Patents by Inventor Margaret Ann Wiza
Margaret Ann Wiza 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: 10809339Abstract: Methods and systems for performing magnetic resonance diffusion weighted imaging of an object is provided. The method includes applying a plurality of diffusion gradients to a plurality of image slices of the object during a plurality of repetition times via an MRI system. A different diffusion gradient of the plurality is applied to each image slice during the same repetition time.Type: GrantFiled: March 21, 2018Date of Patent: October 20, 2020Assignee: GE PRECISION HEALTHCARE LLCInventors: Ke Li, Gaohong Wu, Eric Printz, Kenichi Kanda, Margaret Ann Wiza
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Patent number: 10310038Abstract: A method for supplying electrical power to a gradient amplifier that drives a gradient coil for a magnetic resonance imaging system is provided. The method includes predicting a gradient voltage required to drive the gradient coil for a scan based at least in part on a gradient coil model. The method further includes calculating a voltage set point for a power supply based at least in part on the predicted gradient voltage. The method further includes providing electrical power to the gradient amplifier via the power supply based at least in part on the calculated voltage set point. The gradient coil model is based at least in part on historical data acquired prior to the scan.Type: GrantFiled: May 24, 2016Date of Patent: June 4, 2019Assignee: General Electric CompanyInventors: Margaret Ann Wiza, Melissa Jean Freeman, Syed Saad Asif Ali, Douglas John Link, Michael Thomas Rose, Tanzania Samone Sewell
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Patent number: 10247795Abstract: A method that includes deriving a first power spectral density function of a signal input to a ripple cancellation filter; deriving a second power spectral density function of a signal concurrently output from the ripple cancellation filter; frequency shaping the first power spectral density according to a spectral rejection image of the ripple cancellation filter to obtain a test power spectral density; and indicating a degraded performance of the ripple cancellation filter in the event that the test and second power spectral density functions fail to match within pre-determined criteria.Type: GrantFiled: December 30, 2014Date of Patent: April 2, 2019Assignee: GENERAL ELECTRIC COMPANYInventors: Louis Martin Frigo, Melissa Jean Freeman, Margaret Ann Wiza, Douglas Link, Michael Thomas Rose, Scott Richard Weber, Andrew John Panos
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Patent number: 10141909Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.Type: GrantFiled: October 3, 2017Date of Patent: November 27, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Melissa Jean Freeman, Thomas George McFarland, Margaret Ann Wiza, Douglas Link
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Patent number: 10132852Abstract: An apparatus that includes a power amplifier; a load that is operatively connected to be electrically driven from the power amplifier; and an impedance monitor that is configured to in real-time identify a favorable segment within an output waveform of the power amplifier, model the baseline power spectral density of a load driven by the power amplifier during the identified segment of the output waveform, sample an empirical power spectral density of the load during the identified segment of the output waveform, and indicate a load fault in the event that the empirical power spectral density deviates from the baseline power spectral density beyond at least one pre-determined error criteria.Type: GrantFiled: December 30, 2014Date of Patent: November 20, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Margaret Ann Wiza, Louis Martin Frigo, Melissa Jean Freeman, Douglas Link, Michael Thomas Rose, Andrew John Panos
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Publication number: 20180284211Abstract: Methods and systems for performing magnetic resonance diffusion weighted imaging of an object is provided. The method includes applying a plurality of diffusion gradients to a plurality of image slices of the object during a plurality of repetition times via an MRI system. A different diffusion gradient of the plurality is applied to each image slice during the same repetition time.Type: ApplicationFiled: March 21, 2018Publication date: October 4, 2018Inventors: Ke Li, Gaohong Wu, Eric Printz, Kenichi Kanda, Margaret Ann Wiza
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Patent number: 10067203Abstract: The present disclosure relates possible implementations for utilizing energy storage elements in conjunction with a MRI system. Similarly, various associated control mechanisms are discussed. In certain embodiments, one or both of peak power shaving or energy backup may be facilitated by use of the energy storage elements. Certain such implementations may facilitate the use of higher-power MRI systems with an existing electrical infrastructure.Type: GrantFiled: October 9, 2015Date of Patent: September 4, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Jayanti Ganesh, Juan Antonio Sabate, Rajendra Naik, Margaret Ann Wiza, Viswanathan Kanakasabai, Michael Thomas Rose
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Patent number: 9893705Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.Type: GrantFiled: December 31, 2014Date of Patent: February 13, 2018Assignee: GENERAL ELECTRIC COMPANYInventors: Melissa Jean Freeman, Thomas George McFarland, Margaret Ann Wiza, Douglas Link
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Publication number: 20180026602Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.Type: ApplicationFiled: October 3, 2017Publication date: January 25, 2018Inventors: Melissa Jean Freeman, Thomas George McFarland, Margaret Ann Wiza, Douglas Link
