Patents by Inventor Paul F. Stetson
Paul F. Stetson 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: 8571621Abstract: Methods and systems are provided for filtering a pulse oximetry signal without making assumptions on the noise statistics of the signal. A pulse oximeter may receive an energy signal proportional to an amount of light detected at the sensor. The energy signal may be converted and digitally processed to estimate physiological data. The pulse oximeter may include a processor configured to execute H? filtering algorithms to estimate physiological data without requiring the variances and/or distributions of measurement and process noise in the signal. In one or more embodiments, the pulse oximeter may also be configured to execute other filtering algorithms which update H? filtering algorithms based on the pulse oximetry signal.Type: GrantFiled: June 24, 2010Date of Patent: October 29, 2013Assignee: Covidien LPInventors: Paul F. Stetson, James Ochs
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Publication number: 20130281841Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.Type: ApplicationFiled: March 6, 2013Publication date: October 24, 2013Inventors: Matthew J. EVERETT, Scott A. MEYER, Paul F. STETSON, Yan ZHOU
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Publication number: 20130229621Abstract: Embodiments of the present invention provide methods for finding the lateral position of the fovea in an OCT image volume. In one instance, a cost function is developed whose minimum is located at or near the foveal center. This cost function includes one or more measures of retinal layer thickness and/or measures of distance from blood vessels or a priori locations.Type: ApplicationFiled: August 20, 2012Publication date: September 5, 2013Applicant: Carl Zeiss Meditec, Inc.Inventors: Paul F. Stetson, Homayoun Bagherinia
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Patent number: 8416991Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.Type: GrantFiled: June 4, 2012Date of Patent: April 9, 2013Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Scott A. Meyer, Paul F. Stetson, Yan Zhou
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Patent number: 8332016Abstract: The present invention improves projection displays of volume data. Using the Minimum Intensity Projection (MinIP), fluid filled regions or other regions of hyporeflective tissue are displayed. By limiting the projection to partial volumes within the volume, differences in the scattering intensity within specific regions are isolated. In this way, hyperreflectivity of weakly scattering tissue can be assessed.Type: GrantFiled: August 4, 2009Date of Patent: December 11, 2012Assignee: Carl Zeiss Meditec, Inc.Inventor: Paul F. Stetson
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Publication number: 20120308108Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.Type: ApplicationFiled: June 4, 2012Publication date: December 6, 2012Applicant: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Scott A. Meyer, Paul F. Stetson, Yan Zhou
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Publication number: 20120274898Abstract: Systems and methods for classifying abnormalities within optical coherence tomography images of the eye are presented. One embodiment of the present invention is the classification of pigment epithelial detachments (PEDs) based on characteristics of their internal reflectivity, size and shape. The classification can be based on selected subsets of the data located within or surrounding the abnormalities. Training data can be used to generate the classification scheme and the classification can be weighted to highlight specific classes of particular clinical interest.Type: ApplicationFiled: April 26, 2012Publication date: November 1, 2012Inventors: SriniVas R. Sadda, Paul F. Stetson
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Patent number: 8251511Abstract: Embodiments of the present invention provide methods for finding the lateral position of the fovea in an OCT image volume. In one instance, a cost function is developed whose minimum is located at or near the foveal center. This cost function includes one or more measures of retinal layer thickness and/or measures of distance from blood vessels or a priori locations.Type: GrantFiled: November 18, 2011Date of Patent: August 28, 2012Assignee: Carl Zeiss Meditec, Inc.Inventors: Paul F. Stetson, Homayoun Bagherinia
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Patent number: 8208688Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.Type: GrantFiled: October 27, 2011Date of Patent: June 26, 2012Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Scott A. Meyer, Paul F. Stetson, Yan Zhou
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Publication number: 20120075584Abstract: Various methods are disclosed for mapping optical coherence tomography (OCT) data to facilitate review and diagnosis. In one aspect, high resolution 2D line scans are obtained along with lower density 3D cube scans and displayed in a manner to provide context to the clinician. In another aspect, OCT data is analyzed to provide information about non-uniformities of the tissue. Binary image maps of maps useful for determining tautness of membranes are also disclosed.Type: ApplicationFiled: September 22, 2011Publication date: March 29, 2012Applicant: Carl Zeiss Meditec, Inc.Inventor: Paul F. STETSON
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Publication number: 20120062841Abstract: Embodiments of the present invention provide methods for finding the lateral position of the fovea in an OCT image volume. In one instance, a cost function is developed whose minimum is located at or near the foveal center. This cost function includes one or more measures of retinal layer thickness and/or measures of distance from blood vessels or a priori locations.Type: ApplicationFiled: November 18, 2011Publication date: March 15, 2012Applicant: Carl Zeiss Meditec, Inc.Inventors: Paul F. STETSON, Homayoun Bagherinia
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Patent number: 8128229Abstract: One embodiment of the present invention accounts for individual anatomical variation when evaluating optical nerve fiber measurements. In one aspect, contextual information is used to compensate or correct measurement data. In another aspect, reference coordinates are remapped for improved comparison or visualization. In one embodiment of this latter aspect, the method uses measurements of nerve fiber capacity and maps of nerve fiber retinal service to improve sensitivity and specificity in eye function metrics. In one instance, we use the birefringence of nerve fibers to determine the orientation of the fibers within the RNFL. Orientation of the fibers about the ONH is indicative of the service provided by the fibers and is used to improve the interpretation of thickness measurements of the nerve fiber layer. Normalized nerve fiber measurements about the optic nerve head improve specificity and sensitivity as compared to the standard model.Type: GrantFiled: August 19, 2010Date of Patent: March 6, 2012Assignee: Carl Zeis Meditec, Inc.Inventors: Scott A. Meyer, Mary K. Durbin, Paul F. Stetson, Bagrat Amirbekian
