Infrared imaging system and device for artery blood vessel morphology evaluation

Abstract

The invention relates to the technical field of infrared imaging equipment, in particular to an infrared imaging system and equipment for artery blood vessel morphology evaluation. According to the technical scheme, the device comprises a machine body, an infrared imaging module fixedly installed on the machine body and used for obtaining the skin surface and subcutaneous tissue of a target area, and an image processing module fixedly installed in the machine body. The display module is fixedly installed on the machine body and used for displaying the processed blood vessel trend and depth information in real time, and the auxiliary positioning system is fixedly installed on the machine body. The problems that the imaging contrast ratio of the artery blood vessel is insufficient due to weak depth and temperature difference signals, and the trend, depth and morphological characteristics of the artery cannot be accurately presented are solved, the artery blood vessel form can be accurately evaluated in a real-time, non-invasive and accurate mode, and the puncture safety and the operation efficiency are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of infrared imaging equipment, and in particular to an infrared imaging system and equipment for arterial blood vessel morphology assessment. Background Art

[0002] With the continuous development of minimally invasive interventions (radial / femoral artery interventional therapy), hemodialysis technology (arteriovenous fistula), and the use of various emergency equipment (IABP, ECMO, etc.), various arterial access routes have been widely used due to their advantages such as less trauma and faster recovery. However, they also bring many risks of complications such as hematoma, arterial occlusion, nerve damage, and tissue necrosis. Existing vascular assessment technologies mainly include two categories:

[0003] Category 1: Angiography, which requires injection of contrast agents and combined with X-ray imaging. It is invasive, relies on large equipment, and carries radiation risks, making it difficult to perform in real time at the bedside.

[0004] Category 2: Ultrasound imaging technology. Although it is non-invasive, the image quality is easily affected by the thickness of the patient's subcutaneous fat, blood vessel shape and operator experience. The positioning accuracy is insufficient in complex cases, and the equipment is poorly portable, making it difficult to meet the needs of rapid deployment in emergency or bedside settings.

[0005] Therefore, there is an urgent need for a simple, convenient, and non-invasive device for assessing arterial morphology to achieve the following functional objectives: 1. Assessment of superficial arterial morphology and plaque: By measuring changes in arterial morphology and diameter, characteristic changes such as vessel wall thickening and plaque formation can be detected. Examples include pre-PCI and / or other procedures requiring radial artery access, evaluation of radial artery access, and evaluation of vascular access during TAVI surgery. 2. Determination of the degree of arterial stenosis: By measuring vessel diameter and blood flow velocity, the stenosis rate can be calculated. For example, coronary angiography combined with hemodynamic analysis can accurately determine the degree of stenosis and guide treatment selection. It can also be used to assess arteriovenous fistulas (for hemofiltration) before and after dialysis and for routine maintenance (to determine the presence of blood steal). 3. Assessment of arterial function (hemodynamics): Post-operatively or after arterial device implantation, distal vascular function can be assessed. Following vascular surgery, blood flow velocity and changes in vessel diameter can be measured to assess recovery outcomes. 4. Direct surface calibration of arterial puncture points: For patients with bifurcations and those requiring special arterial puncture points, surface calibration is convenient and the puncture success rate is improved. Summary of the Invention

[0006] In one aspect, the present invention provides an infrared imaging device for arterial vascular morphology assessment, comprising a body and:

[0007] An infrared imaging module fixedly mounted on the body to capture the target area's skin surface and subcutaneous tissue;

[0008] an image processing module fixedly mounted inside the body, the image processing module being communicatively connected to the infrared imaging module, performing edge enhancement processing on the infrared thermal image data, extracting blood vessel contours, and calculating depth information of subcutaneous blood vessels based on thermal radiation gradient distribution;

[0009] A display module fixedly mounted on the body for displaying the processed blood vessel direction and depth information in real time;

[0010] An auxiliary positioning system is fixedly mounted on the body, and the auxiliary positioning system projects a visual puncture guide mark on the patient's body surface.

[0011] Optionally, a support plate is fixedly mounted on the machine body, on which a hand cooling component is fixedly mounted that adaptively fits the shape of the hand and cools the hand. The support plate is also equipped with a multi-contour adaptive fitting component that forms grooves according to the shape of the hand to provide fixed support to the hand.

