through the cooperation of the guidewire with the guidewire inlet 17 and the guidewire outlet 18, the catheter assembly 1 can be delivered to the vascular tissue.

[0041] The housing 10 can be made of plastic to provide support and protection for the internal components. The material near the ultrasonic transducer 13 can be acoustically transparent to reduce the impact on ultrasonic signal transmission.

[0042] In this invention, when the catheter assembly 1 is inserted into the vascular tissue, the driving component 12 can drive the ultrasonic transducer 13 to rotate circumferentially, thereby enabling the ultrasonic transducer 13 to emit ultrasonic pulses all around the vascular tissue and receive the ultrasonic echo signals reflected by the vascular tissue. The catheter assembly can move to collect the ultrasonic echo signals of the vascular tissue, and the displacement sensor 11 can obtain its position information during the displacement process through magnetic field positioning. In this way, the displacement information of the ultrasonic transducer 13 connected to the displacement sensor 11 can be determined. By combining the ultrasonic echo signal with the displacement information of the ultrasonic transducer 13 and converting it into image information, an ultrasonic image of the vascular tissue can be obtained. In this way, the positioning method of the ultrasonic transducer 13 can be simplified by using magnetic field positioning, reducing the radiation impact on the patient caused by external angiography positioning, and effectively improving the patient's experience and convenience.

[0043] Furthermore, traditional intravascular ultrasound imaging devices include a catheter controller, which is quite bulky. Moreover, when using ultrasound imaging to explore a patient's blood vessels, to ensure image quality, the catheter controller needs to be placed close to the catheter. This typically requires medical staff to place the catheter controller on the patient's bed, significantly occupying the patient's space and impacting treatment. Additionally, there is a risk of the catheter controller falling out, posing a significant safety hazard to the patient. Traditional catheter assemblies incorporate a drive shaft connected to the catheter controller, which uses this shaft to rotate and retract the ultrasound transducer at its front end. This type of intravascular ultrasound imaging device is structurally complex and requires a catheter controller. The solution provided in this embodiment integrates the drive component 12 for driving the rotation of the ultrasound transducer 13 and the displacement sensor 11 for determining the position of the ultrasound transducer 13 into the catheter assembly 1. The functions traditionally implemented by the catheter controller are transferred to the catheter assembly 1. At the same time, special design is made based on the small size requirement of the catheter assembly 1. This not only ensures that the catheter assembly 1 can completely acquire intravascular ultrasound signals of a specific vascular segment, but also eliminates the need for a catheter controller in the intravascular ultrasound imaging device. That is, while ensuring the signal acquisition effect of the catheter assembly 1, the structure of the intravascular ultrasound imaging device is also effectively simplified.

[0044] In some embodiments, the conduit assembly 1 further includes a connector (not shown in the figure), the connector having a first mover end and a first stator end, the drive member 12 being connected to the first mover end, and the displacement sensor 11 being connected to the first stator end.

[0045] The connecting component can be a rotary transformer or a slip ring. Of course, the drive component 12 and the displacement sensor 11 can also be connected by bearings. This application does not make any specific limitations on this.

[0046] In the above embodiment, the displacement sensor 11 can be connected to the first stator end of the connector, and the drive member 12 can be connected to the first mover end of the connector. In this way, not only can a reliable connection be formed between the displacement sensor 11 and the drive member 12, but also the displacement sensor 11 can be prevented from rotating when the drive member 12 drives the ultrasonic transducer 13 to rotate. This allows the displacement sensor 11 to collect reliable axial position information, effectively ensuring the signal acquisition effect of the catheter assembly 1, and thus ensuring the effect and reliability of the ultrasonic image.

[0047] In some embodiments, the catheter assembly further includes a signal rotation coupling device (not shown in the figure), which has a second moving end and a second stator end. The second moving end is connected to the ultrasonic transducer 13, and the second stator end is connected to the analog hardware unit 22. The signal rotation coupling device is used to transmit ultrasonic signals between the ultrasonic transducer 13 and the analog hardware unit 22. The analog hardware unit 22 is disposed in the catheter controller or the host and is used for ultrasonic excitation.

