阅读说明：本技术 内窥oct回撤控制系统及控制方法 (Endoscopic OCT (optical coherence tomography) withdrawing control system and control method ) 是由 赵士勇 刘治勇 于 2020-04-24 设计创作，主要内容包括：一种内窥OCT回撤控制系统,包括成像导管、连接件、回撤控制模块；所述回撤控制模块通过连接件与所述成像导管连接；所述回撤控制模块包括回撤模块和主控模块；所述主控单元将控制指令输出至驱动单元,所述驱动单元接收主控单元控制模式指令并输出相应的驱动信号至驱动电机,驱动电机控制所述成像导管的成像探头旋转并以设定速度前后移动至指定距离；所述监测单元实时监测成像导管及回撤控制模块的信息并反馈给主控单元实现闭环控制。相对于单一模式的回撤系统,本发明针对应用需求,提出了多模式的回撤系统及其控制方法,图像信息更为丰富,同时为用户提供了多种选择,灵活,应用范围广,减少了手术风险。(An endoscopic OCT (optical coherence tomography) withdrawal control system comprises an imaging catheter, a connecting piece and a withdrawal control module; the retraction control module is connected with the imaging catheter through a connecting piece; the withdrawing control module comprises a withdrawing module and a main control module; the main control unit outputs a control instruction to the driving unit, the driving unit receives a main control unit control mode instruction and outputs a corresponding driving signal to the driving motor, and the driving motor controls the imaging probe of the imaging catheter to rotate and move back and forth to a specified distance at a set speed; and the monitoring unit monitors the information of the imaging catheter and the retraction control module in real time and feeds the information back to the main control unit to realize closed-loop control. Compared with a single-mode retraction system, the multi-mode retraction system and the control method thereof are provided aiming at application requirements, the image information is richer, multiple choices are provided for users, flexibility is realized, the application range is wide, and the operation risk is reduced.)

1. An endoscopic OCT (optical coherence tomography) withdrawal control system comprises an imaging catheter, a connecting piece and a withdrawal control module; the retraction control module is connected with the imaging catheter through a connecting piece; the device is characterized in that the withdrawing control module comprises a withdrawing module and a main control module, and the withdrawing module is electrically connected with the main control module through a lead; the withdrawing module comprises two driving motors, a rotary driving motor and a back-and-forth movement driving motor, the main control module comprises a driving unit, a main control unit and a monitoring unit, the main control unit outputs a control instruction to the driving unit, the driving unit receives a main control unit control mode instruction and outputs a corresponding driving signal to the driving motor, and the driving motor controls the imaging probe of the imaging catheter to rotate and move back and forth to a specified distance at a set speed; and the monitoring unit monitors the information of the imaging catheter and the retraction control module in real time and feeds the information back to the main control unit to realize closed-loop control.

2. The endoscopic OCT retraction control system according to claim 1, wherein said driving motor drives the imaging core of the imaging catheter to move in a fixed-point mode, a high-definition mode, and an ultra-long mode; when the imaging core moves in a fixed-point mode, the imaging probe of the imaging core moves to a specified position, the rotation driving motor controls the imaging probe to rotate, and the forward and backward movement driving motor stops; when the imaging core moves in a high-definition mode, after an imaging probe of the imaging core reaches 5-15 mm of a lesion area, the rotation driving motor controls the imaging probe to rotate, and meanwhile, the forward and backward movement driving motor drives the imaging core to retract 5-8cm at the speed of 6000-12000 r/min; when the imaging core moves in an overlong mode, the rotary driving motor drives the imaging probe of the imaging core to reach 5-15 mm of a lesion area, the rotary driving motor controls the imaging probe to rotate, and meanwhile, the forward and backward movement driving motor drives the imaging core to retract 8-10cm at the speed of 12000-.

3. The endoscopic OCT retraction control system of claim 1, wherein the imaging catheter is comprised of an imaging core and an outer sheath, the core and the outer sheath being filled with a liquid to remove air from the lumen and lubricate the lumen; the imaging core comprises an imaging probe, an optical fiber and a torque cable outside the optical fiber, and the imaging core is rotated and retracted to complete 360 degrees of tissue inside a designated distance^°And (6) imaging.

4. The endoscopic OCT retraction control system according to claim 1, wherein the information of the imaging catheter and the retraction control module monitored by the monitoring unit in real time comprises probe position information and information of motor speed, torque, illumination intensity, motor temperature, etc.

