154 results about "Vascular Stenosis" patented technology

The invention relates to the technical field of health status assessment, in particular to a cardiovascular disease layered early warning system, which is characterized in that blood vessel compliance and pulse wave velocity are extracted, arterial dilation capacity is measured, blood vessel elasticity is calculated, blood perfusion distribution is detected, and abnormal vasoconstriction is classified on the basis of a hemodynamic state and a heart electrical activity state; in combination with the thickness of the blood vessel wall and the blood vessel stenosis rate, the plaque deposition condition is analyzed, the arteriosclerosis score is calculated, the thrombosis tendency is detected, the local blood flow blocking degree is quantified, the isolation forest algorithm is adopted, the blood flow dynamic change is calculated, the heart rhythm abnormality is analyzed, the acute vascular occlusion probability is measured, and the sudden heart rhythm abnormality risk is evaluated. And based on a gradient boosting tree algorithm, screening high-risk cases, matching medical intervention measures, setting a risk buffer mechanism, adjusting an individual health management strategy, and optimizing a cardiovascular risk hierarchical early warning system.

The invention relates to the field of medical image processing, and discloses a coronary artery stenosis detection method and system based on an angiography image. The method comprises the following implementation steps: collecting a coronary sequence video, sampling and labeling blood vessel frames in the coronary sequence video under the guidance of a professional doctor, and obtaining a coronary angiography image set and a coronary angiography background data set; using a fine-tuned diffusion model DDPM to extract a potential feature map of the blood vessel, and performing channel remodeling on the potential feature map and an original coronary artery image; performing dimension feature extraction on the coronary angiography image, and extracting features of a corresponding layer in the backbone network; then, narrow feature enhancement and multi-scale Transform operation are carried out on the extracted feature mapping; and finally carrying out feature fusion on the feature mapping of different layers and then sending to a detection head module for prediction. According to the method, the detection effect of coronary artery stenosis can be improved, a foundation is established for subsequent quantitative detection of vascular stenosis, and the method has a great application prospect.

The present invention relates to medical devices and methods for treating a lesion such as a vascular stenosis using non-thermal irreversible electroporation (NTIRE). Embodiments of the present invention provide a balloon catheter type NTIRE device for treating a target lesion comprising a plurality of electrodes positioned along the balloon that are electrically independent from each other so as to be individually selectable in order to more precisely treat an asymmetrical lesion in which the lesion extends only partially around the vessel.

The invention relates to the technical field of medical instruments, in particular to a nicking instrument based on a paper-cut structure, which comprises a destressing sleeve and a catheter seat, and further comprises a pushing section, a metal tube and a hollow head, the right end of the destressing sleeve is connected with the catheter seat, the pushing section is mounted at the left end of the destressing sleeve, and the other end of the pushing section is connected with the metal tube; the pushing section and the metal tube are coaxially connected, a PTA balloon penetrates through the catheter base, the stress relieving sleeve and the pushing section and enters the metal tube after penetrating through the pushing section, the PTA balloon is embedded in the metal tube, the tail end of the metal tube is connected with a bullet-shaped hollow head, when the PTA balloon is full, the surface of the cut metal tube begins to expand, and when the surface of the cut metal tube is expanded, the surface of the cut metal tube is expanded. When the surface of the metal tube expands to a certain degree, the expansion process of the metal tube cannot be continued due to the limitation of the included angle of the rhombus, at the moment, the continuous expansion force of the PTA balloon enables the node of the cutting section to drive the connecting rod to overturn together, and the overturned connecting rod can apply circumferential force to the narrow part of the blood vessel.

