Patents by Inventor Alexander Hartov

Alexander Hartov 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).

  • Patent number: 11786283
    Abstract: A system and method for installation of a k-wire through a scaphoid or other fractured bone can include a guide block for accurate trajectory of a k-wire. A support frame for a guide block can be casted and/or secured into place, and a CT scan is obtained, so the fractured bone and the location of the window can be known in the same three-dimensional space. An ideal k-wire trajectory can be plotted through the fractured bone, and a guide block with a lumen can be designed and printed using a three-dimensional printer. The guide block can be inserted into the frame so the lumen aligns with the ideal k-wire trajectory, and a k-wire can be inserted through the lumen into the fractured bone. The net effect would be ideal placement of the k-wire that would facilitate the ultimate insertion of a percutaneous screw to provide fixation of the fractured bone.
    Type: Grant
    Filed: May 23, 2022
    Date of Patent: October 17, 2023
    Assignees: Dartmouth-Hitchcock Clinic, The Trustees of Dartmouth College
    Inventors: Matthew C. DeWolf, Alexander Hartov, Lance G. Warhold
  • Publication number: 20230320649
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon’s perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Application
    Filed: May 31, 2023
    Publication date: October 12, 2023
    Applicant: The Trustees of Dartmouth College
    Inventors: David W. ROBERTS, Keith D. PAULSEN, Alexander HARTOV, Songbai JI, Xiaoyao FAN
  • Patent number: 11690558
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon's perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Grant
    Filed: September 27, 2021
    Date of Patent: July 4, 2023
    Assignee: The Trustees of Dartmouth College
    Inventors: David W. Roberts, Keith D. Paulsen, Alexander Hartov, Songbai Ji, Xiaoyao Fan
  • Patent number: 11337744
    Abstract: A system and method for installation of a k-wire through a scaphoid or other fractured bone can include a guide block for accurate trajectory of a k-wire. A support frame for a guide block can be casted and/or secured into place, and a CT scan is obtained, so the fractured bone and the location of the window can be known in the same three-dimensional space. An ideal k-wire trajectory can be plotted through the fractured bone, and a guide block with a lumen can be designed and printed using a three-dimensional printer. The guide block can be inserted into the frame so the lumen aligns with the ideal k-wire trajectory, and a k-wire can be inserted through the lumen into the fractured bone. The net effect would be ideal placement of the k-wire that would facilitate the ultimate insertion of a percutaneous screw to provide fixation of the fractured bone.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: May 24, 2022
    Assignee: Dartmouth-Hitchcock Clinic and The Trustees of Dartmouth College
    Inventors: Matthew C. DeWolf, Alexander Hartov, Lance G. Warhold
  • Publication number: 20220007991
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon's perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Application
    Filed: September 27, 2021
    Publication date: January 13, 2022
    Inventors: David W. ROBERTS, Keith D. PAULSEN, Alexander HARTOV, Songbai JI, Xiaoyao FAN
  • Patent number: 11129562
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon's perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Grant
    Filed: February 10, 2020
    Date of Patent: September 28, 2021
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: David W. Roberts, Keith D. Paulsen, Alexander Hartov, Songbai Ji, Xiaoyao Fan
  • Patent number: 10993677
    Abstract: A method for cardiovascular-dynamics correlated imaging includes receiving a time series of images of at least a portion of a patient, receiving a time series of cardiovascular data for the patient, evaluating correlation between the time series of images and the time series of cardiovascular data, and determining a property of the at least a portion of a patient, based upon the correlation. A system for cardiovascular-dynamics correlated imaging includes a processing device having: a processor, a memory communicatively coupled therewith, and a correlation module including machine-readable instructions stored in the memory that, when executed by the processor, perform the function of correlating a time series of images of at least a portion of a patient with a time series of cardiovascular data of the patient to determine a property of the at least a portion of a patient.
    Type: Grant
    Filed: March 2, 2020
    Date of Patent: May 4, 2021
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: Ryan J. Halter, Keith D. Paulsen, Alexander Hartov
  • Publication number: 20200214646
    Abstract: A method for cardiovascular-dynamics correlated imaging includes receiving a time series of images of at least a portion of a patient, receiving a time series of cardiovascular data for the patient, evaluating correlation between the time series of images and the time series of cardiovascular data, and determining a property of the at least a portion of a patient, based upon the correlation. A system for cardiovascular-dynamics correlated imaging includes a processing device having: a processor, a memory communicatively coupled therewith, and a correlation module including machine-readable instructions stored in the memory that, when executed by the processor, perform the function of correlating a time series of images of at least a portion of a patient with a time series of cardiovascular data of the patient to determine a property of the at least a portion of a patient.