5. The endoscopic OCT retraction control system according to claim 1, wherein the control mode of the drive motor and the information transmitted by the current monitoring unit are displayed by a display unit.

6. The endoscopic OCT retraction control system according to claim 5, wherein said display unit comprises a display module and a control panel comprising control buttons and/or keys and an indicator light.

7. The endoscopic OCT retraction control system according to claim 1, wherein said retraction module comprises a forward-backward motion drive motor, a support, an opto-electronic connection, a catheter connection, and a rotation drive motor; the support piece is provided with a guide rail, and the shaft sleeve is arranged on the guide rail and can axially complete linear motion along the guide rail; the photoelectric connecting piece and the rotary driving motor are respectively fixed on the upper part and the lower part of the shaft sleeve, and the rotary driving motor completes the rotary driving control on the photoelectric connecting piece through a transmission belt; the conduit connecting piece is arranged at the front end of the supporting piece; the driving motor is fixed at the rear part of the support piece and is connected with the shaft sleeve through a screw rod, so that the control of the integral linear motion of the photoelectric connector, the conduit connector and the conduit behind the conduit connector is completed.

8. A method for controlling the endoscopic OCT retraction control system according to claim 1, characterized in that it comprises the following steps:

(1) setting a driving mode of a driving motor, wherein the driving mode comprises a fixed point mode, an overlong mode or a high-definition mode;

(2) when the fixed-point mode is selected, the imaging probe of the imaging catheter moves to a designated position, retraction is started, the main control unit outputs a fixed-point mode control signal to the driving unit, the driving unit outputs a driving signal, the driving rotary driving motor drives the imaging probe to rotate at a certain rotating speed, and the forward and backward movement driving motor is in a standby state;

(3) when a high-definition mode is selected, after an imaging probe of the imaging catheter reaches a lesion area by 5-15 mm, withdrawing is started, a main control unit outputs a high-definition mode control signal to a driving unit, the driving unit outputs a driving signal, a rotary driving motor is driven to control the imaging probe to rotate at a certain rotating speed, and a forward and backward movement driving motor is driven to withdraw at a lower speed, the withdrawing speed of the high-definition mode is relatively lower, and the withdrawing distance is relatively shorter;

(4) when the overlength mode is selected, after an imaging probe of the imaging catheter reaches a lesion area by 5-15 mm, retraction is started, the main control unit outputs overlength mode control signals to the driving unit, the driving unit outputs driving signals, the driving rotary driving motor is driven to control the imaging probe to rotate at a certain rotating speed, the forward and backward movement driving motor is driven to retract at a higher speed, the overlength mode retraction speed is higher, and the retraction distance is longer.

9. The method of claim 8, wherein one of the fixed-point mode, the extra-long mode and the high-definition mode is used as a default mode, and when the set-point mode, the extra-long mode or the high-definition mode is not selected and the set-point mode starts to be retracted, the system operates in the default mode.

10. The method of claim 8, wherein the main control unit receives the monitoring information fed back from the monitoring unit, and if the monitoring information exceeds a predetermined threshold, the main control unit sends a control signal to control the driving motor to stop the probe from rotating and retracting, and enters a non-operating state to send an early warning signal.

Technical Field

The invention relates to the field of medical instruments, in particular to an endoscopic OCT (optical coherence tomography) withdrawal control system and a control method.

Background

The medical endoscopic probe is a non-invasive or minimally invasive medical instrument commonly used in the prior medicine, and can directly observe the tissue lesion of internal organs of a human body. The traditional endoscopic probe can only observe the surface of an internal organ, and the introduction of the ultrasonic technology enables the endoscopic probe to observe the tissue form of organ faults, but the resolution ratio is low, so that the resolution ratio level required by accurate diagnosis is difficult to achieve. The combination of Optical Coherence Tomography (OCT) and endoscopic probe makes it possible to observe internal organ with high resolution and high sensitivity. Clinical trials have shown that the high resolution provided by OCT can be used for monitoring a variety of diseases, such as: ophthalmology, dermatology, cardiovascular department, oral cavity, respiratory department, digestive department, etc. Has incomparable advantages in early cancer monitoring of organs in human bodies, tumor resection, stent installation and evaluation.

