Patents by Inventor Paul Markwardt
Paul Markwardt 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: 11172907Abstract: Methods and systems are provided for cross calibration between two or more dual energy x-ray absorptiometry (DXA) systems. In one example, a calibration phantom is scanned along with a patient during a scanning sequence, with a first system, to obtain one or more coefficients that map pixel values retrieved from a phantom image from the phantom scan to image pixel values in the reconstructed patient image from the patient scan. The one or more coefficients may be utilized to adjust and/or compare BMD values of the patient obtained when the patient is scanned with a different system utilizing a phantom with similar composition and parameters as the calibration phantom.Type: GrantFiled: February 24, 2020Date of Patent: November 16, 2021Assignee: GE Precision Healthcare LLCInventors: Pablo Milioni De Carvalho, Serge Louis Wilfrid Muller, Paul Markwardt
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Publication number: 20210259655Abstract: Methods and systems are provided for cross calibration between two or more dual energy x-ray absorptiometry (DXA) systems. In one example, a calibration phantom is scanned along with a patient during a scanning sequence, with a first system, to obtain one or more coefficients that map pixel values retrieved from a phantom image from the phantom scan to image pixel values in the reconstructed patient image from the patient scan. The one or more coefficients may be utilized to adjust and/or compare BMD values of the patient obtained when the patient is scanned with a different system utilizing a phantom with similar composition and parameters as the calibration phantom.Type: ApplicationFiled: February 24, 2020Publication date: August 26, 2021Inventors: Pablo Milioni De Carvalho, Serge Louis Wilfrid Muller, Paul Markwardt
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Patent number: 10699405Abstract: An imaging system utilizes 2D DXA images obtained in a tomographic imaging process or mode in order to provide more detailed information to the operator of the bone structure of the patient. The imaging system obtains multiple 2D DXA images at different angles with regard to the patient in a number of passes across the body of the patient. These 2D DXA images can then be utilized to reconstruct at least one 2D slice of the body of the patient, such as in a plane parallel to the plane of a patient support surface, such as a scanner table. The information provided by the tomographic reconstruction provides enhancements to the process of modifying a 3D FEA model associated to an already available set of tomographic reconstructed slices selected from the comparison with the current tomographic reconstructed slices. In this manner, the system and method provide a significant reduction in the error of the resulting modified 3D FEA model for review and analysis compared to a 2D approach.Type: GrantFiled: September 29, 2017Date of Patent: June 30, 2020Assignee: General Electric CompanyInventors: Randall Payne, Paul Markwardt, Serge Muller
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Patent number: 10499873Abstract: A system for performing a bone density scan of a patient is provided. The system includes a radiation source operative to emit a radiation beam, a radiation detector operative to receive the radiation beam and generate an output signal based at least in part on the received radiation beam, and a controller in electronic communication with the radiation source and the radiation detector and operative to generate at least one of a bone mineral content measurement of the patient, a bone mineral density measurement of the patient, a body composition measurement of the patient, and a body thickness measurement of the patient. The controller is further operative to regulate the radiation beam such that a flux of the radiation beam at the radiation detector is within a target flux range.Type: GrantFiled: December 20, 2016Date of Patent: December 10, 2019Assignee: GENERAL ELECTRIC COMPANYInventors: James Wear, Serge Muller, Randall Payne, Paul Markwardt
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Patent number: 10485502Abstract: A system for assessing muscle function of a patient is provided. The system includes: a dual-energy X-ray absorptiometry device operative to scan the patient so as to generate a lean mass measurement; a bioelectrical impedance analysis device operative to scan the patient so as to generate an extracellular water volume measurement; and a controller that includes at least one processor and a memory device, the controller in electrical communication with the dual-energy X-ray absorptiometry device and the bioelectrical impedance device. The controller is adapted to: receive the lean mass measurement and the extracellular water volume measurement; store the lean mass measurement and the extracellular water volume measurement in the memory device; and generate a muscle assessment indicator of the patient based at least in part on the lean mass measurement and the extracellular water volume measurement stored in the memory device.Type: GrantFiled: December 20, 2016Date of Patent: November 26, 2019Assignee: General Electric CompanyInventors: James Wear, Serge Muller, Randall Payne, Paul Markwardt
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Publication number: 20190102877Abstract: An imaging system utilizes 2D DXA images obtained in a tomographic imaging process or mode in order to provide more detailed information to the operator of the bone structure of the patient. The imaging system obtains multiple 2D DXA images at different angles with regard to the patient in a number of passes across the body of the patient. These 2D DXA images can then be utilized to reconstruct at least one 2D slice of the body of the patient, such as in a plane parallel to the plane of a patient support surface, such as a scanner table. The information provided by the tomographic reconstruction provides enhancements to the process of modifying a 3D FEA model associated to an already available set of tomographic reconstructed slices selected from the comparison with the current tomographic reconstructed slices. In this manner, the system and method provide a significant reduction in the error of the resulting modified 3D FEA model for review and analysis compared to a 2D approach.Type: ApplicationFiled: September 29, 2017Publication date: April 4, 2019Inventors: Randall Payne, Paul Markwardt, Serge Muller