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Publication number: 20120045101Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.Type: ApplicationFiled: October 27, 2011Publication date: February 23, 2012Applicant: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Scott A. Meyer, Paul F. Stetson, Yan Zhou
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Patent number: 8079711Abstract: Embodiments of the present invention provide methods for finding the lateral position of the fovea in an OCT image volume. In one instance, a cost function is developed whose minimum is located at or near the foveal center. This cost function includes one or more measures of retinal layer thickness and/or measures of distance from blood vessels or a priori locations.Type: GrantFiled: March 31, 2009Date of Patent: December 20, 2011Assignee: Carl Zeiss Meditec, Inc.Inventors: Paul F. Stetson, Homayoun Bagherinia
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Patent number: 8073202Abstract: The present invention discloses a method for generating elevation maps or images of a tissue layer/boundary with respect to a fitted reference surface, comprising the steps of finding and segmenting a desired tissue layer/boundary; fitting a smooth reference surface to the segmented tissue layer/boundary; calculating elevations of the same or other tissue layer/boundary relative to the fitted reference surface; and generating maps of elevation relative to the fitted surface. The elevation can be displayed in various ways including three-dimensional surface renderings, topographical contour maps, contour maps, en-face color maps, and en-face grayscale maps. The elevation can also be combined and simultaneously displayed with another tissue layer/boundary dependent set of image data to provide additional information for diagnostics.Type: GrantFiled: February 19, 2010Date of Patent: December 6, 2011Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Scott A. Meyer, Paul F. Stetson, Yan Zhou
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Patent number: 8045176Abstract: Various methods are disclosed for mapping optical coherence tomography (OCT) data to facilitate review and diagnosis. In one aspect, high resolution 2D line scans are obtained along with lower density 3D cube scans and displayed in a manner to provide context to the clinician. In another aspect, OCT data is analyzed to provide information about non-uniformities of the tissue. Binary image maps of maps useful for determining tautness of membranes are also disclosed.Type: GrantFiled: June 23, 2010Date of Patent: October 25, 2011Assignee: Carl Zeiss Meditec, Inc.Inventors: Matthew J. Everett, Paul F. Stetson, Scott A. Meyer, Shahram Shawn Dastmalchi
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Publication number: 20110071374Abstract: Methods and systems are provided for filtering a pulse oximetry signal without making assumptions on the noise statistics of the signal. A pulse oximeter may receive an energy signal proportional to an amount of light detected at the sensor. The energy signal may be converted and digitally processed to estimate physiological data. The pulse oximeter may include a processor configured to execute H? filtering algorithms to estimate physiological data without requiring the variances and/or distributions of measurement and process noise in the signal. In one or more embodiments, the pulse oximeter may also be configured to execute other filtering algorithms which update H? filtering algorithms based on the pulse oximetry signal.Type: ApplicationFiled: June 24, 2010Publication date: March 24, 2011Applicant: Nellcor Puritan Bennett LLCInventors: Paul F. Stetson, James Ochs
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Publication number: 20110063573Abstract: One embodiment of the present invention accounts for individual anatomical variation when evaluating optical nerve fiber measurements. In one aspect, contextual information is used to compensate or correct measurement data. In another aspect, reference coordinates are remapped for improved comparison or visualization. In one embodiment of this latter aspect, the method uses measurements of nerve fiber capacity and maps of nerve fiber retinal service to improve sensitivity and specificity in eye function metrics. In one instance, we use the birefringence of nerve fibers to determine the orientation of the fibers within the RNFL. Orientation of the fibers about the ONH is indicative of the service provided by the fibers and is used to improve the interpretation of thickness measurements of the nerve fiber layer. Normalized nerve fiber measurements about the optic nerve head improve specificity and sensitivity as compared to the standard model.Type: ApplicationFiled: August 19, 2010Publication date: March 17, 2011Applicant: Carl Zeiss Meditec, Inc.Inventors: Scott A. MEYER, Mary K. Durbin, Paul F. Stetson, Bagrat Amirbekian
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Publication number: 20110034803Abstract: The present invention improves projection displays of volume data. Using the Minimum Intensity Projection (MinIP), fluid filled regions or other regions of hyporeflective tissue are displayed. By limiting the projection to partial volumes within the volume, differences in the scattering intensity within specific regions are isolated. In this way, hyperreflectivity of weakly scattering tissue can be assessed.Type: ApplicationFiled: August 4, 2009Publication date: February 10, 2011Applicant: Carl Zeiss Meditec, Inc.Inventor: Paul F. STETSON
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Publication number: 20100278402Abstract: Various methods are disclosed for mapping optical coherence tomography (OCT) data to facilitate review and diagnosis. In one aspect, high resolution 2D line scans are obtained along with lower density 3D cube scans and displayed in a manner to provide context to the clinician. In another aspect, QCT data is analyzed to provide information about non-uniformities of the tissue. Binary image maps of maps useful for determining tautness of membranes are also disclosed.Type: ApplicationFiled: June 23, 2010Publication date: November 4, 2010Applicant: Carl Zeiss Meditec, Inc.Inventors: Matthew J. EVERETT, Paul F. STETSON, Scott A. MEYER, Shahram Shawn DASTMALCHI