Patents by Inventor Dan Ruan
Dan Ruan 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: 11929840Abstract: Management of web conference assets in a content management system. At the conclusion of a web conferencing session, an event is raised at the content management system. Various web conference assets (e.g., recordings) and web conference parameters are analyzed in conjunction with content management system metadata. Based on the analysis, one or more actions to perform on the web conference assets are determined. The content management system metadata may include user profile information of at least one web conference participant. Rules and/or a classification model that considers then-current conditions at the content management system are used singly, or in combination, to determine action characteristics and/or labels such as a retention period or security classifications to apply to the web conference assets. The web conference assets are stored in a hierarchical directory at the content management system. The hierarchy of the directory is derived from aspects of the web conferencing facility.Type: GrantFiled: February 6, 2023Date of Patent: March 12, 2024Assignee: Box, Inc.Inventors: Anna Quincy, Dan O'Leary, Nathaniel Schlein, Michelle Sangeun Oh, Irving Ruan, Aaron Levie
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Patent number: 10987523Abstract: In certain embodiments novel sparse orthogonal collimators (SOCs) for use in radiotherapy are provided. In certain embodiments the SOCs comprise 2 layer 4 bank orthogonal collimators with 2-8 leaves in each of the 4 banks. Instead of using the limited heuristic approach to create jaw-only IMRT, a novel fluence map optimization method is provided based on wavelet decomposition and this method is used for IMRT. An algorithm to simplify the fluence maps with minimal and predictable dose quality compromise is also provided.Type: GrantFiled: October 21, 2016Date of Patent: April 27, 2021Assignee: The Regents of the University of CaliforniaInventors: Ke Sheng, Dan Nguyen, Dan Ruan
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Patent number: 10549116Abstract: In various embodiments, methods and devices are provided for generating a radiotherapy treatment plan for a subject to be implemented on a radiotherapy device. In certain embodiments the methods involve determining all feasible radiotherapy beam orientations free of collision for said radiotherapy device and said subject to provide a set of radiotherapy beam orientations; selecting from the set of all feasible radiotherapy beam orientations a subset of beams that meet treatment goals to be used in treatment of the subject to provide a selected beam set; calculating a navigation trajectory for the radiotherapy device to delivery said subset of beams to the subject where the trajectory is free of collision; and generating and writing instruction files to a tangible medium that can be executed by said radiotherapy device.Type: GrantFiled: March 1, 2016Date of Patent: February 4, 2020Assignee: The Regents of the University of CaliforniaInventors: Ke Sheng, Dan Ruan, Daniel A. Low
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Publication number: 20190054316Abstract: In certain embodiments novel sparse orthogonal collimators (SOCs) for use in radiotherapy are provided. In certain embodiments the SOCs comprise 2 layer 4 bank orthogonal collimators with 2-8 leaves in each of the 4 banks. Instead of using the limited heuristic approach to create jaw-only IMRT, a novel fluence map optimization method is provided based on wavelet decomposition and this method is used for IMRT. An algorithm to simplify the fluence maps with minimal and predictable dose quality compromise is also provided.Type: ApplicationFiled: October 21, 2016Publication date: February 21, 2019Inventors: Ke SHENG, Dan NGUYEN, Dan RUAN
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Publication number: 20180043183Abstract: In various embodiments, methods and devices are provided for generating a radiotherapy treatment plan for a subject to be implemented on a radiotherapy device. In certain embodiments the methods involve determining all feasible radiotherapy beam orientations free of collision for said radiotherapy device and said subject to provide a set of radiotherapy beam orientations; selecting from the set of all feasible radiotherapy beam orientations a subset of beams that meet treatment goals to be used in treatment of the subject to provide a selected beam set; calculating a navigation trajectory for the radiotherapy device to delivery said subset of beams to the subject where the trajectory is free of collision; and generating and writing instruction files to a tangible medium that can be executed by said radiotherapy device.Type: ApplicationFiled: March 1, 2016Publication date: February 15, 2018Inventors: Ke Sheng, Dan Ruan, Dan A. Low