The endoscopic OCT withdrawing system is mainly used for controlling the linear motion of the catheter so as to finish tissue imaging with a certain length and acquire related information of a lesion area. A typical endoscopic OCT retraction system includes a drive motor, a drive shaft, a connector, and an imaging catheter including an imaging core and an outer sheath. The withdrawing process comprises the following steps: and when the probe reaches the lesion area and exceeds at least 5mm, starting automatic retraction, and retracting the imaging catheter for a specified distance to image the whole lesion area. This process is typically 3-7 seconds with a withdrawal distance of 50-150 mm. During the period, the outer protecting pipe of the catheter is kept still, the imaging core is withdrawn while rotating at a high speed under the control of the motor, the tissue is spirally point-scanned, optical signals returned by each point of the tissue are collected, after the imaging core is withdrawn to a set distance such as 50mm, the motor stops moving, and the scanning is finished.

The existing endoscopic OCT withdrawing control system has simple control mode and only considers one withdrawing mode. The withdrawal length and withdrawal speed are fixed, and the imaging information is monotonous, so that the clinical requirements cannot be met. Especially when a plurality of lesions exist in the lumen, the traditional single mode may need two or more times of withdrawal, the use amount of the contrast medium is increased, the injury to the renal function of a patient is large, and the operation risk is high.

At the same time, the pullback system load appears as a dynamic load due to the complexity of the imaging tissue composition and structure. The traditional withdrawal system does not consider the phenomenon that the load is a dynamic load, the motor driving control is simple, the open-loop control is mostly adopted, and the system robustness is poor. When the system load changes, if the control signal does not compensate correspondingly, the rotating speed of the imaging catheter changes, thereby causing imaging distortion, influencing imaging quality and causing wrong lesion assessment in severe cases. Meanwhile, the imaging catheter has a certain length and the imaging target lumen has uneven tortuosity, so that the imaging catheter is shaken to further cause image distortion due to unstable motor drive or poor coaxiality of a system mechanical structure, and the analysis and evaluation of the tissue state such as the stenosis degree are influenced.

Disclosure of Invention

The invention aims to provide an endoscopic OCT (optical coherence tomography) withdrawing control system and a control method, which can solve the defects of the prior art and adopt a multi-mode closed-loop withdrawing control system, wherein the multi-mode comprises a fixed-point mode, a high-definition mode and an ultra-long mode or a combination of two modes; and according to the dynamic load characteristic, closed-loop control is adopted, so that the anti-interference capability of the system is improved; meanwhile, a high-coaxiality driving motor is adopted, a high-strength alloy sleeve and a precisely machined connecting shaft are adopted for mechanical connection, all parts are tightly connected, the coaxiality is high, and the mechanical stability of the system is guaranteed.

The technical scheme of the invention is as follows: an endoscopic OCT (optical coherence tomography) withdrawal control system comprises an imaging catheter, a connecting piece and a withdrawal control module; the retraction control module is connected with the imaging catheter through a connecting piece; the device is characterized in that the withdrawing control module comprises a withdrawing module and a main control module, and the withdrawing module is electrically connected with the main control module through a lead; the withdrawing module comprises two driving motors, a rotary driving motor and a back-and-forth movement driving motor, the main control module comprises a driving unit, a main control unit and a monitoring unit, the main control unit outputs a control instruction to the driving unit, the driving unit receives a main control unit control mode instruction and outputs a corresponding driving signal to the driving motor, and the driving motor controls the imaging probe of the imaging catheter to rotate and move back and forth to a specified distance at a set speed; and the monitoring unit monitors the information of the imaging catheter and the retraction control module in real time and feeds the information back to the main control unit to realize closed-loop control.

The driving motor drives an imaging core of the imaging catheter to move in a fixed-point mode, a high-definition mode and an overlong mode; when the imaging core moves in a fixed-point mode, the imaging probe of the imaging core moves to a specified position, the rotation driving motor controls the imaging probe to rotate, and the forward and backward movement driving motor stops; when the imaging core moves in a high-definition mode, after an imaging probe of the imaging core reaches 5-15 mm of a lesion area, the rotation driving motor controls the imaging probe to rotate, and meanwhile, the forward and backward movement driving motor drives the imaging core to retract 5-8cm at the speed of 6000-12000 r/min; when the imaging core moves in an overlong mode, the rotary driving motor drives the imaging probe of the imaging core to reach 5-15 mm of a lesion area, the rotary driving motor controls the imaging probe to rotate, and meanwhile, the forward and backward movement driving motor drives the imaging core to retract 8-10cm at the speed of 12000-.

The imaging catheter consists of an imaging core and an outer protective tube, and liquid is filled between the imaging core and the outer protective tube to remove air in a lumen and play a role in lubrication; the imaging core comprises an imaging probe, an optical fiber and a torque cable outside the optical fiber, and the imaging core is rotated and retracted to complete 360 degrees of tissue inside a designated distance^°And (6) imaging.

