338 results about "Pantomography" patented technology

The invention relates to the technical field of ophthalmologic image processing, and discloses a fundus blood vessel segmentation method based on multi-modal data. The method comprises the following steps: firstly, synchronously acquiring an optical coherence tomography image, a color fundus photographic image and a fluorescent angiography image to form multi-modal fundus data; preprocessing the eye fundus image data set to generate a standardized multi-mode eye fundus image data set; fusing heterogeneous features based on the data set, and constructing a multi-dimensional fundus feature space; using the space to train a deep learning segmentation network model, and generating an initial fundus blood vessel segmentation mask; carrying out confidence evaluation analysis on the initial mask to obtain a blood vessel segmentation result confidence distribution map; dividing blood vessel segmentation quality grades according to the distribution diagram, and defining a judgment rule; and performing interactive correction on the low-confidence region based on a rule to generate a final optimized fundus blood vessel segmentation result. And the final result is transmitted to a visual terminal for three-dimensional topology reconstruction. According to the method, the advantages of multi-modal data are integrated, and a more comprehensive fundus blood vessel segmentation result is formed.

The invention relates to a real-time three-dimensional reconstruction method based on intracavity ultrasound and fistula radiography, which comprises the following steps of: extracting a fistula channel projection path through a fistula expansion outline after a contrast agent is injected during radiography; the ultrasonic probe is linked to detect the tissue interface change in the image, and reverse matching is carried out on the tissue interface change and a high-density area of the radiography image; establishing a spatial perspective calibration system based on an imaging cone projection relation, and estimating a rotation / translation pose of the intracavity ultrasound image ICE in a three-dimensional space; outputting a spatial state sequence of the ICE frame; performing curved surface resampling on the ICE image, and establishing a sectioned image stack; continuously receiving a new ICE image and a contrast frame; performing model fine tuning through a local deformation field; operating a spatial feature extraction network on the fistula volume model; judging local expansion / contraction and curvature change in the three-dimensional model to identify a fistula opening point; a fistula main channel and branch paths are analyzed, and the fistula complexity level is judged through topology analysis; and comparing with a preoperative map to assist in preoperative pre-judgment and intra-operative path planning.

The invention discloses a cardiovascular intervention catheter storehouse scheduling system based on demand analysis, and relates to the technical field of medical informatization, and the system comprises a data collection module which is used for obtaining an operation plan, a doctor identifier, a step sequence and an angiography image; the feature extraction module is used for generating a situation feature vector according to the contrast image; the standard deduction module is used for deducing subsequent steps and corresponding catheter sets; the selection probability calculation module is used for querying a doctor preference knowledge base in combination with the doctor identifier, the step code and the feature vector to obtain catheter selection probability distribution; the first judgment module is used for outputting a predicted catheter model if the catheter selection probability exceeds a first threshold value, otherwise, counting the catheter use frequency of the historical data of the doctor; the second judgment module is used for outputting the corresponding catheter model if the use frequency exceeds a second threshold value, otherwise, determining a predicted catheter model from the standard catheter set according to a rule; the accuracy and clinical suitability of catheter prediction can be improved.

Methods and systems for foveal avascular zone (FAZ) segmentation of a retina. A three dimensional optical coherence tomography angiography (OCTA) volume of a retina of a subject is received. The OCTA volume comprising a plurality of layers. A slab input for a model system is formed using the OCTA volume. The model system comprising a deep learning model. A set of mask images is generated, via the model system, based on the slab input. The set of mask images includes an area mask image that accurately and reliably identifies an area of a foveal avascular zone captured by the OCT volume.

The invention discloses an intracranial anterior artery circulation functional evaluation method and device, computer equipment and a storage medium, and relates to the field of vascular function evaluation, and the method comprises the steps: based on an intracranial angiography image and near-end pressure data, carrying out the five working processes of data input, blood vessel segmentation and segmentation, boundary condition calculation, hemodynamic simulation and functional parameter calculation; according to the method, functional parameters verified in the coronary artery field are migrated to intracranial blood vessel evaluation without additional equipment, the clinical problem that traditional morphological evaluation is not matched with functionality is solved, individualized function quantification is achieved by integrating blood vessel morphological characteristics and hemodynamic simulation, and the method is suitable for being applied to intracranial blood vessel evaluation. According to the method, an objective basis is provided for cerebrovascular disease diagnosis and treatment, the intracranial vascular disease is promoted to be converted from anatomy orientation to function orientation, the clinical decision accuracy is remarkably improved, popularization and application of functional evaluation in the field of neural intervention are accelerated, and construction of a cerebrovascular disease accurate diagnosis and treatment system is assisted.

