Patents by Inventor Alexander Ganin
Alexander Ganin 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: 9892515Abstract: Methods and systems for processing a set of images are described. In accordance with this disclosure, images are registered and an analysis is performed in view of one or more constraints (such as constraints based upon anatomical or physiological considerations). Weighting factors are determined based on the analysis. The weighting factors are used in subsequent processing of the registered (and/or unregistered) images and/or to formulate a visualization that conveys the degree of confidence in the motion estimation used in the registration process.Type: GrantFiled: August 3, 2015Date of Patent: February 13, 2018Assignee: General Electric CompanyInventors: Girishankar Gopalakrishnan, Alexander Ganin, Ravindra Mohan Majeshwar, Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Floribertus P. M. Heukensfeldt Jansen, Arunabha Shasanka Roy
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Publication number: 20150339821Abstract: Methods and systems for processing a set of images are described. In accordance with this disclosure, images are registered and an analysis is performed in view of one or more constraints (such as constraints based upon anatomical or physiological considerations). Weighting factors are determined based on the analysis. The weighting factors are used in subsequent processing of the registered (and/or unregistered) images and/or to formulate a visualization that conveys the degree of confidence in the motion estimation used in the registration process.Type: ApplicationFiled: August 3, 2015Publication date: November 26, 2015Inventors: Girishankar Gopalakrishnan, Alexander Ganin, Ravindra Mohan Majeshwar, Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Floribertus P.M. Heukensfeldt Jansen, Arunabha Shasanka Roy
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Patent number: 9129426Abstract: Methods and systems for processing a set of images are described. In accordance with this disclosure, images are registered and an analysis is performed in view of one or more constraints (such as constraints based upon anatomical or physiological considerations). Weighting factors are determined based on the analysis. The weighting factors are used in subsequent processing of the registered (and/or unregistered) images and/or to formulate a visualization that conveys the degree of confidence in the motion estimation used in the registration process.Type: GrantFiled: August 31, 2010Date of Patent: September 8, 2015Assignee: GENERAL ELECTRIC COMPANYInventors: Girishankar Gopalakrishnan, Alexander Ganin, Ravindra Mohan Majeshwar, Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Floribertus P.M. Heukensfeldt Jansen, Arunabha Shasanka Roy
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Patent number: 8835858Abstract: Systems and methods for attenuation compensation in nuclear medicine imaging based on emission data are provided. One method includes acquiring emission data at a plurality of energy windows for a person having administered thereto a radiopharmaceutical comprising at least one radioactive isotope. The method also includes performing a preliminary reconstruction of the acquired emission data to create one or more preliminary images of a peak energy window and a scatter energy window and determining a body outline of the person from at least one of the reconstructed preliminary image of the peak energy window or of the scatter energy window. The method further includes identifying a heart contour and segmenting at least the left lung. The method additionally includes defining an attenuation map based on the body outline and segmented left lung and reconstructing an image of a region of interest of the person using an iterative joint estimation reconstruction.Type: GrantFiled: March 23, 2012Date of Patent: September 16, 2014Assignee: General Electric CompanyInventors: Lana Volokh, Yaron Hefetz, Alexander Ganin, Ravindra Manjeshwar
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Patent number: 8699771Abstract: A method and apparatus are provided for reducing motion related imaging artifacts. The method includes obtaining an image data set of a region of interest in an object, obtaining a motion signal indicative of motion of the region of interest, determining at least one quiescent period of at least a portion of the motion signal, extracting image data from the image data set that is within the determined quiescent period to form an image data subset, and generating an image of the region of interest using the image data subset.Type: GrantFiled: November 19, 2009Date of Patent: April 15, 2014Assignee: General Electric CompanyInventors: Scott David Wollenweber, Alexander Ganin, Kris Filip Johan Jules Thielemans, Larry Pierce, Adam Alessio, Paul Kinahan, Chi Liu
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Patent number: 8553959Abstract: A method for correcting Positron Emission Tomography (PET) data includes adjusting a tube current generated by the CT imaging system to a second tube current value that is less than a first tube current value used to generate diagnostic quality CT images, and imaging the patient with the CT imaging system set at the second tube current value. The method also includes generating a plurality of computed tomography (CT) projection data from the CT imaging system and preprocessing the CT projection data to generate preprocessed CT projection data. The method further includes filtering the preprocessed CT projection data to reduce electronic noise to generate filtered CT projection data, and performing a minus logarithmic operation on the filtered CT projection data to generate the corrected PET data.Type: GrantFiled: March 21, 2008Date of Patent: October 8, 2013Assignee: General Electric CompanyInventors: Jiang Hsieh, James George Colsher, Albert Henry Lonn, Alexander Ganin, Jean-Baptiste Thibault
