System for realizing catheter and OCT data synchronization

Abstract

The utility model discloses a system for realizing catheter and OCT (optical coherence tomography) data synchronization. The system comprises an MCU (microprogrammed control unit), a light source, a motor and an imaging catheter, the light source is connected with the motor through the imaging conduit, and the MCU, the light source and the motor are electrically connected; the MCU control unit is further connected with an optical encoder in the motor and used for receiving signals of the optical encoder to judge whether the rotating speed frequency of the motor is consistent with the frequency of the light source or not, and rotation of the imaging guide pipe is matched with the frequency of the light source through PID algorithm compensation. The system can achieve synchronization of catheter rotation and OCT data collection, it is guaranteed that image information in a blood vessel is completely presented through processed data, and the diagnosis precision is improved.

Description

Technical Field

[0001] The utility model belongs to the field of intravascular image detection, and particularly relates to a system for realizing the synchronization of a catheter and OCT data. Background Art

[0002] Optical Coherence Tomography (OCT) is currently the imaging technology with the highest resolution and is the new "gold standard" for diagnosing coronary heart disease. OCT detection places an imaging catheter with an optical lens at the head end in the coronary artery. By rotating and retracting at high speed, it can help diagnose the structure and plaque properties inside the blood vessel clearly in less than 3 seconds, just like putting the eyes directly into the blood vessel to see. The whole diagnostic process is very safe and reliable. However, the current motor speed and the frequency of the light source cannot be accurately synchronized, resulting in data loss during the catheter detection process, which will affect the doctor's judgment on the structure and plaque properties inside the blood vessel. Summary of the Invention

[0003] Utility Model Objective: The technical problem to be solved by the utility model is to provide a system for realizing the synchronization of a catheter and OCT data in view of the deficiencies of the prior art, which can ensure the synchronization of catheter rotation and data acquisition and improve the diagnostic accuracy.

[0004] In order to achieve the above object, the technical solution adopted by the utility model is as follows:

[0005] A system for realizing the synchronization of a catheter and OCT data includes an MCU control unit, a light source, a motor, and an imaging catheter; the light source is connected to the motor through the imaging catheter, and the MCU control unit, the light source, and the motor are electrically connected; the MCU control unit is also connected to the optical encoder in the motor for receiving the optical encoder signal and controlling the motor speed to make the rotation of the imaging catheter match the frequency of the light source.

[0006] Specifically, the MCU control unit is an ARM series processor.

[0007] Specifically, the light source is used to provide an imaging light source and a Trig level signal, and the level signal is a TTL level.

[0008] Specifically, the motor is a brushless DC motor and contains an optical encoder signal inside.

[0009] Specifically, the optical encoder provides a TTL level signal output.

[0010] Specifically, the imaging catheter is an intravascular imaging catheter, contains optical fibers inside, is structurally connected to the motor, and is driven by the motor to rotate.

[0011] Furthermore, in the MCU control unit, a judgment module is provided for judging whether the motor rotation speed frequency is consistent with the light source frequency.

[0012] Preferably, the MCU control unit realizes the mutual matching of the motor rotation speed and the light source frequency through the existing fuzzy PID control algorithm. The fuzzy PID control algorithm is an algorithm that performs control according to the proportional (P), integral (I), and derivative (D) of the deviation. It has a simple structure, good stability, reliable operation, and convenient adjustment, and is commonly used in the field of industrial control. The fuzzy PID control algorithm of the present invention draws on the existing technical paper, Wu Junbo. Application of Fuzzy PID Control in Locomotive Speed Control, 2021. This existing technology describes that fuzzy PID is superior to traditional PID and has been applied in locomotive speed control.

[0013] Preferably, the motor rotation speed is controlled at 1500 rpm to 6000 rpm.

[0014] Preferably, the light source frequency is controlled at 50 kHz to 100 kHz. Beneficial Effects

[0015] The present invention uses the fuzzy PID control algorithm to synchronize the OCT data and the catheter, which can ensure the synchronization of catheter rotation and data acquisition, ensure the integrity of the processed data to present the image information in the blood vessel, and can greatly improve the doctor's judgment accuracy of the lesion. Description of the Drawings

[0016] The following further specifically describes the present utility model in conjunction with the drawings and specific embodiments, and the above and / or other advantages of the present utility model will become clearer.

[0017] Figure 1 is the composition diagram of the system of the present utility model.

[0018] Figure 2 is the schematic diagram of the implementation of the present utility model.

[0019] Figure 3 is the circuit diagram of the MCU control unit in the system of the present utility model.

[0020] Figure 4 is the circuit diagram of the motor module in the system of the present utility model.

[0021] Figure 5 is the circuit diagram of the light source module in the system of the present utility model. Detailed Embodiments

[0022] According to the following embodiments, the present utility model can be better understood.

[0023] The structures, proportions, sizes, etc. shown in the accompanying drawings of the specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "front", "rear", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the implementation scope of the present utility model. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the implementable scope of the present utility model.

[0024] Combined Figure 1 As shown, the system of the present utility model for realizing the synchronization of the catheter and OCT data includes an MCU control unit 1, a light source 2, a motor 3, and an imaging catheter 4; the light source is connected to the motor through the imaging catheter, and the MCU control unit 1, the light source 2, and the motor 3 are electrically connected; the MCU control unit 1 is also connected to the optical encoder in the motor 2 for receiving the optical encoder signal and controlling the rotation speed of the motor 3 to achieve the matching of the rotation of the imaging catheter 4 and the frequency of the light source 2.