[0012] Optionally, the hand cooling component includes a flexible support plate fixedly mounted on the support plate, an elastic heat conducting plate fixedly mounted inside the support plate, a cooling chamber is formed between the support plate and the heat conducting plate, and a pressure regulating component for controlling the internal pressure of the cooling chamber is connected to the cooling chamber.

[0013] Optionally, the pressure regulating assembly includes a pressurized tube fixedly mounted on a support plate and connected to the cooling chamber, a sealing plate is slidably mounted in the pressurized tube, the pressurized tube and above the sealing plate and the cooling chamber are filled with a heat-conducting medium, a first push rod motor is fixedly mounted on the machine body, the output shaft of the first push rod motor is fixedly connected to the sealing plate, and a pressure sensor is integrated in the first push rod motor.

[0014] Optionally, a water inlet pipe and a water outlet pipe connected to the cooling chamber are respectively provided at both ends of the support plate, a heat exchanger is fixedly installed on the body, the water inlet pipe and the water outlet pipe are both connected to the heat exchanger, and the heat exchanger is connected to a water cooling device.

[0015] Optionally, a metal sheet is fixedly mounted on one side of the support sheet, a second push rod motor is fixedly mounted on the machine body, and an electromagnet is fixedly mounted on the output shaft of the second push rod motor.

[0016] Optionally, the multi-profile self-adaptive fitting component comprises a flexible supporting pad fixedly installed on a supporting plate, a liquid tank is fixedly installed on the supporting plate, the liquid tank and the supporting pad form a sealed supporting cavity, one side of the liquid tank is fixedly installed with a pressurizing cylinder in communication with the supporting cavity, a first sealing plate is slidably installed in the pressurizing cylinder, a first elastic member is fixedly installed between the first sealing plate and the pressurizing cylinder, the supporting cavity and the pressurizing cylinder are filled with liquid, and a plurality of supporting and positioning assemblies are installed in the liquid tank and connected with the supporting pad to fix the shape of the supporting pad.

[0017] Optionally, the supporting and positioning assembly comprises a positioning cylinder rotatably installed in the liquid tank, a sealing head is slidably installed in the positioning cylinder, a positioning rod is fixedly installed on the sealing head and rotatably connected with the supporting pad, a positioning tank is fixedly installed at the bottom of the liquid tank, and the bottom of the positioning cylinder is in communication with the positioning tank through a hose.

[0018] Optionally, the supporting and positioning assembly further comprises a storage tank fixedly installed at one end of the positioning tank and in communication with the inside of the positioning tank, a second sealing plate is slidably installed in the storage tank, a second elastic member is fixedly installed between the second sealing plate and the storage tank, an electric control valve is fixedly installed between the storage tank and the positioning tank, the positioning cylinder is located below the sealing head, the hose, the positioning tank, the electric control valve and the side of the storage tank close to the positioning tank are filled with liquid.

[0019] Optionally, the supporting sheet and the heat-conducting sheet are in a conical structure, a contraction component is installed on the supporting sheet, the contraction component comprises a plurality of pull ropes fixedly connected with one side of the supporting sheet, a winding disc corresponding to each pull rope is rotatably installed on the machine body, the other end of each pull rope is fixedly connected with the winding disc, an electric motor is fixedly installed on the machine body, an output shaft of the electric motor is fixedly installed with a transmission shaft, and a transmission assembly is installed between the transmission shaft and the winding disc.

[0020] The transmission assembly comprises a connecting box fixedly installed on the transmission shaft, a plurality of clamping plates are rotatably installed in the connecting box, a plurality of connecting grooves with a width greater than the thickness of the clamping plates are arranged on the connecting box, a plurality of clamping grooves corresponding to the clamping plates are arranged on the inner circle of the winding disc, and a plurality of tension springs are fixedly installed between the clamping plates and the connecting box.

