Intravascular opto-acoustic-ultrasonic dual-mode imaging device and imaging method

Abstract

The invention discloses an intravascular opto-acoustic-ultrasonic dual-mode imaging device and an imaging method, and relates to the technical field of medical equipment. The intravascular photoacoustic ultrasonic dual-mode imaging device comprises a sickbed, an imaging device and an injector, and further comprises a limiting mechanism arranged on a main machine and used for limiting an imaging catheter, the limiting mechanism comprises two first fixing plates which are fixedly connected to the side, close to the imaging catheter, of the main machine and are symmetrically arranged in pairs, and the first fixing plates are fixedly connected to the side, close to the imaging catheter, of the main machine. A rotating plate is connected between every two adjacent first fixing plates through a rotating shaft, and the ends, away from the main machine, of the two rotating plates are fixedly connected with a semicircular limiting plate. According to the intravascular photoacoustic ultrasonic dual-mode imaging device and the imaging method, through the arrangement of the limiting mechanism, the imaging catheter is limited and fixed in the contrast agent injection process, so that the risk that the imaging catheter falls off due to the fact that the contrast agent injection speed is too high or the blood vessel is blocked is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an intravascular photoacoustic and ultrasonic dual-mode imaging device and an imaging method. Background Art

[0002] The intravascular photoacoustic and ultrasound dual-mode imaging device is a medical device that combines photoacoustic imaging technology and ultrasound imaging technology. It is mainly used for intravascular image acquisition and diagnosis. Its main principle is imaging through the photoacoustic effect, that is, after the tissue absorbs light energy, it forms a rapid thermoelastic expansion to generate an ultrasound signal, thereby achieving imaging. This technology combines the advantages of optical and ultrasonic imaging, has high sensitivity and high contrast, and can achieve the desired penetration depth and resolution, while avoiding the risk of ionizing radiation.

[0003] When performing an intravascular photoacoustic ultrasound dual-mode imaging examination on a patient, firstly, local anesthesia is performed on the patient's vascular area to be examined, then puncture is performed through the femoral artery or other suitable puncture points, and a guide catheter is inserted to the corresponding coronary artery or other target blood vessel opening, and the intravascular photoacoustic ultrasound dual-mode imaging catheter is sent along the guide catheter to the target blood vessel, and finally the photoacoustic imaging mode is started, and the photoacoustic effect in the blood vessel is stimulated by laser to obtain a photoacoustic image, and the ultrasound imaging mode is started simultaneously or separately, and the ultrasound image is obtained by scanning the inside of the blood vessel with ultrasound.

[0004] When performing intravascular imaging, the imaging catheter needs to be used in conjunction with a contrast agent. A syringe is used to inject sufficient contrast agent into the catheter lumen through a specific interface (such as a 6% Luer connector) connected to the imaging catheter, so that the contrast agent flows out from the contrast agent port at the catheter head end and enters the blood vessel, thereby utilizing the contrast agent to enhance visibility of the internal structure of the blood vessel and make the imaging clearer. In the prior art, the imaging catheter is directly inserted into the connecting end of the host. Although this provides convenience for the installation and removal of the imaging catheter, the injection of the contrast agent is mainly performed manually by a doctor using a syringe. During the actual injection process, it is difficult for the doctor to control the injection speed of the contrast agent, and the imaging catheter may easily fall off due to excessive injection speed or blockage in the blood vessel, thereby causing the electrical connection between the imaging catheter and the host to be interrupted, further causing the interruption of intravascular imaging, thereby affecting the continuity of vascular imaging. Summary of the invention

[0005] The purpose of the present invention is to provide an intravascular photoacoustic and ultrasonic dual-mode imaging device and imaging method to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an intravascular photoacoustic and ultrasonic dual-mode imaging device and imaging method, comprising a hospital bed, an imaging device and a syringe, wherein the imaging device is composed of a body and a display arranged on the body, the display is connected to a host through a wire, the plug end of the host is connected to an imaging catheter through a plug board, the hospital bed is provided with a support frame for supporting the host, the syringe is composed of an injection tube and a T-shaped push rod slidably connected to the injection tube, one end of the T-shaped push rod located inside the injection tube is fixedly connected to an injection plate, and also includes a limiting mechanism arranged on the host for limiting the imaging catheter; The limiting mechanism includes two groups of first fixed plates fixedly connected to the main machine on one side close to the imaging catheter and symmetrically arranged in pairs, a rotating plate is connected between two adjacent first fixed plates via a rotating shaft, and a semicircular limiting plate is fixedly connected to one end of the two rotating plates away from the main machine, and the support frame is provided with a first driving component for driving the two semicircular limiting plates.