[0048] The proximal end of the signal rotary coupling device can be configured as the second moving end described above, and the distal end of the signal rotary coupling device can be configured as the second stator end described above. In some cases, the proximal end of the signal rotary coupling device can also be configured as the second stator end described above, and the distal end of the signal rotary coupling device can be configured as the second moving end described above. The analog hardware unit 22 can be connected to the second stator end via a cable to realize wired transmission between the analog hardware unit 22 and the ultrasonic transducer 13.

[0049] Ultrasonic excitation refers to the ability to excite the ultrasonic transducer 13 to generate and emit ultrasonic pulses. Specifically, the analog hardware unit 22 can send an electrical signal to the ultrasonic transducer 13, causing the ultrasonic transducer 13 to convert the electrical signal into mechanical vibration, thereby generating ultrasonic pulses. Further, the ultrasonic signal transmitted between the ultrasonic transducer 13 and the analog hardware unit 22 may include: an ultrasonic excitation signal sent by the analog hardware unit 22 to the ultrasonic transducer 13, and an ultrasonic echo signal sent by the ultrasonic transducer 13 to the analog hardware unit 22.

[0050] The ultrasound transducer 13 can continuously rotate circumferentially to emit ultrasound pulses to the vascular tissue. The analog hardware unit 22 can be set in the catheter controller or the main unit. The non-contact transmission of ultrasound signals between the circumferentially rotating ultrasound transducer 13 and the stationary analog hardware unit 22 can be realized by using a signal rotation coupling device.

[0051] In the above embodiments, the signal rotation coupling device enables non-contact ultrasound signal transmission between the ultrasound transducer 13 and the analog hardware unit 22, thereby reducing wear and performance loss caused by the circumferential rotation of the ultrasound transducer 13. Furthermore, it allows the ultrasound transducer 13 to stably transmit ultrasound signals even at high speeds, effectively improving the stability and accuracy of ultrasound signal transmission. Additionally, some related technologies place the excitation signal source within the catheter assembly, but this results in a large volume of catheter assemblies, making them inconvenient for intravascular movement. In the above embodiments, the excitation signal source (i.e., the analog hardware unit 22) is located in the catheter controller or main unit, and the excitation signal is then transmitted to the ultrasound transducer 13 via a wired connection using the signal rotation coupling device. This reduces the need for a large catheter assembly, better meeting the requirements for intravascular ultrasound signal acquisition.

[0052] In some embodiments, the ultrasonic transducer 13 is attached to the sidewall of the drive member 12 so that the ultrasonic transducer 13 can be rotated circumferentially via the drive member 12; or, as... Figure 1 As shown, the catheter assembly 1 also includes a rotating member 14, and the driving member 12 is connected to the ultrasonic transducer 13 through the rotating member 14 to drive the ultrasonic transducer 13 to rotate circumferentially.

[0053] The ultrasonic transducer 13 can be disposed on the side of the drive member 12, so that the drive member 12 can drive the ultrasonic transducer 13 to rotate circumferentially. This method can keep the ultrasonic transducer 13 and the drive member 12 relatively stationary, effectively avoid the positional displacement of the ultrasonic transducer 13, and ensure the stability of the acquired signal.

[0054] like Figure 1 As shown, the catheter assembly 1 may also include a rotating member 14, with both ends of the rotating member 14 connected to the driving member 12 and the ultrasonic transducer 13 respectively. The driving member 12 drives the ultrasonic transducer 13 to rotate circumferentially through the rotating member 14.

[0055] The rotating component 14 can be rod-shaped. The driving component 12 can drive the rod-shaped rotating component 14 to rotate along its axial direction, thereby driving the ultrasonic transducer 13 connected to the rotating component 14 to rotate circumferentially. The rotating component 14 can specifically be a rotating shaft, etc., and this application does not specifically limit it. Exemplarily, the rotating component 14 is a rigid structure to prevent the ultrasonic transducer 13 from shifting its position during rotation, thus ensuring the stability of the acquired signal.

[0056] For example, the orientation of the ultrasound transducer 13 can be perpendicular to the axis of the catheter assembly, that is, the orientation of the ultrasound pulses emitted by the ultrasound transducer 13 is perpendicular to the blood vessel wall, thereby enabling reliable acquisition of cross-sectional images of the blood vessel.

[0057] In the above embodiment, the driving component 12 can drive the ultrasonic transducer 13 to rotate circumferentially. This not only ensures that the driving force generated by the driving component 12 is effectively transmitted to the ultrasonic transducer 13, but also enables the ultrasonic transducer 13 to emit ultrasonic pulses to the vascular tissue from all directions. This significantly improves the effect and efficiency of the ultrasonic transducer 13 in emitting ultrasonic pulses and receiving ultrasonic echo signals, thereby effectively improving the signal acquisition effect of the catheter assembly 1.