[0021] On the other hand, the present application further provides an infrared imaging system for arterial vessel shape evaluation, which comprises the infrared imaging device for arterial vessel shape evaluation.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] This application avoids the problem of insufficient imaging contrast due to weak depth and temperature difference signals in arterial vessels, which makes it impossible to accurately present the direction, depth and morphological characteristics of arteries. In addition, the present invention can evaluate the morphology of arterial vessels in real time, non-invasively and accurately, effectively improving puncture safety and operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the infrared imager Figure 1 ;

[0025] Figure 2 Schematic diagram of the structure of the infrared imager Figure 2 ;

[0026] Figure 3 Schematic diagram of the structure of the infrared imager Figure 3 ;

[0027] Figure 4 is a system flow chart of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the hand cooling component;

[0029] Figure 6 for Figure 5 A partial enlarged view of point A in the middle;

[0030] Figure 7 It is a schematic diagram of the connection between the pressurized pipe and the sealing plate;

[0031] Figure 8 Schematic diagram of the structure of multi-contour adaptive fitting components Figure 1 ;

[0032] Figure 9 Schematic diagram of the structure of multi-contour adaptive fitting components Figure 2 ;

[0033] Figure 10 It is a structural diagram of the contraction component;

[0034] Figure 11 It is a structural diagram of the transmission component.

[0035] Reference numerals: 1. body; 101. infrared imaging module; 102. auxiliary positioning system; 103. display module; 2. support plate; 3. hand cooling component; 301. support plate; 302. heat conducting plate; 303. cooling chamber; 304. pressurizing tube; 305. sealing plate; 306. first push rod motor; 307. water inlet pipe; 308. water outlet pipe; 309. heat exchanger; 310. metal sheet; 311. second push rod motor; 312. electromagnet; 4. multi-contour adaptive fitting component; 401. support pad; 402. liquid tank; 403. Positioning cylinder; 404. Sealing head; 405. Positioning rod; 406. Pressurizing cylinder; 407. First sealing plate; 408. First elastic member; 409. Positioning box; 410. Hose; 411. Storage box; 412. Second sealing plate; 413. Second elastic member; 414. Electric control valve; 415. Support cavity; 5. Contraction component; 501. Pull rope; 502. Winding disk; 503. Motor; 504. Drive shaft; 505. Connecting box; 506. Clamping plate; 507. Connecting groove; 508. Clamping groove; 509. Tension spring. DETAILED DESCRIPTION

[0036] The technical solution of the present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0039] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "two ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0041] Example 1, as Figures 1 to 3 As shown, on one hand, the present invention proposes an infrared imaging device for arterial vascular morphology assessment, including a body 1, an infrared imaging module 101, an image processing module, a display module 103 and an auxiliary positioning system 102.

[0042] In this embodiment, the infrared imaging device includes an optical module consisting of an infrared light source, a dichroic mirror, an infrared camera, and a green-blue projector. A 45°-tilted reflector (dichroic mirror) is placed in the projector's optical path, reflecting infrared light at a specific angle toward the infrared camera. However, it is transparent and has no reflective effect on green-blue light. Based on the infrared image of the blood vessels captured by the camera, the projector emits green-blue light, which, through the dichroic mirror, projects the same image onto the skin surface of the back of the hand captured by the infrared camera, spatially aligning the projection angle with the capture angle. An infrared filter is installed at the front end of the infrared camera, preventing green-blue light from entering the camera's photosensitive surface. This ensures that the infrared camera only identifies the radial artery in the hand without being disturbed by the green-blue image projected by the projector.

[0043] During use, the infrared imaging module 101 acquires infrared thermal images of the skin surface and subcutaneous tissue in the surgical area. The image processing module enhances, extracts edges and estimates depth of the image to reconstruct the spatial direction and depth information of the blood vessels. This information is presented through the display module 103, and the auxiliary positioning system 102 assists the surgeon in quickly identifying the ideal puncture point through laser indication or projection positioning. The device is suitable for puncture scenarios of superficial arteries such as the radial artery. The operation process is non-invasive, real-time and accurate, effectively reducing the risk of blind puncture and postoperative complications.

[0044] The device uses infrared thermal imaging technology combined with image enhancement algorithms to achieve non-contact, non-invasive real-time imaging and morphological assessment of subcutaneous arteries. Compared with ultrasound, this device does not rely on coupling agents and professional operators, avoiding image errors caused by operator inexperience or patient size differences. Compared with angiography, it avoids the risks of infection and radiation caused by invasive puncture and the use of contrast agents.

