IVUS equipment and detection method and detection device of imaging assembly of IVUS equipment

Abstract

The invention provides IVUS equipment and a detection method and device for an imaging assembly of the IVUS equipment, and relates to the technical field of medical instruments. The imaging assembly comprises a catheter and at least one ultrasonic transducer fixedly arranged in the catheter, and the detection method comprises the steps that ultrasonic signals of the ultrasonic transducers are obtained; motion data of the catheter are detected and analyzed based on the ultrasonic signals, and the motion data comprise at least one of rotation data of the catheter and translation data of the catheter. Therefore, the movement data of the catheter is detected and analyzed based on the ultrasonic signal of the ultrasonic transducer, the movement state of the catheter is analyzed through the movement data of the catheter, data support is provided for operation analysis of components in the IVUS equipment, and the reliability of the IVUS equipment is improved. Meanwhile, the performance parameters of the ultrasonic transducer can be analyzed based on the ultrasonic signals, and the detection range of the detection method is expanded.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and more specifically, to a detection method and a detection device for an IVUS device and an imaging component thereof. Background Art

[0002] During the imaging process of the rotary intravascular ultrasound (IVUS) device, a motor is required to rotate the catheter in the IVUS device to form a complete cross-sectional image of the blood vessel. Since the ultrasonic transducer at the distal end of the catheter in the IVUS device is connected to the motor through a flexible drive rod, the user only knows the motion performance of the motor, but cannot know the motion performance of the catheter in the IVUS device (such as rotation speed, linear motion speed, etc.). Therefore, it is impossible to predict some abnormal motion states of the catheter in the IVUS device (such as non-uniform motion, catheter knotting, flexible drive rod breakage, etc.) and take protective actions in advance, which reduces the reliability of the IVUS device. Summary of the invention

[0003] In view of this, the present application provides a detection method and a detection device for an IVUS device and its imaging components, which effectively solve the technical problems existing in the prior art, obtain the movement state of the catheter by detecting and analyzing the movement data of the catheter, and provide data support for the operation analysis of the components in the IVUS device.

[0004] To achieve the above objectives, the technical solutions provided by this application are as follows:

[0005] A method for detecting an imaging component is used to detect an imaging component in an IVUS device, wherein the imaging component includes a catheter and at least one ultrasonic transducer fixedly disposed in the catheter, wherein the detection method includes:

[0006] Acquiring an ultrasonic signal from the ultrasonic transducer;

[0007] The motion data of the catheter is detected and analyzed based on the ultrasonic signal, wherein the motion data includes at least one of rotation data of the catheter and translation data of the catheter.

[0008] Optionally, the ultrasonic signal obtained is a sampled electrical signal obtained by a sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it;

[0009] The sensor is arranged opposite to the ultrasonic transducer in a direction perpendicular to the extension direction of the catheter;

[0010] The detection and analysis process of the rotation data includes:

[0011] The sampled electrical signal at the initial moment is recorded as the first sampled electrical signal;

[0012] Recording the sampled electrical signal that appears again and has the same frequency and amplitude as the first sampled electrical signal as the second sampled electrical signal;

[0013] Setting the sampling time interval between the first sampling electrical signal and the second sampling electrical signal to be one rotation recording cycle;

[0014] Acquire the sampling electrical signal with the maximum amplitude in the rotation recording period as the rotating target sampling electrical signal, wherein the rotating target sampling electrical signal has the same frequency as the first sampling electrical signal and the second sampling electrical signal;

[0015] Calculating the rotating target time interval between two adjacent rotating target sampling electrical signals;

[0016] calculating a rotational angular velocity of the catheter according to the rotational target time interval;

[0017] And / or, the detection and analysis process of the translation data includes:

[0018] The sampled electrical signal at the initial time is recorded as the third sampled electrical signal;

[0019] Recording the sampling electrical signal having the same frequency and the same amplitude as the third sampling electrical signal that appears again as a fourth sampling electrical signal;

[0020] Setting the sampling time interval between the third sampled electrical signal and the fourth sampled electrical signal to be a translation recording cycle;

[0021] The sampling electrical signal with the maximum amplitude within the translation recording period is obtained as the translation target sampling electrical signal, wherein the translation target sampling electrical signal has the same frequency as the third sampling electrical signal and the fourth sampling electrical signal;

[0022] Calculating the target translation time interval between two adjacent target translation sampled electrical signals, and calculating the voltage gain according to the amplitudes of the two adjacent target translation sampled electrical signals;

[0023] The translation speed of the catheter is calculated based on the voltage gain and the translation target time interval.

[0024] Optionally, after calculating the rotation angular velocity, the detection method further includes:

[0025] The rotation state of the catheter is detected according to a plurality of continuous change differences of the rotation angular velocities, wherein if the change difference is not greater than a set change difference, the rotation speed of the catheter is adjusted; if the change difference is greater than the set change difference, the catheter is controlled to stop rotating.

[0026] Optionally, the acquired ultrasonic signal is a sampled electrical signal obtained by a sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it; and in the extension direction of the catheter, the sensor includes a first collection area and a second collection area that are spaced apart;

[0027] The first acquisition area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a first area sampling electrical signal; the second acquisition area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a second area sampling electrical signal;

[0028] The detecting and analyzing the motion data of the catheter based on the ultrasonic signal comprises:

[0029] Detecting and analyzing first motion data of the catheter based on the first region sampled electrical signal corresponding to the ultrasonic signal, and detecting and analyzing second motion data of the catheter based on the second region sampled electrical signal corresponding to the ultrasonic signal;

[0030] Wherein, the detection method further comprises:

[0031] A comparison and analysis is performed on the first motion data and the second motion data.

