Patents by Inventor VENKATESH VASUDEVAN
VENKATESH VASUDEVAN has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11880955Abstract: A map generator can be programmed to generate a multi-parameter graphical map by encoding at least two different physiological parameters for a geometric surface, corresponding to tissue of a patient, using different color components of a multi-dimensional color model such that each of the different physiological parameters is encoded by at least one of the different color components.Type: GrantFiled: October 21, 2019Date of Patent: January 23, 2024Assignee: CARDIOINSIGHT TECHNOLOGIES INC.Inventors: Qingguo Zeng, Charulatha Ramanathan, Venkatesh Vasudevan, Rémi Dubois, Ping Jia
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Patent number: 11324433Abstract: A method can include storing input electrical signal data representing at least a given electrophysiological signal acquired from a patient. A non-local mean filter can be applied to the given electrophysiological signal, the non-local mean filter including a spatial filter component and an intensity filter component. The method can also include controlling parameters to establish weighting of each of the spatial filter component and the intensity filter component in response to a control input. Filtered signal data can be stored based on the applying and the controlling.Type: GrantFiled: April 27, 2018Date of Patent: May 10, 2022Assignee: CARDIOINSIGHT TECHNOLOGIES, INC.Inventors: Qingguo Zeng, Venkatesh Vasudevan, Charulatha Ramanathan, Ping Jia
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Publication number: 20200093444Abstract: A map generator can be programmed to generate a multi-parameter graphical map by encoding at least two different physiological parameters for a geometric surface, corresponding to tissue of a patient, using different color components of a multi-dimensional color model such that each of the different physiological parameters is encoded by at least one of the different color components.Type: ApplicationFiled: October 21, 2019Publication date: March 26, 2020Inventors: QINGGUO ZENG, CHARULATHA RAMANATHAN, VENKATESH VASUDEVAN, RÉMI DUBOIS, PING JIA
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Patent number: 10482680Abstract: A map generator can be programmed to generate a multi-parameter graphical map by encoding at least two different physiological parameters for a geometric surface, corresponding to tissue of a patient, using different color components of a multi-dimensional color model such that each of the different physiological parameters is encoded by at least one of the different color components.Type: GrantFiled: January 17, 2014Date of Patent: November 19, 2019Assignee: CARDIOINSIGHT TECHNOLOGIES, INC.Inventors: Qingguo Zeng, Charulatha Ramanathan, Venkatesh Vasudevan, Remi Dubois, Ping Jia
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Patent number: 10194982Abstract: A non-transitory computer-readable medium can have instructions executable by a processor. The instructions can include an electrogram reconstruction method to generate reconstructed electrogram signals for each of a multitude of points residing on or near a predetermined cardiac envelope based on geometry data and non-invasively measured body surface electrical signals. The instructions can include a phase calculator to compute phase signals for the multitude of points based on the reconstructed electrogram signals and a visualization engine to generate an output based on the computed phase signals.Type: GrantFiled: August 2, 2016Date of Patent: February 5, 2019Assignee: CARDIOINSIGHT TECHNOLOGIES, INC.Inventors: Rémi Dubois, Brian P. George, Charulatha Ramanathan, Qingguo Zeng, Maria Strom, Venkatesh Vasudevan, Ryan Bokan, Ping Jia
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Patent number: 10117594Abstract: Systems and methods are provided to detect and analyze arrhythmia drivers. In one example, a system can include a wave front analyzer programmed to compute wave front lines extending over a surface for each of the plurality of time samples based on phase information computed from electrical data at nodes distributed across the surface. A trajectory detector can be programmed to compute wave break points for each of the wave front lines and to determine a trajectory of at least one rotor core across the surface. A stability detector can be programmed to identify at least one stable rotor portion corresponding to subtrajectories of the determined trajectory.Type: GrantFiled: August 18, 2016Date of Patent: November 6, 2018Assignee: CARDIOINSIGHT TECHNOLOGIES, INC.Inventors: Qingguo Zeng, Ping Jia, Ryan Bokan, Brian P. George, Charulatha Ramanathan, Venkatesh Vasudevan, Maria Strom
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Publication number: 20180242873Abstract: A method can include storing input electrical signal data representing at least a given electrophysiological signal acquired from a patient. A non-local mean filter can be applied to the given electrophysiological signal, the non-local mean filter including a spatial filter component and an intensity filter component. The method can also include controlling parameters to establish weighting of each of the spatial filter component and the intensity filter component in response to a control input. Filtered signal data can be stored based on the applying and the controlling.Type: ApplicationFiled: April 27, 2018Publication date: August 30, 2018Inventors: QINGGUO ZENG, VENKATESH VASUDEVAN, CHARULATHA RAMANATHAN, PING JIA