[0058] According to another aspect of this utility model, such as Figure 2 As shown, an intravascular ultrasound imaging device is also provided, including an ultrasound host 2 and the catheter assembly 1 as described above. The ultrasound host 2 is electrically connected to the drive 12 and the ultrasound transducer 13, respectively. The ultrasound host 2 is used to send control signals to the drive 12 and to acquire the ultrasound echo signals received by the ultrasound transducer 13. The ultrasound host 2 includes a magnetic field generating unit 21, which is used to generate a magnetic field for sensing the current generated by the displacement sensor 11 to determine the position of the displacement sensor 11 in the vascular tissue.

[0059] The magnetic field generating unit 21 can emit a magnetic field of a certain intensity and cover a certain range. The displacement sensor 11 can generate a weak current in the magnetic field formed by entering the magnetic field generating unit 21. Thus, the magnetic field generating unit 21 can determine the position information of the displacement sensor 11 based on the magnitude of the current when the displacement sensor 11 is at different positions in the magnetic field. Since there is a relatively fixed positional relationship between the displacement sensor 11 and the ultrasonic transducer 13, the position information of the ultrasonic transducer 13 can be determined.

[0060] In some other embodiments, the position information of the ultrasonic transducer 13 can be determined by coil positioning or Hall sensor positioning, and this application does not specifically limit this method.

[0061] In the above embodiments, the drive component 12 for rotating the ultrasound transducer 13 and the displacement sensor 11 for determining the position of the ultrasound transducer 13 are integrated into the catheter assembly 1. This transfers the functions traditionally performed by the catheter controller to the catheter assembly 1, while also incorporating special design considerations based on the small size of the catheter assembly 1. This not only ensures that the catheter assembly 1 can completely acquire intravascular ultrasound signals from a specific vascular segment, but also eliminates the need for a separate catheter controller in the intravascular ultrasound imaging device. In other words, while maintaining the signal acquisition effect of the catheter assembly 1, the structure of the intravascular ultrasound imaging device is effectively simplified. Furthermore, the magnetic field generating unit 21 provides a stable magnetic field environment to more accurately determine the specific position of the displacement sensor 11 within the vascular tissue, effectively improving the matching degree between the position of the ultrasound transducer 13 and the received ultrasound echo signal. Moreover, the magnetic field positioning method not only reduces the radiation impact on patients caused by the external angiography positioning of traditional intravascular ultrasound imaging devices, but also improves the patient's experience and the ease of use for operators. The ultrasound host 2 can be electrically connected to the drive unit 12 and the ultrasound transducer 13 respectively, and send control signals to the drive unit 12 and acquire the ultrasound echo signals received by the ultrasound transducer 13, thereby providing a basis for the stable operation of the intravascular ultrasound imaging device and the accurate acquisition and processing of ultrasound signals, effectively ensuring the accuracy and reliability of the intravascular ultrasound imaging device.

[0062] In some embodiments, such as Figure 2 As shown, the proximal end of the catheter assembly 1 has a catheter interface 15, and the ultrasound host 2 is provided with a connection port that is compatible with the catheter interface 15 so that the catheter assembly 1 can be inserted into the ultrasound host 2.

[0063] The catheter assembly 1 and the ultrasound host 2 can be directly or indirectly connected. Exemplarily, the catheter assembly 1 and the ultrasound host 2 can be connected via a second conductive element 5. Specifically, the proximal end of the catheter assembly 1 can form a catheter interface 15, and the distal end of the second conductive element 5 can form a connection port adapted to the catheter interface 15. Signal transmission between the catheter assembly 1 and the ultrasound host 2 can be achieved through the catheter interface 15 of the catheter assembly 1 and the connection port of the second conductive element 5. The second conductive element 5 can specifically be a wire or cable, etc., and this application does not specifically limit this. Connecting the catheter assembly 1 and the ultrasound host 2 via the second conductive element 5 not only ensures the stability and speed of signal transmission but also avoids radio frequency interference from the surrounding environment. Of course, in some other embodiments, the catheter assembly 1 and the ultrasound host 2 can transmit signals wirelessly. Exemplarily, wireless transceivers can be respectively installed in the catheter assembly 1 and the ultrasound host 2, and the wireless transceivers can transmit signals via a wireless network or Bluetooth.