[0032] Based on the same inventive concept, the present application also provides a detection device for an imaging component, which is used to detect an imaging component in an IVUS device, wherein the imaging component comprises: a catheter and at least one ultrasonic transducer, wherein the ultrasonic transducer is fixedly disposed in the catheter;

[0033] The detection device is used to collect the ultrasonic signal of the ultrasonic transducer, and detect and analyze the motion data of the catheter based on the ultrasonic signal, wherein the motion data includes at least one of the rotation data of the catheter and the translation data of the catheter.

[0034] Optionally, the detection device includes:

[0035] A sensor, arranged opposite to the ultrasonic transducer in a direction perpendicular to the extension direction of the catheter, and used for collecting the ultrasonic wave output by the ultrasonic transducer and converting it into the ultrasonic wave signal;

[0036] A processor is electrically connected to the sensor, and is used to detect and analyze motion data of the catheter based on the ultrasonic signal.

[0037] Optionally, the ultrasonic signal is a sampled electrical signal obtained by the sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it;

[0038] The process of the processor detecting and analyzing the rotation data includes: recording the sampling electrical signal at the initial moment as the first sampling electrical signal; recording the sampling electrical signal that appears again and has the same frequency and the same amplitude as the first sampling electrical signal as the second sampling electrical signal; setting the sampling time interval between the first sampling electrical signal and the second sampling electrical signal as a rotation recording cycle; obtaining the sampling electrical signal with the maximum amplitude within the rotation recording cycle as the rotation target sampling electrical signal, wherein the rotation target sampling electrical signal has the same frequency as the first sampling electrical signal and the second sampling electrical signal; calculating the rotation target time interval between two adjacent rotation target sampling electrical signals; and calculating the rotation angular velocity of the catheter according to the rotation target time interval;

[0039] And / or, the process of the processor detecting the translation data includes: recording the sampled electrical signal at the initial moment as a third sampled electrical signal; recording the sampled electrical signal that appears again and has the same frequency and the same amplitude as the third sampled electrical signal as a fourth sampled electrical signal; setting the sampling time interval between the third sampled electrical signal and the fourth sampled electrical signal as a translation recording cycle; obtaining the sampled electrical signal with the maximum amplitude within the translation recording cycle as a translation target sampling electrical signal, wherein the translation target sampling electrical signal has the same frequency as the third sampling electrical signal and the fourth sampling electrical signal; calculating the translation target time interval between two adjacent translation target sampling electrical signals, and calculating the voltage gain based on the amplitude of the two adjacent translation target sampling electrical signals; calculating the translation speed of the catheter based on the voltage gain and the translation target time interval.

[0040] Optionally, after calculating the rotational angular velocity, the processor is further used to: detect the rotation state of the catheter based on a change difference of a plurality of consecutive rotational angular velocities, wherein if the change difference is not greater than a set change difference, the rotational speed of the catheter is adjusted; if the change difference is greater than the set change difference, the catheter is controlled to stop rotating.

[0041] Optionally, the ultrasonic signal is a sampled electrical signal obtained by the sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it;

[0042] In the extension direction of the catheter, the sensor includes a first collection area and a second collection area arranged at intervals; the first collection area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a first area sampling electrical signal; the second collection area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a second area sampling electrical signal;

[0043] Wherein, the processor detects and analyzes the motion data of the catheter based on the ultrasonic signal, including: detecting and analyzing the first motion data of the catheter based on the first area sampling electrical signal corresponding to the ultrasonic signal, and detecting and analyzing the second motion data of the catheter based on the second area sampling electrical signal corresponding to the ultrasonic signal; and the processor is also used to compare and analyze the first motion data and the second motion data.

[0044] Based on the same inventive concept, the present application also provides an IVUS device, the IVUS device comprising:

[0045] Imaging components;

[0046] And, a detection device for the above-mentioned imaging component.

[0047] Compared with the prior art, the technical solution provided by this application has at least the following advantages:

[0048] The present application provides a detection method and a detection device for an IVUS device and its imaging component, wherein the imaging component includes a catheter and at least one ultrasonic transducer fixedly disposed in the catheter, wherein the detection method includes: acquiring an ultrasonic signal from the ultrasonic transducer; detecting and analyzing motion data of the catheter based on the ultrasonic signal, wherein the motion data includes at least one of rotation data of the catheter and translation data of the catheter. Thus, the motion data of the catheter is detected and analyzed based on the ultrasonic signal of the ultrasonic transducer, so that the motion state of the catheter is analyzed through the motion data of the catheter, providing data support for the operation analysis of the components in the IVUS device, and improving the reliability of the IVUS device. At the same time, the performance parameters of the ultrasonic transducer can also be analyzed based on the ultrasonic signal, thereby expanding the detection range of the detection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0050] Figure 1A flowchart of a method for detecting an imaging component provided in an embodiment of the present application;

[0051] Figure 2 A schematic diagram of the structure of an imaging component provided in an embodiment of the present application;

[0052] Figure 3 A flowchart of another imaging component detection method provided in an embodiment of the present application;

[0053] Figure 4 A flowchart of another imaging component detection method provided in an embodiment of the present application;

[0054] Figure 5 A flowchart of another imaging component detection method provided in an embodiment of the present application;

[0055] Figure 6 A schematic diagram of the structure of a sensor provided in an embodiment of the present application.

