89 results about "Fluoroscopy" patented technology

A system for computer assisted navigation during surgery includes a computer platform that operates to register a target surgical area of a patient. In certain cases, a process includes: obtaining a pre-op CT image of a pelvic region of a patient and intra-operatively obtaining a point cloud data about the pelvic region with a navigated instrument, generating a 3D bone model which excludes non-targeted area such as a femur, and then merging the 3D bone model to the point cloud to register the target surgical area.

Photoacoustic medical-device navigation systems and methods provide alternatives to those incorporating fluoroscopy for medical-device navigation in patient bodies. A medical-device navigation system can include an optical-fiber stylet, ultrasound transducers, and a console. The stylet can transmit light to an instant location of a distal tip of an elongate medical device in a patient's body and, thereby, irradiate endogenous chromophores to generate ultrasound-frequency photoacoustic pressure waves therefrom. The ultrasound transducers can detect ultrasound signals corresponding to the photoacoustic pressure waves. The console can instantiate medical-device navigation processes for navigating the elongate medical device via the stylet as the elongate medical device is advanced to the target location in the patient's body. The medical-device navigation processes can include acquiring ultrasound-signal data from the ultrasound transducers, reconstructing images from the ultrasound-signal data, and displaying reconstructed images on a display for navigating the elongate medical device to the target location in the patient's body.

The present invention enables more efficient positioning control of a bed on which a patient is placed. A bed position control device that controls a position of a bed on which a patient is placed includes: an image acquisition unit that acquires a fluoroscopic X-ray image obtained by imaging the patient by X-ray fluoroscopy; a pseudo fluoroscopic X-ray image acquisition unit that acquires a pseudo fluoroscopic X-ray image created from a three-dimensional image of the patient; a second region-of-interest creation unit that, from a first region-of-interest set in the pseudo fluoroscopic X-ray image so as to include a region of a target structure, creates a second region-of-interest including the region of the target structure in accordance with a positional deviation of the patient; and an image matching unit that matches an image in the second region-of-interest in the pseudo fluoroscopic X-ray image with an image in the second region-of-interest in the fluoroscopic X-ray image, determines a position of the bed necessary for aligning the position of the patient in the fluoroscopic X-ray image, and moves the bed to the determined position of the bed.

This invention provides a detachable, interchangeable imaging diagnostic device that allows for the use of various sizes of scopes, enabling easy image diagnosis of various affected areas. [Solution] The interchangeable imaging diagnostic device comprises a scope module including a fluoroscopy tube 110, a scope body 120 surrounding the rear of the fluoroscopy tube, an LED 130 providing light into the fluoroscopy tube, a heat sink 140, and an LED connection jack 150 protruding from the rear surface; a main body including a focus lens 210 for observing the condition of the affected area through the fluoroscopy tube, an adjustment lever 220 for magnifying or reducing the condition of the affected area as seen by the focus lens, a camera 230 for saving images of the body cavity, and an imaging trigger 240 for capturing images of the captured images. The main body has an LED power jack into which the LED connection jack is inserted and a coupling groove into which the rear end of the fluoroscopy tube is inserted, and is characterized by a structure that allows for the selection of scope modules with different fluoroscopy tube sizes and their detachable connection to the main body.

The invention discloses a radiation protection device capable of moving along with a bulb tube under perspective of a C-shaped arm, which belongs to the field of medical instruments and comprises a bed body, a C-shaped arm frame, a bulb tube part and an image acquisition part, and the bulb tube part and the image acquisition part are respectively fixed at two ends of the C-shaped arm frame; the anti-radiation bed further comprises an anti-radiation cover body, one end of the anti-radiation cover body is fixedly connected to the outer portion of the bulb tube part in a sleeving mode, and the other end of the anti-radiation cover body is fixedly connected to the lower end of the bed body. The anti-radiation bed is provided with the anti-radiation cover body, one end of the anti-radiation cover body is mounted at the bottom of the bed body, and the other end of the anti-radiation cover body is mounted outside the bulb tube, so that a flexible connection channel is formed; no matter how the bulb tube swings back and forth or left and right, the radiation-proof cover body can stretch and deform along with the bulb tube, the radiation-proof cover body is like a protective shield which always follows a hand, and most of primary scattered rays are limited in the radiation-proof cover body when being just generated, so that the environmental radiation background value in the operating room is remarkably reduced, and the radiation-proof effect of the operating room is improved. Particularly, the lower limbs of a doctor standing close to the operating bed are protected from being hit by lateral scattering.