[0045] This solution uses infrared imaging module 101 to identify differences in subcutaneous temperature distribution and, combined with image processing algorithms, enables high-contrast visualization of the arterial direction, diameter, and branching structure, effectively improving the accuracy of puncture positioning and the convenience of intraoperative assessment. Furthermore, the device is compact and suitable for rapid deployment at the bedside or at the scene of treatment, making it particularly suitable for high-risk patients with complex vascular conditions. In summary, this solution significantly improves the safety and success rate of puncture procedures, reduces the incidence of complications, and offers clear advantages in clinical application.

[0046] It should be noted that the infrared imaging module 101 can be replaced with a near-infrared spectral imaging or multispectral imaging module to enhance the ability to identify deep-seated vessels or vessels with low blood flow. Secondly, the image processing module can integrate a deep learning-based vascular recognition algorithm to improve the system's accuracy in identifying abnormal vascular structures, such as tortuosity, bifurcations, or occlusions. In terms of structural design, the infrared imaging module 101 and display module 103 can be integrated into a portable handheld terminal or integrated with an existing puncture needle guide device to achieve integrated image navigation and puncture operation.

[0047] In addition to laser projection, alignment between the device and the puncture tool can also be achieved through augmented reality (AR) technology, enabling real-time overlay navigation of the vascular path within the operator's field of view. These various solutions can all improve puncture accuracy and safety without departing from the core concept of this invention, and are equivalent alternatives.

[0048] As an implementation method, Figures 1 to 3 As shown, a support plate 2 is fixedly installed on the body 1. When in use, the hand is placed on the support plate 2. A hand cooling component 3 is fixedly installed on the support plate 2 for adaptively fitting the shape of the hand and cooling the hand. When the artery and vein are parallel (such as the radial artery and the accompanying vein are closely adjacent), mislabeling may occur. By lightly pressing the skin, the vein collapses due to low pressure while the artery remains filled, which can be distinguished according to dynamic changes in the image. Local cold compress can also be used. After the cold compress, the artery quickly recovers its temperature due to the fast blood flow, and the vein changes lag behind, which can effectively prevent the problem of being unable to distinguish when the artery and vein are parallel. The support plate 2 is also equipped with a multi-contour adaptive fitting component 4 that forms a groove according to the shape of the hand to fixedly support the hand. Since the hand shapes of different patients are different, the multi-contour adaptive fitting component 4 can be used to adaptively adjust the hand shape so that the hand is embedded in the groove, which can effectively support and fix the hand.

[0049] As an implementation method, Figure 4 and Figure 6As shown, the hand cooling component 3 includes a flexible support sheet 301 fixedly mounted on the support plate 2, an elastic heat-conducting sheet 302 fixedly mounted inside the support sheet 301, a cooling chamber 303 is formed between the support sheet 301 and the heat-conducting sheet 302, and a pressure regulating component for controlling the internal pressure of the cooling chamber 303 is connected to the cooling chamber 303. By transporting a liquid with a lower temperature into the cooling chamber 303 and applying pressure to the cooling chamber 303, the cooling chamber 303 can apply pressure to the heat-conducting sheet 302, causing the heat-conducting sheet 302 to deform and fit against the skin of the hand, thereby allowing a cold compress to be applied to the hand, and through the setting of the pressure regulating component, the heat-conducting sheet 302 can apply a certain pressure to the hand, so that the hand can be evenly in contact with the heat-conducting sheet 302, and the state of pressing the skin can be simulated.

[0050] Furthermore, the pressure regulating assembly includes a pressurized tube 304 fixedly mounted on the support plate 2 and connected to the cooling chamber 303, a sealing plate 305 is slidably mounted in the pressurized tube 304, the pressurized tube 304 and above the sealing plate 305 and the cooling chamber 303 are filled with a heat-conducting medium, the heat-conducting medium is a liquid, a first push rod motor 306 is fixedly mounted on the body 1, the output shaft of the first push rod motor 306 is fixedly connected to the sealing plate 305, a pressure sensor is integrated in the first push rod motor 306, and the sealing plate 305 is driven to rise by the first push rod motor 306, so that the heat-conducting medium inside the pressurized tube 304 can be pressed into the cooling chamber 303, thereby squeezing the heat-conducting plate 302 so that the heat-conducting plate 302 can be evenly contacted with the hand.