The invention relates to the technical field of medical interventions, and discloses a difficult-to-layer composite woven balloon and a preparation method thereof, the difficult-to-layer composite woven balloon comprises an inner balloon and a fiber line structure woven on the outer surface of the inner balloon; the fiber thread structure is divided into warp threads and weft threads, the fiber threads extending in the diameter direction of the balloon are the warp threads, and the fiber threads extending in the axial direction of the balloon are the weft threads; the inner balloon is sequentially subjected to surface treatment, primer treatment, fiber weaving, surface treatment, surface sizing and surface curing treatment. The preparation process does not need complex special equipment, the material requirement is reasonable, the repeatability is high, the production difficulty and cost are reduced, convenience is provided for large-scale application of the material, and the material has extremely high practical value and popularization potential in medical scenes such as vascular stenosis dilation and calculus dilation pathway establishment.

Embodiments herein are directed to a vascular stenosis treatment apparatus including a treatment assembly having a balloon, the wall of the balloon being provided with a plurality of first holes for liquid to pass through, and the balloon having an unexpanded state and an expanded state; a covering member covering the outside of the balloon and expanding with the expansion of the balloon, the covering member having a plurality of second holes, and when the balloon is in the expanded state, the aperture of the first holes being smaller than the aperture of the second holes. The treatment apparatus can achieve accurate positioning, and the covering member has a limiting effect on a drug solution causing the drug to more uniformly and effectively act on a desired position of a vascular wall, increasing the utilization rate, reducing the occurrence rate of vascular restenosis, and improving the treatment effect.

The invention provides a balloon catheter suitable for long vasculopathy, and relates to the technical field of medical instruments. The first balloon is arranged at the far end of the catheter body; the diameter of the near end of the first balloon is larger than that of the far end of the first balloon. A through inner cavity is formed in the middle of the catheter body, and a communicating channel communicating the first balloon with the inner cavity is formed in the side wall of the catheter body. By arranging the first balloon and the second balloon, the first balloon extrudes the second balloon after expanding, so that a contrast agent in the second balloon is gradually extruded out, the second balloon deforms, and the deformed second balloon is better attached to the narrow part of a blood vessel and can better adapt to the change of the inner diameter of a channel at a longer blood vessel.

Coronary artery disease is the most common disease in the cardiovascular field and is also one of important factors causing death in the global range, and by conducting blood vessel segmentation and stenosis detection on coronary angiography images, doctors can diagnose the coronary heart disease more accurately. The invention provides a brand new deep learning architecture SAM-VMNet, and the model combines the powerful feature extraction capability of MedSAM and the linear complexity advantage of a visual state space model of VM-UNet, so that the model has higher reasoning speed and stronger data processing capability than Transformer, and higher segmentation accuracy and stability of coronary angiography images are realized. Moreover, a'dynamic queue 'is used for capturing the narrow part of the blood vessel, and the narrow part is compared with the normal blood vessel diameter before and after the narrow part, so that quantitative calculation of the blood vessel stenosis degree is realized. The algorithm is high in operation speed, and full-automatic blood vessel contour extraction and stenosis degree detection can be achieved. The kit can be applied to the clinical diagnosis process of coronary heart disease.

The invention relates to the technical field of blood vessel stenosis grading, in particular to a blood vessel stenosis degree grading system based on coronary angiography images. The method comprises the following steps: dividing a vascular skeleton line of an angiography image into vascular segments based on a bifurcation point, and determining a stenosis point on the vascular segment according to the blood flow velocity difference of the vascular segment at the front edge position of a contrast agent in each frame of angiography image and a neighborhood angiography image; according to the blood vessel diameter difference between each bifurcation point and the other bifurcation points and the distance between the other bifurcation points and the main blood vessel section, a reference adaptation degree is obtained, a reference point of each bifurcation point is selected, and according to the blood flow speed difference between each bifurcation point and the branch blood vessel section of the reference point and the reference adaptation degree, narrow points in the bifurcation points are screened; and grading the blood vessel stenosis degree based on the blood vessel diameter of the stenosis point. The blood vessel skeleton line is divided into two conditions of the blood vessel segment and the bifurcation point to analyze the blood vessel physiological stenosis position, and the accuracy of positioning the pathological stenosis position in the coronary artery is improved.