[0007] Preferably, the first driving assembly includes a second fixed plate fixedly connected to one side of the support frame, the second fixed plate is connected to a sliding plate on a side close to the main machine through the second driving assembly, the sliding plate is fixedly connected to a first L-shaped plate on a side away from the second fixed plate, the first L-shaped plate is fixedly connected to a second L-shaped plate on a side close to the imaging catheter, the first L-shaped plate and the second L-shaped plate are provided with inclined surfaces at one end close to the semicircular limiting plate, the two groups of the first fixed plates are connected to racks on one side close to the first L-shaped plates through a telescopic assembly, one end of the two racks are respectively abutted against the two inclined surfaces, one end of the two rotating shafts is fixedly connected to a gear, and the two gears and the racks are meshed with each other.

[0008] Preferably, the telescopic assembly includes two third fixed plates fixedly connected to the first fixed plate on one side close to the rack, a telescopic rod is fixedly connected between the two third fixed plates, the two telescopic rods are slidably connected to the telescopic plates, the opposite sides of the two telescopic plates are connected to the rack, the side walls of the two telescopic rods are sleeved with first springs, and the two ends of the first springs are respectively connected to the third fixed plate and the telescopic plate.

[0009] Preferably, the second driving assembly includes a driving plate fixedly connected to the second fixed plate on the side close to the sliding plate, and two driving tubes symmetrically arranged are provided on the side of the driving plate close to the sliding plate, one end of the two driving tubes is connected to the sliding plate, one of the two driving tubes is slidably connected to a driving rod, one end of the driving rod is connected to the driving plate, and the other of the two driving tubes is threadedly connected to a threaded rod, and a motor is fixedly connected to the side of the driving plate away from the sliding plate, and the output end of the motor is connected to the threaded rod.

[0010] Preferably, the sliding plate is provided with a detection component for detecting the injection resistance of the contrast agent, the detection component includes a U-shaped plate slidably connected to the side of the sliding plate away from the driving plate, the pushing end of the T-shaped push rod is located in the U-shaped plate, the sliding plate is fixedly connected to a detection tube on the side close to the U-shaped plate, the detection tube is slidably connected to a detection rod, the end of the detection rod away from the sliding plate is fixedly connected to a pushing block, one side of the pushing block is fixedly connected to the detection plate, the sliding plate is provided with a distance sensor, the detection end of the distance sensor is arranged opposite to the detection plate, the side wall of the detection tube is sleeved with a second spring, the two ends of the second spring are respectively connected to the sliding plate and the pushing block, and the sliding plate is provided with a connecting component for connecting to the U-shaped plate.

[0011] Preferably, the connecting assembly includes two connecting tubes that are fixedly connected to the sliding plate and are symmetrically arranged on one side of the U-shaped plate. The two connecting tubes are slidably connected with a connecting rod, one end of the two connecting rods is connected to the U-shaped plate, and the side walls of the two connecting tubes are provided with connecting grooves, the two connecting grooves are slidably connected with connecting pins, and one end of the two connecting pins is connected to the connecting rod.

[0012] Preferably, the second fixing plate is provided with a fixing assembly for fixing the syringe, and the fixing assembly comprises a U-shaped frame fixedly connected to a side of the second fixing plate close to the connecting tube, and the U-shaped frame is connected to a pressing plate via an extrusion assembly.

[0013] Preferably, the pressure plate is arranged in the form of an arc-shaped dovetail plate, and the arc degree is matched with the outer side wall of the injection tube.

[0014] Preferably, the extrusion assembly includes two symmetrically arranged extrusion rods fixedly connected to the U-shaped frame, the pressure plate is slidably connected to the two extrusion rods, the side walls of the two extrusion rods are sleeved with a third spring, and the two ends of the two third springs are respectively connected to the U-shaped frame and the pressure plate.