[0051] Furthermore, the two ends of the support plate 301 are respectively provided with a water inlet pipe 307 and a water outlet pipe 308 connected to the cooling chamber 303. A heat exchanger 309 is fixedly installed on the body 1. The water inlet pipe 307 and the water outlet pipe 308 are both connected to the heat exchanger 309. The heat exchanger 309 is connected to a water cooling device. The water cooling device transports low-temperature liquid into the heat exchanger, and the heat exchanger integrates a water pump system to circulate the heat-conducting medium inside the cooling chamber 303 through the heat exchanger 309, so that the heat-conducting medium can exchange heat with the low-temperature liquid, thereby reducing the temperature of the heat-conducting medium and performing a cold compress on the hands.

[0052] Among them, a metal sheet 310 is fixedly installed on one side of the support sheet 301, a second push rod motor 311 is fixedly installed on the body 1, and an electromagnet 312 is fixedly installed on the output shaft of the second push rod motor 311. When applying a cold compress to the hand, first wrap the support sheet 301 around the hand, and pass the other end of the support sheet 301 through the support plate 2 so that the metal sheet 310 is magnetically connected to the electromagnet 312, and then tighten the support sheet 301 through the second push rod motor 311 so that the thermal conductive sheet 302 can fit the hand.

[0053] As an implementation method, Figures 4 to 9 As shown, the multi-contour adaptive fitting component 4 in this embodiment includes a flexible support pad 401 fixedly mounted on the support plate 2, the support pad 401 supports the hand, a liquid tank 402 is fixedly mounted on the support plate 2, and the liquid tank 402 and the support pad 401 form a sealed support cavity 415, a pressurizing cylinder 406 connected to the support cavity 415 is fixedly mounted on one side of the liquid tank 402, a first blocking plate 407 is slidably mounted in the pressurizing cylinder 406, and a fixed seal is formed between the first blocking plate 407 and the pressurizing cylinder 406. A first elastic member 408 is fixedly installed, and one side of the support cavity 415 and the pressurizing cylinder 406 are filled with liquid. When the arm is placed on the support pad 401, the support pad 401 will be concave and the liquid inside the liquid tank 402 will be squeezed, so that the liquid enters the pressurizing cylinder 406. Under the action of the first elastic member 408, pressure can be applied to the liquid, and the liquid can support the support pad 401, so that the support pad 401 can cover the hand to prevent a gap from appearing between the support pad 401 and the hand.

[0054] Among them, multiple groups of support and positioning components are installed in the liquid tank 402, and the support and positioning components are connected to the support pad 401 and fix the shape of the support pad 401. Since the shape of the support pad 401 can be deformed, when the support pad 401 is adjusted to be consistent with the shape of the hand, it cannot limit the hand. The support and positioning components can prevent the support pad 401 from moving, which can play a role in supporting and limiting the hand.

[0055] As an embodiment, the support positioning assembly includes a positioning cylinder 403 rotatably mounted inside the liquid tank 402, a plugging head 404 is slidably mounted in the positioning cylinder 403, a positioning rod 405 is fixedly mounted on the plugging head 404, the positioning rod 405 is rotatably connected to the support pad 401, a positioning box 409 is fixedly mounted at the bottom of the liquid tank 402, the bottom of the positioning cylinder 403 is connected to the positioning box 409 through a hose 410, and multiple positioning rods 405 are respectively connected to different positions of the support pad 401. When the positioning rod 405 cannot move, the support pad 401 connected to the positioning rod 405 It will be unable to move, thereby moving the support pad 401. When the support pad 401 is first depressed by the pressure of the hand, the positioning rod 405 will be driven to move downward, and the downwardly moving positioning rod 405 will drive the blocking head 404 to move. The moving blocking head 404 will transport the liquid inside the positioning cylinder 403 to the inside of the positioning box 409. At this time, the volume inside the positioning box 409 needs to be expanded, otherwise the blocking head 404 cannot be moved, and the total length of the positioning rod 405 and the positioning cylinder 403 cannot be changed, thereby making the support pad 401 connected thereto unable to move.