The invention relates to the technical field of medical imaging, and discloses a peripheral lung cancer pleural invasion evaluation system based on ultrasonic targeted radiography, comprising: a double-frequency ultrasonic probe configured to independently work at different frequencies to realize depth imaging and high-resolution imaging of lung tissues and suitable for different types of lung lesions; the signal processing module can receive, analyze and process echo signals transmitted by the ultrasonic probe, generate images in real time and extract feature information; and the dynamic motion compensation module is used for automatically adjusting the emission time sequence and parameter setting of the ultrasonic signal based on the real-time breathing motion state of the patient. By adopting the design of the double-frequency ultrasonic probe and the core-shell structure, high-resolution imaging and depth detection of lung tissues are realized. By dynamically adjusting the thickness of the probe shell to be matched with the frequency, the system can adapt to complex tissue environments under different physiological conditions, and image definition and stability are ensured.

The invention belongs to the technical field of DSA, and discloses a DSA platform-based multi-state real-time multi-mode image accurate fusion method. After an angiography image is collected on the basis of DSA equipment under the motion condition, accurate DSA blood vessel subtraction image enhanced display is achieved, meanwhile, hepatic artery extraction in a three-dimensional image in preoperative CT is completed, dynamic intelligent fusion of a precise anatomical structure in a preoperative multi-mode CT image and intraoperative local blood vessel development is combined, and the dynamic and intelligent fusion of the dynamic and intelligent fusion of the dynamic and intelligent fusion of the dynamic and intelligent fusion of the dynamic and intelligent fusion of the dynamic and intelligent fusion of the dynamic and intelligent fusion of the dynamic and intelligent fusion is achieved. The intrahepatic lesions and important blood vessels are accurately and visually displayed, operation planning is completed, fusion of three-dimensional information and two-dimensional DSA is utilized, and transvascular and percutaneous interventional operations are accurately guided.

According to the multifunctional heart color ultrasound acoustic contrast examination device, the stirring mechanism is arranged in the cylinder, and the sealing mechanism and the mixing mechanism are integrated on the stirring mechanism, so that the efficiency and the sealing reliability in the contrast agent stirring process are remarkably improved. Wherein the mixing mechanism is fixedly connected to the outer wall of the stirring shaft and can drive the stirring plate to efficiently stir in multiple directions when the stirring shaft rotates, so that a contrast agent and gas can be fully mixed to generate mixed liquid with uniform and stable microbubbles, and the imaging quality and diagnosis accuracy of heart color ultrasound acoustic contrast examination are improved.

The invention relates to the technical field of control of intelligent implanted medical instruments, and discloses an aneurysm neck sealing system and a control method. Digital subtraction angiography is adopted to measure the neck diameter in multiple directions, an average value is calculated, the target neck sealing radius is set by combining the size of an embolism device, and it is ensured that instrument type selection is scientific and reasonable. The triggering temperature and recovery kinetics of the shape memory polymer are determined through a constant-temperature experiment, an actual expansion radius model is established, and quantitative control over the heating process is ensured. A heat balance model is established by using the heat capacity and cooling curve of the embolism device, and temperature rise and heating power expressions are deduced, so that fine regulation and control of temperature and power are realized. And natural cooling is performed after heating to a set terminal point, the plugging effect is evaluated in real time through iconography measurement, and compensation heating or model replacement is performed according to actual differences to ensure the plugging effect.

The invention provides an automatic counting method and system for ultrasonic microbubbles in right heart acoustic radiography. The method comprises the following steps: acquiring a cardiac radiography image of a patient through high-resolution ultrasonic equipment; extracting a region of interest of the cardiac angiography image based on the cardiac vascular structure, and performing image registration operation on the cardiac angiography image by taking the region of interest as a reference point to obtain a registered image; carrying out pixel-by-pixel addition on two frames of pulse images with opposite phases in the registered image to obtain an enhanced image; determining the high-echo bright spots in the enhanced image as suspected microbubbles, and performing denoising processing according to the feature similarity to obtain real microbubbles; judging pathological conditions according to whether real microbubbles exist in the left atrium or not; if the real microbubbles exist in the left atrium, grading the abnormal blood flow according to the change data of the microbubbles in the left atrium and the right atrium. According to the method, through high-precision image registration, multi-modal feature analysis and dynamic parameter fusion technologies, the microbubble detection accuracy is improved, and quantitative grading of pathological conditions is achieved.

