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134 results about "Partial occlusion" patented technology
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The partial occlusion of the blood flow may mean that when the heart tries to work harder, and to speed up the supply of oxygen carried in the blood is insufficient and the patient experiences pain ( angina ). This is sometimes called 'angina of effort'.
Methods and systems for treating ischemia
InactiveUS6295990B1Promote dissolution and removalMinimize and prevent ischemiaStentsBalloon catheterControl mannerDecreased mean arterial pressure
Methods for treating total and partial occlusions employ a perfusion conduit which is penetrated through the occlusive material. Oxygenated blood or other medium is then perfused through the conduit in a controlled manner, preferably at a controlled pressure below the arterial pressure, to maintain oxygenation and relieve ischemia in tissue distal to the occlusion. In another aspect, interventional devices, such as stents or balloon catheters, are passed through the perfusion catheter to remove obstructions. Optionally, the occlusion may be treated while perfusion is maintained, typically by introducing a thrombolytic or other agent into the occlusive material using the perfusion conduit or by employing mechanical means to remove the obstruction. Such methods are particularly suitable for treating acute stroke to prevent damage to the cerebral tissue.
Owner:SALIENT INTERVENTIONAL SYST
Method and device for monitoring blood pressure
A device for continuously monitoring a user's arterial blood pressure has a sensor adapted to continuously detect the blood pressure and to generate signals representative thereof by contact with an external surface of the user's body at a location adjacent an artery. The sensor is securely held in operable contact with the user's body at the location. A microprocessor interprets the signals generated by the sensor to determine actual arterial blood pressure. The sensor includes a projecting portion for detecting and transmitting changes in blood pressure, wherein the projecting portion is adapted to effect at least partial occlusion of the artery at the location.
Owner:HEALTHSTATS INT PTE
Methods and systems for treating ischemia
Methods for treating total and partial occlusions employ a perfusion conduit which is penetrated through the occlusive material. Oxygenated blood or other medium is then perfused through the conduit to maintain oxygenation and relieve ischemia in tissue distal to the occlusion. Optionally, the occlusion may be treated while perfusion is maintained, typically by introducing a thrombolytic or other agent into the occlusive material using the perfusion conduit. Such methods are particularly suitable for treating acute stroke to prevent irreversible damage to the cerebral tissue.
Owner:SALIENT INTERVENTIONAL SYST
Magnetically Guided Atherectomy
Owner:HALL ANDREW F +1
Devices and methods for preventing distal embolization using flow reversal by partial occlusion of the brachiocephalic artery
InactiveUS6837881B1Prevention of distal embolizationMinimizing blood lossStentsBalloon catheterAtherectomyPercutaneous angioplasty
The invention provides a medical device having a catheter and one or more expandable constricting / occluding members. The catheter is adapted for use with therapeutic or diagnostic devices, including an angioplasty / stent catheter and an atherectomy catheter. The constrictor / occluder is mounted at the distal end of the catheter. Manometers may be mounted distal to one or more constrictors for measuring pressure distal to the constrictor(s). Methods of using the devices for preventing distal embolization during extracranial or intracranial carotid procedures or vertebral artery procedures by reversing blood flow in an internal carotid artery, an external carotid artery, and / or a common carotid artery toward the subclavian artery are disclosed.
Owner:ZOLL CIRCULATION
Methods and systems for treating ischemia
InactiveUS6435189B1Promote dissolution and removalMinimize and prevent ischemiaStentsBalloon catheterControl mannerDecreased mean arterial pressure
Methods for treating total and partial occlusions employ a perfusion conduit which is penetrated through the occlusive material. Oxygenated blood or other medium is then perfused through the conduit in a controlled manner, preferably at a controlled pressure below the arterial pressure, to maintain oxygenation and relieve ischemia in tissue distal to the occlusion. In another aspect, interventional devices, such as stents or balloon catheters, are passed through the perfusion catheter to remove obstructions. Optionally, the occlusion may be treated while perfusion is maintained, typically by introducing a thrombolytic or other agent into the occlusive material using the perfusion conduit or by employing mechanical means to remove the obstruction. Such methods are particularly suitable for treating acute stroke to prevent damage to the cerebral tissue.