The invention discloses a medical image curative effect evaluation system based on artificial intelligence, and the system is characterized in that an acquisition module obtains a clinical vascular medical image, builds an image database according to the clinical vascular medical image, and builds a high-resolution vascular three-dimensional image according to the image data in the image database; a positioning recognition module receives the blood vessel three-dimensional image and inputs the blood vessel three-dimensional image into a trained blood vessel positioning model, and the blood vessel positioning model automatically recognizes the blood vessel position and level in the blood vessel three-dimensional image; the evaluation module is used for cutting and calculating the blood vessel three-dimensional image according to the recognized blood vessel position and level and a preset size, and evaluating whether the lesion position and lesion type of the blood vessel with blood vessel stenosis, blood vessel dilatation and blood vessel thickening occur or not according to a calculation result; the technical problem that the prior art is difficult to accurately evaluate the curative effect of vascular diseases is solved.

The present invention relates to the technical field of medical image processing, and disclosed are a method and device for calculating blood flow at any position of a blood vessel tree. The method comprises: acquiring angiography image sequences, and performing structure extraction on images in the angiography image sequences to obtain two-dimensional blood vessel skeleton lines; performing three-dimensional reconstruction on the basis of the two-dimensional blood vessel skeleton lines to obtain a three-dimensional blood vessel model; determining a corresponding target blood vessel area on the basis of the three-dimensional blood vessel model, and calculating corresponding average blood flow in the target blood vessel area on the basis of transfer frame quantities corresponding to the angiography image sequences; reconstructing a reference blood vessel diameter on the basis of a corresponding blood vessel diameter in the target blood vessel area, and determining a blood vessel stenosis area on the basis of the blood vessel diameter and the reference blood vessel diameter; and calculating corresponding target blood flow at a target position in the target blood vessel area on the basis of the blood vessel stenosis area and the average blood flow. According to the present invention, blood flow at any position of blood vessels can be accurately calculated.

The invention provides a calcification section coronary artery risk prediction method and device based on chest CT (Computed Tomography) plain scanning. The method comprises the following steps: firstly, acquiring and screening chest CT (Computed Tomography) plain-scan image data; secondly, performing calcification section coronary artery labeling on the image data; thirdly, performing CCTA image interpretation and grouping on the marked areas; and finally, collecting a CT image and a classification label model corresponding to the CT image, using a ResTransNet network to extract features from the calcification section coronary artery label, training the ResTransNet model, and predicting a risk state. According to the method, the deep learning method is applied to the coronary artery of the calcification section of chest CT flat scanning, the plaque type and the blood vessel stenosis degree are accurately predicted, and effective information is provided for subclinical coronary atherosclerosis risk screening and prevention; constructing plaque types and coronary artery stenosis degrees gt; and the prediction device has great clinical significance when being used for screening the risk of subclinical coronary atherosclerosis.

The invention provides a method and a system for removing calcification artifacts of a CT (Computed Tomography) image. The method comprises the following steps of: preprocessing the CT image; semantic feature information extraction is carried out on the preprocessed CT image; fusing the preprocessed CT image and the semantic feature information, and inputting the fused image and semantic feature information into a GAN-based artifact removal model to eliminate calcification artifacts so as to realize noise reduction; an improved perception extraction module is introduced into a generator, and a global / local-semantic judgment module is added into a discriminator, so that the image noise reduction effect after the calcification artifacts are removed is further improved. By means of the GAN-based artifact removal model, common noise reduction can be effectively achieved, meanwhile, calcification artifacts in the CT image are removed, so that the quality of the CT image is improved, the judgment accuracy of a doctor for the blood vessel stenosis degree is further improved, and then the misdiagnosis rate of CT diseases is reduced.