[0056] Reference numerals:

[0057] 100 - catheter; 200 - ultrasonic transducer; 310 - sensor; 311 - piezoelectric substrate; 312 - interdigital electrodes; 313 - first bus bar; 314 - second bus bar; 315 - sound absorbing material portion; 400 - sheath tube. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] As described in the background art, during the imaging process of a rotary intravascular ultrasound (IVUS) device, a motor is required to rotate the catheter in the IVUS device to form a complete cross-sectional image of the blood vessel. Since the ultrasonic transducer at the distal end of the catheter in the IVUS device is connected to the motor through a flexible drive rod, the user only knows the motion performance of the motor, but cannot know the motion performance of the catheter in the IVUS device (such as rotation speed, linear motion speed, etc.). Therefore, it is impossible to predict some abnormal motion states of the catheter in the IVUS device (such as non-uniform motion, catheter knotting, flexible drive rod breakage, etc.) and perform protective actions in advance, which reduces the reliability of the IVUS device.

[0060] At present, the detection of the operating status of the catheter of the IVUS device is mainly achieved by performing performance testing on the ultrasonic transducer fixed in the catheter. In the performance testing of the ultrasonic transducer, the common method is to use the echo reflected by the strong reflective medium to detect the acoustic field performance of the ultrasonic transducer, or to use a hydrophone to test the acoustic field performance of the ultrasonic transducer. For the method using a strong reflective medium, the ultrasonic transducer needs to be facing the strong reflective medium. Some ultrasonic transducers used for imaging are small in size, making the process of measuring the ultrasonic transducer cumbersome and inconvenient; and for the use of a hydrophone to test the performance of the ultrasonic transducer, due to the limitation of the hydrophone response frequency (<40MHz), high-frequency ultrasonic transducers cannot be detected.

[0061] Based on this, the embodiments of the present application provide a detection method and a detection device for an IVUS device and its imaging components, which effectively solve the technical problems existing in the prior art, obtain the movement state of the catheter by detecting and analyzing the movement data of the catheter, and provide data support for the operation analysis of the components in the IVUS device.

[0062] To achieve the above purpose, the technical solution provided in the embodiment of the present application is as follows, specifically combined with Figures 1 to 6 The technical solution provided in the embodiments of the present application is described in detail.

[0063] Combined with Figure 1 and Figure 2 As shown, Figure 1 A flowchart of a method for detecting an imaging component provided in an embodiment of the present application is provided. Figure 2 A schematic diagram of the structure of an imaging component provided in an embodiment of the present application. The detection method provided in the embodiment of the present application is used to detect the imaging component in the IVUS device. More specifically, the detection method is used to detect the motion state of the catheter in the imaging component. The imaging component includes a catheter 100, and at least one ultrasonic transducer 200 fixedly disposed in the catheter 100. When one ultrasonic transducer 200 is included, the IVUS device is a single-frequency device; when two different ultrasonic transducers 200 are included, the IUVS is a dual-frequency device; when three or more different ultrasonic transducers 200 are included, the IUVS is a multi-frequency device, and the present application does not make specific restrictions on this. Among them, the detection method provided in the embodiment of the present application includes:

[0064] S1. Acquire the ultrasonic signal of the ultrasonic transducer 200.

[0065] S2. Detect and analyze motion data of the catheter 100 based on the ultrasonic signal, wherein the motion data includes at least one of rotation data of the catheter 100 and translation data of the catheter.

[0066] As can be seen from the above content, the technical solution provided in the embodiment of the present application detects and analyzes the motion data of the catheter 100 based on the ultrasonic signal of the ultrasonic transducer 200, so as to analyze the motion state of the catheter 100 through the motion data of the catheter 100, and provides data support for the operation analysis of the components in the IVUS device, thereby improving the reliability of the IVUS device. Specifically, the abnormal motion of the catheter 100 can be corrected or protected according to the motion data of the catheter 100, and the motion position of the required detection end of the catheter 100 can be identified and recorded. The technical solution provided in the embodiment of the present application can not only detect the motion performance of the catheter of the IVUS device, but also detect the sound field performance of the ultrasonic transducer 200 of the IVUS device, that is, it can also analyze the performance parameters of the ultrasonic transducer 200 based on the ultrasonic signal, thereby expanding the detection range of the detection method.

[0067] In some embodiments, the embodiment of the present application can convert the ultrasonic wave output by the ultrasonic transducer 200 into an electrical signal, and then analyze and process the electrical signal to obtain motion data, and the ultrasonic wave can be collected by the sensor 310. That is, the ultrasonic signal obtained by the embodiment of the present application is a sampled electrical signal converted by the sensor 310 collecting the ultrasonic wave output by the ultrasonic transducer; in the direction Y perpendicular to the extension direction X of the catheter 100, the sensor 310 is arranged opposite to the ultrasonic transducer 200. Figure 3 As shown, it is a flow chart of another detection method of an imaging component provided in an embodiment of the present application, specifically a flow chart of a detection and analysis method of rotation data, wherein the detection and analysis process of the rotation data provided in the embodiment of the present application includes:

[0068] S211. Record the sampled electrical signal at the initial moment as a first sampled electrical signal.

[0069] S212: Record the sampled electrical signal that appears again and has the same frequency and amplitude as the first sampled electrical signal as the second sampled electrical signal.

[0070] S213, setting the sampling time interval between the first sampled electrical signal and the second sampled electrical signal to one rotation recording cycle.

[0071] S214. Acquire the sampling electrical signal with the maximum amplitude in the rotation recording period as a rotating target sampling electrical signal, wherein the rotating target sampling electrical signal has the same frequency as the first sampling electrical signal and the second sampling electrical signal.

[0072] S215, calculating the rotation target time interval between two adjacent rotation target sampling electrical signals.

[0073] S216 , calculating the rotation angular velocity of the catheter 100 according to the rotation target time interval.