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Publication number: 20150257718Abstract: Disclosed herein are methods, systems and therapeutics concerning radiotherapy of microscopic disease based on realtime imaging. The system comprises an intra-corporeal component and an extra-corporeal component. The intra-corporeal component comprises a detector/imaging subunit and a treatment subunit, where both subunits are placed in a cavity of a patient. The extra-corporeal component comprises a detector that is placed outside any cavity of the patient. Through this system, a treatment can be applied to a target tissue in a patient concurrently or within a short period time to signal detections.Type: ApplicationFiled: September 27, 2013Publication date: September 17, 2015Applicant: The Regents of the University of CaliforniaInventors: Keisuke S. Iwamoto, Magnus Dahlbom, John J. Demarco, Dan Ruan
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Patent number: 8971489Abstract: A method of multileaf collimator (MLC) leaf positioning in tracking-based adaptive radiotherapy is provided. The method includes determining a radiotherapy beam pattern by transforming a treatment beam plan into radiotherapy beam coordinates, determining a dose discrepancy between the radiotherapy beam pattern and a deliverable MLC aperture, where the dose discrepancy includes a sum of an overdose cost and an underdose cost to a treatment volume, and minimizing the dose discrepancy, where the dose discrepancy minimization provides a determined deliverable MLC aperture for the radiotherapy beam.Type: GrantFiled: July 9, 2010Date of Patent: March 3, 2015Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Dan Ruan, Paul J. Keall, Amit Sawant
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Patent number: 8837674Abstract: A method of minimizing radiation toxicity in image guided radiotherapy (IGRT) is provided that includes using a probabilistic prediction algorithm that is operated on a suitably programmed computer and includes multimodality inputs and provides real-time geometric and topological target estimates to compensate for system latency, using an online adaptive imaging system that provides radiographic images of the target when the geometric and topological target estimates are in a region of predefined uncertainty, and using an image dose control algorithm, operating on a suitably programmed computer, that includes parameters for controlling dose per image, where instances for image acquisition are optimized according to a planned dose pattern and delivery result.Type: GrantFiled: August 26, 2011Date of Patent: September 16, 2014Assignee: The Board of Trustees of the Leland Stanford Junior UniversityInventors: Dan Ruan, Paul J. Keall
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Publication number: 20120099704Abstract: A method of multileaf collimator (MLC) leaf positioning in tracking-based adaptive radiotherapy is provided. The method includes determining a radiotherapy beam pattern by transforming a treatment beam plan into radiotherapy beam coordinates, determining a dose discrepancy between the radiotherapy beam pattern and a deliverable MLC aperture, where the dose discrepancy includes a sum of an overdose cost and an underdose cost to a treatment volume, and minimizing the dose discrepancy, where the dose discrepancy minimization provides a determined deliverable MLC aperture for the radiotherapy beam.Type: ApplicationFiled: July 9, 2010Publication date: April 26, 2012Applicant: THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITYInventors: Dan Ruan, Paul J. Keall, Amit Sawant
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Publication number: 20120076270Abstract: A method of minimizing radiation toxicity in image guided radiotherapy (IGRT) is provided that includes using a probabilistic prediction algorithm that is operated on a suitably programmed computer and includes multimodality inputs and provides real-time geometric and topological target estimates to compensate for system latency, using an online adaptive imaging system that provides radiographic images of the target when the geometric and topological target estimates are in a region of predefined uncertainty, and using an image dose control algorithm, operating on a suitably programmed computer, that includes parameters for controlling dose per image, where instances for image acquisition are optimized according to a planned dose pattern and delivery result.Type: ApplicationFiled: August 26, 2011Publication date: March 29, 2012Inventors: Dan Ruan, Paul J. Keall
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Publication number: 20110009761Abstract: A method of profiling respiratory motion is provided that includes estimating a temporal respiratory pattern, using a warping function to map the temporal respiratory pattern to a corresponding phase value, using a baseline drift function to determine drift in the temporal respiratory pattern, and noise filtering the temporal respiratory pattern, where variations in a respiratory motion are provided. The warping function includes combining an elliptical shape prior for providing iso-phase events in real-time, where the elliptical shape prior is in an augmented state space and Poincare´ sectioned. Parameters of the ellipse are estimated, where a projection of a center of the ellipse onto an observed respiratory position provides a real-time estimation for baseline drift of the respiratory motion.Type: ApplicationFiled: July 9, 2010Publication date: January 13, 2011Inventors: Dan Ruan, Paul J. Keall