[0015] An intravascular photoacoustic and ultrasound dual-mode imaging method comprises the following steps: S1: When the intravascular photoacoustic ultrasound dual-mode imaging device is used, firstly, local anesthesia is performed on the patient's blood vessel part to be examined, and then puncture is performed through the femoral artery or other suitable puncture points, and a guide catheter is inserted to the corresponding coronary artery or other target blood vessel opening, and the intravascular photoacoustic ultrasound dual-mode imaging catheter is sent along the guide catheter to the target blood vessel, and finally the photoacoustic imaging mode is started to obtain a photoacoustic image and an ultrasound image; S2: When performing intravascular imaging, the syringe is fixed by the cooperation of the fixing component and the squeezing component, and the syringe is fixed on the second fixing plate, and then connected to the injection end of the injection tube by using a specific interface (such as a 6% Luer connector) on the imaging catheter; S3: After the syringe is fixed, the two semicircular limiting plates are rotated to be pressed against the side wall of the imaging catheter by the cooperation of the second driving assembly and the first driving assembly, thereby achieving the limiting fixation of the imaging catheter; S4: After the syringe is fixed, the contrast agent in the injection tube is injected into the imaging catheter under the continuous driving action of the second driving component; S5: During the injection of contrast agent, if blockage occurs in the blood vessel, the detection component will promptly warn the medical staff and remind the volunteers to intervene.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This intravascular photoacoustic ultrasound dual-mode imaging device and imaging method, through the setting of a limiting mechanism, under the cooperation of the first drive component and the second drive component, realizes the limiting fixation of the imaging catheter during the contrast agent injection process, thereby reducing the risk of the imaging catheter falling off due to excessive contrast agent injection speed or blockage in the blood vessel, thereby maintaining the continuity of the electrical connection between the imaging catheter and the host, further ensuring the integrity and continuity of the intravascular imaging, and at the same time, under the detection of the detection mechanism, timely warning of the blockage in the blood vessel is given, and the voluntary personnel are reminded to intervene, thereby avoiding the safety of the intravascular photoacoustic ultrasound dual-mode imaging examination being affected by excessive contrast agent pushing resistance caused by blood vessel blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the limiting mechanism in the present invention; Figure 3 It is a schematic diagram of the structure of the driving component in the present invention; Figure 4 It is a schematic diagram of the structure of the extrusion assembly in the present invention; Figure 5 It is a schematic diagram of the structure inside the syringe of the present invention; Figure 6 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 7 for Figure 3 A schematic diagram of the enlarged structure at B in the middle; Figure 8 for Figure 4 Schematic diagram of the enlarged structure at C in the middle; Fig. 9 for Figure 7 Schematic diagram of the enlarged structure at D in the middle.

[0018] In the figure: 101, hospital bed; 102, machine body; 103, display; 104, wire; 105, host; 106, imaging catheter; 107, plug board; 108, support frame; 109, injection tube; 110, T-type push rod; 111, injection plate; 2, limit mechanism; 201, first fixed plate; 202, rotating shaft; 203, rotating plate; 204, semicircular limit plate; 3, first driving assembly; 301, second fixed plate; 302, sliding plate; 303, first L-shaped plate; 304, second L-shaped plate; 305, inclined plane; 306, rack; 307, gear; 4, telescopic assembly; 401, third fixed plate; 402 , telescopic rod; 403, telescopic plate; 404, first spring; 5, second driving assembly; 501, driving plate; 502, driving tube; 503, driving rod; 504, threaded rod; 505, motor; 6, detection assembly; 601, U-shaped plate; 602, detection tube; 603, detection rod; 604, pushing block; 605, detection plate; 606, distance sensor; 607, second spring; 7, connecting assembly; 701, connecting tube; 702, connecting rod; 703, connecting groove; 704, connecting pin; 8, fixing assembly; 801, U-shaped frame; 802, pressure plate; 9, extrusion assembly; 901, extrusion rod; 902, third spring. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 9 The present invention provides a technical solution: an intravascular photoacoustic ultrasound dual-mode imaging device, comprising a bed 101, an imaging device and a syringe, the imaging device is composed of a body 102 and a display 103 arranged on the body 102, the display 103 is connected to a host 105 through a wire 104, the plug end of the host 105 is connected to an imaging catheter 106 through a plug board 107, the bed 101 is provided with a support frame 108 for supporting the host 105, the syringe is composed of an injection tube 109 and a T-shaped push rod 110 slidably connected to the injection tube 109, one end of the T-shaped push rod 110 located inside the injection tube 109 is fixedly connected to an injection plate 111, and also includes a limiting mechanism 2 arranged on the host 105 for limiting the imaging catheter 106; The limiting mechanism 2 includes two groups of first fixing plates 201 that are fixedly connected to the main machine 105 near the imaging catheter 106 and are symmetrically arranged in pairs, a rotating plate 203 is connected between two adjacent first fixing plates 201 via a rotating shaft 202, and a semicircular limiting plate 204 is fixedly connected to one end of the two rotating plates 203 away from the main machine 105, and the support frame 108 is provided with a first driving component 3 for driving the two semicircular limiting plates 204; It should be noted at this point that: through the setting of the limiting mechanism 2, under the cooperation of the first drive component 3 and the second drive component 5, the imaging catheter 106 is limited and fixed during the contrast agent injection process, thereby reducing the risk of the imaging catheter 106 falling off due to excessive contrast agent injection speed or blockage in the blood vessel, thereby maintaining the continuity of the electrical connection between the imaging catheter 106 and the host 105, and further ensuring the integrity and continuity of intravascular imaging.

