Patents by Inventor Sarah K. Patch
Sarah K. Patch 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: 8529449Abstract: The present invention is a directed to method and system of TCT imaging whereupon data associated with unmeasured or inadmissible transducer locations is determined from data acquired at measured or admissible transducer locations. The invention analyzes measured TCT data associated with several transducer locations to provide an estimate of unmeasured data so as to complete a full data set for image reconstruction. In this regard, by measuring TCT data at many points on the surface of a hemispherical bowl or sphere in which an imaging object is placed, mathematical coefficients may be determined for the TCT data as a function of transducer location. From these coefficients, the unmeasured transducer locations may be evaluated such that data associated with the unmeasured transducer locations may be estimated and utilized for image reconstruction to improve image quality as well as improve the diagnostic sensitivities or capabilities of the TCT system.Type: GrantFiled: March 15, 2004Date of Patent: September 10, 2013Assignee: General Electric CompanyInventor: Sarah K. Patch
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Patent number: 7878976Abstract: The present invention is directed to a method and system of TCT imaging whereupon an exact inversion formula is used for reconstruction of TCT data. The present invention utilizes inversion formulae that are of the filtered backprojection and ?-filter types.Type: GrantFiled: June 9, 2004Date of Patent: February 1, 2011Assignees: General Electric Company, Ramot At Tel Aviv Univ, Ltd., Oregon State UniversityInventors: Sarah K. Patch, David Finch, Victor Palamodov
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Patent number: 7336073Abstract: The present invention is directed to a method of MR imaging whereby a k-space blade extending through a center of k-space from a subject in motion is acquired. A high-pass convolution of the k-space blade with a reference k-space blade is then determined and converted to a ? function. In-plane motion of the subject during data acquisition of the k-space is then determined from the ? function.Type: GrantFiled: November 14, 2006Date of Patent: February 26, 2008Assignees: General Electric Company, Catholic Healthcare West, California Nonprofit Public Benefit CorporationInventors: Sarah K. Patch, Michael R. Hartley, James Grant Pipe
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Patent number: 7176684Abstract: The present invention is directed to a method of MR imaging whereby a k-space blade extending through a center of k-space from a subject in motion is acquired. A high-pass convolution of the k-space blade with a reference k-space blade is then determined and converted to a ? function. In-plane motion of the subject during data acquisition of the k-space is then determined from the ? function.Type: GrantFiled: June 29, 2005Date of Patent: February 13, 2007Assignees: General Electric Company, Catholic Healthcare West, California Nonprofit Public Benefit Corporation, d/ba St. Joseph's Hospital and Medical CenterInventors: Sarah K. Patch, Michael R. Hartley, James G. Pipe
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Patent number: 6845144Abstract: To perform cone beam reconstruction by using projection data correctly corresponding to X-ray beam having passed through each pixel in the reconstruction area, data D1 is obtained which is plane projected to a plane based on projection data D0. Then, plane projection data D1 to the projection plane pp is projected to the reconstruction area in the direction of X-ray transmission to obtain back projection pixel data D2. Thereafter, back projection pixel data D2 will be added for each corresponding pixel for all views to obtain back projection data D3. The present invention provides reconstruction by device of projection data correctly corresponding to the X-ray beam having passed through the reconstruction area. Through the plane projection to a plane the operation will become simplified and faster.Type: GrantFiled: February 8, 2003Date of Patent: January 18, 2005Assignee: GE Medical Systems Global Technology Company, LLCInventors: Akihiko Nishide, Sarah K. Patch
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Publication number: 20040156469Abstract: To perform cone beam reconstruction by using projection data correctly corresponding to X-ray beam having passed through each pixel in the reconstruction area, data D1 is obtained which is plane projected to a plane based on projection data D0. Then, plane projection data D1 to the projection plane pp is projected to the reconstruction area in the direction of X-ray transmission to obtain back projection pixel data D2. Thereafter, back projection pixel data D2 will be added for each corresponding pixel for all views to obtain back projection data D3. The present invention provides reconstruction by device of projection data correctly corresponding to the X-ray beam having passed through the reconstruction area. Through the plane projection to a plane the operation will become simplified and faster.Type: ApplicationFiled: February 8, 2003Publication date: August 12, 2004Inventors: Akihiko Nishide, Sarah K. Patch