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Patent number: 10039464Abstract: A method to calculate and visualize dynamic wave front propagation of electrical signals on a geometric surface is described. Wave front locations are identified on the geometric surface between each identified pair of adjacent nodes on the geometric surface. A graphical map can be generated to represent the identified wave front locations on at least a portion of the geometric surface.Type: GrantFiled: January 17, 2014Date of Patent: August 7, 2018Assignee: CARDIOINSIGHT TECHNOLOGIES, INC.Inventors: Remi Dubois, Qingguo Zeng, Ping Jia, Venkatesh Vasudevan, Charulatha Ramanathan
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Patent number: 9977060Abstract: A computer-implemented method can include determining an amplitude for each of a plurality of input channels, corresponding to respective nodes. A measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. The method can also include comparing an amplitude for each node relative to other nodes to determine temporary bad channels. For each of the temporary bad channels, a measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. Channel integrity can then be identified based on the computed measures of similarity.Type: GrantFiled: September 19, 2016Date of Patent: May 22, 2018Assignee: Cardioinsight Technologies, Inc.Inventors: Brian P. George, Charulatha Ramanathan, Ping Jia, Qingguo Zeng, Venkatesh Vasudevan, Maria Strom, Ryan Bokan, Rémi Dubois
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Patent number: 9974458Abstract: A method can include storing input electrical signal data representing at least a given electrophysiological signal acquired from a patient. A non-local mean filter can be applied to the given electrophysiological signal, the non-local mean filter including a spatial filter component and an intensity filter component. The method can also include controlling parameters to establish weighting of each of the spatial filter component and the intensity filter component in response to a control input. Filtered signal data can be stored based on the applying and the controlling.Type: GrantFiled: January 17, 2014Date of Patent: May 22, 2018Assignee: Cardioinsight Technologies, Inc.Inventors: Qingguo Zeng, Venkatesh Vasudevan, Charulatha Ramanathan, Ping Jia
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Patent number: 9883813Abstract: A method can determine one or more origins of focal activation. The method can include computing phase for the electrical signals at a plurality of nodes distributed across a geometric surface based on the electrical data across time. The method can determine whether or not a given candidate node of the plurality of nodes is a focal point based on the analyzing the computed phase and magnitude of the given candidate node. A graphical map can be generated to visualize focal points detected on the geometric surface.Type: GrantFiled: August 18, 2016Date of Patent: February 6, 2018Assignee: Cardioinsight Technologies, Inc.Inventors: Qingguo Zeng, Rémi DuBois, Ping Jia, Ryan Bokan, Venkatesh Vasudevan, Charulatha Ramanathan, Maria Strom, Brian P. George
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Patent number: 9737267Abstract: A method can include storing a plurality of data sets including values computed for each of a plurality of points for a given spatial region of tissue, the values in each of the data sets characterizing electrical information for each respective point of the plurality of points for a different time interval. The method can also include combining the values computed for each of a plurality of points in a first interval, corresponding to a first map, with the values for computed for each of the respective plurality of points in another interval and to normalize the combined values relative to a common scale. The method can also include generating a composite map for the given spatial region based on the combined values that are normalized.Type: GrantFiled: January 16, 2014Date of Patent: August 22, 2017Assignee: Cardioinsight Technologies, Inc.Inventors: Maria Strom, Qingguo Zeng, Remi Dubois, Ping Jia, Ryan Bokan, Venkatesh Vasudevan, Charulatha Ramanathan, Brian P. George
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Patent number: 9730835Abstract: A vitrectomy surgical system includes a vitrectomy probe having a cutting portion comprising an inner tube, an outer tube, and an aspiration port. The inner tube may be movable relative to the outer tube to cut vitreous fibers. The system also includes a controller associated with the vitrectomy probe and configured to control movement of the inner tube by generating control signals corresponding to a cutting scheme including a plurality of series of cuts with each cut being evenly spaced in time, the plurality of series of cuts separated by a recovery period.Type: GrantFiled: December 4, 2013Date of Patent: August 15, 2017Assignee: Novartis AGInventors: Brian William McDonell, Venkatesh Vasudevan
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Patent number: 9668664Abstract: A method can determine one or more origins of focal activation. The method can include computing phase for the electrical signals at a plurality of nodes distributed across a geometric surface based on the electrical data across time. The method can determine whether or not a given candidate node of the plurality of nodes is a focal point based on the analyzing the computed phase and magnitude of the given candidate node. A graphical map can be generated to visualize focal points detected on the geometric surface.Type: GrantFiled: January 16, 2014Date of Patent: June 6, 2017Assignee: Cardioinsight Technologies, Inc.Inventors: Qingguo Zeng, Remi Dubois, Ping Jia, Ryan Bokan, Venkatesh Vasudevan, Charulatha Ramanathan, Maria Strom, Brian P. George