[0021] It is worth noting that as an existing technology, the specific structure and working principle of the intravascular photoacoustic and ultrasonic dual-mode imaging device have been mastered by people in this field and will not be elaborated here.

[0022] See also Figure 3 , Figure 7 and Fig. 9 The first driving assembly 3 shown in the figure includes a second fixed plate 301 fixedly connected to one side of the support frame 108, a side of the second fixed plate 301 close to the main machine 105 is connected to a sliding plate 302 through a second driving assembly 5, a side of the sliding plate 302 away from the second fixed plate 301 is fixedly connected to a first L-shaped plate 303, a side of the first L-shaped plate 303 close to the imaging catheter 106 is fixedly connected to a second L-shaped plate 304, an end of the first L-shaped plate 303 and the second L-shaped plate 304 close to the semicircular limiting plate 204 is provided with an inclined surface 305, two groups of first fixed plates 201 close to the first L-shaped plate 303 are connected to a rack 306 through a telescopic assembly 4, one end of the two racks 306 is respectively set against the two inclined surfaces 305, one end of the two rotating shafts 202 is fixedly connected to a gear 307, and the two gears 307 and the rack 306 are meshed with each other; It should be noted that: by providing the first driving assembly 3 , the two semicircular limiting plates 204 can be driven to rotate toward each other, thereby achieving the limiting and fixing of the imaging catheter 106 .

[0023] See also Fig. 9The telescopic assembly 4 shown in the figure includes two third fixed plates 401 fixedly connected to the first fixed plate 201 near the rack 306 and arranged symmetrically with each other, a telescopic rod 402 is fixedly connected between the two third fixed plates 401, and the two telescopic rods 402 are slidably connected to the telescopic plates 403, and the opposite sides of the two telescopic plates 403 are connected to the rack 306, and the side walls of the two telescopic rods 402 are sleeved with first springs 404, and the two ends of the two first springs 404 are respectively connected to the third fixed plate 401 and the telescopic plate 403; It should be noted that the telescopic assembly 4 is configured to drive the rack 306 to reset when the rack 306 is not pushed by the squeeze, thereby further driving the semicircular limiting plate 204 to rotate away from the imaging catheter 106, thereby facilitating the release of the limiting of the imaging catheter 106.

[0024] See also Figure 3 The second driving assembly 5 shown in the figure includes a driving plate 501 fixedly connected to the side of the second fixed plate 301 close to the sliding plate 302, and two driving tubes 502 are symmetrically arranged on the side of the driving plate 501 close to the sliding plate 302, one end of the two driving tubes 502 is connected to the sliding plate 302, one of the two driving tubes 502 is slidably connected to a driving rod 503, one end of the driving rod 503 is connected to the driving plate 501, and the other of the two driving tubes 502 is threadedly connected to a threaded rod 504, and a motor 505 is fixedly connected to the side of the driving plate 501 away from the sliding plate 302, and the output end of the motor 505 is connected to the threaded rod 504; It should be noted that the second driving assembly 5 is configured to move the injection plate 111 in the injection tube 109 at a uniform speed, thereby avoiding an overly fast injection speed of the contrast agent.