    Type: Application
    Filed: March 2, 2020
    Publication date: July 9, 2020
    Inventors: Ryan J. HALTER, Keith D. PAULSEN, Alexander HARTOV
  • Publication number: 20200170535
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon's perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Application
    Filed: February 10, 2020
    Publication date: June 4, 2020
    Inventors: David W. ROBERTS, Keith D. PAULSEN, Alexander HARTOV, Songbai JI, Xiaoyao FAN
  • Patent number: 10575792
    Abstract: A method for cardiovascular-dynamics correlated imaging includes receiving a time series of images of at least a portion of a patient, receiving a time series of cardiovascular data for the patient, evaluating correlation between the time series of images and the time series of cardiovascular data, and determining a property of the at least a portion of a patient, based upon the correlation. A system for cardiovascular-dynamics correlated imaging includes a processing device having: a processor, a memory communicatively coupled therewith, and a correlation module including machine-readable instructions stored in the memory that, when executed by the processor, perform the function of correlating a time series of images of at least a portion of a patient with a time series of cardiovascular data of the patient to determine a property of the at least a portion of a patient.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: March 3, 2020
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: Ryan J. Halter, Keith D. Paulsen, Alexander Hartov
  • Patent number: 10568535
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon's perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: February 25, 2020
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: David W. Roberts, Keith D. Paulsen, Alexander Hartov, Songbai Ji, Xiaoyao Fan
  • Publication number: 20190183432
    Abstract: A method for cardiovascular-dynamics correlated imaging includes receiving a time series of images of at least a portion of a patient, receiving a time series of cardiovascular data for the patient, evaluating correlation between the time series of images and the time series of cardiovascular data, and determining a property of the at least a portion of a patient, based upon the correlation. A system for cardiovascular-dynamics correlated imaging includes a processing device having: a processor, a memory communicatively coupled therewith, and a correlation module including machine-readable instructions stored in the memory that, when executed by the processor, perform the function of correlating a time series of images of at least a portion of a patient with a time series of cardiovascular data of the patient to determine a property of the at least a portion of a patient.
    Type: Application
    Filed: February 18, 2019
    Publication date: June 20, 2019
    Inventors: Ryan J. HALTER, Keith D. PAULSEN, Alexander HARTOV
  • Patent number: 10222438
    Abstract: A system for measuring responses of magnetic nanoparticles has static magnetic bias field along first axis, and AC driving coils providing AC magnetic field along second axis perpendicular to the first axis, both fields passing through an imaging zone. Sensing coils are oriented to sense fields parallel to the first axis, but not parallel to the second axis. A processor determines responses of nanoparticles in the imaging zone to the AC field. Another system has DC bias on first axis and AC driving coils providing an AC magnetic field along a second axes, magnetic gradient oriented along the first and/or second axis, and the second axis is rotated mechanically or electronically. The signal processor provides a voxel-based model of magnetic nanoparticle distribution in imaging zone. In some embodiments, the static magnet is a main magnet of a magnetic resonance imaging system.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: March 5, 2019
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: John B. Weaver, Alexander Hartov
  • Patent number: 10206632
    Abstract: A method for cardiovascular-dynamics correlated imaging includes receiving a time series of images of at least a portion of a patient, receiving a time series of cardiovascular data for the patient, evaluating correlation between the time series of images and the time series of cardiovascular data, and determining a property of the at least a portion of a patient, based upon the correlation. A system for cardiovascular-dynamics correlated imaging includes a processing device having: a processor, a memory communicatively coupled therewith, and a correlation module including machine-readable instructions stored in the memory that, when executed by the processor, perform the function of correlating a time series of images of at least a portion of a patient with a time series of cardiovascular data of the patient to determine a property of the at least a portion of a patient.