Owner:SALIENT INTERVENTIONAL SYST
Database assisted OCR for street scenes and other images
Optical character recognition (OCR) for images such as a street scene image is generally a difficult problem because of the variety of fonts, styles, colors, sizes, orientations, occlusions and partial occlusions that can be observed in the textual content of such scenes. However, a database query can provide useful information that can assist the OCR process. For instance, a query to a digital mapping database can provide information such as one or more businesses in a vicinity, the street name, and a range of possible addresses. In accordance with an embodiment of the present invention, this mapping information is used as prior information or constraints for an OCR engine that is interpreting the corresponding street scene image, resulting in much greater accuracy of the digital map data provided to the user.
Owner:GOOGLE LLC
Steerable distal support system
InactiveUS7381198B2Sufficient maneuverabilitySufficient torqueabilitySurgeryMedical devicesSupporting systemMedicine
A steerable distal support system for accessing stenosis, partial occlusions, or complete occlusions within a body lumen. The steerable distal support system generally includes an elongate member that comprises a proximal portion, a more flexible intermediate portion and a deflectable distal tip. The deflectable distal tip is at a distal end of the elongate body to facilitate directionality and positioning of the steerable distal support system to the target site. Optionally, an expandable centering assembly may be disposed on the steerable support assembly to center and anchor the steerable support assembly within the body lumen.
Owner:BOSTON SCI SCIMED INC
Treatment of infarct expansion by partially occluding vena cava
InactiveUS20060064059A1Reduces severity and complicationReduce expansionBalloon catheterSurgeryVeinVenous blood flow
A method and apparatus for prevention and reduction of myocardial infarct size and / or expansion and heart remodeling by partial, controllable and reversible obstruction of the venous blood flow to the heart. As a result, the ventricular wall stress and dilation are reduced. Blood flow is maintained at a safe level for the duration of treatment. The apparatus consists of a catheter with an occlusion balloon and a control and monitoring system.
Owner:GELFAND MARK +1
Methods and systems for treating ischemia
InactiveUS6436087B1Promote dissolution and removalMinimize and prevent ischemiaStentsBalloon catheterControl mannerThrombus
Methods for treating total and partial occlusions employ a perfusion conduit which is penetrated through the occlusive material. Oxygenated blood or other medium is then perfused through the conduit in a controlled manner, preferably at a controlled pressure below the arterial pressure, to maintain oxygenation and relieve ischemia in tissue distal to the occlusion. In another aspect, interventional devices, such as stents or balloon catheters, are passed through the perfusion catheter to remove obstructions. Optionally, the occlusion may be treated while perfusion is maintained, typically by introducing a thrombolytic or other agent into the occlusive material using the perfusion conduit or by employing mechanical means to remove the obstruction. Such methods are particularly suitable for treating acute stroke to prevent damage to the cerebral tissue.
Owner:SALIENT INTERVENTIONAL SYST
Methods and devices for delivering a ventricular stent
A method, and related tools for performing the method, of delivering a stent or other like device to the heart to connect the left ventricle to the coronary artery to thereby supply blood directly from the ventricle to the coronary artery may be used to bypass a total or partial occlusion of a coronary artery. The method may include placing a guide device and a dilation device through an anterior wall and a posterior wall of the coronary vessel and through a heart wall between the heart chamber and the coronary vessel. The dilation device may be used to form a passageway in the heart wall at a location defined by the guide device. The method may then include placing a stent within the passageway.
Owner:HORIZON TECH FUNDING CO LLC
Method and apparatus for tracking object, and method and apparatus for calculating object pose information
ActiveUS20080187175A1Improve accuracyReduce processing timeImage analysisGeometric image transformationTemplate matchingPartial occlusion
A method and apparatus for tracking an object, and a method and apparatus for calculating object pose information are provided. The method of tracking the object obtains object feature point candidates by using a difference between pixel values of neighboring frames. A template matching process is performed in a predetermined region having the object feature point candidates as the center. Accordingly, it is possible to reduce a processing time needed for the template matching process. The method of tracking the object is robust in terms of sudden changes in lighting and partial occlusion. In addition, it is possible to track the object in real time. In addition, since the pose of the object, the pattern of the object, and the occlusion of the object are determined, detailed information on action patterns of the object can be obtained in real time.