[0025] See also Figure 8 The sliding plate 302 shown in the figure is provided with a detection component 6 for detecting the injection resistance of the contrast agent, the detection component 6 includes a U-shaped plate 601 slidably connected to the side of the sliding plate 302 away from the driving plate 501, the pushing end of the T-shaped push rod 110 is located in the U-shaped plate 601, the side of the sliding plate 302 close to the U-shaped plate 601 is fixedly connected with a detection tube 602, the detection tube 602 is slidably connected with a detection rod 603, the end of the detection rod 603 away from the sliding plate 302 is fixedly connected with a push block 604, and one side of the push block 604 is fixedly connected with a detection plate 605, the sliding plate 302 is provided with a distance sensor 606, the detection end of the distance sensor 606 is arranged opposite to the detection plate 605, the side wall of the detection tube 602 is sleeved with a second spring 607, the two ends of the second spring 607 are respectively connected to the sliding plate 302 and the pushing block 604, and the sliding plate 302 is provided with a connecting component 7 for connecting with the U-shaped plate 601; It should be noted at this point that the detection component 6 is set up to provide timely warning of blockage in the blood vessel and remind the obligor to intervene, so as to avoid the safety of intravascular photoacoustic ultrasound dual-mode imaging examination being affected by excessive resistance to contrast agent introduction caused by blood vessel blockage.

[0026] See also Figure 8 The connecting assembly 7 shown in the figure includes two connecting tubes 701 fixedly connected to the sliding plate 302 near the side of the U-shaped plate 601 and arranged symmetrically with each other, the two connecting tubes 701 are slidably connected with connecting rods 702, one end of the two connecting rods 702 is connected to the U-shaped plate 601, and the side walls of the two connecting tubes 701 are provided with connecting grooves 703, the two connecting grooves 703 are slidably connected with connecting pins 704, and one end of the two connecting pins 704 is connected to the connecting rod 702; It should be noted at this point that: through the setting of the connecting component 7, after the contrast agent injection is completed, when the syringe is removed from the second fixed plate 301, under the action of the second driving component 5, the U-shaped plate 601 is driven to move closer to the driving plate 501, thereby facilitating the next contrast agent injection operation.

[0027] See also Figure 4 The second fixing plate 301 shown in the figure is provided with a fixing assembly 8 for fixing the syringe, and the fixing assembly 8 includes a U-shaped frame 801 fixedly connected to the second fixing plate 301 near the connecting tube 701, and the U-shaped frame 801 is connected to a pressing plate 802 through an extrusion assembly 9; It should be noted that the setting of the fixing assembly 8 facilitates the fixing and limiting of the syringe, thereby ensuring the stability during the injection of the contrast agent.

[0028] See also Fig. 9 The pressing plate 802 shown in the figure is arranged in an arc-shaped dovetail plate, and the arc degree is matched with the outer wall of the injection tube 109; It should be noted at this point that: by setting the pressure plate 802 as an arc-shaped dovetail plate, the pressure plate 802 is matched with the outer wall of the injection tube 109, thereby improving the firmness and stability of the fixation of the injection tube 109.

[0029] Preferably, the extrusion assembly 9 includes two extrusion rods 901 fixedly connected to the U-shaped frame 801 and symmetrically arranged, the pressing plate 802 is slidably connected to the two extrusion rods 901, and the side walls of the two extrusion rods 901 are sleeved with third springs 902, and the two ends of the two third springs 902 are respectively connected to the U-shaped frame 801 and the pressing plate 802; It should be noted that the squeezing assembly 9 is provided to provide squeezing force to the pressing plate 802, thereby ensuring that the pressing plate 802 firmly fixes the syringe.

[0030] An intravascular photoacoustic and ultrasound dual-mode imaging method comprises the following steps: S1: When the intravascular photoacoustic ultrasound dual-mode imaging device is used, firstly, local anesthesia is performed on the patient's blood vessel part to be examined, and then puncture is performed through the femoral artery or other suitable puncture points, and a guide catheter is inserted to the corresponding coronary artery or other target blood vessel opening, and the intravascular photoacoustic ultrasound dual-mode imaging catheter 106 is sent along the guide catheter to the target blood vessel, and finally the photoacoustic imaging mode is started to obtain a photoacoustic image and an ultrasound image; S2: When performing intravascular imaging, the syringe is fixed by the cooperation of the fixing component 8 and the squeezing component 9, and the syringe is fixed on the second fixing plate 301, and then connected to the injection end of the injection tube 109 by using a specific interface (such as a 6% Luer connector) on the imaging catheter 106; S3: After the syringe is fixed, the two semicircular limiting plates 204 are rotated to be pressed against the side wall of the imaging catheter 106 by the cooperation of the second driving assembly 5 and the first driving assembly 3, thereby achieving the limiting fixation of the imaging catheter 106; S4: After the syringe is fixed, the contrast agent in the injection tube 109 is injected into the imaging catheter 106 under the continuous driving action of the second driving assembly 5; S5: During the injection of contrast agent, if blockage occurs in the blood vessel, the detection component 6 will promptly warn the medical staff and remind the volunteer staff to perform intervention operations.