Described herein are systems, methods, and apparatuses associated with using deep learning techniques to denoise medical images, such as fluoroscopy images. A first artificial neural network (ANN) is trained to denoise input medical images according to a provided target noise level. The training of the first ANN is performed by pairing noisy input images with target denoised images that include different noise levels. During different training iterations, these target denoised images are generated using a second ANN as an intermediate output of the second ANN. As such, the first ANN can learn to perform the denoising task in an unsupervised manner without requiring noise-free training images as a gold standard.

The application relates to the technical field of image processing, and discloses an interventional navigation method and system based on multi-modal image fusion. The method comprises the following steps: CT angiography data is segmented to form a three-dimensional vascular skeleton model, MRI perfusion data is calculated to generate a vascular flow field, and a vascular geometric constraint matrix is constructed; the constraint matrix and instrument position information are diffused and reconstructed, and an instrument motion prediction trajectory is output; an X-ray fluoroscopy image instrument tip posture is estimated, and instrument-vascular spatial correlation features are formed; safe navigation constraint parameters are calculated and generated through a distance field; and a path planning algorithm is used to generate real-time navigation instructions containing a pushing distance and a rotation angle. The application solves the technical problems of insufficient multi-modal image data fusion, inaccurate instrument motion prediction and imperfect safety constraint mechanism in a traditional interventional navigation system, and improves the precision, safety and real-time performance of interventional surgery navigation.

To provide a medical stent and a stent delivery device capable of easily grasping the position of a distal end under radioscopy.SOLUTION: A medical stent includes a main body having a tubular member and a reinforcing member wound in a spiral shape and embedded between an inner peripheral surface and an outer peripheral surface of the tubular member, a first locking member having a first fixed end fixed to a distal end side of the main body and a first free end located outside the tubular member and extending from the first fixed end to the first free end, a second fixed end fixed to a proximal end side of the main body, and a second free end located outside the tubular member. A second locking member extending from a second fixed end to a second free end, The main body has a first region, a second region, and a third region in which winding pitches of the reinforcing material are different from each other, the first region is a region located between the distal end of the main body and the first fixed end, the second region is a region in which the reinforcing material is wound at a winding pitch larger than that of the first region, and the third region is a region in which the reinforcing material is wound at a winding pitch larger than that of the second region.SELECTED DRAWING: Figure 3

The present application relates to a TAVR teaching model based on blood flow simulation and multi-modal image fusion and use method. The model comprises a simulated thoracic and abdominal cavity with a built-in heart wave beat simulation part that drives fluid to generate pulsatile blood flow, a simulated thoracic and abdominal body with pre-set vascular access, a bionic heart assembly with structures such as a ventricular cavity, a pathological valve module that can be detachably fitted to the aortic valve ring and contains a pressure sensor array and simulated calcification, a coronary circulation monitoring module that monitors the perfusion state of the coronary artery opening, a virtual fluoroscopy positioning module that generates real-time fluoroscopy images, and a central control console that electrically cooperates with each module. The scheme simulates the tactile sensation of calcification through the pathological valve module, the heart wave beat simulation part reproduces the physiological pressure difference with a closed loop blood flow, realizes image navigation training with non-radiation virtual fluoroscopy, integrates real-time simulation of complications with coronary monitoring and annulus pressure sensing, and solves the problems of existing models such as distorted hand feeling, inaccurate dynamics, dependence on radiation, and lack of complication training.

The present invention provides a radiation shield and radiation protective eyewear that can reduce the amount of X-rays absorbed by the lens of the eye of the operator performing the X-ray fluoroscopy examination during the examination process. [Solution] The radiation shield 100 of the present invention is a radiation shield to be attached to eyeglasses, and comprises a flexible sheet 101 containing a material that absorbs radiation, a shape-retaining member 102 that holds the sheet 101 in a predetermined three-dimensional shape, and a fixing means 103 that allows the sheet 101 to be attached and fixed to one temple of the eyeglasses.