Owner:SAMSUNG ELECTRONICS CO LTD
Method and device for monitoring blood pressure
A device for continuously monitoring a user's arterial blood pressure has a sensor adapted to continuously detect the blood pressure and to generate signals representative thereof by contact with an external surface of the user's body at a location adjacent an artery. The sensor is securely held in operable contact with the user's body at the location. A microprocessor interprets the signals generated by the sensor to determine the actual arterial blood pressure. The sensor includes a projecting portion for detecting and transmitting changes in blood pressure, wherein the projecting portion is adapted to effect at least partial occlusion of the artery at the location.
Owner:HEALTHSTATS INT PTE
Marker detection method and apparatus, and position and orientation estimation method
InactiveUS20050234333A1Enhance the imageHigh precisionImage enhancementTelevision system detailsMixed realityEstimation methods
This invention relates to a mixed reality presentation apparatus for obtaining the position and orientation of an image sensing unit using markers. Whether or not a marker detected in a captured image has suspicion of partial occlusion is determined by checking if a region that neighbors a marker region includes a predetermined color, thus inhibiting information obtained from the marker with suspicion of partial occlusion from being used in position and orientation estimation of the image sensing unit. The precision of the obtained position and orientation can be improved.
Owner:CANON KK
Simultaneous localization and mapping using multiple view feature descriptors
InactiveUS20050238200A1Efficiently build necessary feature descriptorReliable correspondenceThree-dimensional object recognitionKaiman filterKernel principal component analysis
Simultaneous localization and mapping (SLAM) utilizes multiple view feature descriptors to robustly determine location despite appearance changes that would stifle conventional systems. A SLAM algorithm generates a feature descriptor for a scene from different perspectives using kernel principal component analysis (KPCA). When the SLAM module subsequently receives a recognition image after a wide baseline change, it can refer to correspondences from the feature descriptor to continue map building and / or determine location. Appearance variations can result from, for example, a change in illumination, partial occlusion, a change in scale, a change in orientation, change in distance, warping, and the like. After an appearance variation, a structure-from-motion module uses feature descriptors to reorient itself and continue map building using an extended Kalman Filter. Through the use of a database of comprehensive feature descriptors, the SLAM module is also able to refine a position estimation despite appearance variations.
Owner:HONDA MOTOR CO LTD
Predicate Logic based Image Grammars for Complex Visual Pattern Recognition
InactiveUS20100278420A1Quick and efficient system setupImprove performanceCharacter and pattern recognitionChaos modelsNerve networkAlgorithm
First order predicate logics are provided, extended with a bilattice based uncertainty handling formalism, as a means of formally encoding pattern grmmars, to parse a set of image features, and detect the presence of different patterns of interest implemented on a processor. Information from different sources and uncertainties from detections, are integrated within the bilattice framework. Automated logical rule weight learning in the computer vision domain applies a rule weight optimization method which casts the instantiated inference tree as a knowledge-based neural network, to converge upon a set of rule weights that give optimal performance within the bilattice framework. Applications are in (a) detecting the presence of humans under partial occlusions and (b) detecting large complex man made structures in satellite imagery (c) detection of spatio-temporal human and vehicular activities in video and (c) parsing of Graphical User Interfaces.
Owner:SIEMENS CORP
Occlusive implant and methods for hollow anatomical structure
ActiveUS20070248640A1Promoting occlusive ingrowthInhibit migrationSuture equipmentsOcculdersFiberAnatomical structures
Apparatus and methods for treating a hollow anatomical structure comprises an implant sized for insertion into a hollow anatomical structure. The implant comprises a plurality of loose, bulked fibers. The fibers are formed from one or more bioabsorbable materials. Upon implantation, the apparatus causes a partial occlusion of the hollow anatomical structure, followed by a complete or substantially complete occlusion.