The information of the imaging catheter and the withdrawal control module monitored by the monitoring unit in real time comprises probe position information and information such as motor rotating speed, torque, illumination intensity, motor temperature and the like.

And the control mode of the driving motor and the information transmitted by the current monitoring unit are displayed by the display unit.

The display unit comprises a display module and a control panel, wherein the control panel comprises control buttons/keys and an indicator light.

The withdrawing module comprises a back-and-forth movement driving motor, a supporting piece, a photoelectric connecting piece, a conduit connecting piece and a rotation driving motor; the support piece is provided with a guide rail, and the shaft sleeve is arranged on the guide rail and can axially complete linear motion along the guide rail; the photoelectric connecting piece and the rotary driving motor are respectively fixed on the upper part and the lower part of the shaft sleeve, and the rotary driving motor completes the rotary driving control on the photoelectric connecting piece through a transmission belt; the conduit connecting piece is arranged at the front end of the supporting piece; the driving motor is fixed at the rear part of the support piece and is connected with the shaft sleeve through a screw rod, so that the control of the integral linear motion of the photoelectric connector, the conduit connector and the conduit behind the conduit connector is completed.

The control method of the endoscopic OCT withdrawing control system is characterized by comprising the following steps of:

(1) setting a driving mode of a driving motor, wherein the driving mode comprises a fixed point mode, an overlong mode or a high-definition mode;

(2) when the fixed-point mode is selected, the imaging probe of the imaging catheter moves to a designated position, retraction is started, the main control unit outputs a fixed-point mode control signal to the driving unit, the driving unit outputs a driving signal, the driving rotary driving motor drives the imaging probe to rotate at a certain rotating speed, and the forward and backward movement driving motor is in a standby state;

(3) when a high-definition mode is selected, after an imaging probe of the imaging catheter reaches a lesion area by 5-15 mm, withdrawing is started, a main control unit outputs a high-definition mode control signal to a driving unit, the driving unit outputs a driving signal, a rotary driving motor is driven to control the imaging probe to rotate at a certain rotating speed, and a forward and backward movement driving motor is driven to withdraw at a lower speed, the withdrawing speed of the high-definition mode is relatively lower, and the withdrawing distance is relatively shorter;

(4) when the overlength mode is selected, after an imaging probe of the imaging catheter reaches a lesion area by 5-15 mm, retraction is started, the main control unit outputs overlength mode control signals to the driving unit, the driving unit outputs driving signals, the driving rotary driving motor is driven to control the imaging probe to rotate at a certain rotating speed, the forward and backward movement driving motor is driven to retract at a higher speed, the overlength mode retraction speed is higher, and the retraction distance is longer.

And one of the fixed point mode, the ultra-long mode or the high-definition mode is used as a default mode, and when the withdrawing is started without selecting any withdrawing mode, the system operates in the default mode.

The main control unit receives monitoring information fed back by the monitoring unit, and if the monitoring information exceeds a set threshold, the main control unit sends a control signal to control the driving motor to stop the probe from rotating and withdrawing, and then the probe enters a non-working state.

And when the monitoring information exceeds a set threshold value, the display unit sends out an early warning signal.

The early warning signal is a character signal or a sound signal, for example, the font color is red, the information flickers, or a buzzing sound is emitted.

The invention has the advantages that: 1. compared with a single-mode retraction system, the multi-mode retraction system and the control method thereof are provided aiming at application requirements, the image information is richer, multiple choices are provided for users, flexibility is realized, the application range is wide, and the operation risk is reduced; 2. the invention gives priority to the characteristic that the load of the endoscopic OCT withdrawing system is dynamic load, and provides a control method based on closed-loop control according to the characteristic, thereby improving the anti-interference capability of the system and ensuring the stability and reliability of the system; 3. in terms of mechanical structure, the motor, the transmission shaft and the connecting piece have high coaxiality, the use amount of contrast agents is reduced, and meanwhile, the stability of the system is guaranteed.

Drawings

Fig. 1 is a schematic diagram of an endoscopic OCT retraction control system according to the present invention.

Fig. 2 is a block diagram of a closed-loop control of an endoscopic OCT retraction control system according to the present invention.

Fig. 3 is a control flow chart of an endoscopic OCT retraction control system according to the present invention.