The utility model discloses an intracranial vascular stenosis treatment device which is provided with a far end and a near end which are opposite to each other, and comprises an inner tube, an outer tube and an inner tube, the balloon body comprises a balloon wall, the balloon wall forms a balloon cavity on the periphery of the inner tube, and the balloon wall is provided with an optical distribution structure; the outer tube is arranged outside the inner tube in a sleeving mode, the far end of the outer tube is communicated with the balloon cavity, and a radial gap between the outer tube and the inner tube serves as a fluid channel communicated with the balloon cavity; the light-emitting component is located in the balloon cavity and provides first light rays, the first light rays are diverged towards the periphery of the balloon body through the optical distribution structure, and the first light rays are 400 nm to 1200 nm. According to the intracranial vascular stenosis treatment device, the first light rays which are evenly distributed are used for repairing the inner wall of the blood vessel in the balloon dilatation process, full dilatation is achieved as much as possible on the premise that safety is guaranteed, and meanwhile the first light rays play a role in restraining stenosis.

The invention discloses a long-section peripheral vascular stent which is used for treating diseases such as peripheral vascular stenosis below knees and the like and solves the problems that an existing stent is difficult to introduce into peripheral blood vessels and lacks effective support. The stent has two states of a pressing and holding state and an expansion state with different section radiuses, is implanted into a peripheral vascular affected part in the pressing and holding state, and supports a blood vessel at the affected part in the expansion state. Sufficient radial yield strength is provided through a plurality of supporting rings so as to adapt to the characteristics that the peripheral blood vessel is large in elasticity and thick in outer base layer. And the stent is prepared from a degradable material, so that mechanical support required in the early stage of fusion is met, the stent also has relatively high strength and toughness, and the stent can be degraded in vivo, so that the use safety is greatly improved. Moreover, the pattern of the stent is optimized, so that the circumferential rotation phenomenon of the longer intravascular stent in the expansion process is improved, and the damage to the vascular wall in the implantation process is reduced to the greatest extent.

In the blood vessel projection visualization method and the program product provided by the invention, a first image of computed tomography angiography and a second image of digital subtraction angiography in a target area are acquired, a blood vessel path and a plaque area in the first image are determined, and a grid structure of the blood vessel path is constructed; and according to the position relationship between the grid structure and the plaque region in the first image, obtaining the shielding relationship between the grid structure and the plaque region, and based on the shielding relationship, rendering the grid structure and the plaque region in the second image to obtain a fused image. By constructing the grid structure of the blood vessel path and rendering the grid structure and the plaque region in the second image based on the shielding relationship between the grid structure and the plaque region to obtain the fused image, the blood vessel stenosis degree, the blood vessel dilation degree and the plaque position are displayed, and the blood vessel stenosis degree and the blood vessel dilation degree are displayed at the same time. And the position relationship between the grid structure and the plaque region in the mapping direction of the second image is intuitively reflected.

The invention provides a cutting woven type stent, and belongs to the technical field of medical instruments for treating vascular diseases. The stent comprises an intravascular stent body, a medicine carrying groove used for containing medicine is formed in the outer surface of the intravascular stent body, sustained-release capsules are fixedly distributed in the medicine carrying groove, each sustained-release capsule is provided with a shell, a containing cavity is formed in the shell, and medicine particles and a shell breaking component are loaded in the containing cavities of part of the sustained-release capsules; the medicine assembly for rapidly treating intracranial vascular stenosis further comprises a driving component, and the driving component is arranged in vitro and used for driving the shell breaking component to rapidly break the shell so as to rapidly release medicine particles in the shell. The drug eluting stent is mainly used for solving the technical problem that a drug eluting stent in the prior art cannot quickly release drugs and cannot quickly generate a treatment effect.

The invention refers to endovascular catheters and methods useful to endovascular surgery. In particular, it refers to support catheters with balloons that are used for the placement or the forwarding of the guidewire through demanding tortuosity and important vascular stenoses in cases where the guidewire needs the best possible backup support of the catheter. This is achieved with the development of an endovascular support catheter (1) with a mobile balloon (22), which has the ability to move along the body of the catheter (2), at its distal part. The movement of the balloon (22) is achieved with the use of two mobile external rings (13) and (18), one inner wire circuit (23), (24), and one control handle (13) (17) which is found at the proximal end of the device (1). The mobile balloon allows the catheter to move inside the vessel even when it is inflated and basically anchored within the vessel.