    Type: Grant
    Filed: July 27, 2015
    Date of Patent: February 19, 2019
    Assignee: THE TRUSTEES OF DARTMOUTH COLLEGE
    Inventors: Ryan J. Halter, Keith D. Paulsen, Alexander Hartov
  • Publication number: 20170224288
    Abstract: A method for cardiovascular-dynamics correlated imaging includes receiving a time series of images of at least a portion of a patient, receiving a time series of cardiovascular data for the patient, evaluating correlation between the time series of images and the time series of cardiovascular data, and determining a property of the at least a portion of a patient, based upon the correlation. A system for cardiovascular-dynamics correlated imaging includes a processing device having: a processor, a memory communicatively coupled therewith, and a correlation module including machine-readable instructions stored in the memory that, when executed by the processor, perform the function of correlating a time series of images of at least a portion of a patient with a time series of cardiovascular data of the patient to determine a property of the at least a portion of a patient.
    Type: Application
    Filed: July 27, 2015
    Publication date: August 10, 2017
    Inventors: Ryan J. HALTER, Keith D. PAULSEN, Alexander HARTOV
  • Publication number: 20170085855
    Abstract: A surgical guidance system has two cameras to provide stereo image stream of a surgical field; and a stereo viewer. The system has a 3D surface extraction module that generates a first 3D model of the surgical field from the stereo image streams; a registration module for co-registering annotating data with the first 3D model; and a stereo image enhancer for graphically overlaying at least part of the annotating data onto the stereo image stream to form an enhanced stereo image stream for display, where the enhanced stereo stream enhances a surgeon's perception of the surgical field. The registration module has an alignment refiner to adjust registration of the annotating data with the 3D model based upon matching of features within the 3D model and features within the annotating data; and in an embodiment, a deformation modeler to deform the annotating data based upon a determined tissue deformation.
    Type: Application
    Filed: December 2, 2016
    Publication date: March 23, 2017
    Inventors: David W. ROBERTS, Keith D. PAULSEN, Alexander HARTOV, Songbai JI, Frederic LEBLOND, Brian W. POGUE, Scott C. DAVIS, Dax KEPSHIRE
  • Publication number: 20150276902
    Abstract: A system for measuring responses of magnetic nanoparticles has static magnetic bias field along first axis, and AC driving coils providing AC magnetic field along second axis perpendicular to the first axis, both fields passing through an imaging zone. Sensing coils are oriented to sense fields parallel to the first axis, but not parallel to the second axis. A processor determines responses of nanoparticles in the imaging zone to the AC field. Another system has DC bias on first axis and AC driving coils providing an AC magnetic field along a second axes, magnetic gradient oriented along the first and/or second axis, and the second axis is rotated mechanically or electronically. The signal processor provides a voxel-based model of magnetic nanoparticle distribution in imaging zone. In some embodiments, the static magnet is a main magnet of a magnetic resonance imaging system.
    Type: Application
    Filed: November 1, 2013
    Publication date: October 1, 2015
    Inventors: John B. Weaver, Alexander Hartov
  • Patent number: 9052384
    Abstract: A method of calibrating a transformation of ultrasound data in an imaging system from a first coordinate system into a second coordinate system, the method including applying a transformation having parameters. The parameters are calibrated by imaging a planar object, extracting points corresponding to ultrasound rays intersecting the planar object, and fitting the parameters such that the points when transformed by the transformation describe a planar surface in the second coordinate system.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: June 9, 2015
    Assignee: The Trustees of Dartmouth College
    Inventors: Alexander Hartov, Keith D. Paulsen, David William Roberts
  • Publication number: 20110153254
    Abstract: A method of calibrating a transformation of ultrasound data in an imaging system from a first coordinate system into a second coordinate system, the method comprising applying a transformation having parameters. The parameters are calibrated by imaging a planar object, extracting points corresponding to ultrasound rays intersecting the planar object, and fitting the parameters such that the points when transformed by the transformation describe a planar surface in the second coordinate system.
    Type: Application
    Filed: May 22, 2009
    Publication date: June 23, 2011
    Inventors: Alexander Hartov, Keith D. Paulsen, David William Roberts
  • Publication number: 20060173509
    Abstract: The present invention relates to a method for the detection and ablation of aberrant thalamic oscillations leading to tremor and/or seizure. The invention provides a high frequency stimulator useful for treating and/or preventing the onset of tremor and seizure.
    Type: Application
    Filed: October 5, 2005
    Publication date: August 3, 2006
    Inventors: Kendall Lee, David Roberts, Alexander Hartov