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Publication number: 20130248719Abstract: Systems and methods for attenuation compensation in nuclear medicine imaging based on emission data are provided. One method includes acquiring emission data at a plurality of energy windows for a person having administered thereto a radiopharmaceutical comprising at least one radioactive isotope. The method also includes performing a preliminary reconstruction of the acquired emission data to create one or more preliminary images of a peak energy window and a scatter energy window and determining a body outline of the person from at least one of the reconstructed preliminary image of the peak energy window or of the scatter energy window. The method further includes identifying a heart contour and segmenting at least the left lung. The method additionally includes defining an attenuation map based on the body outline and segmented left lung and reconstructing an image of a region of interest of the person using an iterative joint estimation reconstruction.Type: ApplicationFiled: March 23, 2012Publication date: September 26, 2013Applicant: General Electric CompanyInventors: Lana Volokh, Yaron Hefetz, Alexander Ganin, Ravindra Manjeshwar
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Publication number: 20130131493Abstract: A method for performing an examination of a patient using a dual-modality imaging system includes accessing a list that includes a magnetic resonance imaging (MRI) examination protocol to be used to perform a predetermined MRI examination, the examination protocol including a plurality of MRI protocol actions, receiving an input selecting at least one of the MRI protocol actions, scanning the patient using the MRI examination protocol, scanning the patient using a positron emission tomography (PET) imaging system to acquire PET data, and marking the PET data, using a first visual indication, to indicate the selected MRI protocol action. An imaging system and a non-transitory computer readable medium are also described herein.Type: ApplicationFiled: November 22, 2011Publication date: May 23, 2013Applicant: GENERAL ELECTRIC COMPANYInventors: Scott David Wollenweber, Alexander Ganin, Joan M. Hanson, William J. Bridge, Kathryn M. Littlejohn, Ling Sun
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Publication number: 20130131422Abstract: Systems and methods for communicating dose calibration information are provided. One method includes determining dose calibration information of a radiopharmaceutical at a dose calibrator. The method also includes automatically storing the dose calibration information in a memory. The method further includes communicating the stored dose calibration information to a host system.Type: ApplicationFiled: November 23, 2011Publication date: May 23, 2013Applicant: General Electric CompanyInventors: Kenneth Joseph Vosniak, Alexander Ganin, Joan Hanson, Paul Kinahan, Andrew Strickland
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Patent number: 8355551Abstract: A method and apparatus are provided for reducing motion related imaging artifacts. The method includes determining an internal motion for of two regions of the object, each region having a different level of motion, scanning the first region using a first scan protocol based on the motion, scanning a second region using a second different scan protocol based on the motion, and generating an image of the object based on the first and second regions.Type: GrantFiled: February 27, 2009Date of Patent: January 15, 2013Assignees: General Electric Company, Hammersmith Imanet Ltd.Inventors: Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Alexander Ganin, Anja Brau, Floribertus P. M. Heukensfeldt Jansen, Evren Asma, Rakesh Mullick, Ravindra Mohan Manjeshwar, Ajit Shankaranarayanan
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Publication number: 20120078089Abstract: A method for generating a hybrid imaging volume includes acquiring a Positron Emission Tomography (PET) imaging dataset of an object using a PET imaging system, the PET imaging dataset including at least one motion affected portion and at least one non-motion affected portion, identifying a motion affected portion of the PET imaging dataset, motion correcting the identified portion of the PET imaging dataset to generate a hybrid portion, and constructing a hybrid PET image volume using the hybrid portion and the at least one non-motion affected portion. A system for implementing the method is also described herein.Type: ApplicationFiled: September 23, 2010Publication date: March 29, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: SCOTT DAVID WOLLENWEBER, ALEXANDER GANIN
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Patent number: 8131044Abstract: A method for determining the effectiveness of an image transformation process includes acquiring a four-dimensional (4D) image data set, sorting the 4D image data set into separate field-of-view bins using a temporal gating system generating a plurality of deformation vectors using the sorted 4D image data set, and using the plurality of deformation vectors to generate a transformation effectiveness value that is representative of the effectiveness of the image transformation process. The method further includes acquiring a respiratory signal, calculating a power spectrum of the respiratory signal, calculating a power spectrum for each of the plurality of deformation vectors, and comparing the power spectrum of the respiratory signal to the power spectrum of the plurality of deformation vectors to generate the transformation effectiveness value.Type: GrantFiled: April 8, 2008Date of Patent: March 6, 2012Assignee: General Electric CompanyInventors: Scott David Wollenweber, Alexander Ganin, Ravindra Manjeshwar, Girishankar Gopalakrishnan, Evren Asma
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Publication number: 20120051664Abstract: Methods and systems for processing a set of images are described. In accordance with this disclosure, images are registered and an analysis is performed in view of one or more constraints (such as constraints based upon anatomical or physiological considerations). Weighting factors are determined based on the analysis. The weighting factors are used in subsequent processing of the registered (and/or unregistered) images and/or to formulate a visualization that conveys the degree of confidence in the motion estimation used in the registration process.Type: ApplicationFiled: August 31, 2010Publication date: March 1, 2012Applicant: General Electric CompanyInventors: Girishankar Gopalakrishnan, Alexander Ganin, Ravindra Mohan Majeshwar, Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Floribertus P.M. Heukensfeldt Jansen, Arunabha Shasanka Roy