The invention relates to the technical field of manufacturing of medical instruments, in particular to an intracranial controllable drug balloon dilatation catheter and a drug delivery method for a narrow area of a blood vessel. According to the intracranial controllable medicine balloon dilatation catheter, the inner-layer catheter body is arranged in the outer-layer catheter body in a sleeved mode and fixedly connected with the far end of the outer-layer catheter body; the balloon is assembled on the outer-layer tube body and is provided with a plurality of dosing holes along the circumferential direction; a medicine adhesion layer is compounded on the surface of the balloon section of the outer-layer tube body; the stress releasing pipe is connected to the end, close to the operation end, of the outer-layer pipe body. The Y-shaped tube base is connected to the end, away from the outer-layer tube body, of the stress releasing tube, one connector is connected with an injection device to inject medicine carriers into the balloon, and the other connector is used for a guide wire to penetrate through. When intracranial vascular stenosis is treated, directional drug release can be achieved by means of the drug delivery holes and the drug adhesion layer. The medicine is sprayed to the focus through the administration hole, the medicine is promoted to permeate into the middle layer of the blood vessel wall through the attaching force generated by the balloon expansion, the problems of non-uniform liquid medicine distribution, insufficient permeation and the like are effectively solved, and the local medicine concentration and the treatment effect are improved.

The invention provides a blood vessel stenosis rate prediction method, model and system, and the method comprises the steps: obtaining an angiography image, carrying out the blood vessel segmentation processing of the angiography image, and obtaining a blood vessel segmentation map; then the blood vessel segmentation map is used as input of a pre-trained deep learning-based blood vessel stenosis rate prediction model, a blood vessel stenosis rate distribution map is output after prediction is carried out through the prediction model, and the blood vessel stenosis rate distribution map comprises a plurality of first pixels. According to the prediction model, method and system, the deep learning technology is combined with clinical medicine, the blood vessel stenosis condition is accurately calculated through the deep learning technology, the method and system can adapt to medical images of different qualities, the prediction speed is high, the prediction result is accurate and consistent, the diagnosis specification and standard of doctors are kept, and the diagnosis efficiency is improved. And the defect of poor interpretability of deep learning is overcome, and the method is a high-accuracy blood vessel stenosis rate prediction method.

The utility model relates to the related technical field of interventional radiography, in particular to a multifunctional connector operation T tube for interventional radiography, which comprises an interventional slim tube, a pushing block, a vent hole, an air outlet tube and an air bag, the inner side surface of the interventional tube is connected with the interventional slim tube, and the outer side surface of the interventional slim tube is provided with the pushing block. According to the multifunctional connector surgical T-tube for interventional radiography, the inflation mechanism is usually used together with a balloon, blood vessels or other channels can be expanded by inflating the instrument so that interventional treatment can be better carried out, the T-tube is particularly useful for treating the situation of blood vessel stenosis or blockage, the stability of the T-tube or a catheter can be improved by using the inflation mechanism, and the T-tube or the catheter can be conveniently used. It is helpful to ensure its accurate positioning in a target area, which is particularly important for interventional procedures requiring accurate positioning and manipulation, providing additional support to maintain the patency of the blood vessel or channel, which may be beneficial in treating vascular stenosis or repairing vascular walls.