The invention provides a multi-mode ultrasonic monitoring method for degradation of a PFO degradable plugging device, and relates to the technical field of cardiovascular ultrasonic medical treatment. The multi-mode ultrasonic monitoring method for degradation of the PFO degradable occluder aims to overcome the technical defects that in the prior art, a single ultrasonic mode cannot achieve degradation progress quantification of the occluder, precise identification of residual shunt and evaluation of the integration degree of surrounding myocardial tissue at the same time. According to the method, three modalities of real-time three-dimensional transthoracic ultrasound (RT-3D TTE), ultrasonic contrast (CEUS) and shear wave elastography (SWE) are cooperatively applied, the form, hemodynamics and tissue elasticity data of the occluder are collected in stages, non-invasive, dynamic and accurate monitoring of the whole degradation process of the occluder is achieved in combination with preset quantitative indexes, and a reliable basis is provided for clinically adjusting a treatment scheme.

A method, system, device and storage medium for measuring and classifying CT-FFR, dividing lesions into different types according to coronary artery computed tomography angiography (CCTA) images, determining lesion lengths at lesion positions according to different lesion types, and determining the lesion lengths at the lesion positions according to different lesion types. Then, the measurement range of computed tomography fractional flow reserve is determined according to the focus lengths of different lesion types, a statistical matrix is established to calculate the numerical values of all computed tomography fractional flow reserve CT-FFR in the measurement range, and finally, hemodynamic classification is conducted on calculation results. According to the CT-FFR evaluation method, the accuracy and the stability of CT-FFR evaluation are enhanced by carrying out pathological change specificity classification on the pathological change in the haemodynamics sense, interference is reduced, and a more reliable solution is provided for clinicians and patients.

The invention belongs to the technical field of medical instruments. In order to solve the problem that an existing device is tedious in operation, the multifunctional automatic injection system is designed and comprises an injector, an automatic injection device and an auxiliary Y valve, and the auxiliary Y valve is connected with a catheter, a guide wire and the automatic injection device. Therefore, the automatic injection device can inject the contrast agent, the medicine or the embolic agent in the injector, the contrast or treatment efficiency is improved, meanwhile, the guide wire can be rapidly fixed, the guide wire does not need to be completely withdrawn out of the catheter, the surgical operation difficulty is reduced, and the surgical time is shortened.

Disclosed is a medical imaging system, including a processor circuit configured for communication with an x-ray imaging device movable relative to a patient and an intravascular catheter or guidewire sized and shaped for positioning within a blood vessel of the patient, wherein the processor circuit is configured to receive a first angiographic image of a first length of the vessel and a second angiographic image of a second length of the vessel, wherein the first image is obtained at a first position and the second angiographic image is obtained at a second position. The processor is further configured to generate a roadmap image of a combined length of the blood vessel by combining the first image and the second image, and to receive intravascular data associated with the blood vessel, and to co-register the intravascular data to corresponding locations in the roadmap image; and output the roadmap image and a graphical representation of the intravascular data at the corresponding locations in the roadmap image.

A computer-implemented method of processing repeat B-scans of an imaged region of a body part, the imaged region including an anatomical feature in a first subregion and vasculature of interest in a second subregion of the imaged region, to generate cropped B-scans for use in generating OCT angiography data which provides a representation of the vasculature of interest, the method comprising processing each B-scan of the repeat B-scans by: selecting a subset of the data elements of the B-scan such that the selected data elements are distributed along a representation of the anatomical feature in the B-scan; using the selected data elements to define a respective subregion of interest in the B-scan, which includes OCT data acquired from the second subregion containing the vasculature of interest; and cropping the B-scan to leave the subregion of interest in the B-scan.

This application relates to the field of medical devices and discloses a thrombectomy device, including a control handle, a catheter, and a thrombectomy assembly. The proximal end of the catheter is connected to the control handle, and the catheter has a suction chamber. The thrombectomy assembly includes a thrombectomy structure, a driven component, and a rotating component. The thrombectomy structure passes through the suction chamber, with its distal end located on the distal side of the suction chamber. The proximal end of the thrombectomy structure is connected to the driven component, which is located within the control handle and detachably connected to the rotating component. This thrombectomy device can effectively remove thrombi and reduces the time required for instrument replacement and re-angiography, improving surgical efficiency and reducing surgical risks.