[0074] It can be understood that the catheter 100 and / or the ultrasonic transducer 200 provided in the embodiment of the present application are connected to a driving device including a motor, and the driving device works to drive the catheter 100 to perform rotational motion and / or translational motion, wherein the rotational motion is to control the catheter 100 to rotate along an axis parallel to its extension direction X; and the translational motion is to control the catheter 100 to move along its extension direction X, such as controlling the catheter 100 to translate from the distal end to the proximal end along its extension direction X. While the catheter 100 rotates, the sensor 310 collects the ultrasonic waves output by the ultrasonic transducer 200 according to the set timing and converts them into sampling electrical signals. The sampling electrical signals converted by the sensor 310 are obtained, and the sampling electrical signals at the initial moment when the imaging component starts working are recorded as the first sampling electrical signals Vi1, and then when the sampling electrical signals with the same frequency and the same amplitude appear again, it indicates that the catheter 100 has rotated one circle, and the sampling electrical signals at this time are recorded as the second sampling electrical signals Vi2, and the sampling time interval between the first sampling electrical signals Vi1 and the second sampling electrical signals Vi2 is a rotation recording cycle. Continue to obtain the sampled electrical signal output by the sensor 310, and determine the sampled electrical signal with the largest amplitude in a rotation recording cycle as the rotation target sampled electrical signal Vxmax (the frequency of the rotation target sampled electrical signal Vxmax is the same as the frequency of the first sampled electrical signal and the second sampled electrical signal), and then calculate the time interval between two adjacent rotation target sampled electrical signals Vxmax as the rotation target time interval Tr, which is the time taken for the catheter 100 to rotate one circle. The rotation angular velocity of the catheter 100 is calculated based on the rotation target time interval Tr as 2π / Tr. Among them, when the ultrasonic transducer 200 rotates to face the sensor 310, the amplitude of the sampled electrical signal is the largest; that is, the sampled electrical signal with the largest amplitude provided by the embodiment of the present application is the ultrasonic wave collected when the sensor 310 faces the ultrasonic transducer 200.

[0075] Furthermore, after the rotation angular velocity is calculated, the rotation state of the catheter 100 may also be detected.

[0076] refer to Figure 4 As shown, the detection method provided in another embodiment of the present application further includes:

[0077] S217. Detect the rotation state of the catheter 100 according to the continuous change differences of the rotation angular velocities. If the change difference is not greater than the set change difference, adjust the rotation speed of the catheter 100 so that the catheter 100 rotates at a uniform speed. If the change difference is greater than the set change difference, control the catheter 100 to stop rotating, so as to ensure the high safety of the equipment.

[0078] refer to Figure 5 As shown, it is a flow chart of another detection method of an imaging component provided in an embodiment of the present application, specifically a flow chart of a detection and analysis method of translation data. Similarly, the ultrasonic signal acquired in the embodiment of the present application is a sampled electrical signal converted by the sensor 310 collecting the ultrasonic wave output by the ultrasonic transducer; in the direction Y perpendicular to the extension direction X of the catheter 100, the sensor 310 and the part of the catheter 100 corresponding to the ultrasonic transducer 200 are arranged relative to each other. Among them, the detection and analysis process of the translation data provided in the embodiment of the present application includes:

[0079] S221. Record the sampled electrical signal at the initial moment as a third sampled electrical signal.

[0080] S222: Record the sampled electrical signal that appears again and has the same frequency and amplitude as the third sampled electrical signal as a fourth sampled electrical signal.

[0081] S223, setting the sampling time interval between the third sampled electrical signal and the fourth sampled electrical signal to a translation recording period.

[0082] S224. Acquire the sampled electrical signal with the maximum amplitude within the translation recording period as a translation target sampled electrical signal, wherein the translation target sampled electrical signal has the same frequency as the third sampled electrical signal and the fourth sampled electrical signal.

[0083] S225, calculating the target translation time interval between two adjacent target translation sampled electrical signals, and calculating the voltage gain according to the amplitudes of the two adjacent target translation sampled electrical signals.

[0084] S226 , calculating the translation speed of the catheter 100 according to the voltage gain and the translation target time interval.