The application discloses a kind of iron agent enhanced whole body blood vessel multi-modal magnetic resonance imaging method, system, the method comprises: after target is divided into multiple scanning stations from head to foot, iron agent enhanced whole body blood vessel bright blood imaging is carried out;Automatic positioning whole body blood vessel stenosis and quantifying its stenosis degree, and output the scanning station and position range information of blood vessel stenosis region;Judge whether there is blood vessel stenosis region meeting condition;According to its spatial position information, guide MRI system examination bed to move for blood vessel stenosis region meeting condition, and carry out local black blood imaging with not less than the spatial range of blood vessel stenosis region;Blood vessel stenosis region exists in interval period and carries out local bright blood imaging to the scanning station, obtains blood vessel cavity structure image;Local bright blood imaging is registered with whole body blood vessel bright blood imaging, and the information transmission of blood vessel stenosis region is completed, and local inflammation imaging is carried out.The application realizes the multi-modal imaging evaluation of whole body blood vessel in clinically acceptable scanning time.

The invention provides a balloon dilatation catheter capable of being filled in a segmented mode, and belongs to the technical field of balloon dilatation catheters. The balloon dilatation catheter comprises a catheter body, an operating handle and a balloon body, the catheter body is used for being guided into a target blood vessel, and a filling channel extending in the axial direction is formed in the catheter body; the operating handle is arranged at the near end of the catheter body and is used for filling and discharging the filling medium into the filling channel; the balloon body is arranged at the position, close to the far end by a set distance, of the catheter body, a plurality of filling cavities are formed in the balloon body in the axial direction, a filling channel is communicated with the filling cavity at the farthest end, and a partition assembly is arranged between any two adjacent filling cavities and used for ensuring that the filling cavities are communicated with the filling cavity at the farthest end in the balloon body filling process. The plurality of filling chambers are sequentially filled from the far end to the near end; the balloon dilatation catheter is mainly used for solving the technical problems that in the prior art, a balloon dilatation catheter is integrally and synchronously filled and easily slips at a narrow blood vessel part, and a narrow area is difficult to accurately dilate.

The invention provides a guide catheter as well as a preparation method and application thereof, and the guide catheter comprises the following components in parts by weight: 100 parts of a matrix material; 5 to 10 parts of tripropyl citrate; 1 to 5 parts of polycaprolactone glycol; 5 to 10 parts of 1, 4-butanediol sulfate; 0.5 to 3 parts of a coupling agent; and 0.1-0.5% of an antioxidant. According to the guide catheter, the flexibility and lubricity of the base body are cooperatively regulated and controlled through all the materials, the rebound recovery rate of the catheter is increased, the deformation recovery capacity of the catheter when the catheter passes through a narrow or bent part of a blood vessel is greatly improved, creases or permanent bending is effectively avoided, and the controllability and safety in the pushing process are improved.

The application discloses an arteriovenous fistula blood vessel lining support and a use method thereof, and the arteriovenous fistula blood vessel lining support has a three-way pipe structure; the axes of two passages in the three-way pipe structure are on a straight line to form a straight pipe, and the axis of the other passage has a variable included angle with the straight line formed by the axes of the first two passages to form a bifurcated pipe; the straight pipe and the bifurcated pipe jointly form a three-way shape of the support with an inner cavity and have optional additional structures near each port; the straight pipe is used for being implanted into an arterial blood vessel; and the bifurcated pipe is used for sleeving a venous blood vessel which needs to be connected. After the arteriovenous fistula blood vessel lining support is embedded, the occurrence of turbulent flow is effectively reduced, blood composition deposition is reduced, the probability of vascular hyperplasia and vascular stenosis is reduced, the arteriovenous fistula maturation time is shortened, and the use time of the fistula is prolonged.

The invention relates to the technical field of image processing, in particular to a coronary artery angiography image blood vessel stenosis degree intelligent grading system which is used for obtaining angiography images of a coronary artery at multiple visual angles and the image quality score of each angiography image. Identifying a narrow point in each contrast image, and determining the single-view-angle narrow degree of the narrow point in each contrast image; matching the narrow points in the contrast images of different visual angles to obtain a matched narrow point of each narrow point in the contrast image of each visual angle in the contrast images of other visual angles; determining the final stenosis of each actual stenosis point in the coronary artery based on the single-view stenosis of each stenosis point, the single-view stenosis of the matched stenosis point of each stenosis point and the image quality score of each contrast image; and evaluating the stenosis level of each actual stenosis point based on the final stenosis degree of each actual stenosis point. The system can improve the accuracy, objectivity and reliability of narrowness measurement.