The hybrid stimulation system is an electrical stimulation system serves to delivered an electrical stimulation impulse to the heart (human or animal heart) , using a combination of internal (intravascular) and external (body surface) electrodes, the hybrid electrical stimulation system can be used for pacing of the heart during slow heart beat (bradycardia), or shocking the heart during fast heart beat (Tachycardia) , or to terminate fast abnormal heart beat (tachy-arrhythmia) by means of override pacing (Anti-tachycardia pacing). This hybrid system can be used and introduced into the body without the need for imaging guidance such as fluoroscopy or echocardiography to insert the internal component, and does not require direct contact between the internal pacing wire and the myocardium (internal heart surface).

The invention provides a precise navigation method and system for large trochanter bone scale retardation. The method comprises the following steps: acquiring a bone three-dimensional model of a large trochanter and planning information of a retardation screw; carrying out registration on an entity trochanter and the skeleton three-dimensional model in an operation, and mapping planning information of a blocking screw; and tracking and displaying the poses of the screw placement tool and the solid large trochanter in real time so as to navigate the screw placement action of the retardation screw. In the application, accurate screw placement of epiphyseal block is realized by planning the screw placement scheme of epiphyseal block, tracking the screw placement tool and the distal end of the solid femur in real time, so that accurate screw placement is realized without repeated fluoroscopy, and radiation exposure injury is avoided.

A launching catheter for targeting a second vessel from a first vessel includes a catheter including a proximal portion and a distal portion including a needle aperture and a flat rectangular radiopaque marker. The flat rectangular radiopaque marker disappears under fluoroscopy upon rotation to provide information about rotational alignment of the launching catheter. The launching catheter includes a needle configured to extend through the needle aperture. A method of aligning the catheter includes rotating the catheter in a first blood vessel until the marker has a thickness (e.g., minimal thickness) under fluoroscopy. The thickness indicates rotational alignment of the catheter.

The invention discloses a medical X-ray perspective grayscale adaptive control method based on histogram features, and relates to the technical field of medical X-ray imaging and medical image processing, and the method comprises the steps: extracting image histogram features, and adjusting a high-voltage generator and parameters in combination with an ABC curve to maintain the image grayscale stable; the method further comprises the following steps: constructing a multi-dimensional correction-real-time calibration contrast agent photon attenuation-histogram feature nonlinear mapping model, performing synchronous coupling control on real-time photon counting-histogram features, and completing parameter self-calibration by using a contrast agent attenuation critical threshold effect; according to the invention, through a nonlinear mapping model, an FPGA parallel architecture, physiological signal correction and one-frame pre-injection calibration, a contrast agent gray abrupt change time sequence difference is eliminated, overexposure and underexposure are avoided, and high-frequency clinical real-time accurate requirements are met; meanwhile, contrast agent concentration quantification and flow evaluation are achieved, trinity diagnosis and treatment assistance is formed, the missed diagnosis rate is reduced, and the clinical value of medical X-ray fluoroscopy equipment is remarkably improved.

A medical stent whose distal end position can be easily checked under X-ray fluoroscopy, and a stent delivery device are provided. The medical stent includes a main body including a tubular member and a reinforcing material that is wound in a spiral shape and embedded between an inner circumferential surface and an outer circumferential surface of the tubular member, a first locking member that includes a first fixed end fixed to a distal end side of the main body and a first free end located on an outer side from the tubular member, and extends from the first fixed end to the first free end, and a second locking member that includes a second fixed end fixed to a proximal end side of the main body and a second free end located on the outer side from the tubular member, and extends from the second fixed end to the second free end, wherein the main body includes a first region, a second region, and a third region that have different winding pitches of the reinforcing material different from one another, the first region is a region located between the distal end of the main body and the first fixed end, the second region is a region in which the reinforcing material is wound with a greater winding pitch than the first region, and the third region is a region in which the reinforcing material is wound with a greater winding pitch than the second region.