[0085] It can be understood that the catheter 100 and / or the ultrasonic transducer 200 provided in the embodiment of the present application are connected to a driving device including a motor, and the driving device works to drive the catheter 100 to perform rotational motion and / or translational motion, wherein the rotational motion is to control the catheter 100 to rotate along an axis parallel to its extension direction X; and the translational motion is to control the catheter 100 to move along its extension direction X, such as controlling the catheter 100 to translate from the distal end to the proximal end along its extension direction X. During the translation process of the driving catheter 100, the catheter 100 is controlled to rotate at the same time, and the sensor 310 collects the ultrasonic wave output by the ultrasonic transducer 200 according to the set timing and converts it into a sampling electrical signal. Among them, the length of the sensor 310 provided in the embodiment of the present application in the extension direction X is greater than the translation distance of the ultrasonic transducer 200 in the extension direction X, and the translation distance of the ultrasonic transducer 200 is within the length range of the sensor 310, ensuring that the sensor 310 can collect the ultrasonic wave output by the ultrasonic transducer 200 during the translation process. Since the propagation speed of ultrasound in sensor 310 is fixed, such as when sensor 310 is a piezoelectric sensor, the material of the piezoelectric substrate is determined, and the propagation speed of ultrasound in the piezoelectric collection is fixed. However, during the translation process, the position of the ultrasonic transducer away from the collection area of ​​sensor 310 will change, and the intensity of the ultrasound will change with the distance. According to the type of sensor 310, it can be determined that the change relationship of the electrical signal caused by the change of ultrasound intensity with distance is AdB / mm. In addition, when sensor 310 is a piezoelectric sensor, the forked electrodes of different response frequencies are arranged at both ends of the ultrasonic transducer, so when the ultrasonic transducer is working, the attenuation amplitude of the electrical signal received by the distal forked electrode of sensor 310 and the gain amplitude of the signal of the same frequency received by the proximal forked electrode are consistent, so the translation speed can be calculated by referring to the voltage gain and the parameters of the electrical signal change caused by the change of ultrasound intensity with distance. Specifically, in the process of translation data detection, the sampled electrical signal converted by the sensor 310 is obtained, the sampled electrical signal at the initial moment when the imaging component starts working is recorded as the third sampled electrical signal Vi3, and then the sampled electrical signal with the same frequency and amplitude as the third sampled electrical signal Vi3 is recorded again as the fourth sampled electrical signal Vi4. The sampling time interval between the third sampled electrical signal Vi3 and the fourth sampled electrical signal Vi4 is set as a translation recording cycle.Continue to obtain the sampled electrical signals output by the sensor 310, and determine the sampled electrical signal with the maximum amplitude in a translation recording cycle as the translation target sampled electrical signal Vpmax (the translation target sampled electrical signal Vpmax has the same frequency as the third sampled electrical signal Vi3 and the fourth sampled electrical signal Vi4), then calculate the translation target time interval △t1 between two adjacent translation target sampled electrical signals Vpmax, and calculate the voltage gain K as K=20lg(X / Y) based on the amplitudes of the two adjacent translation target sampled electrical signals Vpmax, where X is the amplitude of the previous translation target sampled electrical signal Vpmax, and Y is the amplitude of the next translation target sampled electrical signal Vpmax. Finally, calculate the translation distance Z=K / A of the catheter 100 based on the voltage gain K and the electrical signal change AdB / mm caused by the ultrasonic intensity changing with the distance, and calculate the translation speed V=Z / △t1 of the catheter based on the translation distance Z and the translation target time interval △t1, where the speed V is the translation speed excluding the influence of the rotation of the catheter 100.

[0086] It should be noted that the detection and analysis process of motion data provided in the embodiment of the present application can be implemented by selecting at least one of the detection and analysis process of rotation data and the detection and analysis process of translation data. In some other embodiments of the present application, other detection and analysis processes can also be used to implement the detection of motion data, and the present application does not make specific restrictions on this.

[0087] In some embodiments, the sensor 310 provided in the embodiment of the present application may be a piezoelectric sensor, and the piezoelectric sensor includes a piezoelectric substrate and an interdigital transducer thereon. Figure 6 As shown, it is a schematic diagram of the structure of a sensor provided in an embodiment of the present application, wherein the sensor 310 is a piezoelectric sensor, and the piezoelectric sensor includes a piezoelectric substrate 311 and an interdigital transducer thereon. The interdigital transducer includes a plurality of metal interdigital electrodes 312 that cross each other, and the interdigital electrodes 312 are alternately electrically connected to the first bus bar 313 and the second bus bar 314. a is the width of the interdigital electrode 312, and b is the gap between the interdigital electrodes 312. Two interdigital electrodes 312 and two spaced electrodes form a single-finger transducer, and its width is the wavelength of the surface wave, that is, the surface wave wavelength λ=2a+2b. The widths of different interdigital electrodes 312 provided in the embodiment of the present application can be the same or different, and the gaps between the interdigital electrodes 312 can be the same or different. By optimizing the width and gap of the interdigital electrodes 312, the piezoelectric sensor can realize the ultrasonic acquisition function of a single-frequency, dual-frequency or multi-frequency IVUS device.

[0088] Specifically, the IUVS device provided in the embodiment of the present application can realize single-frequency, dual-frequency or multi-frequency functions. The IVUS device (single-frequency, dual-frequency, multi-frequency) is an ultrasonic transducer 200 that emits an ultrasonic imaging of a fixed frequency. In order for the sensor 310 to receive the maximum signal from the ultrasonic transducer 200, the interdigital transducers constituting the sensor 310 need to operate in a resonant state. Since the material of the piezoelectric substrate 311 of the sensor 310 is certain, the propagation speed of the ultrasonic wave generated by the ultrasonic transducer 200 on the sensor 310 is certain. Therefore, for ultrasonic transducers 200 with different transmission frequencies, the sensor 310 can integrate multiple different single-finger transducers (the interdigital electrodes 312 of different single-finger transducers have different widths and / or the gaps between the interdigital electrodes 312 are different), which can generate maximum signals at different transmission frequencies. When the ultrasonic transducer 200 is working, it emits ultrasonic waves, which are transmitted to the piezoelectric substrate 311 of the sensor 310. The piezoelectric substrate 311 is deformed to generate an electrical signal. The single-finger transducer with the same frequency as the ultrasonic transducer 200 receives the strongest electrical signal, and transmits the signal to the corresponding processor through the bus bar. The processor detects the motion data of the catheter 100 and / or the sound field performance of the ultrasonic transducer 200 based on the sampled electrical signal. Further, the piezoelectric sensor provided in the embodiment of the present application can also include a sound absorbing material portion 315 located at the end of the piezoelectric substrate 311, which improves the performance of the piezoelectric sensor.