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Patent number: 6754299Abstract: A method for reconstructing an image of an object utilizing a computed tomographic (CT) imaging system is provided. The CT system includes a radiation source and a multislice detector array on a rotating gantry, with the radiation source configured to project a beam of radiation through an object and towards. the multislice detector array. The multislice detector array is configured to sense attenuation of the radiation passing through the object. The method for reconstructing an image includes helically scanning an object with a computed tomographic imaging system to acquire a plurality of views of projection data at a plurality of gantry angles and a plurality of cone angles, generating a plurality of cone angle dependent weights that are inversely correlated to an absolute value of a cone angle, and weighting the projection data using the cone angle dependent weights.Type: GrantFiled: August 2, 2002Date of Patent: June 22, 2004Assignee: GE Medical Systems Global Technology Company, LLCInventor: Sarah K. Patch
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Patent number: 6703835Abstract: A method for processing digital images includes acquiring a phase difference image which includes one or more phase wraps, creating a modulated phase difference image from the phase difference image, comparing the modulated phase difference image to the phase difference image to locate areas in the phase difference image to be unwrapped, and unwrapping the phase difference image based on the areas located in the comparing step. The unwrapping step is performed by replacing wrapped pixels in the phase difference image with pixels in the modulated phase difference image plus an integer multiple of &pgr;. The integer multiplier is computed by comparing overlapping pixels in the image segments. This has a smoothing effect causing the wrapped pixels in the phase difference image to become unwrapped. As a result of this pixel replacement process, an image of improved quality and information content is produced compared with conventional methods.Type: GrantFiled: April 11, 2002Date of Patent: March 9, 2004Assignee: GE Medical Systems Global Technology Co. LLCInventors: Sarah K. Patch, Tejaswini Shubhachint, Graeme C. McKinnon, Sandhya Parameswaran, Joseph K. Maier
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Publication number: 20040022365Abstract: A method for reconstructing an image of an object utilizing a computed tomographic (CT) imaging system is provided. The CT system includes a radiation source and a multislice detector array on a rotating gantry, with the radiation source configured to project a beam of radiation through an object and towards the multislice detector array. The multislice detector array is configured to sense attenuation of the radiation passing through the object. The method for reconstructing an image includes helically scanning an object with a computed tomographic imaging system to acquire a plurality of views of projection data at a plurality of gantry angles and a plurality of cone angles, generating a plurality of cone angle dependent weights that are inversely correlated to an absolute value of a cone angle, and weighting the projection data using the cone angle dependent weights.Type: ApplicationFiled: August 2, 2002Publication date: February 5, 2004Inventor: Sarah K. Patch
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Publication number: 20030193335Abstract: A method for processing digital images includes acquiring a phase difference image which includes one or more phase wraps, creating a modulated phase difference image from the phase difference image, comparing the modulated phase difference image to the phase difference image to locate areas in the phase difference image to be unwrapped, and unwrapping the phase difference image based on the areas located in the comparing step. The unwrapping step is performed by replacing wrapped pixels in the phase difference image with pixels in the modulated phase difference image plus an integer multiple of &pgr;. The integer multiplier is computed by comparing overlapping pixels in the image segments. This has a smoothing effect causing the wrapped pixels in the phase difference image to become unwrapped. As a result of this pixel replacement process, an image of improved quality and information content is produced compared with conventional methods.Type: ApplicationFiled: April 11, 2002Publication date: October 16, 2003Inventors: Sarah K. Patch, Tejaswini Shubhachint, Graeme C. McKinnon, Sandhya Parameswaran, Joseph K. Maier
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Patent number: 6459754Abstract: The present invention is, in one embodiment, a method for multi-slice, computed tomography imaging. The method includes steps of moving an x-ray source through a trajectory; projecting an x-ray cone beam from the moving x-ray source through an object towards a curved detector; and determining contributions of segments along the trajectory to voxels in a reconstruction volume of the object, including compensating the determined contributions for curvature of the detector and x-ray cone beam geometry.Type: GrantFiled: October 27, 1999Date of Patent: October 1, 2002Assignee: GE Medical Systems Global Technology Company, LLCInventors: Guy M. Besson, Sarah K. Patch
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Patent number: 6292526Abstract: The present invention is in one embodiment a method of processing projection data collected in a helical scan performed along a helical trajectory relative to an object being scanned. The method includes steps of defining a coordinate system to parameterize the data and generating estimates of projection data not on the helical trajectory by solving ultrahyperbolic equations in the defined coordinate system.Type: GrantFiled: October 27, 1999Date of Patent: September 18, 2001Assignee: General Electric CompanyInventor: Sarah K. Patch