The invention provides a medical stent and a stent delivery device, wherein the position of the front end can be easily grasped under X-ray fluoroscopy. A medical stent is provided with: a main body having a tubular member and a reinforcing material wound in a spiral shape and embedded between the inner peripheral surface and the outer peripheral surface of the tubular member; a first locking member having a first fixed end fixed to the front end side of the main body and a first free end located outside the tubular member, the first locking member extending from the former to the latter; and a second locking member having a second fixed end fixed to the base end side of the main body and a second free end located on the outside of the tubular member, the main body having a first region, a second region, and a third region in which the winding pitches of the reinforcement are different from each other, and the second locking member having a second fixed end fixed to the base end side of the main body and a second free end located on the outside of the tubular member. The first region is a region between the front end of the main body and the first fixed end, the second region is a region in which the reinforcement is wound at a winding pitch larger than that of the first region, and the third region is a region in which the reinforcement is wound at a winding pitch larger than that of the second region.

The surgical operating table X-ray detector mounting rack comprises a loading part which is used for detachably mounting a detector body and horizontally limiting the detector body under an operating table body; the connecting piece comprises a positioning part and an extending part, the extending part is used for connecting the loading piece and the positioning part and used for horizontally limiting the loading piece to the position under the operation table body, the positioning part is connected to a side rail of the operation table body in a clamped mode, and the positioning part is connected to the side rail of the operation table body in a clamped mode. The positioning part is used for limiting the movement of the extension part in the circumferential direction of the side rail; through cooperation of the loading piece and the connecting piece, the detector can be flexibly and stably fixed to the position below the operation operating table, the position can be flexibly fixed according to the use requirement, space is better liberated, perspective can be conducted smoothly, inconvenience caused by frequent moving of a patient and replacement of the operation operating table is effectively avoided, and the practicability is high. And the working efficiency of the orthopedic surgery is effectively improved.

Provided is an X-ray apparatus capable of performing X-ray fluoroscopy or X-ray photography in appropriate conditions more reliably and quickly. The X-ray apparatus includes a condition storage unit that stores image acquisition conditions corresponding to position information of an object in association with the position information; a learning model storage unit that stores a learning model that infers a position of a human body appearing in an image by machine learning and outputs the position; an image analysis unit that infers a position of an object in an input image by inputting the input image to the learning model as an input image and outputs the position; a condition readout unit that reads out image acquisition conditions associated with position information by selecting the position of the object that has been output as the position information; and a main control unit that performs control of at least either of an X-ray tube and an image processing unit in accordance with the read-out image acquisition conditions.

The invention relates to the technical field of orthopedic surgery navigation, and discloses an orthopedic surgery navigation system based on X-ray fluoroscopy. Comprising a two-dimensional arc-shaped moving mechanism and a three-dimensional moving mechanism, the two-dimensional arc-shaped moving mechanism is installed on the three-dimensional moving mechanism, the two-dimensional arc-shaped moving mechanism comprises a base assembly, a connecting arm A, a connecting arm B, a connecting arm C, a connecting arm D, a two-dimensional arc-shaped moving assembly and a connecting sleeve, and the connecting arm A is installed on the base assembly. Through the two-dimensional arc-shaped moving mechanism and the three-dimensional moving mechanism, the needle entering point and the needle entering direction can be accurately adjusted according to calculation of images obtained after perspective in the operation, the perspective frequency and operation wounds are reduced, accurate positioning adjustment and accurate directional adjustment of the needle entering point can be achieved, complex registration and setting operation are not needed in the operation, and the operation efficiency is improved. Only two times of perspective operation are needed, and tedious use and a huge system of an existing surgical navigation system are avoided.

A perspective accurate angle control body position fixing device in an ankle joint operation relates to the technical field of medical instruments and comprises a supporting panel, mounting grooves are formed in the opposite ends of the supporting panel, and an operation side body position fixing assembly and an uninjured side body position fixing assembly are arranged in the two mounting grooves respectively; the healthy side body position fixing assembly comprises a fixed U-shaped frame detachably connected with the supporting panel, a movable U-shaped plate and a sliding U-shaped plate are horizontally arranged in the fixed U-shaped frame in a sliding mode, a lifting frame is vertically arranged in the movable U-shaped plate in a lifting mode, self-adaptive plates are rotationally arranged at the positions, located on the two sides, of the top of the lifting frame, and a follow-up plate is rotationally arranged at the top of the sliding U-shaped plate; when the lifting frame moves upwards, the knee joints on the uninjured side bend, the self-adaptive plate and the follow-up plate rotate downwards, and the movable U-shaped plate and the sliding U-shaped plate slide towards the buttocks. The problem that the standard body position is difficult to obtain and maintain during ankle joint fluoroscopy in an existing operation is solved.