The invention discloses a radiotherapy activated self-assembled polypeptide magnetic resonance contrast agent as well as a preparation method and application thereof. The magnetic resonance contrast agent is prepared by sequentially connecting a tumor targeting peptide module, a radiotherapy activation peptide module, an assembly peptide module and a contrast molecule fragment module through solid-phase synthesis. The magnetic resonance contrast agent can perform targeted recognition in tumor-bearing mice and penetrate tumor cells, and can perform self-assembly under the action of apoptosis protease generated by induction after radiotherapy to form nanofibers, so that the intracellular residence time is prolonged, T1 weighted magnetic resonance imaging signals are enhanced, and the imaging contrast ratio of tumor parts after radiotherapy is further improved. The magnetic resonance contrast agent provides higher accuracy and safety for tumor radiotherapy guided by magnetic resonance imaging, can be used as a novel molecular probe for monitoring the tumor radiotherapy process and effect in real time, and has a good clinical application prospect.

The invention belongs to the technical field of medical ultrasonic diagnosis auxiliary equipment, and discloses an electric right heart acoustic radiography foaming device which comprises a device body, the device body comprises a base, a mounting plate is fixedly arranged on the rear side of the base, a driving assembly is arranged on the front side of the mounting plate, and the driving assembly comprises fixing frames fixed to the upper side and the right side of the mounting plate; a stepping motor is fixedly arranged at the top of the fixing frame, a ball screw is fixedly arranged at the tail end of a main shaft of the stepping motor, a sliding block is spirally arranged on the outer side of the ball screw in a sleeving mode, and a connecting rod is fixedly arranged at the bottom of the sliding block, so that accurate controllability of power transmission and visual adjustment of parameters in the contrast agent injection process are achieved; specifically, key parameters such as injection speed and dosage can be accurately set through the operation panel, a traditional manual injection mode is replaced, and the stability of the foaming effect of the contrast agent is guaranteed.

The application relates to the field of medical image assisted ablation technology, and provides a thyroid nodule ablation control system based on ultrasound contrast parameters. The system comprises an ultrasound data acquisition module, a contrast parameter analysis module, a blood supply identification module, an ablation strategy generation module, an ablation execution module, a feedback evaluation module, a closed-loop control module and an energy optimization module. By acquiring an ultrasound contrast image of target tissue, perfusion time, perfusion intensity and perfusion sequence parameters are extracted, blood supply arteries or blood supply areas are identified, and a phased ablation strategy is generated, the blood supply area is preferentially ablated, and then main ablation is carried out on the target tissue; at the same time, residual active areas are detected based on contrast feedback, and supplementary ablation is carried out through a closed-loop control mechanism; and ablation parameters are dynamically optimized in combination with a unit volume energy model. The system can improve ablation integrity, reduce the heat sink effect and the risk of intraoperative bleeding, reduce the recurrence rate, and improve energy utilization efficiency.

The invention discloses a system and a method for detecting branch blood flow disorder in coronary artery bifurcation lesion interventional therapy. The system comprises a physiological signal acquisition unit, an angiography unit, a coronary intravascular ultrasound unit, a data processing and control unit and a display unit. The method is realized through the following steps: calculating baseline functional indexes and extracting baseline morphological parameters based on radiography and vascular ultrasound images before an operation; the method comprises the following steps: synchronously acquiring real-time radiography and ultrasonic images before and after key steps in an operation, and calculating real-time functional indexes and real-time morphological parameters according to the real-time radiography and ultrasonic images; fusing the real-time data with the baseline data, and calculating a comprehensive damage index; and according to whether the index exceeds a preset threshold, generating a graded early warning signal in real time. According to the method, image data which can be conventionally obtained in an operation is utilized, real-time fusion and quantitative evaluation of function and form information are achieved, objective decision support in the operation is provided for an operator, intervention opportunities can be accurately mastered, and the operation safety and curative effect are improved.