Owner:TYCO HEALTHCARE GRP LP
Reentry cathether and method thereof
ActiveUS20140371718A1Improve device stabilityMinimize impactMulti-lumen catheterCannulasTunica intimaCatheter
Embodiments of the invention are directed towards a rapid exchange catheter configured for insertion into a subintimal space and crossing an occlusion in a subintimal space. The catheter includes a proximal end, a distal end, a first lumen configured to receive a first wire, the first lumen extending longitudinally through a least a lateral port of the catheter, and a second lumen having at least a portion distal of the lateral port and extending through at least the distal end of the catheter. The catheter also includes an exchange port arranged on a exterior portion of the catheter configured to the receive a second wire and second rapid exchange port in communication with the second lumen. Moreover, other embodiments of the invention are directed towards methods for using the rapid exchange catheter to cross an obstruction in a vessel, e.g., a total or partial occlusion, in a subintimal space.
Owner:SPECTRANETICS
Guidewire for crossing occlusions or stenoses
Systems and methods for crossing stenosis, partial occlusions, or complete occlusions within a body lumen. The systems generally include an elongate member such as a hollow guidewire that houses a rotatable and translatable drive shaft. The drive shaft typically has a distal portion that is advanced to create a path in the occlusive material that is large enough to allow the hollow guidewire to cross the occlusive material.
Owner:REVASCULAR THERAPEUTICS
Guidewire for crossing occlusions or stenoses
Systems and methods for crossing stenosis, partial occlusions, or complete occlusions within a body lumen. The systems generally include an elongate member such as a hollow guidewire that houses a rotatable and translatable drive shaft. The drive shaft typically has a distal portion that is advanced to create a path in the occlusive material that is large enough to allow the hollow guidewire to cross the occlusive material.
Owner:REVASCULAR THERAPEUTICS
Catheter deployed partial occlusion devices and methods
InactiveUS20030032976A1Limit pulmonary blood flowReduce riskDilatorsOcculdersCvd riskPulmonary blood flow
A device and method of use for a partial occlusion device (POD) for matter and liquid flow control. More specifically, a device relating to the partial occlusion of blood vessels to affect the flow of blood through the blood vessels is disclosed. The POD may be formed from a mesh material and includes one or more lumens. The POD may be particularly useful in treating Hypoplastic Left Heart Syndrome, by reducing pulmonary blood flow to decrease the risk of pulmonary hypertension. The POD may also be used to deliver therapeutic agents to a specific site. The POD can be retrieved after placement.
Owner:BOUCEK MARK M
Method of recognizing partially occluded and/or imprecisely localized faces
InactiveUS7027620B2Improvement in face recognitionCharacter and pattern recognitionErrors and residualsPartial occlusion
A method of recognizing a test face given an imprecise localization and / or a partially occluded face. Using an eigenspace representation of the learning image, a subspace is computed that represents localization errors within the eigenspace. This is computed by calculating an actual localization error of the localization of the learning image. Accounting for the calculated actual localization error, all possible morphed faces are projected onto the eigenspace. For all possible faces, the subspace is modeled where all of the possible localizations of the possible faces lie using a Gaussian distribution. To accommodate for possible partial occlusions, for all possible faces, the possible faces are divided into n different local parts. Each of the n local parts are modeled using a Gaussian distribution. A global probability of the test face is computed by adding all local probabilities defined by the Gaussian distribution. The test face is recognized based on the computed subspace and / or the accounted for possible partial occlusions.
Owner:SONY CORP +1
Method and apparatus for tracking object, and method and apparatus for calculating object pose information
ActiveUS20150131859A1Improve accuracyReduce processing timeImage analysisGeometric image transformationTemplate matchingEffect light
Owner:SAMSUNG ELECTRONICS CO LTD
Camera calibration with lens distortion from low-rank textures
InactiveUS20120133780A1Simple and accurate and flexibleEfficiently and effectively extractingImage enhancementImage analysisCamera lensImage extraction
A “Camera Calibrator” provides various techniques for recovering intrinsic camera parameters and distortion characteristics by processing a set of one or more input images. These techniques are based on extracting “Transform Invariant Low-Rank Textures” (TILT) from input images using high-dimensional convex optimization tools for matrix rank minimization and sparse signal recovery. The Camera Calibrator provides a simple, accurate, and flexible method to calibrate intrinsic parameters of a camera even with significant lens distortion, noise, errors, partial occlusions, illumination and viewpoint change, etc. Distortions caused by the camera can then be automatically corrected or removed from images. Calibration is achieved under a wide range of practical scenarios, including using multiple images of a known pattern, multiple images of an unknown pattern, single or multiple images of multiple patterns, etc. Significantly, calibration is achieved without extracting or manually identifying low-level features such as corners or edges from the calibration images.