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Publication number: 20190000407Abstract: A system for imaging includes a gantry movable relative to a subject. A source is configured to emit radiation during an imaging procedure. A detector is configured to receive attenuated radiation from the source during an imaging procedure, at least one of the source and the detector movably secured to the gantry by an adjustable joint. An imaging controller is operably connected to at least the gantry and to the adjustable joint, wherein the gantry controller receives a priori patient information and imaging system geometry information, the imaging controller determines an imaging geometry and operates the gantry and the adjustable joint to vary a source to image-receptor distance (SID) according to the imaging geometry.Type: ApplicationFiled: June 30, 2017Publication date: January 3, 2019Applicant: General Electric CompanyInventors: Serge Muller, Paul Markwardt, James Wear, Randall Payne
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Publication number: 20180168530Abstract: A system for assessing muscle function of a patient is provided. The system includes: a dual-energy X-ray absorptiometry device operative to scan the patient so as to generate a lean mass measurement; a bioelectrical impedance analysis device operative to scan the patient so as to generate an extracellular water volume measurement; and a controller that includes at least one processor and a memory device, the controller in electrical communication with the dual-energy X-ray absorptiometry device and the bioelectrical impedance device. The controller is adapted to: receive the lean mass measurement and the extracellular water volume measurement; store the lean mass measurement and the extracellular water volume measurement in the memory device; and generate a muscle assessment indicator of the patient based at least in part on the lean mass measurement and the extracellular water volume measurement stored in the memory device.Type: ApplicationFiled: December 20, 2016Publication date: June 21, 2018Applicant: GENERAL ELECTRIC COMPANYInventors: JAMES WEAR, SERGE MULLER, RANDALL PAYNE, PAUL MARKWARDT
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Publication number: 20180168533Abstract: A system for performing a bone density scan of a patient is provided. The system includes a radiation source operative to emit a radiation beam, a radiation detector operative to receive the radiation beam and generate an output signal based at least in part on the received radiation beam, and a controller in electronic communication with the radiation source and the radiation detector and operative to generate at least one of a bone mineral content measurement of the patient, a bone mineral density measurement of the patient, a body composition measurement of the patient, and a body thickness measurement of the patient. The controller is further operative to regulate the radiation beam such that a flux of the radiation beam at the radiation detector is within a target flux range.Type: ApplicationFiled: December 20, 2016Publication date: June 21, 2018Applicant: GENERAL ELECTRIC COMPANYInventors: JAMES WEAR, SERGE MULLER, RANDALL PAYNE, PAUL MARKWARDT
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Patent number: 8295570Abstract: Methods and apparatus for measuring body circumference are provided. One method includes acquiring dual-energy two-dimensional (2D) scan information from a dual-energy x-ray scan of a body and generating a dual-energy image of the body using the 2D scan information. The method further includes determining a circumference of at least one portion of the body based on the dual-energy scan information and the generated dual-energy image.Type: GrantFiled: September 10, 2009Date of Patent: October 23, 2012Assignee: General Electric CompanyInventors: Paul Markwardt, Randall Payne, Robert Washenko
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Patent number: 8280138Abstract: A system and method for performing skeletal age assessment is provided. The method includes scanning a hand and/or wrist of a patient using a dual-energy x-ray imaging system, acquiring density information of the hand and wrist using the scan, comparing the density information to at least one reference image, and automatically determining a skeletal age of the patient based on the comparison.Type: GrantFiled: September 10, 2009Date of Patent: October 2, 2012Assignee: General Electric CompanyInventors: Paul Markwardt, Randall Payne, David Ergun
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Publication number: 20110058725Abstract: Methods and apparatus for measuring body circumference are provided. One method includes acquiring dual-energy two-dimensional (2D) scan information from a dual-energy x-ray scan of a body and generating a dual-energy image of the body using the 2D scan information. The method further includes determining a circumference of at least one portion of the body based on the dual-energy scan information and the generated dual-energy image.Type: ApplicationFiled: September 10, 2009Publication date: March 10, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Paul Markwardt, Randall Payne, Robert Washenko
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Publication number: 20110058726Abstract: A system and method for performing skeletal age assessment is provided. The method includes scanning a hand and/or wrist of a patient using a dual-energy x-ray imaging system, acquiring density information of the hand and wrist using the scan, comparing the density information to at least one reference image, and automatically determining a skeletal age of the patient based on the comparison.Type: ApplicationFiled: September 10, 2009Publication date: March 10, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Paul Markwardt, Randall Payne, David Ergun
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Publication number: 20050096527Abstract: An x-ray densitometry system provides improved analysis of bone images taken of a patient over a course of time by comparing the images to deduce positioning errors and/or to correct positioning errors for improved quantitative assessment of the bone.Type: ApplicationFiled: October 25, 2004Publication date: May 5, 2005Inventors: Scott Zeller, Grant Stevens, Paul Markwardt, Russell Nord, Robert Washenko, David Ergun