[0056] As an embodiment, the support and positioning assembly also includes a storage box 411 fixedly installed at one end of the positioning box 409 and connected to the interior of the positioning box 409, a second blocking plate 412 is slidably installed in the storage box 411, a second elastic member 413 is fixedly installed between the second blocking plate 412 and the storage box 411, an electric-controlled valve 414 is fixedly installed between the storage box 411 and the positioning box 409, the positioning cylinder 403 is located below the blocking head 404, the hose 410, the positioning box 409, the electric-controlled valve 414 and the storage box 411 on the side close to the positioning box 409 are all filled with liquid, which is a liquid that cannot be compressed under the working environment. After the liquid inside the positioning cylinder 403 is pressed down into the positioning box 409, the liquid inside the positioning box 409 will enter the storage box 411, and under the action of the second elastic member 413, the liquid inside the positioning box 409 can always be kept full. When the positioning is completed, closing the electric control valve 414 can disconnect the connection between the storage box 411 and the positioning box 409. At this time, no liquid can enter the positioning box 409, and the sealing head 404 cannot move, thereby positioning the support pad 401, so that the support pad 401 can adapt to different arm shapes, provide good support for the arm and play a role in limiting and fixing.

[0057] On the other hand, the present invention proposes an infrared imaging system for arterial vascular morphology assessment, including the above-mentioned infrared imaging device for arterial vascular morphology assessment. The system includes an infrared imaging module 101 for acquiring infrared thermal images of the skin surface and subcutaneous tissue in the surgical area. The image processing module enhances the image, extracts edges, and estimates depth to reconstruct the spatial direction and depth information of the blood vessels. This information is presented through a display module 103, and an auxiliary positioning system 102 assists the surgeon in quickly identifying the ideal puncture point through laser guidance or projection positioning. The device is suitable for puncturing superficial arteries such as the radial artery. The operation process is non-invasive, real-time, and accurate, effectively reducing the risk of blind puncture and postoperative complications.

[0058] The water cooling device transports low-temperature liquid into the heat exchanger, and the heat exchanger integrates a water pump system to circulate the heat-conducting medium inside the cooling chamber 303 through the heat exchanger 309, so that the heat-conducting medium and the low-temperature liquid can exchange heat, thereby reducing the temperature of the heat-conducting medium and applying a cold compress to the hand. By transporting low-temperature liquid into the cooling chamber 303 and applying pressure to the cooling chamber 303, the cooling chamber 303 can apply pressure to the heat-conducting plate 302, causing the heat-conducting plate 302 to deform and fit the skin of the hand, thereby applying a cold compress to the hand. The setting of the pressure regulating component can make the heat-conducting plate 302 apply a certain pressure to the hand so that the hand can be in uniform contact with the heat-conducting plate 302, and can simulate the state of lightly pressing the skin. The veins collapse due to low pressure while the arteries remain filled, which can be distinguished based on dynamic changes in the image. Local cold compress can also be used. After the cold compress, the arteries quickly recover their temperature due to the rapid blood flow, and the changes in the veins lag behind, which can effectively prevent the problem of being unable to distinguish when the arteries and veins are parallel.

[0059] When the arm is placed on the support pad 401, the support pad 401 will be concave and the liquid inside the liquid tank 402 will be squeezed, causing the liquid to enter the pressurizing cylinder 406. Under the action of the first elastic member 408, pressure can be applied to the liquid, and the liquid can support the support pad 401, so that the support pad 401 can cover the hand. Multiple positioning rods 405 are respectively connected to different positions of the support pad 401. When the positioning rod 405 cannot move, the support pad 401 connected to the positioning rod 405 will also be unable to move.