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Publication number: 20170343630Abstract: A method for supplying electrical power to a gradient amplifier that drives a gradient coil for a magnetic resonance imaging system is provided. The method includes predicting a gradient voltage required to drive the gradient coil for a scan based at least in part on a gradient coil model. The method further includes calculating a voltage set point for a power supply based at least in part on the predicted gradient voltage. The method further includes providing electrical power to the gradient amplifier via the power supply based at least in part on the calculated voltage set point. The gradient coil model is based at least in part on historical data acquired prior to the scan.Type: ApplicationFiled: May 24, 2016Publication date: November 30, 2017Applicant: GENERAL ELECTRIC COMPANYInventors: MARGARET ANN WIZA, MELISSA JEAN FREEMAN, SYED SAAD ASIF ALI, DOUGLAS JOHN LINK, MICHAEL THOMAS ROSE, TANZANIA SAMONE SEWELL
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Publication number: 20170102441Abstract: The present disclosure relates possible implementations for utilizing energy storage elements in conjunction with a MRI system. Similarly, various associated control mechanisms are discussed. In certain embodiments, one or both of peak power shaving or energy backup may be facilitated by use of the energy storage elements. Certain such implementations may facilitate the use of higher-power MRI systems with an existing electrical infrastructure.Type: ApplicationFiled: October 9, 2015Publication date: April 13, 2017Inventors: Jayanti Ganesh, Juan Antonio Sabate, Rajendra Naik, Margaret Ann Wiza, Viswanathan Kanakasabai, Michael Thomas Rose
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Patent number: 9425700Abstract: A resonant power supply is disclosed. The resonant power supply includes a series resonant configured to convert an input DC voltage to an output DC voltage. The resonant power supply further comprises a converter controller coupled to the series resonant converter and configured to receive a DC voltage feedback signal measured at the output of the series resonant converter, or a resonant current feedback signal representing a resonant current flowing through the series resonant converter. The converter controller is further configured to generate control signals to be applied to the series resonant converter to limit the output DC voltage of the series resonant converter according to the DC voltage feedback signal and a predetermined voltage threshold signal, or to limit the resonant current of the series resonant converter according to the resonant current feedback signal and a predetermined current threshold signal.Type: GrantFiled: October 24, 2012Date of Patent: August 23, 2016Assignee: GENERAL ELECTRIC COMPANYInventors: Xi Lu, Tao Ma, Yimeng Shi, Pengcheng Zhu, Garron Koch Morris, Juan Antonio Sabate, Jeffrey Neal Slotnick, Wesley Michael Skeffington, Margaret Ann Wiza
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Publication number: 20160187411Abstract: An apparatus that includes a power amplifier; a load that is operatively connected to be electrically driven from the power amplifier; and an impedance monitor that is configured to in real-time identify a favorable segment within an output waveform of the power amplifier, model the baseline power spectral density of a load driven by the power amplifier during the identified segment of the output waveform, sample an empirical power spectral density of the load during the identified segment of the output waveform, and indicate a load fault in the event that the empirical power spectral density deviates from the baseline power spectral density beyond at least one pre-determined error criteria.Type: ApplicationFiled: December 30, 2014Publication date: June 30, 2016Applicant: GENERAL ELECTRIC COMPANYInventors: MARGARET ANN WIZA, LOUIS MARTIN FRIGO, MELISSA JEAN FREEMAN, DOUGLAS LINK, MICHAEL THOMAS ROSE, ANDREW JOHN PANOS
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Publication number: 20160191010Abstract: An apparatus includes a self-coupled transformer, a first band stop filter and a tank circuit connected in series with the first band stop filter between first and second windings of the self-coupled transformer. An inductor of the tank circuit acts as an out-of-phase third winding of the self-coupled transformer.Type: ApplicationFiled: December 31, 2014Publication date: June 30, 2016Applicant: GENERAL ELECTRIC COMPANYInventors: MELISSA JEAN FREEMAN, Thomas George McFarland, Margaret Ann Wiza, Douglas Link
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Publication number: 20160187444Abstract: A method that includes deriving a first power spectral density function of a signal input to a ripple cancellation filter; deriving a second power spectral density function of a signal concurrently output from the ripple cancellation filter; frequency shaping the first power spectral density according to a spectral rejection image of the ripple cancellation filter to obtain a test power spectral density; and indicating a degraded performance of the ripple cancellation filter in the event that the test and second power spectral density functions fail to match within pre-determined criteria.Type: ApplicationFiled: December 30, 2014Publication date: June 30, 2016Applicant: General Electric CompanyInventors: Louis Martin FRIGO, Melissa Jean FREEMAN, Margaret Ann WIZA, Douglas LINK, Michael Thomas ROSE, Scott Richard WEBER, Andrew John PANOS
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Patent number: 9287795Abstract: A resonant power supply is provided. The resonant power supply comprises a series resonant converter configured to convert an input DC voltage to an output DC voltage to generate an output DC voltage. The series resonant converter includes a switching stage, a resonant inductor, a resonant capacitor, and an isolation transformer. The resonant power supply further comprises a converter controller configured to obtain an actual trajectory radius signal based on a resonant inductor current, a resonant capacitor voltage, and a voltage in association with the isolation transformer. The converter controller is further configured to generate a trajectory radius command signal based on a DC voltage command signal and a DC voltage feedback signal, and to generate control signals to be applied to the switching stage based on the actual trajectory radius signal and the trajectory radius command signal.Type: GrantFiled: October 24, 2012Date of Patent: March 15, 2016Assignee: GENERAL ELECTRIC COMPANYInventors: Tao Ma, Xi Lu, Yimeng Shi, Pengcheng Zhu, Garron Koch Morris, Juan Antonio Sabate, Jeffrey Neal Slotnick, Wesley Michael Skeffington, Margaret Ann Wiza