[0089] In some embodiments, the sensor 310 provided in the embodiment of the present application includes two collection areas, namely a first collection area and a second collection area. The first collection area and the second collection area both collect ultrasonic waves, and motion data is detected according to the ultrasonic signals collected by the two collection areas. The two results of the analysis and detection can be compared and verified with each other to improve the accuracy of the detection. Optionally, the first collection area and the second collection area can be symmetrically arranged about the axis between the two, and the first collection area and the second collection area can be single-frequency, dual-frequency or multi-frequency collection areas; when the first collection area and the second collection area are dual-frequency or multi-frequency collection areas, the sub-collection areas of the same frequency are also symmetrically arranged about the axis between the first collection area and the second collection area. That is, the ultrasonic signal obtained in the embodiment of the present application is a sampled electrical signal converted by the sensor 310 from the ultrasonic wave output by the ultrasonic transducer 200; and, in the extension direction X of the catheter 100, the sensor 310 includes a first collection area and a second collection area arranged at intervals; the first collection area is used to collect the ultrasonic wave output by the ultrasonic transducer 200 and convert it into a first area sampled electrical signal; the second collection area is used to collect the ultrasonic wave output by the ultrasonic transducer 200 and convert it into a second area sampled electrical signal; the detection and analysis of the motion data of the catheter 100 based on the ultrasonic signal includes: detecting and analyzing the first motion data of the catheter based on the first area sampled electrical signal corresponding to the ultrasonic signal, and detecting and analyzing the second motion data of the catheter based on the second area sampled electrical signal corresponding to the ultrasonic signal; wherein the detection method also includes: comparing and analyzing the first motion data and the second motion data to improve the accuracy of the detection.

[0090] Continue to refer Figure 6 As shown, when the sensor 310 provided in the embodiment of the present application is a piezoelectric sensor, the piezoelectric sensor includes a first acquisition area A1 and a second acquisition area A2 arranged along the extension direction X of the catheter 100, and the first acquisition area A1 and the second acquisition area A2 are formed with respective corresponding interdigital transducers on the piezoelectric substrate 311, and the interdigital transducers are symmetrical about the axis between the first acquisition area A1 and the second acquisition area A2, and the axis is perpendicular to the extension direction X. Among them, when the interdigital transducers of the first acquisition area A1 include different single-finger transducers corresponding to dual-frequency or multi-frequency, and the interdigital transducers of the second acquisition area A2 include different single-finger transducers corresponding to dual-frequency or multi-frequency, the single-finger transducers with the same frequency in the first acquisition area A1 and the second acquisition area A2 can be symmetrical about the axis. In some other embodiments of the present application, the single-finger transducers with the same frequency in the first acquisition area A1 and the second acquisition area A2 can also be not symmetrical about the axis, and the present application does not make specific restrictions on this.

[0091] Based on the same inventive concept, the embodiment of the present application also provides a detection device for an imaging component, which is used to detect the imaging component in the IVUS device. Figure 2 As shown, the imaging assembly provided in the embodiment of the present application includes: a catheter 100; and at least one ultrasonic transducer 200, wherein the ultrasonic transducer 200 is fixedly disposed in the catheter 100. The detection device provided in the embodiment of the present application is used to collect ultrasonic signals from the ultrasonic transducer 200, and detect and analyze motion data of the catheter 100 based on the ultrasonic signals, wherein the motion data includes at least one of rotation data of the catheter 100 and translation data of the catheter.

[0092] As can be seen from the above content, the technical solution provided in the embodiment of the present application detects and analyzes the motion data of the catheter 100 based on the ultrasonic signal of the ultrasonic transducer 200, so as to analyze the motion state of the catheter 100 through the motion data of the catheter 100, and provides data support for the operation analysis of the components in the IVUS device, thereby improving the reliability of the IVUS device. Specifically, the abnormal motion of the catheter 100 can be corrected or protected according to the motion data of the catheter 100, and the motion position of the catheter 100 can be identified and recorded. The technical solution provided in the embodiment of the present application can not only detect the motion performance of the catheter of the IVUS device, but also detect the sound field performance of the ultrasonic transducer 200 of the IVUS device, that is, it can also analyze the performance parameters of the ultrasonic transducer 200 based on the ultrasonic signal, thereby expanding the detection range.

[0093] Continue to refer Figure 2 As shown, the detection device provided in the embodiment of the present application includes a sensor 310, and in the direction Y perpendicular to the extension direction X of the catheter 100, the sensor 310 is arranged relative to the ultrasonic transducer 200, and the sensor 310 is used to collect the ultrasonic waves output by the ultrasonic transducer 200 and convert them into the ultrasonic signal. The imaging component can also include a sheath 400 that wraps the catheter 100, and the sensor 310 can be integrated in the sheath 400. The detection device also includes a processor (not shown), and the processor is electrically connected to the sensor 310, such as the processor and the sensor 310 can be electrically connected through a cable. The processor is used to detect and analyze the motion data of the catheter 100 based on the ultrasonic signal. In addition, the processor can also analyze the performance parameters of the ultrasonic transducer 200 based on the ultrasonic signal to expand the detection range.

[0094] In some embodiments, the ultrasonic signal provided in the embodiments of the present application is a sampled electrical signal that is collected by the sensor 310 and converted from the ultrasonic wave output by the ultrasonic transducer 200; the process of the processor detecting and analyzing the rotation data includes: recording the sampled electrical signal at the initial moment as a first sampled electrical signal; recording the sampled electrical signal that appears again and has the same frequency and amplitude as the first sampled electrical signal as a second sampled electrical signal; setting the sampling time interval between the first sampled electrical signal and the second sampled electrical signal to a rotation recording cycle; obtaining the sampled electrical signal with the maximum amplitude within the rotation recording cycle as a rotation target sampling electrical signal, wherein the rotation target sampling electrical signal has the same frequency as the first sampling electrical signal and the second sampling electrical signal; calculating the rotation target time interval between two adjacent rotation target sampling electrical signals; and calculating the rotation angular velocity of the catheter 100 according to the rotation target time interval.