The invention provides an X-ray imaging apparatus and an image processing apparatus. The X-ray imaging apparatus displays an X-ray image in which a region of interest to a knife-holding medical worker is converted to an emphasized pixel value that is easily visible to the knife-holding medical worker. A region of interest included in an X-ray image is extracted in perspective, and a pixel value conversion parameter for converting pixel values so as to emphasize the distribution of the pixel values of pixels in the region of interest is calculated. Using the calculated pixel value conversion parameter, the pixel value of the X-ray image generated after the point in time at which the pixel value conversion parameter is calculated is converted, and the converted image is displayed.

The invention provides an X-ray fluoroscopic imaging apparatus. Provided is an X-ray fluoroscopic imaging device in which a physician can rotate a table without worrying about interference with the table. When the operation unit receives an instruction to rotate the table (109) in a direction in which the head of the subject (10) is heightened relative to the legs, the table is lifted by the lifting mechanism in accordance with the rotation angle of the table while the table is rotated by the rotation mechanism. The table (109) is mounted in a lying position with the legs of the subject (10) facing the one end side and the head facing the other end side, while maintaining the distance between the one end of the table and the ground.

A method and system for real‑time fluoroscopy guidance in robotic interventions. A tomosynthesis sweep of 2D fluoroscopic projections is used to reconstruct a 3D image of a target. The 3D target is projected as an overlay into live fluoroscopy frames. A best‑matching tomosynthesis projection is selected and a reference feature common to the reference projection and live frames is localized. Displacement of the reference feature is computed and compared to thresholds to determine whether the subject's physical state has changed and whether the overlay remains correctly positioned. The system provides qualitative indicators, recommends retake of tomosynthesis when misalignment exceeds tolerance, and can pause or limit robotic tool advancement until alignment is restored. Adaptive thresholding using a trained model is supported.

This invention discloses a pressure-distance measurement system and method for venous sinus stenosis, relating to the field of venous sinus stenosis pressure measurement technology. The system includes a localizable radiopaque guidewire, a pressure-measuring microcatheter, a projection imaging adjustment unit, a retraction speed adjustment unit, and a pressure-distance measurement unit. The localizable radiopaque guidewire is delivered and fixed to the venous sinus segment to be measured under X-ray fluoroscopy. The pressure-measuring microcatheter is delivered along the guidewire to collect pressure signals. The projection imaging adjustment unit is used to dynamically correct the projection angle to obtain accurate target images. The retraction speed adjustment unit dynamically adjusts the sampling density in areas of stenosis and optimizes the retraction speed in conjunction with physiological movement amplitude. The pressure-distance measurement unit controls the catheter to move at a uniform speed, synchronously collecting pressure signals and axial movement distance in real time, forming pressure-distance relationship data and plotting curves, providing continuous and accurate data for the functional assessment of venous sinus stenosis.

The application discloses a femoral head lesion auxiliary positioning guider and a high-precision positioning method, and relates to the technical field of medical treatment, which comprises a femoral head lesion guider, a guider positioner and a needle depth positioner, the guider positioner comprises a fixing set, a holding handle and an iliac bone positioning plate, the fixing set is arranged at one end of the holding handle, the iliac bone positioning plate is arranged at the other end of the holding handle, a precut anterior superior iliac spine clamping groove is arranged on the iliac bone positioning plate, and a channel positioning cavity is arranged in the middle of the fixing set. The femoral head lesion auxiliary positioning guider of the application is customized, the precision and effect of traditional positioning of femoral head lesions can be effectively improved, the bone shape and lesion conditions of different patients can be better adapted to, the success rate of surgery and the postoperative recovery effect of patients are improved, the number of fluoroscopy in surgery is greatly reduced, the surgery time is shortened, the surgery risk is reduced, and the surgery success rate is improved.