The invention discloses a nattokinase product for preventing and / or treating atherosclerosis and application of the nattokinase product. Cardiovascular diseases become the primary reason of human death, and the vascular plaque problem caused by atherosclerosis is always a difficult problem to be solved urgently. Blood vessel stenosis caused by plaques is a main cause of cerebral arterial thrombosis, and traditional medicines and operations face the problems of low compliance, side effect risk, indication limitation and the like. The invention provides nattokinase or a product thereof for high-risk groups with cardiovascular diseases, and the nattokinase or the product thereof is preferably in a non-drug form. As a precise nutrition intervention means, nattokinase is effective in plaque progress inhibition, unique in effect, safe to eat, convenient, easy to implement and wide in applicable crowd. The invention provides a new thought and method for management of vascular plaques and prevention and treatment of cardiovascular diseases.

The present application relates to the technical field of blood vessel stenosis grading, and particularly relates to a blood vessel stenosis degree grading system based on coronary angiography images. The present application divides the blood vessel skeleton line of the angiography images into blood vessel segments based on bifurcation points, determines the stenosis points on the blood vessel segments according to the blood flow velocity difference of the contrast agent front position of the blood vessel segments in each frame of the angiography images and its neighboring angiography images, obtains the reference adaptation degree according to the blood vessel diameter difference of each bifurcation point and the rest bifurcation points, and the distance between the rest bifurcation points and the main blood vessel segment, selects the reference point of each bifurcation point, screens the stenosis points in the bifurcation points according to the blood flow velocity difference of the branch blood vessel segments of each bifurcation point and its reference point and the reference adaptation degree, and grades the blood vessel stenosis degree based on the blood vessel diameter of the stenosis points. The present application divides the blood vessel skeleton line into blood vessel segments and bifurcation points to analyze the physiological stenosis position of the blood vessel, and improves the accuracy of positioning the pathological stenosis position in the coronary artery.

The invention discloses an intracranial posterior circulation vascular stenosis functional evaluation method and system, electronic equipment and a computer readable storage medium, and provides a vascular stenosis functional evaluation method based on bilateral blood flow conditions by fully considering the combined action of intracranial bilateral vertebral arteries on blood flow supply. The problem that in the prior art, only one side vertebral artery is considered to conduct vascular stenosis function evaluation, and the accuracy is low is solved, if only one side of the vertebral artery on the two sides of a patient has lesion, the compensation function of the opposite side healthy vertebral artery is neglected in the prior art, the influence of lesion on vascular function can be overestimated, and the vascular stenosis function evaluation accuracy is improved. According to the method, the bilateral vertebral arteries are coupled through the pressure drop constraint condition, and the intracranial posterior circulation vascular stenosis functional evaluation is comprehensively performed in combination with the condition of the basilar artery, so that the method is more accurate, and the output evaluation dimension is wider.

Embodiments of the present invention relate to a method and apparatus for analyzing angiographic images. The method comprises: acquiring an angiographic image; detecting vascular stenosis sites and using a sub-image of the detected stenosis sites as a first image; performing binarization and image noise reduction to generate a first binary image; performing vessel identification to generate a vascular image; extracting a centerline from the vascular image in the first binary image without changing the topological properties of the vascular image to generate a first centerline; sorting pixels on the first centerline to generate a first pixel sequence; measuring the vascular diameter at each first pixel to generate a first diameter; identifying the vascular stenosis rate at each first pixel to generate a corresponding first stenosis rate; and returning the first pixel sequence, first diameter sequence, and first stenosis rate sequence as vascular stenosis analysis data for the angiographic image. The present invention can improve analysis accuracy.