The invention relates to CBCT integrated equipment carrying an injection pump and an application method and application device of the CBCT integrated equipment. According to the method, a bed body, a ray generating device, a detector, an injection pump and an infusion tube are included, and a tube groove is formed in a non-imaging area of a bed board so as to fix the infusion tube, avoid the winding phenomenon of the infusion tube, guarantee normal infusion and further reduce image artifacts; the mechanical driving device can drive the pump body to rotate under the condition that medicine needs to be injected, so that a needle head part of the pump body points to the position lower than the horizontal plane, and outflow of the medicine to be injected is guaranteed; the mechanical driving device can drive the pump body to rotate under the condition that medicine does not need to be injected, so that the needle head part of the pump body points to the position higher than the horizontal plane, and the medicine to be injected is prevented from flowing out of the pump body. Furthermore, the CBCT integrated equipment carrying the injection pump can directly carry out image exposure after injection so as to timely and accurately capture three-stage contrast images and obtain high-quality images.

The present invention belongs to the fields of acoustics, medicine, and metamaterials, and discloses an acoustic reflective film for ultrasonic imaging of internal organs or tissues. The film comprises a first material and a second material having different sound velocities. The first material is flexible, and the second material is distributed within the first material in a periodic arrangement. The periodic arrangement of the second material enhances ultrasonic reflection based on the multiple scattering effect, thereby providing an imaging effect. This invention breaks away from the inherent concept of traditional oral contrast agents by utilizing two materials with different sound velocities and a periodic structure to produce an acoustic reflective film. The film can be attached to the outer wall of an internal organ or tissue through surgical implantation or other means, and can be used for long-term ultrasonic imaging of internal organs or tissues. This effectively addresses the problems of existing ultrasonic imaging equipment being unable to clearly image internal organs and tissues, and existing oral liquid contrast agents being unable to remain in the body for a long time and having limited available locations.

The invention discloses a heart multi-modal image feature extraction method and device, equipment, a medium and a product, and relates to the technical field of medical image processing, and the method comprises the steps: obtaining multi-modal heart image data, patient information and case information in a multi-center imaging department and an ultrasound department; labeling the multi-modal heart image data, and constructing a multi-modal iconography feature database; establishing a database platform comprising a server storage control terminal and a data screening and uploading terminal; opening a communication link after verifying the identity of the requester; training is carried out based on the marked multi-mode heart data and a deep learning algorithm so as to obtain heart structure features of heart ultrasound and nuclear magnetic images through coronary angiography (CCTA) image data; finally, the system is deployed and applied clinically. According to the method, the heart structure features of the other two modal images are predicted based on the single-modal CCTA image data, the diagnosis range based on the CCTA image data is expanded, the medical overhead is saved, and the diagnosis and treatment efficiency and accuracy are improved.

The invention discloses a PCI (Peripheral Component Interconnect) drug balloon postoperative effect prediction method, device and equipment based on a multi-modal image and a storage medium. The method comprises the following steps: firstly, collecting historical preoperative digital subtraction angiography (DSA) images of a plurality of patients, corresponding intracavitary image data and postoperative effect label data; further extracting vascular morphological parameters of a target lesion segment from the DSA image, extracting plaque microstructure features from the intracavity image, combining the vascular morphological parameters, the plaque microstructure features, clinical data of a patient and parameters of a drug balloon instrument into an input feature vector, and taking postoperative effect label data as a regression target; training an ensemble learning regression model; and finally, for a to-be-evaluated patient, acquiring a preoperative DSA image and an intracavity image, extracting features in the same way, inputting the features into the trained model, and outputting an immediate and / or long-term vasodilation gain prediction value of the patient after the PCI drug balloon operation so as to improve objectivity and reliability of a DCB preoperative decision.

The application provides a method for measuring an ultrasound coronary artery flow reserve fraction, and relates to the technical field of ultrasound imaging.The method for measuring the ultrasound coronary artery flow reserve fraction provided by the application estimates the blood pressure distribution of a coronary artery stenosis region through a fluid mechanics model based on ultrasound contrast video, and then obtains a flow reserve fraction FFRUS and a reliability index sigma.Based on the ultrasound contrast video data V0 collected, the coronary artery ultrasound contrast imaging video data V1 is determined by using a sliding window double filtering strategy;based on V1, the stenosis region of the coronary artery is determined as a target region Omega;based on V1, the blood flow velocity field V2 of the target region Omega is determined;based on V2 and the proximal blood pressure value Pa of the target region Omega, the blood pressure distribution V3 of the target region Omega is determined;based on V3, the flow reserve fraction FFRUS and the reliability index sigma are calculated by using the flow reserve fraction definition.