[0064] The conduit interface 15 can be made of wear-resistant metal, thereby improving the stability of the connection between the conduit assembly 1 and the corresponding connected object, and extending the service life of the conduit assembly 1.

[0065] In the above embodiments, the catheter assembly 1 can be quickly and easily connected to the connection port of the ultrasound host 2 via the catheter interface 15, enabling convenient assembly and disassembly of the intravascular ultrasound imaging device. Furthermore, the direct connection between the catheter assembly 1 and the ultrasound host 2 ensures the stability of the connection, reducing the occurrence of signal transmission interruptions due to unstable connections, and effectively improving the convenience and reliability of the intravascular ultrasound imaging device.

[0066] In some embodiments, such as Figure 2 As shown, the catheter assembly 1 also includes a first conductive element 4, the two ends of which are connected to the drive element 12 and the ultrasound host 2, respectively. The ultrasound host 2 sends control signals to the drive element 12 through the first conductive element 4.

[0067] The first conductive element 4 enables the ultrasound host 2 to precisely send control signals to the drive element 12, achieving precise control of the drive element 12. This precise control of the drive element 12 significantly improves the reliability of the intravascular ultrasound imaging device. Furthermore, by adjusting the length of the first conductive element 4, the distance between the catheter assembly 1 and the ultrasound host 2 can be flexibly adjusted, allowing the intravascular ultrasound imaging device to meet different application scenarios or needs, effectively enhancing its practicality.

[0068] The first conductive element 4 can be a wire or cable, etc., but this application does not make any specific limitation.

[0069] In the above embodiments, the electrical connection between the drive unit 12 and the ultrasound host 2 is achieved through the first conductive element 4. This not only enables the control signal emitted by the ultrasound host 2 to be transmitted to the drive unit 12 quickly and accurately, thereby achieving precise control of the drive unit 12, but also ensures the stability and transmission speed of the control signal during transmission, avoids radio frequency interference of the environment on the control signal, and further improves the reliability of the intravascular ultrasound imaging device.

[0070] In some embodiments, such as Figure 2 As shown, the ultrasonic host 2 includes a simulation hardware unit 22, which is used for ultrasonic excitation and preprocessing of the ultrasonic echo signal received by the ultrasonic transducer 13.

[0071] Ultrasonic excitation refers to the generation and emission of ultrasonic pulses by the ultrasonic transducer 13. Specifically, an electrical signal can be sent to the ultrasonic transducer 13, causing it to convert the electrical signal into mechanical vibration, thereby generating ultrasonic pulses. In this embodiment, no additional components for ultrasonic excitation are required in the catheter assembly 1 to enable the ultrasonic transducer 13 to generate ultrasonic pulses. This effectively simplifies the structure of the catheter assembly 1 and allows it to meet the requirement of a small outer diameter, thus enhancing its clinical applicability and feasibility.

[0072] The analog hardware unit 22 can preprocess the ultrasonic echo signal, including amplification or filtering, thereby effectively improving the quality of the ultrasonic echo signal, reducing noise interference, and thus ensuring the accuracy and reliability of ultrasonic imaging.

[0073] The analog hardware unit 22 can also flexibly adjust parameters such as the signal waveform, pulse width, amplitude and frequency of ultrasound excitation to adapt to different vascular tissue thicknesses.

[0074] In the above embodiments, the analog hardware unit 22 can effectively improve the quality of the ultrasound echo signal and enhance the signal-to-noise ratio of the ultrasound echo signal. This not only improves the accuracy of the intravascular ultrasound imaging device but also ensures the flexibility and practicality of the intravascular ultrasound imaging device.

[0075] In some embodiments, such as Figure 3 As shown, the intravascular ultrasound imaging device also includes a catheter controller 3. The ultrasound host 2 is electrically connected to the catheter assembly 1 through the catheter controller 3. The catheter controller 3 is equipped with a simulation hardware unit 22, which is used for ultrasound excitation and preprocessing of the ultrasound echo signal received by the ultrasound transducer 13.

[0076] The catheter controller 3 can be connected to the ultrasound host 2 and the catheter assembly 1 respectively via the second conductive element 5.