The invention relates to the technical field of dilatation catheters, in particular to a perfusion balloon dilatation catheter system which comprises a perfusion balloon dilatation catheter assembly which comprises a catheter seat, a destressing tube, an outer tube, a balloon and a head end tube which are sequentially connected. The catheter front-end blood vessel image acquisition module is used for determining whether the balloon catheter is in a blood vessel true cavity or not; the supporting wire front end image acquisition module is used for acquiring a supporting wire form image of the front end of the supporting wire under X-ray perspective and a corresponding blood vessel form image; the supporting wire touch obtaining module is used for obtaining stress changes in the supporting wire pushing process, the supporting wire form image and the corresponding blood vessel form image so as to determine whether the supporting force of the supporting wire is qualified or not, and the posture of the supporting wire is adjusted in the state that the supporting force of the supporting wire is insufficient. The perfusion balloon dilatation catheter system has the balloon dilatation function and the radiography function at the same time, and by means of the image and data processing technology, the intelligent level of medical instruments is improved.

The present application relates to the technical field of orthopedic surgery, more specifically to a drilling and bone scraping device used in the transpedicular approach and a method for using the same; the method is: verifying the puncture position under fluoroscopy during the operation; connecting the inclined angle connector in the operating room, gradually expanding the bone channel by adjusting the drilling and bone scraping device; using the drilling and bone scraping device with different angles to reach the intervertebral space through the bone channel, and preferentially scraping off the hardened bone; controlling the drilling and bone scraping device and the drilling guard frame to align the position for drilling or scraping the bone channel; blocking the foreign matter around the drilling position by the drilling guard frame, recycling the bone debris during the drilling process, and completing the drilling of the bone channel; placing the funnel designed into the target intervertebral space through the bone channel, and knocking the bone graft material into the intervertebral space; the present application solves the problem of being unable to automatically punch at a specified angle and depth during the transpedicular approach.

The invention discloses an electronic perspective drawing prompting method based on a knowledge graph, and belongs to the technical field of computers. The method comprises the following steps: performing deep semantic analysis on an electronic perspective drawing request input by a user to extract a keyword set; establishing a dynamic adjustable reference grid in a three-dimensional space; determining a target entity corresponding to each keyword, and determining a plurality of drawing prompt words according to the target entities corresponding to all the keywords; according to the dynamic adjustable reference grid, carrying out spatial relation processing and scale proportion adjustment on the determined drawing cue word; based on the knowledge graph and the dynamic adjustable reference grid, an intelligent perspective correction algorithm is executed, and an accurate correction suggestion is generated; analyzing a drawing behavior and a drawing sequence of the user in real time, and inferring a drawing intention of the user in combination with an expert experience mode in the knowledge graph; and displaying the processed drawing prompt words, correction suggestions and intention inference results on the client in an augmented reality mode.

The invention discloses a pelvic channel screw positioning system with a digital navigation interface, and belongs to the technical field of medical instruments, the pelvic channel screw positioning system comprises an arc-shaped positioner main body, a guide sleeve slidably connected to an adjusting device through a sliding block and a locking mechanism, and the digital navigation interface is rigidly fixed to the side portion of the guide sleeve. The digital tracing interface is used for installing an optical or electromagnetic space tracing element, and when the guide sleeve slides in the second sliding groove along with the sliding block, the digital tracing interface synchronously collects vector displacement data and converts the vector displacement data into needle passage axis coordinates through a mapping matrix. The problem that repeated X-ray perspective positioning is needed in a traditional pelvic surgery is solved, real-time needle insertion deviation feedback is achieved through a digital interface, the accuracy of screw implantation is remarkably improved, and the risk of radiation exposure of doctors and patients is reduced.

Excitation and emission filters can be arranged on different platforms, such as two distinct filter wheels. In this way, any permutation of excitation and emission filters can be used in combination with one another. Filters can be arranged in a filter wheel using a combination of magnetic and mechanical features that provide quick replacement while maintaining alignment and positioning precision.