[0025] In this embodiment, the MCU control unit is an ARM series processor.

[0026] In this embodiment, the light source is used to provide an imaging light source and a Trig level signal, and the level signal is a TTL level.

[0027] In this embodiment, the motor is a brushless DC motor, and an optical encoder signal is included inside.

[0028] In this embodiment, the optical encoder provides a TTL level signal output.

[0029] In this embodiment, the imaging catheter is an intravascular imaging catheter, and an optical fiber is included inside, which is structurally connected to the motor, and the rotation of the imaging catheter is driven by the motor.

[0030] In this embodiment, in the MCU control unit, a judgment module is provided for judging whether the rotation speed frequency of the motor is consistent with the frequency of the light source.

[0031] In this embodiment, the MCU control unit realizes the matching of the rotation speed of the motor and the frequency of the light source through the existing fuzzy PID control algorithm. The fuzzy PID control algorithm draws on the existing technical paper, Wu Junbo. Application of Fuzzy PID Control in Locomotive Speed Control, 2021. This existing technology describes that fuzzy PID is superior to traditional PID and has been applied in locomotive speed control.

[0032] Preferably, the rotational speed of the motor is controlled within 1500 rpm to 6000 rpm.

[0033] Preferably, the frequency of the light source is controlled at 50 kHz.

[0034] Figure 2 is the principle for the system of the present utility model to achieve the synchronization of the catheter and OCT data. Figure 3 is the circuit diagram of the MCU control unit in the system of the present utility model. Figure 4 is the circuit diagram of the motor module. Figure 5 is the circuit diagram of the light source module. The MCU control unit receives the trigger signal Trig from the light source. Each Trig signal corresponds to the data in that direction, which is the A-scan. Its corresponding cycle time is fixed. The positional PID is adopted, and its formula is as follows:

[0035]

[0036] Among them, the variable is the difference before and after each time. The motor itself has an encoder signal. The I signal is the trigger signal indicating that the motor rotates one circle. However, under the condition of a fixed motor rotational speed, when the motor rotates one circle, it corresponds to 1 B-scan. Each B-sacn is composed of a fixed number of light source Trig signals A-sacn. The data corresponding to this signal constitutes the blood vessel data of one circle at a single point position, and this data is assembled into 1 blood vessel image. Considering the establishment of the connection between the light source signal and the motor signal, the positional PID is introduced. The time difference between the motor rotating one circle and a fixed number of Trig is used as the time difference at this position as the variable, corresponding to the time relationship at a single point position. When the time difference is greater than a certain threshold, it indicates that the rotational speed and the image are not synchronized, and the current rotational speed needs to be adjusted. The whole process is a dynamic change. At a fixed rotational speed, when the motor rotates one circle, it corresponds to a time t1 of the encoder. Each B-sacn corresponds to a time t2. The time difference between these two times e(t) = t1 - t2. Among them, the finally calibrated time difference is converted into a rotational speed and sent to the motor by the MCU. Among them, the calibrated rotational speed is fed back to the MCU controller for difference confirmation. The difference meets the actual requirements, so as to achieve the synchronization of the catheter data and the OCT data. The above-mentioned fuzzy PID control algorithm adopts the existing technology.

[0037] The present utility model provides an idea and method for a system to achieve catheter and OCT data synchronization. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present utility model. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. Each component not clearly defined in this embodiment can be implemented by using existing technologies.

Claims

1. A system for realizing the synchronization of catheter and OCT data, characterized in that, It includes an MCU control unit, a light source, a motor, and an imaging catheter; the light source is connected to the motor through the imaging catheter, and the MCU control unit, the light source, and the motor are electrically connected; the MCU control unit is also connected to the optical encoder in the motor, used to receive the optical encoder signal and control the motor speed to achieve the matching of the rotation of the imaging catheter and the light source frequency.

2. The system for realizing the synchronization of the catheter and OCT data according to claim 1, wherein The MCU control unit is an ARM series processor.

3. The system for realizing the synchronization of the catheter and OCT data according to claim 1, wherein The light source is used to provide an imaging light source and a Trig level signal, and the level signal is a TTL level.

4. The system for realizing the synchronization of the catheter and OCT data according to claim 1, characterized in that, The motor is a brushless DC motor and contains an optical encoder signal inside.

5. The system for realizing the synchronization of the catheter and OCT data according to claim 1, wherein The optical encoder provides a TTL level signal output.

6. The system for realizing the synchronization of the catheter and OCT data according to claim 1, characterized in that, The imaging catheter is an intravascular imaging catheter, which contains optical fibers inside, is structurally connected to the motor, and the rotation of the imaging catheter is driven by the motor.

7. The system for realizing catheter and OCT data synchronization according to claim 1, wherein In the MCU control unit, a judgment module is set to judge whether the motor speed frequency is consistent with the light source frequency.

8. The system for realizing the synchronization of the catheter and OCT data according to claim 1, wherein, The motor speed is controlled at 1500 rpm to 6000 rpm.

9. The system for realizing catheter and OCT data synchronization according to claim 1, characterized in that, The light source frequency is controlled at 50 kHz to 100 kHz.

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