[0077] The catheter controller 3 in this application has a simple structure. Compared to traditional catheter controllers that require rotation and retraction control, it lacks rotation control and digital signal processing functions, thus achieving a lightweight design. Specifically, traditional catheter controllers include analog hardware, digital signal processing hardware, a rotation mechanism, and a retraction mechanism. The analog and digital signal processing hardware can process the ultrasonic pulses emitted by the ultrasonic transducer and the received ultrasonic echo signals. The rotation and retraction mechanisms can control the drive shaft to rotate and retract the ultrasonic transducer at the front end. In contrast, this application integrates the digital signal processing and rotation / retraction functions of the ultrasonic transducer 13 into the catheter assembly 1 and the ultrasonic host 2, respectively. The catheter controller 3 only contains the analog hardware unit 22. This not only ensures the intensity and processing speed of the ultrasonic signal but also achieves a lightweight design for the catheter controller 3, significantly improving the user experience for both operators and patients.

[0078] In the above embodiments, the analog hardware unit 22 can be housed within the catheter controller 3, thereby allowing for a shorter ultrasound signal transmission distance between the ultrasound transducer 13 and the analog hardware unit 22. This reduces ultrasound signal attenuation during transmission, maintaining the integrity and strength of the ultrasound signal. Furthermore, the catheter controller 3, which includes the analog hardware unit 22, is relatively small, ensuring the safety and convenience of using the intravascular ultrasound imaging device.

[0079] In some embodiments, the catheter assembly 1 includes a signal rotation coupling device (not shown) having a second mover end and a second stator end, an ultrasonic transducer 13 connected to the second mover end, and an analog hardware unit 22 connected to the second stator end. The signal rotation coupling device is used to transmit ultrasonic signals between the ultrasonic transducer 13 and the analog hardware unit 22.

[0080] The proximal end of the signal rotary coupling device can be configured as the second moving end described above, and the distal end of the signal rotary coupling device can be configured as the second stator end described above. The analog hardware unit 22 can be connected to the second stator end via a cable to realize wired transmission between the analog hardware unit 22 and the ultrasonic transducer 13.

[0081] When the intravascular ultrasound imaging device performs ultrasound imaging on vascular tissue, the ultrasound transducer 13 can continuously rotate circumferentially to emit ultrasound pulses to the vascular tissue. The analog hardware unit 22 can be set inside the ultrasound host 2. The non-contact transmission of ultrasound signals between the circumferentially rotating ultrasound transducer 13 and the stationary analog hardware unit 22 can be realized by using a signal rotation coupling device.

[0082] In the above embodiments, the signal rotation coupling device in the ultrasonic host 2 enables non-contact ultrasonic signal transmission between the ultrasonic transducer 13 and the analog hardware unit 22, thereby reducing wear and performance loss caused by the circumferential rotation of the ultrasonic transducer 13. Furthermore, it allows the ultrasonic transducer 13 to stably transmit ultrasonic signals even at high speeds, effectively improving the stability and accuracy of ultrasonic signal transmission.

[0083] In some embodiments, such as Figure 3 As shown, the catheter controller 3 is also provided with a retraction mechanism 31 connected to the catheter assembly 1. The retraction mechanism 31 is used to move the catheter assembly 1 away from the vascular tissue.

[0084] The retraction mechanism 31 can be connected to the catheter interface 15 at the proximal end of the catheter assembly 1 and move the catheter assembly 1 toward the operator until the catheter assembly 1 is removed from the vascular tissue.

[0085] For example, the retraction mechanism 31 can specifically be a drive motor and a rack. The drive motor can drive the rack to move, thereby causing the conduit assembly 1 connected to the rack to retract. Of course, the retraction mechanism 31 can also be other mechanical structures capable of driving the conduit assembly 1 to retract, and this application does not specifically limit it.

[0086] Furthermore, the receiving cavity of the catheter assembly 1 may also be provided with a retraction shaft, one end of which is connected to the displacement sensor 11, the drive element 12, and / or the ultrasonic transducer 13, and the other end is connected to the retraction mechanism 31. This structure allows the retraction mechanism 31 to drive the ultrasonic transducer 13 to retract within the receiving cavity. In some cases, the receiving cavity of the catheter assembly 1 may not be provided with a retraction shaft, and after the catheter assembly 1 is connected to the catheter controller 3, the catheter controller 3 can drive the entire catheter assembly 1 to retract.