[0095] Furthermore, after calculating the rotational angular velocity, the processor provided in the embodiment of the present application is also used to: detect the rotation state of the catheter 100 according to the change difference of a plurality of consecutive rotational angular velocities, wherein if the change difference is not greater than the set change difference, adjust the rotation speed of the catheter 100 so that the catheter 100 rotates at a uniform speed; if the change difference is greater than the set change difference, control the catheter 100 to stop rotating, thereby ensuring high safety in the use of the device.

[0096] In addition, the process of the processor provided in the embodiment of the present application detecting the translation data includes: recording the sampled electrical signal at the initial moment as a third sampled electrical signal; recording the sampled electrical signal that appears again and has the same frequency and the same amplitude as the third sampled electrical signal as a fourth sampled electrical signal; setting the sampling time interval between the third sampled electrical signal and the fourth sampled electrical signal as a translation recording cycle; obtaining the sampled electrical signal with the maximum amplitude within the translation recording cycle as a translation target sampling electrical signal, wherein the translation target sampling electrical signal has the same frequency as the third sampling electrical signal and the fourth sampling electrical signal; calculating the translation target time interval between two adjacent translation target sampling electrical signals, and calculating the voltage gain based on the amplitude of the two adjacent translation target sampling electrical signals; calculating the translation speed of the catheter 100 based on the voltage gain and the translation target time interval.

[0097] It should be noted that the detection and analysis process of motion data provided in the embodiment of the present application can be implemented by selecting at least one of the detection and analysis process of rotation data and the detection and analysis process of translation data. In some other embodiments of the present application, other detection and analysis processes can also be used to implement the detection of motion data, and the present application does not make specific restrictions on this.

[0098] In some embodiments, the ultrasonic signal provided in the embodiments of the present application is a sampled electrical signal converted by the sensor 310 from the ultrasonic wave output by the ultrasonic transducer 200; in the extension direction X of the catheter 100, the sensor 310 includes a first collection area and a second collection area arranged at intervals; the first collection area is used to collect the ultrasonic wave output by the ultrasonic transducer 200 and convert it into a first area sampled electrical signal; the second collection area is used to collect the ultrasonic wave output by the ultrasonic transducer 200 and convert it into a second area sampled electrical signal; wherein the processor detects and analyzes the motion data of the catheter based on the ultrasonic signal, including: detecting and analyzing the first motion data of the catheter based on the first area sampled electrical signal corresponding to the ultrasonic signal, and detecting and analyzing the second motion data of the catheter based on the second area sampled electrical signal corresponding to the ultrasonic signal; and the processor is also used to compare and analyze the first motion data and the second motion data to improve the accuracy of detection.

[0099] The sensor 310 provided in the embodiment of the present application may be a piezoelectric sensor, wherein the specific structure and function of the piezoelectric sensor may be as follows: Figure 6 The description of the sensor 310 in the structure shown and the above-mentioned related embodiments will not be repeated in this application.

[0100] Based on the same inventive concept, an embodiment of the present application further provides an IVUS device, which includes: an imaging component; and a detection device for the imaging component provided by any one of the above embodiments.

[0101] The embodiment of the present application provides a detection method and a detection device for an IVUS device and its imaging component, wherein the imaging component includes a catheter and at least one ultrasonic transducer fixedly disposed in the catheter, wherein the detection method includes: acquiring an ultrasonic signal from the ultrasonic transducer; detecting and analyzing motion data of the catheter based on the ultrasonic signal, wherein the motion data includes at least one of rotation data of the catheter and translation data of the catheter. Thus, the motion data of the catheter is detected and analyzed based on the ultrasonic signal of the ultrasonic transducer, so that the motion state of the catheter is analyzed through the motion data of the catheter, providing data support for the operation analysis of the components in the IVUS device, and improving the reliability of the IVUS device. At the same time, the performance parameters of the ultrasonic transducer can also be analyzed based on the ultrasonic signal, thereby expanding the detection range of the detection method.

[0102] In the description of the embodiments of the present application, it needs to be understood that the orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0103] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the embodiments of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0104] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0105] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0106] In the embodiments of the present application, if the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" appear, it means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradicting each other.

[0107] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for detecting an imaging component, for detecting an imaging component in an IVUS device, characterized in that: The imaging assembly includes a catheter, and at least one ultrasonic transducer fixedly disposed in the catheter, wherein the detection method includes: Acquiring an ultrasonic signal from the ultrasonic transducer; The motion data of the catheter is detected and analyzed based on the ultrasonic signal, wherein the motion data includes at least one of rotation data of the catheter and translation data of the catheter.

2. The method for detecting an imaging component according to claim 1, characterized in that: The ultrasonic signal obtained is a sampled electrical signal obtained by the sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it; The sensor is arranged opposite to the ultrasonic transducer in a direction perpendicular to the extension direction of the catheter; The detection and analysis process of the rotation data includes: The sampled electrical signal at the initial moment is recorded as the first sampled electrical signal; Recording the sampled electrical signal that appears again and has the same frequency and amplitude as the first sampled electrical signal as the second sampled electrical signal; Setting the sampling time interval between the first sampling electrical signal and the second sampling electrical signal to be one rotation recording cycle; Acquire the sampling electrical signal with the maximum amplitude in the rotation recording period as the rotating target sampling electrical signal, wherein the rotating target sampling electrical signal has the same frequency as the first sampling electrical signal and the second sampling electrical signal; Calculating the rotating target time interval between two adjacent rotating target sampling electrical signals; calculating a rotational angular velocity of the catheter according to the rotational target time interval; And / or, the detection and analysis process of the translation data includes: The sampled electrical signal at the initial time is recorded as the third sampled electrical signal; Recording the sampling electrical signal having the same frequency and the same amplitude as the third sampling electrical signal that appears again as a fourth sampling electrical signal; Setting the sampling time interval between the third sampled electrical signal and the fourth sampled electrical signal to be a translation recording cycle; The sampling electrical signal with the maximum amplitude within the translation recording period is obtained as the translation target sampling electrical signal, wherein the translation target sampling electrical signal has the same frequency as the third sampling electrical signal and the fourth sampling electrical signal; Calculating the target translation time interval between two adjacent target translation sampled electrical signals, and calculating the voltage gain according to the amplitudes of the two adjacent target translation sampled electrical signals; The translation speed of the catheter is calculated based on the voltage gain and the translation target time interval.