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Publication number: 20170003332Abstract: A computer-implemented method can include determining an amplitude for each of a plurality of input channels, corresponding to respective nodes. A measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. The method can also include comparing an amplitude for each node relative to other nodes to determine temporary bad channels. For each of the temporary bad channels, a measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. Channel integrity can then be identified based on the computed measures of similarity.Type: ApplicationFiled: September 19, 2016Publication date: January 5, 2017Inventors: BRIAN P. GEORGE, CHARULATHA RAMANATHAN, PING JIA, QINGGUO ZENG, VENKATESH VASUDEVAN, MARIA STROM, RYAN BOKAN, RÉMI DUBOIS
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Publication number: 20160354004Abstract: Systems and methods are provided to detect and analyze arrhythmia drivers. In one example, a system can include a wave front analyzer programmed to compute wave front lines extending over a surface for each of the plurality of time samples based on phase information computed from electrical data at nodes distributed across the surface. A trajectory detector can be programmed to compute wave break points for each of the wave front lines and to determine a trajectory of at least one rotor core across the surface. A stability detector can be programmed to identify at least one stable rotor portion corresponding to subtrajectories of the determined trajectory.Type: ApplicationFiled: August 18, 2016Publication date: December 8, 2016Inventors: QINGGUO ZENG, PING JIA, RYAN BOKAN, BRIAN P. GEORGE, CHARULATHA RAMANATHAN, VENKATESH VASUDEVAN, MARIA STROM
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Publication number: 20160354002Abstract: A method can determine one or more origins of focal activation. The method can include computing phase for the electrical signals at a plurality of nodes distributed across a geometric surface based on the electrical data across time. The method can determine whether or not a given candidate node of the plurality of nodes is a focal point based on the analyzing the computed phase and magnitude of the given candidate node. A graphical map can be generated to visualize focal points detected on the geometric surface.Type: ApplicationFiled: August 18, 2016Publication date: December 8, 2016Inventors: QINGGUO ZENG, RÉMI DUBOIS, PING JIA, RYAN BOKAN, VENKATESH VASUDEVAN, CHARULATHA RAMANATHAN, MARIA STROM, BRIAN P. GEORGE
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Publication number: 20160338772Abstract: A non-transitory computer-readable medium can have instructions executable by a processor. The instructions can include an electrogram reconstruction method to generate reconstructed electrogram signals for each of a multitude of points residing on or near a predetermined cardiac envelope based on geometry data and non-invasively measured body surface electrical signals. The instructions can include a phase calculator to compute phase signals for the multitude of points based on the reconstructed electrogram signals and a visualization engine to generate an output based on the computed phase signals.Type: ApplicationFiled: August 2, 2016Publication date: November 24, 2016Inventors: RÉMI DUBOIS, BRIAN P. GEORGE, CHARULATHA RAMANATHAN, QINGGUO ZENG, MARIA STROM, VENKATESH VASUDEVAN, RYAN BOKAN, PING JIA
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Patent number: 9470728Abstract: A computer-implemented method can include determining an amplitude for each of a plurality of input channels, corresponding to respective nodes. A measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. The method can also include comparing an amplitude for each node relative to other nodes to determine temporary bad channels. For each of the temporary bad channels, a measure of similarity can be computed between the input channel of each node and the input channel of its neighboring nodes. Channel integrity can then be identified based on the computed measures of similarity.Type: GrantFiled: May 8, 2013Date of Patent: October 18, 2016Assignee: Cardioinsight Technologies, Inc.Inventors: Brian P. George, Charulatha Ramanathan, Ping Jia, Qingguo Zeng, Venkatesh Vasudevan, Maria Strom, Ryan Bokan, Remi Dubois
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Patent number: 9433364Abstract: A method can determine one or more origins of focal activation. The method can include computing phase for the electrical signals at a plurality of nodes distributed across a geometric surface based on the electrical data across time. The method can determine whether or not a given candidate node of the plurality of nodes is a focal point based on the analyzing the computed phase and magnitude of the given candidate node. A graphical map can be generated to visualize focal points detected on the geometric surface.Type: GrantFiled: January 16, 2014Date of Patent: September 6, 2016Assignee: Cardioinsight Technologies, Inc.Inventors: Qingguo Zeng, Remi Dubois, Ping Jia, Ryan Bokan, Venkatesh Vasudevan, Charulatha Ramanathan, Maria Strom, Brian P. George