[0060] Example 2, as Figure 10 and Figure 11As shown, based on the embodiment 1, since the shape of the arm is not a standard cylindrical shape, but gradually becomes thicker from the wrist to the arm, in order to better adapt to the human body, the support sheet 301 and the heat conducting sheet 302 are formed into a tapered structure, which can better adapt to the shape of the human arm and make the heat conducting sheet 302 fit more closely. A contraction component 5 is installed on the support sheet 301, and the contraction component 5 includes a plurality of pull ropes 501 fixedly connected to one side of the support sheet 301 at one end. A winding disk 502 corresponding to the pull rope 501 is installed on the upper rotation of the body 1. When the winding disk 502 rotates, the pull rope 501 will be stretched, and then the pull rope will tighten the support sheet 301 and the heat conducting sheet 302, so that the heat conducting sheet 302 can be tightened. The heat plate 302 is in close contact with the human skin, and the other end of the pull rope 501 is fixedly connected to the winding disk 502. A motor 503 is fixedly installed on the body 1, and a transmission shaft 504 is fixedly installed on the output shaft of the motor 503. A transmission assembly is installed between the transmission shaft 504 and the winding disk 502. The transmission shaft 504 is driven by the motor 503 to rotate, and the rotating transmission shaft 504 will drive multiple winding disks 502 to rotate through the transmission assembly. Since people of different body shapes require different degrees of tightening of different parts of the body, when the winding disk 502 encounters a certain resistance during rotation, it may stop rotating, but it will not affect the continued rotation of other winding disks 502. This function can be achieved through the transmission assembly.

[0061] Furthermore, the transmission assembly includes a connecting box 505 fixedly mounted on the transmission shaft 504, a plurality of card plates 506 are rotatably mounted in the connecting box 505, a plurality of connecting grooves 507 with a width greater than the thickness of the card plates 506 are provided on the connecting box 505, a plurality of card slots 508 with which the card plates 506 are engaged are provided on the inner ring of the winding disk 502, a plurality of tension springs 509 are fixedly mounted between the card plates 506 and the connecting box 505, and under the action of the tension springs 509, the axis of the card plate 506 will coincide with the axis of the transmission shaft 504, at which time the card plate 506 is located inside the card slot 508, and at this time, through the transmission shaft 504 The connecting box 505 is driven to rotate, and the winding disk 502 can be driven to rotate through the transmission of the card plate 506. When the winding disk 502 encounters resistance and cannot rotate, the card plate 506 that continues to rotate will cause relative rotation between the card plate 506 and the connecting box 505, and the card plate 506 will be disengaged from the card slot 508 and continue to rotate. At this time, the winding disk 502 will not be driven to rotate, and multiple pull ropes 501 can be driven by a single motor 503 to be tightened synchronously, and multiple pull ropes 501 can be set, thereby improving the fit between the thermal conductive plate 302 and the skin.

[0062] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An infrared imaging device for arterial vascular morphology assessment, comprising a body (1), characterized in that: Also includes: An infrared imaging module (101) located on the body (1) for acquiring images of the skin surface and subcutaneous tissue of a target area; an image processing module disposed inside the body (1), the image processing module being communicatively connected to the infrared imaging module (101), the image processing module performing edge enhancement processing on the infrared thermal image data, extracting blood vessel contours, and calculating depth information of subcutaneous blood vessels based on thermal radiation gradient distribution; A display module (103) located on the body (1) for displaying processed blood vessel direction and depth information in real time; and an auxiliary positioning system (102) installed on the body (1), wherein the auxiliary positioning system (102) projects a visible puncture guide mark on the patient's body surface; A support plate (2) is fixedly mounted on the machine body (1), a hand cooling component (3) that is adapted to fit the shape of the hand and cools the hand is fixedly mounted on the support plate (2), and a multi-contour adaptive fitting component (4) that forms grooves according to the shape of the hand to fixedly support the hand is also mounted on the support plate (2).

2. The infrared imaging device for arterial vascular morphology assessment according to claim 1, characterized in that: The hand cooling component (3) comprises a flexible support sheet (301) fixedly mounted on the support plate (2); an elastic heat conducting sheet (302) is fixedly mounted inside the support sheet (301); a cooling chamber (303) is formed between the support sheet (301) and the heat conducting sheet (302); and a pressure regulating component for controlling the internal pressure of the cooling chamber (303) is connected to the cooling chamber (303).

3. The infrared imaging device for arterial vascular morphology assessment according to claim 2, characterized in that: The pressure regulating assembly comprises a pressurizing tube (304) fixedly mounted on the support plate (2) and connected to the cooling chamber (303); a sealing plate (305) is slidably mounted in the pressurizing tube (304); the pressurizing tube (304) and the area above the sealing plate (305) as well as the cooling chamber (303) are filled with a heat-conducting medium; a first push rod motor (306) is fixedly mounted on the machine body (1); an output shaft of the first push rod motor (306) is fixedly connected to the sealing plate (305); and a pressure sensor is integrated in the first push rod motor (306).