3. The method for detecting an imaging component according to claim 2, characterized in that: After the rotation angular velocity is calculated, the detection method further includes: The rotation state of the catheter is detected according to a plurality of continuous change differences of the rotation angular velocities, wherein if the change difference is not greater than a set change difference, the rotation speed of the catheter is adjusted; if the change difference is greater than the set change difference, the catheter is controlled to stop rotating.

4. The method for detecting an imaging component according to claim 1, characterized in that: The acquired ultrasonic signal is a sampled electrical signal obtained by the sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it; and in the extension direction of the catheter, the sensor includes a first collection area and a second collection area that are spaced apart; The first acquisition area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a first area sampling electrical signal; the second acquisition area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a second area sampling electrical signal; The detecting and analyzing the motion data of the catheter based on the ultrasonic signal comprises: Detecting and analyzing first motion data of the catheter based on the first region sampled electrical signal corresponding to the ultrasonic signal, and detecting and analyzing second motion data of the catheter based on the second region sampled electrical signal corresponding to the ultrasonic signal; Wherein, the detection method further comprises: A comparison and analysis is performed on the first motion data and the second motion data.

5. An imaging component detection device, used for detecting an imaging component in an IVUS device, characterized in that: The imaging assembly comprises: a catheter and at least one ultrasonic transducer, wherein the ultrasonic transducer is fixedly disposed in the catheter; The detection device is used to collect the ultrasonic signal of the ultrasonic transducer, and detect and analyze the motion data of the catheter based on the ultrasonic signal, wherein the motion data includes at least one of the rotation data of the catheter and the translation data of the catheter.

6. The detection device of the imaging assembly according to claim 5, characterized in that: The detection device comprises: A sensor, arranged opposite to the ultrasonic transducer in a direction perpendicular to the extension direction of the catheter, and used for collecting the ultrasonic wave output by the ultrasonic transducer and converting it into the ultrasonic wave signal; A processor is electrically connected to the sensor, and is used to detect and analyze motion data of the catheter based on the ultrasonic signal.

7. The detection device of the imaging assembly according to claim 6, characterized in that: The ultrasonic signal is a sampled electrical signal obtained by the sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it; The process of the processor detecting and analyzing the rotation data includes: recording the sampling electrical signal at the initial moment as the first sampling electrical signal; recording the sampling electrical signal that appears again and has the same frequency and the same amplitude as the first sampling electrical signal as the second sampling electrical signal; setting the sampling time interval between the first sampling electrical signal and the second sampling electrical signal as a rotation recording cycle; obtaining the sampling electrical signal with the maximum amplitude within the rotation recording cycle as the rotation target sampling electrical signal, wherein the rotation target sampling electrical signal has the same frequency as the first sampling electrical signal and the second sampling electrical signal; calculating the rotation target time interval between two adjacent rotation target sampling electrical signals; and calculating the rotation angular velocity of the catheter according to the rotation target time interval; And / or, the process of the processor detecting the translation data includes: recording the sampled electrical signal at the initial moment as a third sampled electrical signal; recording the sampled electrical signal that appears again and has the same frequency and the same amplitude as the third sampled electrical signal as a fourth sampled electrical signal; setting the sampling time interval between the third sampled electrical signal and the fourth sampled electrical signal as a translation recording cycle; obtaining the sampled electrical signal with the maximum amplitude within the translation recording cycle as a translation target sampling electrical signal, wherein the translation target sampling electrical signal has the same frequency as the third sampling electrical signal and the fourth sampling electrical signal; calculating the translation target time interval between two adjacent translation target sampling electrical signals, and calculating the voltage gain based on the amplitude of the two adjacent translation target sampling electrical signals; calculating the translation speed of the catheter based on the voltage gain and the translation target time interval.

8. The detection device of the imaging assembly according to claim 7, characterized in that: After calculating the rotational angular velocity, the processor is further configured to: detect the rotational state of the catheter according to a plurality of continuous change differences of the rotational angular velocities, wherein if the change difference is not greater than a set change difference, the rotational speed of the catheter is adjusted; if the change difference is greater than the set change difference, the catheter is controlled to stop rotating.

9. The detection device of the imaging assembly according to claim 6, characterized in that: The ultrasonic signal is a sampled electrical signal obtained by the sensor collecting the ultrasonic wave output by the ultrasonic transducer and converting it; In the extension direction of the catheter, the sensor includes a first collection area and a second collection area arranged at intervals; the first collection area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a first area sampling electrical signal; the second collection area is used to collect the ultrasonic wave output by the ultrasonic transducer and convert it into a second area sampling electrical signal; Wherein, the processor detects and analyzes the motion data of the catheter based on the ultrasonic signal, including: detecting and analyzing the first motion data of the catheter based on the first area sampling electrical signal corresponding to the ultrasonic signal, and detecting and analyzing the second motion data of the catheter based on the second area sampling electrical signal corresponding to the ultrasonic signal; and the processor is also used to compare and analyze the first motion data and the second motion data.

10. An IVUS device, characterized in that: The IVUS device includes: Imaging components; And, a detection device for the imaging assembly as described in any one of claims 5-9.

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