Fig. 4 is a sectional view of a retraction module in an endoscopic OCT retraction control system according to the present invention.

Fig. 5 is a schematic diagram of a control panel of an endoscopic OCT retraction control system according to the present invention.

Detailed Description

As shown in fig. 1, an endoscopic OCT retraction control system includes an imaging catheter 1, a connector 4, and a retraction control module; the retraction control module is tightly connected with the imaging catheter 1 through a connecting piece 4; the intelligent control system is characterized in that the withdrawing control module comprises a withdrawing module 2 and a main control module 3, and the withdrawing module 2 is electrically connected with the main control module 3 through a lead 5; the withdrawing module 2 comprises two driving motors, a rotary driving motor and a back-and-forth movement driving motor, the main control module 3 comprises a driving unit, a main control unit and a monitoring unit, the main control unit outputs a control instruction to the driving unit, the driving unit receives a main control unit control mode instruction and outputs a corresponding driving signal to the driving motor, and the driving motor controls the imaging probe 6 of the imaging catheter 1 to rotate and move back and forth to a specified distance at a set speed through a driving shaft and a connecting piece; and the monitoring unit monitors the information of the imaging catheter and the retraction control module in real time and feeds the information back to the main control unit to realize closed-loop control.

The closed loop system shown in fig. 2 includes a main control unit, a driving motor, an imaging catheter, a monitoring unit, and a display unit. When a user presses a mode button, such as a fixed-point mode, a high-definition mode or an ultra-long mode, the main control unit outputs a corresponding control instruction to the driving unit and the display unit according to the state of the button, the display unit displays the current system mode, the driving unit outputs a corresponding control signal, and the motor linearly moves at a certain speed to set a distance, wherein the fixed-point mode withdrawal distance is 0, namely in-situ rotation imaging, the high-definition mode withdrawal distance is relatively short, such as 50mm, 60mm or the like, and the high-definition mode withdrawal speed is relatively slow, such as 9mm/s, 10mm/s or the like, while the ultra-long mode withdrawal speed is relatively fast, such as 18mm/s, 20mm/s or the like, and the withdrawal distance is relatively long, such as 80mm, 90mm or the like, and is mainly used for the condition that a plurality of lesions exist in a lumen. When the system runs, the monitoring unit monitors corresponding information of the driving motor and the imaging catheter in real time and feeds the information back to the main control unit to form closed-loop control. The monitoring information is probe position information, and the accurate control of the position of the probe is realized. Or, the monitoring information is position information and rotating speed information, when the rotating speed exceeds a set threshold value, the main control unit sends a stop command to the driving unit and controls the motor to stop moving, meanwhile, the main control unit outputs early warning control information to the display unit, the rotating speed information displayed by the display unit flickers, or the color of the rotating speed information becomes red, and sound early warning information can be added. Or the monitoring information can be the combination of one or more of position information, temperature, torque, illumination intensity and the like, closed-loop control is realized, the control precision and reliability of the system are improved, and the operation risk is reduced.

As shown in fig. 3, a control method of the endoscopic OCT retraction control system includes: the imaging catheter is successfully connected, after the imaging catheter enters a tissue to be detected and reaches a designated position, a user selects a retraction mode, the main control unit outputs a corresponding control command to the driving unit and the display unit according to the state of the button, the display unit displays the current mode, after the user presses a retraction starting button, the driving unit receives the control command of the main control unit and outputs a driving signal to the driving motor, and the motor moves to drive the imaging catheter to perform imaging. When the user does not select the mode to press the withdrawing start, the system enters a default mode, which may be any one of the system modes and can be set by the user as required, and the default mode of the system is a high-definition mode in this embodiment. When the motor moves, the monitoring unit monitors the position, the rotating speed, the torque, the temperature, the illumination intensity and other information of the motor and the imaging catheter in real time and feeds the information back to the main control unit, so that the position is accurately controlled. And the main control unit outputs a corresponding instruction to the display unit according to the monitoring information so as to display the current system state. Meanwhile, judging whether other information of the main control unit, such as the rotating speed, exceeds a threshold value, namely, the main control unit is in a non-working range, and if the other information of the main control unit does not exceed the threshold value, the system normally operates; otherwise, when the threshold value is exceeded, the main control unit sends a stop command to the driving unit to control the motor to stop moving so as to ensure the safety and reliability of the operation; meanwhile, early warning information is sent to the display unit, and corresponding monitoring information is displayed in an abnormal working state, so that a user can conveniently judge the abnormal reason and remedy the abnormal reason in time.