[0087] The catheter controller 3, comprising the analog hardware unit 22 and the retraction mechanism 31, can handle the front-end processing of ultrasound signals and the automatic retraction of the catheter. Furthermore, the retraction mechanism 31 can quickly move the catheter assembly 1 away from the vascular tissue based on the real-time position information fed back by the displacement sensor 11, effectively ensuring the safety and reliability of the intravascular ultrasound imaging device. The position information fed back by the displacement sensor 11 during the retraction process specifically includes the spatial position of the displacement sensor 11 and the retraction speed.

[0088] Of course, in some other embodiments, the catheter assembly 1 can also be manually removed from the vascular tissue. By using the catheter assembly 1 in conjunction with the retraction mechanism 31 or manual retraction, ultrasound images of the vascular tissue can be acquired quickly and efficiently.

[0089] In the above embodiments, the ultrasonic transducer 13 can emit ultrasonic pulses and receive ultrasonic echo signals reflected from vascular tissue in real time during the retraction process. The retraction mechanism 31 ensures that the ultrasonic transducer 13 retracts at a uniform speed and stably, thereby improving the effect and accuracy of the intravascular ultrasound imaging device, and further enhancing the automation level and ease of use of the intravascular ultrasound imaging device. Furthermore, the simple mechanical connection structure of the retraction mechanism 31 greatly reduces the processing difficulty and manufacturing cost of the catheter controller 3.

[0090] In some embodiments, such as Figure 2 and Figure 3 As shown, the ultrasound host 2 also includes a digital signal processing unit 23, which is electrically connected to the displacement sensor 11. The digital signal processing unit 23 is used to analyze the spatial position information of the displacement sensor 11.

[0091] The digital signal processing unit 23 can digitally process the signal generated by the displacement sensor 11, specifically including digital detection or digital filtering, thereby realizing the analysis of the spatial position information of the displacement sensor 11.

[0092] In the above embodiment, the digital signal processing unit 23 is electrically connected to the displacement sensor 11 and analyzes the spatial position information of the displacement sensor 11, thereby determining the spatial position information of the ultrasound transducer 13 through the displacement sensor 11, effectively improving the effect and accuracy of ultrasound imaging in the intravascular ultrasound imaging device.

[0093] In some embodiments, such as Figure 2 As shown, the ultrasonic host 2 also includes a timing control unit 24, which is electrically connected to the drive unit 12, the ultrasonic transducer 13 and the magnetic field generating unit 21 respectively. The timing control unit 24 is used to control the timing of the drive unit 12 rotating circumferentially, the ultrasonic transducer 13 emitting ultrasonic pulses and receiving ultrasonic echo signals, and the magnetic field generating unit 21 generating magnetic fields.

[0094] The timing control unit 24 can precisely control the operating timing of the drive unit 12, the ultrasonic transducer 13 and the magnetic field generating unit 21, ensuring the synchronization of the ultrasonic transducer 13 in emitting ultrasonic pulses and circumferential rotation, as well as the coordination between the circumferential rotation of the ultrasonic transducer 13 and the changes in the magnetic field.

[0095] The timing control unit 24 can also dynamically adjust the timing of the ultrasound excitation and reception of ultrasound echo signals of the ultrasound transducer 13 to adapt to different ultrasound imaging needs and conditions, effectively improving the flexibility and practicality of the intravascular ultrasound imaging device.

[0096] The timing control unit 24 can be constructed using electronic components such as timers, comparators, registers, and digital logic circuits, or implemented using processor chips such as microcontrollers, microprocessors, programmable logic controllers (PLCs), field-programmable gate arrays (FPGAs), and programmable logic arrays (PLAs) and their peripheral circuits. This application does not make any specific limitations on this.

[0097] In the above embodiments, the precise timing control by the timing control unit 24 can ensure the synchronization of the operation of each component in the intravascular ultrasound imaging device, thereby obtaining more accurate ultrasound images and further improving the accuracy and reliability of ultrasound imaging in the intravascular ultrasound imaging device.

[0098] In some embodiments, such as Figure 2 and Figure 3 As shown, the ultrasonic host 2 also includes a level conversion unit 25, which is electrically connected to the ultrasonic transducer 13. The level conversion unit 25 is used to match the level signals of the ultrasonic host 2 and the ultrasonic transducer 13.