[0031] Working principle: When using the intravascular photoacoustic ultrasound dual-mode imaging device, firstly, the patient's blood vessel part to be examined is locally anesthetized, and then puncture is performed through the femoral artery or other suitable puncture points, and a guide catheter is inserted to the corresponding coronary artery or other target blood vessel opening, and the intravascular photoacoustic ultrasound dual-mode imaging catheter 106 is sent along the guide catheter to the target blood vessel, and finally the photoacoustic imaging mode is started, and the photoacoustic effect in the blood vessel is stimulated by laser to obtain a photoacoustic image, and the ultrasound imaging mode is started at the same time or separately, and the ultrasound image is obtained by ultrasonic scanning inside the blood vessel, and displayed on the display 103, so as to facilitate timely viewing by medical personnel; When performing intravascular imaging, the imaging catheter 106 needs to be used in conjunction with a contrast agent so that the contrast agent can be used to enhance the visibility of the internal structure of the blood vessel and make the imaging clearer. When injecting the contrast agent, first use a syringe to suck the contrast agent into the injection tube 109, and then pull the pressure plate 802 to move the pressure plate 802 away from the second fixing plate 301. After the pressure plate 802 is away from the second fixing plate 301, the syringe can be placed on the second fixing plate 301, and the pushing end of the T-shaped push rod 110 on the injection tube 109 can be placed in the U-shaped plate 601, and the pressure plate 802 is pulled away from the second fixing plate 301. During the process of fixing the second fixing plate 301, the third spring 902 will be compressed, so that the third spring 902 is deformed by force to form an elastic force. Therefore, after the injection tube 109 is placed in the second fixing plate 301, the pull on the pressure plate 802 can be released. At this time, under the elastic action of the third spring 902, the pressure plate 802 will be pushed against the side wall of the injection tube 109, so that the syringe is fixed under the pressing action of the pressure plate 802. After the syringe is fixed, it is connected to the injection end of the injection tube 109 using a specific interface (such as a 6% Luer connector) on the imaging catheter 106; After the syringe is fixed, the motor 505 is started to drive the threaded rod 504 to rotate. Under the threaded meshing transmission effect of the threaded rod 504 and the driving tube 502 and the guiding effect of the driving rod 503, the sliding plate 302 will be driven to move. During the movement of the sliding plate 302, the first L-shaped plate 303 will be driven to move, so that the inclined surfaces 305 on the first L-shaped plate 303 and the second L-shaped plate 304 will be further abutted against the two racks 306. Therefore, under the mutual force and the guiding effect of the telescopic component 4, the two racks 306 will be pushed to move, so that under the mutual meshing transmission effect of the two racks 306 and the gear 307, the belt The two rotating shafts 202 are driven to rotate. During the rotation of the two rotating shafts 202, the two semicircular limiting plates 204 are driven to rotate close to the imaging catheter 106. When the two semicircular limiting plates 204 rotate to relative positions, the side walls of the imaging catheter 106 are pressed tightly. Thus, under the pressing action of the two semicircular limiting plates 204, the imaging catheter 106 is limited and fixed, thereby reducing the risk of the imaging catheter 106 falling off due to the excessive injection speed of the contrast agent or the blockage in the blood vessel, thereby maintaining the continuity of the electrical connection between the imaging catheter 106 and the host 105, and further ensuring the integrity and continuity of the intravascular imaging; When the second driving assembly 5 pushes the first driving assembly 3 to fix the imaging catheter 106, the sliding plate 302 will be pushed to move closer to the U-shaped plate 601. When the pushing block 604 on one side of the sliding plate 302 abuts against the U-shaped plate 601, the U-shaped plate 601 will be pushed to move closer to the injection tube 109 under the elastic force of the second spring 607, and the injection plate 111 at one end of the T-shaped push rod 110 will be further pushed to move in the injection tube 109, so that the contrast agent in the injection tube 109 is injected into the imaging catheter 106. In the process of injecting the contrast agent, the first L-shaped plate 303 and the second L-shaped plate 304 will keep squeezing and pushing the two racks 306, so that the two semicircular limiting plates 204 are always against the side wall of the imaging catheter 106, thereby maintaining the firmness of limiting the imaging catheter 106. At the same time, during the injection of contrast agent, if blockage occurs in the blood vessel, the resistance of the contrast agent entering the blood vessel will increase. At this time, the movement resistance of the injection plate 111 in the injection tube 109 will increase, which will further increase the pushing force of the T-shaped push rod 110, thereby causing the pushing force of the push block 604 to be greater than the elastic force of the second spring 607, further causing the detection plate 605 on the push block 604 to move away from the injection tube 109. In the process of the detection plate 605 moving away from the injection tube 109, it will be detected by the distance sensor 606. When the distance sensor 606 detects that the movement distance limit of the detection plate 605 exceeds the set threshold, an electrical signal will be sent from the body 102, and an alarm signal will be displayed using the display 103, so as to be used to warn medical personnel and promptly remind volunteers to intervene to avoid excessive contrast agent pushing resistance caused by blood vessel blockage, thereby affecting the safety of intravascular photoacoustic ultrasound dual-mode imaging examination.