A polyp in-situ snare measuring device used under an endoscope mainly comprises a snare ruler, a push-pull rod, a sheathing canal and a control handle. The front end of the push-pull rod can freely deflect along with the head end of the endoscope, so that the snare ruler can directly cover the surface of the polyp for in-situ measurement, and the polyp measurement precision is guaranteed. According to the utility model, while the polyp size is measured, various diagnosis and treatment functions such as lavage, liquid medicine spraying and radiography can be implemented.

The invention provides an acoustic-magnetic dual-mode diagnosis and treatment agent as well as a preparation method and application thereof, and belongs to the technical field of preparation of tumor diagnosis and treatment agents. The acoustic-magnetic dual-mode diagnosis and treatment agent is surface-modified magnetic nanoparticles which contain nano balloon genes and are subjected to Escherichia coli induced expression; the nucleotide sequence of the nano-balloon gene is a sequence shown as NCBI: KC601845.1, escherichia coli in the acoustic-magnetic dual-mode diagnosis and treatment agent as a diagnosis and treatment agent carrier has an active targeting property on a tumor hypoxic region, and bacteria contain a nano-balloon and have an acoustic response characteristic; the escherichia coli surface modified magnetic nanoparticles have a magnetic response characteristic. In acoustic-magnetic dual-mode imaging, firstly, on a real-time ultrasonic contrast monitoring image, a nano air bag expressed in bacteria can generate an enhanced tumor ultrasonic echo signal; secondly, under the action of an external changing magnetic field, the magnetic nanoparticles on the surfaces of the bacteria can generate an enhanced tumor magnetic vibration imaging effect, so that more efficient tumor diagnosis and / or treatment can be realized.

The application discloses a multi-modal imaging system and method based on an optical low-coherence interference field. The application can realize efficient interference signal collection and imaging under various OCT imaging modes in one set of system and imaging mechanism, and can realize mapping of imaging coordinate systems of various modes through linear transformation by combining the OCT axial imaging characteristics and the scanning setting under the same galvanometer mirror, so that the fusion display of multi-dimensional information in tissues can be completed without complex offline registration. The application can provide wide-area positioning imaging in a large depth range, structure imaging with high resolution and high signal-to-noise ratio, blood flow velocity detection and angiography with a large dynamic range, fast elastic imaging, and can also provide a real-time structure imaging mode with a large lateral field of view, so that a user can observe and operate according to the above information in a dynamic scene. The application has great significance for biomedical application scenes with multi-tissue information requirements.

The invention discloses a disposable sclerosis injection device special for hemangioma or cyst, and belongs to the technical field of medical instruments. A first connector of the first three-way pipe is connected with an extension pipe of the puncture needle or connected with the puncture needle through a first extension pipe; the first injector is connected with a second connector of the first three-way pipe through a second extension pipe; a first end of the third extension pipe is connected with a third interface of the first three-way pipe; the second end of the third extension tube is connected with the second injector; or, the second end of the third extension tube is connected with the first connector of the second three-way tube, the second connector of the second three-way tube is connected with the third injector, and the third connector of the second three-way tube is connected with the fourth injector. According to the invention, different vein puncture needles are flexibly assembled into the sclerosis injection device special for hemangioma or cyst and suitable for different application scenes, so that cyst suction, radiography and free sclerosing agent injection can be realized.

The utility model discloses a kind of cerebral angiography and treatment of radial artery approach combined catheter, belong to medical instrument technical field, the catheter includes outer sleeve and inner core pipe;The outer sleeve includes outer tube body, the inner core pipe is movably threaded in the lumen of outer sleeve, the inner core pipe includes connected proximal end tube body and distal end tube body, the distal end tube body is pre-shaped structure, the pre-shaped structure of the distal end tube body is formed by multiple arc transition sections connected head to tail, the multiple arc transition sections constitute hook shape and the head end of distal end tube body extends to the outside of hook, the length of the pre-shaped structure of the distal end tube body is 12.5-18.5cm.The utility model sets outer sleeve and inner core pipe as independent catheter, without nesting and unscrewing when operating, reduce blood vessel injury risk;Inner core pipe has stronger superselective ability, can be directly used for the superselective angiography of target blood vessel.