[0099] In the above embodiments, the level conversion unit 25 can not only provide power to the components in the intravascular ultrasound imaging device, but also match components with different voltage levels, ensuring that the components in the ultrasound host 2 and the ultrasound transducer 13 can work under appropriate voltage, avoiding damage to the components, thereby improving the compatibility, safety and reliability of the intravascular ultrasound imaging device.

[0100] In some embodiments, such as Figure 2 and Figure 3 As shown, the ultrasound host 2 also includes an image processing and display unit 26, which is electrically connected to the ultrasound transducer 13 and the digital signal processing unit 23 respectively. The image processing and display unit 26 is used to process and display ultrasound images based on the spatial position information of the displacement sensor 11 output by the digital signal processing unit 23.

[0101] In the above embodiments, the image processing and display unit 26 can process the spatial position information of the displacement sensor 11 and the ultrasonic echo signal received by the ultrasonic transducer 13 to obtain the corresponding ultrasonic image, which greatly facilitates the operator's use of the intravascular ultrasound imaging device and effectively improves the practicality and convenience of the intravascular ultrasound imaging device.

[0102] According to another aspect of this utility model, such as Figure 4 As shown, a method for generating intravascular ultrasound images is also provided, applied to the intravascular ultrasound imaging device described above. The executing entity can be an ultrasound host. The generation method includes steps S110 to S150.

[0103] Step S110: Acquire multiple first position information generated in a time sequence as the displacement sensor moves within the vascular tissue.

[0104] Step S120: Determine multiple second position information of the ultrasonic transducer corresponding to each of the multiple first position information.

[0105] Step S130: Match the multiple ultrasonic echo signals received by the ultrasonic transducer with their corresponding multiple second position information to obtain multiple matched ultrasonic image signals.

[0106] Step S140: Generate multiple ultrasound images based on multiple ultrasound image signals.

[0107] Step S150: Stitch together multiple ultrasound images in time sequence to obtain a time sequence ultrasound image of vascular tissue.

[0108] After obtaining the time-series ultrasound images, the time-series ultrasound images can be output and displayed.

[0109] In the above embodiment, during the retraction process of the displacement sensor 11 within the vascular tissue, it can sequentially acquire first position information corresponding to its current position at preset time intervals. Since the displacement sensor 11 and the ultrasound transducer 13 have a relatively fixed positional relationship, multiple second position information of the ultrasound transducer 13 can be determined based on these multiple first position information. Then, multiple ultrasound echo signals received by the ultrasound transducer 13 during the retraction process can be matched one-to-one with the multiple second position information, thereby obtaining multiple ultrasound image signals sequentially acquired along the retraction path of the ultrasound transducer 13. After converting these multiple ultrasound image signals into ultrasound images, and combining and stitching these multiple ultrasound images, a complete temporal ultrasound image of the vascular tissue can be obtained, which can then form long-axis images, videos, three-dimensional reconstructed images, etc. Thus, by accurately matching the ultrasound echo signals and position information of the ultrasound transducer 13, more accurate ultrasound images can be generated, ensuring not only the quality and accuracy of the ultrasound images but also helping operators better understand the specific condition of the vascular tissue. Furthermore, the above method can provide real-time ultrasound images of the vascular tissue, greatly aiding in the dynamic monitoring of vascular tissue.

[0110] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that these exemplary embodiments are merely illustrative and are not intended to limit the scope of the invention. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of the invention. All such changes and modifications are intended to be included within the scope of the invention as claimed in the appended claims.

[0111] For ease of description, the term "connection" may be used herein to describe the relationship between one or more elements or features shown in the figure and other elements or features. It should be understood that "connection" may include direct connections or indirect connections via other elements or features, and this document is intended to encompass all such cases.

[0112] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0113] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0114] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the utility model to the described embodiments. Furthermore, those skilled in the art will understand that this utility model is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this utility model, all of which fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A catheter assembly comprising: The catheter assembly is used for collecting ultrasonic echo signals of at least moving vascular tissues, and comprises: a housing, which is internally formed with a receiving cavity; an ultrasonic transducer, which is arranged in the receiving cavity, and is used for emitting ultrasonic wave pulses to vascular tissues and receiving ultrasonic echo signals reflected by the vascular tissues; a displacement sensor, which is arranged in the receiving cavity, and is used for acquiring position information during movement when the displacement sensor is displaced in the vascular tissues; and a driving member, which is connected with the ultrasonic transducer and the displacement sensor at two ends thereof respectively, and is used for driving the ultrasonic transducer to rotate circumferentially.