4. The infrared imaging device for arterial vascular morphology assessment according to claim 3, characterized in that: A water inlet pipe (307) and a water outlet pipe (308) communicating with the cooling chamber (303) are respectively provided at both ends of the support plate (301); a heat exchanger (309) is fixedly mounted on the machine body (1); the water inlet pipe (307) and the water outlet pipe (308) are both communicated with the heat exchanger (309); and the heat exchanger (309) is connected to a water cooling device.

5. The infrared imaging device for arterial vascular morphology assessment according to claim 4, characterized in that: A metal sheet (310) is fixedly mounted on one side of the support sheet (301), a second push rod motor (311) is fixedly mounted on the machine body (1), and an electromagnet (312) is fixedly mounted on the output shaft of the second push rod motor (311).

6. The infrared imaging device for arterial vascular morphology assessment according to claim 5, characterized in that: The multi-contour adaptive fitting component (4) includes a flexible support pad (401) fixedly mounted on a support plate (2), a liquid tank (402) fixedly mounted on the support plate (2), the liquid tank (402) and the support pad (401) forming a sealed support cavity (415), a pressurizing cylinder (406) connected to the support cavity (415) fixedly mounted on one side of the liquid tank (402), a first sealing plate (407) slidably mounted in the pressurizing cylinder (406), a first elastic member (408) fixedly mounted between the first sealing plate (407) and the pressurizing cylinder (406), one side of the support cavity (415) and the pressurizing cylinder (406) are both filled with liquid, a plurality of support positioning components are mounted in the liquid tank (402), the support positioning components are connected to the support pad (401) and fix the shape of the support pad (401).

7. The infrared imaging device for arterial vascular morphology assessment according to claim 6, characterized in that: The support positioning assembly comprises a positioning cylinder (403) rotatably mounted inside the liquid tank (402), a plugging head (404) slidably mounted inside the positioning cylinder (403), a positioning rod (405) fixedly mounted on the plugging head (404), the positioning rod (405) being rotatably connected to the support pad (401), a positioning box (409) fixedly mounted at the bottom of the liquid tank (402), and the bottom of the positioning cylinder (403) being connected to the positioning box (409) via a hose (410).

8. The infrared imaging device for arterial vascular morphology assessment according to claim 7, characterized in that: The support and positioning assembly further comprises a storage box (411) fixedly mounted on one end of the positioning box (409) and in communication with the interior of the positioning box (409); a second blocking plate (412) is slidably mounted in the storage box (411); a second elastic member (413) is fixedly mounted between the second blocking plate (412) and the storage box (411); an electric-controlled valve (414) is fixedly mounted between the storage box (411) and the positioning box (409); the positioning cylinder (403) is located below the blocking head (404); the hose (410), the positioning box (409), the electric-controlled valve (414) and the storage box (411) on one side close to the positioning box (409) are all filled with liquid.

9. The infrared imaging device for arterial vascular morphology assessment according to claim 8, characterized in that: The support plate (301) and the heat conducting plate (302) are of conical structure. A contraction component (5) is installed on the support plate (301). The contraction component (5) includes a plurality of pull ropes (501) one end of which is fixedly connected to one side of the support plate (301). A winding disk (502) corresponding to the pull ropes (501) is rotatably installed on the upper portion of the machine body (1). The other end of the pull rope (501) is fixedly connected to the winding disk (502). A motor (503) is fixedly installed on the machine body (1). A transmission shaft (504) is fixedly installed on the output shaft of the motor (503). A transmission assembly is installed between the transmission shaft (504) and the winding disk (502). The transmission assembly comprises a connection box (505) fixedly mounted on a transmission shaft (504); a plurality of clamping plates (506) are rotatably mounted in the connection box (505); a plurality of connection grooves (507) having a width greater than a thickness of the clamping plates (506) are provided on the connection box (505); a plurality of clamping grooves (508) for clamping with the clamping plates (506) are provided on the inner ring of the winding disk (502); and a plurality of tension springs (509) are fixedly mounted between the clamping plates (506) and the connection box (505).

10. An infrared imaging system for arterial morphology assessment, characterized in that: The infrared imaging device for arterial vascular morphology assessment as described in claim 9 above.

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