Owner:MICROSOFT TECH LICENSING LLC
Method and system for partial occlusion handling in vehicle tracking using deformable parts model
Provided is a method and system of tracking partially occluded objects using an elastic deformation model. According to an exemplary method and system, partially occluded vehicles are detected and tracked in a scene including side-by-side drive-thru lanes. A method for updating an event sequence includes acquiring video data of a queue area from at least one image source; searching the frames for subjects located at least near a region of interest (ROI) of defined start points in the video data; tracking a movement of each detected subject through the queue area over a subsequent series of frames; using the tracking, determining if a location of the a tracked subject reaches a predefined merge point where multiple queues in the queue area converge into a single queue lane; in response to the tracked subject reaching the predefined merge point, computing an observed sequence of where the tracked subject places among other subjects approaching an end-event point; and, updating a sequence of end-events to match the observed sequence of subjects in the single queue lane.
Owner:CONDUENT BUSINESS SERVICES LLC
Simultaneous localization and mapping using multiple view feature descriptors
InactiveUS7831094B2Efficiently build necessary feature descriptorReliable correspondenceThree-dimensional object recognitionKaiman filterKernel principal component analysis
Owner:HONDA MOTOR CO LTD
Method and device for monitoring blood pressure
A device for continuously monitoring a user's arterial blood pressure has a sensor adapted to continuously detect the blood pressure and to generate signals representative thereof by contact with an external surface of the user's body at a location adjacent an artery. The sensor is securely held in operable contact with the user's body at the location. A microprocessor interprets the signals generated by the sensor to determine the actual arterial blood pressure. The sensor includes a projecting portion for detecting and transmitting changes in blood pressure, wherein the projecting portion is adapted to effect at least partial occlusion of the artery at the location.
Owner:HEALTHSTATS INT PTE
Database assisted OCR for street scenes and other images
Optical character recognition (OCR) for images such as a street scene image is generally a difficult problem because of the variety of fonts, styles, colors, sizes, orientations, occlusions and partial occlusions that can be observed in the textual content of such scenes. However, a database query can provide useful information that can assist the OCR process. For instance, a query to a digital mapping database can provide information such as one or more businesses in a vicinity, the street name, and a range of possible addresses. In accordance with an embodiment of the present invention, this mapping information is used as prior information or constraints for an OCR engine that is interpreting the corresponding street scene image, resulting in much greater accuracy of the digital map data provided to the user.
Owner:GOOGLE LLC
Aneurysm occlusion system and method
An aneurysm occlusion device 10 is positionable within a cerebral blood vessel covering a neck of an aneurysm on the blood vessel. The device includes a tubular element having a lumen surrounded by an occlusive sidewall including a plurality of gaps. The gaps are sufficiently small to cause at least partial occlusion against flow of blood from the blood vessel through the side wall into the aneurysm, but are expandable in response to a fluid pressure differential between a first area inside the lumen and a second area outside the lumen to allow flow of fluid through the side wall between the blood vessel and a side branch vessel.
Owner:PENUMBRA
Auxiliary data for artifacts - aware view synthesis
ActiveUS20170188002A1Reduce artifactsLarge discontinuityCharacter and pattern recognitionImage data processingData packMissing data
Original or compressed Auxiliary Data, including possibly major depth discontinuities in the form of shape images, partial occlusion data, associated tuned and control parameters, and depth information of the original video(s), are used to facilitate the interactive display and generation of new views (view synthesis) of conventional 2D, stereo, and multi-view videos in conventional 2D, 3D (stereo) and multi-view or autostereoscopic displays with reduced artifacts. The partial or full occlusion data includes image, depth and opacity data of possibly partially occluded areas to facilitate the reduction of artifacts in the synthesized view. An efficient method is used for extracting objects at partially occluded regions as defined by the auxiliary data from the texture videos to facilitate view synthesis with reduced artifacts. Further, a method for updating the image background and the depth values uses the auxiliary data after extraction of each object to reduce the artifacts due to limited performance of online inpainting of missing data or holes during view synthesis.
Owner:VERSITECH LTD
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