2. The catheter assembly of claim 1, wherein, The catheter assembly further comprises a connecting member, which has a first mover end and a first stator end, the driving member is connected with the first mover end, and the displacement sensor is connected with the first stator end.

3. The catheter assembly of claim 1, wherein, The catheter assembly further comprises a signal rotation coupling device, which has a second mover end and a second stator end, the second mover end is connected with the ultrasonic transducer, and the second stator end is connected with an analog hardware unit, the signal rotation coupling device is used for transmitting ultrasonic signals between the ultrasonic transducer and the analog hardware unit; wherein the analog hardware unit is arranged in a catheter controller or a host computer, and is used for ultrasonic excitation.

4. The catheter assembly of claim 1, wherein, The ultrasonic transducer is attached to a side wall of the driving member, so as to be driven by the driving member to rotate circumferentially; or the catheter assembly further comprises a rotating member, the driving member is connected with the ultrasonic transducer through the rotating member, so as to drive the ultrasonic transducer to rotate circumferentially.

5. An intravascular ultrasound imaging device, characterized in that, The catheter assembly comprises an ultrasonic host computer and the catheter assembly as claimed in any one of claims 1 to 4, the ultrasonic host computer is electrically connected with the driving member and the ultrasonic transducer respectively, the ultrasonic host computer is used for sending control signals to the driving member, and acquiring the ultrasonic echo signals received by the ultrasonic transducer, the ultrasonic host computer comprises a magnetic field generating unit, the magnetic field generating unit is used for forming a magnetic field for inducing a current generated by the displacement sensor, so as to determine the position of the displacement sensor in the vascular tissues.

6. The intravascular ultrasound imaging device of claim 5, wherein, A catheter interface is formed at a proximal end of the catheter assembly, and a docking port matched with the catheter interface is arranged on the ultrasonic host computer, so as to insert the catheter assembly into the ultrasonic host computer.

7. The intravascular ultrasound imaging device of claim 5, wherein, The catheter assembly further comprises a first conductive member, two ends of the first conductive member are connected with the driving member and the ultrasonic host computer respectively, and the ultrasonic host computer sends control signals to the driving member through the first conductive member.

8. The intravascular ultrasound imaging device of claim 5, wherein, The ultrasonic host computer comprises an analog hardware unit, which is used for ultrasonic excitation and preprocessing of the ultrasonic echo signals received by the ultrasonic transducer.

9. The intravascular ultrasound imaging device of claim 5, wherein, The intravascular ultrasonic imaging device further comprises a catheter controller, the ultrasonic host computer is electrically connected with the catheter assembly through the catheter controller, and an analog hardware unit is arranged in the catheter controller, which is used for ultrasonic excitation and preprocessing of the ultrasonic echo signals received by the ultrasonic transducer.

10. The intravascular ultrasound imaging device of claim 9, wherein, The catheter controller is further provided with a retracting mechanism connected with the catheter assembly, which is used to drive the catheter assembly to move away from the blood vessel tissue.

11. The intravascular ultrasound imaging device of claim 5, wherein, The ultrasonic host further comprises a digital signal processing unit electrically connected with the displacement sensor, which is used to analyze the spatial position information of the displacement sensor.

12. The intravascular ultrasound imaging device of claim 11, wherein, The ultrasonic host further comprises an image processing and display unit electrically connected with the ultrasonic transducer and the digital signal processing unit respectively, which is used to realize the processing and display of the ultrasonic image based on the spatial position information output by the digital signal processing unit.

13. The intravascular ultrasound imaging device of claim 5, wherein, The ultrasonic host further comprises a timing control unit electrically connected with the driving member, the ultrasonic transducer and the magnetic field generating unit respectively, which is used to control the timing of the circumferential rotation of the driving member, the emission of ultrasonic wave pulse and the reception of ultrasonic echo signal of the ultrasonic transducer and the generation of magnetic field of the magnetic field generating unit.

14. The intravascular ultrasound imaging device of claim 5, wherein, The ultrasonic host further comprises a level conversion unit electrically connected with the ultrasonic transducer, which is used to match the level signals of the ultrasonic host and the ultrasonic transducer.

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