When the fixed-point mode is selected, the imaging probe of the imaging catheter moves to a specified position, the position is limited as before, the retraction is started, the main control unit outputs a fixed-point mode control signal to the driving unit, the driving unit outputs a driving signal, such as a PWM (pulse width modulation) signal with a certain frequency, the duty ratio is adjustable PWM, the driving rotary driving motor drives the imaging probe to rotate at a certain rotating speed, and the front-back movement driving motor is in a standby state;

when a high-definition mode is selected, after an imaging probe of the imaging catheter reaches at least a distance of a lesion area, such as 5mm, 10mm, 15mm and the like, retraction is started, the main control unit outputs a high-definition mode control signal to the driving unit, the driving unit outputs a driving signal, such as a PWM (pulse width modulation) signal with a certain frequency, PWM with an adjustable duty ratio, drives the rotary driving motor to control the imaging probe to rotate at the speed of 6000-plus 12000r/min, and simultaneously drives the forward and backward movement driving motor to retract at a lower speed, such as 9mm/s, 10mm/s or the like, the retraction speed of the high-definition mode is relatively lower, and the retraction distance is relatively shorter, such as 50mm, 60mm or the like;

when the overlength mode is selected, after the imaging probe of the imaging catheter reaches at least a distance, such as 5mm, 10mm, 15mm and the like, retraction is started, the main control unit outputs overlength mode control signals to the driving unit, the driving unit outputs driving signals, such as PWM (pulse width modulation) signals with certain frequency, PWM with adjustable duty ratio, drives the rotary driving motor to control the imaging probe to rotate at the speed of 12000 and 20000r/min, and simultaneously drives the forward and backward movement driving motor to retract at a higher speed, such as 18mm/s, 20mm/s or the like, the overlength mode retraction speed is higher, and the retraction distance is longer, such as 50mm, 60mm or the like.

As shown in fig. 4, the retraction module 2 includes a forward and backward movement driving motor 41, a support member 42, a photoelectric connector 43, a conduit connector 44, and a rotation driving motor 45; the support member 42 is provided with a guide rail, and the shaft sleeve is arranged on the guide rail and can complete linear motion along the axial direction of the guide rail; the photoelectric connecting piece 43 and the rotary driving motor 45 are respectively fixed on the upper part and the lower part of the shaft sleeve, and the rotary driving motor 45 completes the rotary driving control on the photoelectric connecting piece 43 through a transmission belt; a conduit coupler 44 is mounted to the front end of the support member 42; the driving motor 41 is fixed at the rear part of the supporting member 42 and is connected with the shaft sleeve through a screw rod, so that the whole linear motion control of the photoelectric connector 43, the conduit connector 44 and the conduit behind the photoelectric connector is completed.

The photoelectric connecting piece 43 is fixed through a threaded sleeve, and the coaxiality of the photoelectric connecting piece 43 and the catheter connecting piece 44 is guaranteed. Or the photoelectric connecting piece 43 is guided by two or more precisely machined connecting shafts, so that the coaxiality of the photoelectric connecting piece 43 and other connecting devices is ensured. The rotating module 45 may be a rotating control motor, such as a brushless motor, a dc motor, etc.

As shown in fig. 5, the control panel of the retraction control system includes a housing 51, a mode indicator 52, a display module 53, a button 54, a power-on indicator 55, and a retraction indicator 56. The display module 53 is mainly used for displaying system information, such as a retraction mode, a rotation speed, a temperature, an illumination intensity, a position and the like, the button 54 mainly comprises a high-definition mode button, an ultra-long mode button, a fixed-point mode button and a retraction button, the mode indication 52 lamp displays different states according to the current mode of the system, such as colors, a flashing frequency and the like, the retraction indication lamp 56 is used for indicating the retraction state of the system, the retraction indication lamp 56 is turned on if the system is in the retraction state, and the retraction indication lamp 56 is turned off in other states.

The imaging catheter consists of an imaging core and an outer protective tube, and liquid is filled between the imaging core and the outer protective tube to remove air in a lumen and play a role in lubrication; the imaging core comprises an imaging probe, an optical fiber and a torque cable outside the optical fiber, and the imaging core is rotated and retracted to complete 360 degrees of tissue inside a designated distance^。And (6) imaging.

When the monitoring information exceeds a set threshold value, a display unit sends out an early warning signal; the early warning signal is a character signal or a sound signal, for example, the font color is red, the information flickers, or a buzzing sound is emitted.