Claims

1. An intravascular photoacoustic and ultrasound dual-mode imaging device, comprising: A hospital bed (101), an imaging device and a syringe, wherein the imaging device is composed of a body (102) and a display (103) arranged on the body (102); the display (103) is connected to a host (105) via a wire (104); a plug-in end of the host (105) is connected to an imaging catheter (106) via a plug-in board (107); the hospital bed (101) is provided with a support frame (108) for supporting the host (105); the syringe is composed of an injection tube (109) and a T-shaped push rod (110) slidably connected to the injection tube (109); one end of the T-shaped push rod (110) located inside the injection tube (109) is fixedly connected to an injection plate (111); It is characterized by further comprising: A limiting mechanism (2) disposed on the host (105) and used for limiting the position of the imaging catheter (106); The limiting mechanism (2) comprises two groups of first fixing plates (201) fixedly connected to a side of the main machine (105) close to the imaging catheter (106) and arranged symmetrically with respect to each other, a rotating plate (203) being connected between two adjacent first fixing plates (201) via a rotating shaft (202), and a semicircular limiting plate (204) being fixedly connected to one end of the two rotating plates (203) away from the main machine (105), and the support frame (108) is provided with a first driving assembly (3) for driving the two semicircular limiting plates (204).

2. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 1, characterized in that: The first driving assembly (3) comprises a second fixing plate (301) fixedly connected to one side of the support frame (108); a side of the second fixing plate (301) close to the main machine (105) is connected to a sliding plate (302) via a second driving assembly (5); a side of the sliding plate (302) away from the second fixing plate (301) is fixedly connected to a first L-shaped plate (303); a side of the first L-shaped plate (303) close to the imaging catheter (106) is fixedly connected to a second L-shaped plate (304); An inclined surface (305) is provided at one end of the second L-shaped plate (303) and the second L-shaped plate (304) close to the semicircular limiting plate (204); a rack (306) is connected to one side of the two sets of the first fixing plates (201) close to the first L-shaped plate (303) through a telescopic assembly (4); one end of the two racks (306) is respectively arranged to abut against the two inclined surfaces (305); one end of the two rotating shafts (202) is fixedly connected to a gear (307); the two gears (307) and the rack (306) are arranged to mesh with each other.

3. The intravascular photoacoustic ultrasound dual-mode imaging device according to claim 2, characterized in that: The telescopic assembly (4) comprises two third fixed plates (401) fixedly connected to one side of the first fixed plate (201) close to the rack (306), a telescopic rod (402) being fixedly connected between the two third fixed plates (401), a telescopic plate (403) being slidably connected to the two telescopic rods (402), opposite sides of the two telescopic plates (403) being connected to the rack (306), side walls of the two telescopic rods (402) being sleeved with first springs (404), and two ends of the two first springs (404) being respectively connected to the third fixed plate (401) and the telescopic plate (403).

4. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 2, characterized in that: The second driving assembly (5) comprises a driving plate (501) fixedly connected to a side of the second fixed plate (301) close to the sliding plate (302); two driving tubes (502) arranged symmetrically with each other are provided on the side of the driving plate (501) close to the sliding plate (302); one end of the two driving tubes (502) is connected to the sliding plate (302); one of the two driving tubes (502) is slidably connected to a driving rod (503); one end of the driving rod (503) is connected to the driving plate (501); the other of the two driving tubes (502) is threadedly connected to a threaded rod (504); a motor (505) is fixedly connected to a side of the driving plate (501) away from the sliding plate (302); an output end of the motor (505) is connected to the threaded rod (504).

5. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 4, characterized in that: The sliding plate (302) is provided with a detection component (6) for detecting the injection resistance of the contrast agent, the detection component (6) comprising a U-shaped plate (601) slidably connected to the side of the sliding plate (302) away from the driving plate (501), the pushing end of the T-shaped push rod (110) is located in the U-shaped plate (601), a detection tube (602) is fixedly connected to the side of the sliding plate (302) close to the U-shaped plate (601), the detection tube (602) is slidably connected to a detection rod (603), and the detection rod (603) is located on the side away from the sliding plate (302). The end of the detection tube (602) is fixedly connected to a pushing block (604), one side of the pushing block (604) is fixedly connected to a detection plate (605), the sliding plate (302) is provided with a distance sensor (606), the detection end of the distance sensor (606) is arranged opposite to the detection plate (605), the side wall of the detection tube (602) is sleeved with a second spring (607), the two ends of the second spring (607) are respectively connected to the sliding plate (302) and the pushing block (604), and the sliding plate (302) is provided with a connecting component (7) for connecting to the U-shaped plate (601).

6. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 5, characterized in that: The connection assembly (7) comprises two connection tubes (701) fixedly connected to the sliding plate (302) and arranged symmetrically with each other on one side of the U-shaped plate (601); the two connection tubes (701) are slidably connected to a connection rod (702); one end of the two connection rods (702) is connected to the U-shaped plate (601); the side walls of the two connection tubes (701) are provided with connection grooves (703); the two connection grooves (703) are slidably connected to a connection pin (704); one end of the two connection pins (704) is connected to the connection rod (702).

7. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 6, characterized in that: The second fixing plate (301) is provided with a fixing assembly (8) for fixing the syringe, the fixing assembly (8) comprising a U-shaped frame (801) fixedly connected to a side of the second fixing plate (301) close to the connecting tube (701), the U-shaped frame (801) being connected to a pressing plate (802) via an extrusion assembly (9).

8. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 7, characterized in that: The pressing plate (802) is arranged in the form of an arc-shaped dovetail plate, and the degree of the arc matches the outer side wall of the injection tube (109).

9. The intravascular photoacoustic and ultrasound dual-mode imaging device according to claim 7, characterized in that: The extrusion assembly (9) comprises two extrusion rods (901) fixedly connected to the U-shaped frame (801) and symmetrically arranged with each other, the pressing plate (802) being slidably connected to the two extrusion rods (901), the side walls of the two extrusion rods (901) being sleeved with third springs (902), and the two ends of the two third springs (902) being respectively connected to the U-shaped frame (801) and the pressing plate (802).

10. An intravascular photoacoustic ultrasound dual-mode imaging method, which uses an intravascular photoacoustic ultrasound dual-mode imaging device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: When the intravascular photoacoustic ultrasound dual-mode imaging device is used, firstly, local anesthesia is performed on the patient's blood vessel portion to be examined, then puncture is performed through the femoral artery or other suitable puncture points, a guide catheter is inserted into the corresponding coronary artery or other target blood vessel opening, and the intravascular photoacoustic ultrasound dual-mode imaging catheter (106) is inserted along the guide catheter to the target blood vessel, and finally the photoacoustic imaging mode is activated to obtain a photoacoustic image and an ultrasound image; S2: When performing intravascular imaging, the syringe is fixed by the cooperation of the fixing component (8) and the squeezing component (9), and the syringe is fixed on the second fixing plate (301), and then connected to the injection end of the injection tube (109) by using a specific interface (such as a 6% Luer connector) on the imaging catheter (106); S3: After the syringe is fixed, the two semicircular limiting plates (204) are rotated to abut against the side wall of the imaging catheter (106) by means of the cooperation of the second driving assembly (5) and the first driving assembly (3), thereby achieving the limiting fixation of the imaging catheter (106); S4: after the syringe is fixed, the contrast agent in the injection tube (109) is injected into the imaging catheter (106) under the continuous driving action of the second driving component (5); S5: During the injection of contrast agent, if blockage occurs in the blood vessel, the detection component (6) will promptly warn the medical staff and remind the volunteer personnel to perform intervention operations.

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