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Patent number: 8098916Abstract: A system and method for image-based correction including a receiver to acquire an image from one or more data storage systems, one or more processors to determine an attenuation mismatch estimate and calculate a correction for the image based on the attenuation mismatch estimate and the image, and an output to generate an attenuation mismatch corrected image based on the correction.Type: GrantFiled: May 9, 2008Date of Patent: January 17, 2012Assignee: General Electric CompanyInventors: Kris Flip Johan Jules Thielemans, Alexander Ganin, Evren Asma, Ravindra Mohan Manjeshwar
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Publication number: 20110116695Abstract: A method and apparatus are provided for reducing motion related imaging artifacts. The method includes obtaining an image data set of a region of interest in an object, obtaining a motion signal indicative of motion of the region of interest, determining at least one quiescent period of at least a portion of the motion signal, extracting image data from the image data set that is within the determined quiescent period to form an image data subset, and generating an image of the region of interest using the image data subset.Type: ApplicationFiled: November 19, 2009Publication date: May 19, 2011Inventors: Scott David Wollenweber, Alexander Ganin, Kris Filip Johan Jules Thielemans, Larry Pierce, Adam Alessio, Paul Kinahan, Chi Liu
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Patent number: 7847552Abstract: A system and method for simultaneously acquiring PET and MR data from a subject of interest with a hybrid PET-MR scanner includes monitoring transmission times of RF and gradient coils of the MR equipment and blanking segments of the PET data stream accordingly. By excluding PET data acquired during active MR transmissions, the remaining PET data used for image reconstruction will provide improved PET image quality.Type: GrantFiled: January 10, 2007Date of Patent: December 7, 2010Assignee: General Electric CompanyInventors: Robert H. Haworth, Steven G. Ross, Charles W. Stearns, Jason A. Polzin, Alexander Ganin
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Publication number: 20100220909Abstract: A method and apparatus are provided for reducing motion related imaging artifacts. The method includes determining an internal motion for of two regions of the object, each region having a different level of motion, scanning the first region using a first scan protocol based on the motion, scanning a second region using a second different scan protocol based on the motion, and generating an image of the object based on the first and second regions.Type: ApplicationFiled: February 27, 2009Publication date: September 2, 2010Applicants: GENERAL ELECTRIC COMPANY, HAMMERSMITH IMANET LTD.,Inventors: Kris Filip Johan Jules Thielemans, Scott David Wollenweber, Alexander Ganin, Anja Brau, Floribertus P. M. Heukensfeldt Jansen, Evren Asma, Rakesh Mullick, Ravindra Mohan Manjeshwar, Ajit Shankaranarayanan
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Publication number: 20090253980Abstract: A method for determining the effectiveness of an image transformation process includes acquiring a four-dimensional (4D) image data set, sorting the 4D image data set into separate field-of-view bins using a temporal gating system generating a plurality of deformation vectors using the sorted 4D image data set, and using the plurality of deformation vectors to generate a transformation effectiveness value that is representative of the effectiveness of the image transformation process. The method further includes acquiring a respiratory signal, calculating a power spectrum of the respiratory signal, calculating a power spectrum for each of the plurality of deformation vectors, and comparing the power spectrum of the respiratory signal to the power spectrum of the plurality of deformation vectors to generate the transformation effectiveness value.Type: ApplicationFiled: April 8, 2008Publication date: October 8, 2009Applicant: General Electric CompanyInventors: Scott David Wollenweber, Alexander Ganin, Ravindra Manjeshwar, Girishankar Gopalakrishnan, Evren Asma
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Publication number: 20090238427Abstract: A method for correcting Positron Emission Tomography (PET) data includes adjusting a tube current generated by the CT imaging system to a second tube current value that is less than a first tube current value used to generate diagnostic quality CT images, and imaging the patient with the CT imaging system set at the second tube current value. The method also includes generating a plurality of computed tomography (CT) projection data from the CT imaging system and preprocessing the CT projection data to generate preprocessed CT projection data. The method further includes filtering the preprocessed CT projection data to reduce electronic noise to generate filtered CT projection data, and performing a minus logarithmic operation on the filtered CT projection data to generate the corrected PET data.Type: ApplicationFiled: March 21, 2008Publication date: September 24, 2009Applicant: General Electric CompanyInventors: Jiang Hsieh, James George Colsher, Albert Henry Lonn, Alexander Ganin, Jean-Baptiste Thibault
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Publication number: 20090110256Abstract: A system and method for image-based correction including a receiver to acquire an image from one or more data storage systems, one or more processors to determine an attenuation mismatch estimate and calculate a correction for the image based on the attenuation mismatch estimate and the image, and an output to generate an attenuation mismatch corrected image based on the correction.Type: ApplicationFiled: May 9, 2008Publication date: April 30, 2009Applicant: General Electric CompanyInventors: Kris Flip Johan Jules THIELEMANS, Alexander GANIN, Evren ASMA, Ravindra Mohan MANJESHWAR