Patents by Inventor C. Daniel Johnson
C. Daniel Johnson 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: 9014439Abstract: A method for displaying colonography images includes presenting a series of oblique images of the colon at sequential locations along the colon centerline. Each image is generally centered on the centerline, presents a field of view generally perpendicular to the centerline, and is oriented with the bottom of the colon down.Type: GrantFiled: January 22, 2008Date of Patent: April 21, 2015Assignee: Mayo Foundation for Medical Education and ResearchInventors: C. Daniel Johnson, Michael J. Carston, Robert J. Wentz, Armando Manduca
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Patent number: 8564593Abstract: An improved method for processing image voxel data representative of 3-dimensional images of a colon to remove the effects of tagged stool. The method uses parabolic curve intensity-gradient models at a transition between two material types as a function of the fraction of the two materials for each of a plurality of two-material type classes, including a gas-tissue transition model, a gas-stool transition model and a stool-tissue transition model. The voxels are classified into one of a plurality of substance classes including tagged stool, gas, tissue and unknown classes. The unknown class voxels are processed to classify the unknown class voxels into one of the two-material type classes. The two-material type class voxels are processed to determine the fractions of materials in each voxel. The intensity of the two-material type class voxels is then adjusted as a function of the fraction of the materials in the voxels.Type: GrantFiled: January 22, 2008Date of Patent: October 22, 2013Assignee: Mayo Foundation for Medical Education and ResearchInventors: C. Daniel Johnson, Michael J. Carston, Armando Manduca
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Patent number: 8442290Abstract: A method for processing and displaying colonography image data. First distance tissue pixels representative of tissue within a first distance of gas pixels representative of gas are processed with a first window/level setting to generate a first setting set of image pixels. Second distance tissue pixels representative of tissue within a second distance of the gas pixels are processed with a second window/level setting to generate a second setting set of image pixels. The second distance is a distance greater than the first distance. A colonography image including both the first and second setting sets of image pixels is then displayed.Type: GrantFiled: January 22, 2008Date of Patent: May 14, 2013Assignee: Mayo Foundation for Medical Education and ResearchInventors: C. Daniel Johnson, Michael J. Carston, Armando Manduca
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Publication number: 20120008841Abstract: A method for processing and displaying colonography image data. First distance tissue pixels representative of tissue within a first distance of gas pixels representative of gas are processed with a first window/level setting to generate a first setting set of image pixels. Second distance tissue pixels representative of tissue within a second distance of the gas pixels are processed with a second window/level setting to generate a second setting set of image pixels. The second distance is a distance greater than the first distance. A colonography image including both the first and second setting sets of image pixels is then displayed.Type: ApplicationFiled: January 22, 2008Publication date: January 12, 2012Applicant: MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCHInventors: C. Daniel Johnson, Michael J. Carston, Armando Manduca
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Patent number: 8031921Abstract: A method for processing CT colonography input image voxel data representative of 3-dimensional images of a colon having gas and stool tagged with stool tagging agent, to remove the stool from the images. The input image voxel data is generated by an imaging instrument having a characteristic point spread function representative of instrument blurring. The point spread function of the instrument can be empirically determined, and the image data processed as a function of the point spread function to accurately identify and remove the tagged stool. In one embodiment of the invention, portions of the image data representative of the tagged stool and colon tissue are dilated as a function of the point spread function.Type: GrantFiled: February 14, 2006Date of Patent: October 4, 2011Assignee: Mayo Foundation for Medical Education and ResearchInventors: Armando Manduca, Michael J. Carston, Robert J. Wentz, C. Daniel Johnson
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Publication number: 20100142776Abstract: A method for displaying colonography images includes presenting a series of oblique images of the colon at sequential locations along the colon centerline. Each image is generally centered on the centerline, presents a field of view generally perpendicular to the centerline, and is oriented with the bottom of the colon down.Type: ApplicationFiled: January 22, 2008Publication date: June 10, 2010Applicant: MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCHInventors: C. Daniel Johnson, Michael J. Carston, Robert J. Wentz, Armando Manduca
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Publication number: 20100142783Abstract: A method for displaying colonography images includes presenting a series of axial images of the colon at sequential locations along the colon centerline. Each image is generally centered on the centerline and presents a field of view parallel to the axial plane.Type: ApplicationFiled: January 22, 2008Publication date: June 10, 2010Applicant: MAYO FOUNDATION FOR MEDICAL EDUCATION AND RESEARCHInventors: C. Daniel Johnson, Michael J. Carston, Armando Manduca, Robert J. Wentz
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Publication number: 20100128036Abstract: An improved method for processing image voxel data representative of 3-dimensional images of a colon to remove the effects of tagged stool. The method uses parabolic curve intensity-gradient models at a transition between two material types as a function of the fraction of the two materials for each of a plurality of two-material type classes, including a gas-tissue transition model, a gas-stool transition model and a stool-tissue transition model. The voxels are classified into one of a plurality of substance classes including tagged stool, gas, tissue and unknown classes. The unknown class voxels are processed to classify the unknown class voxels into one of the two-material type classes. The two-material type class voxels are processed to determine the fractions of materials in each voxel. The intensity of the two-material type class voxels is then adjusted as a function of the fraction of the materials in the voxels.Type: ApplicationFiled: January 22, 2008Publication date: May 27, 2010Inventors: C. Daniel Johnson, Michael J. Carston, Armando Manduca
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Patent number: 7620442Abstract: A method for generating colonography images for colorectal screening of a patient. The patient is administered an amount of radiopaque stool marker which will enable stool present in the patient's colon to be distinguished from soft tissue. The patient's colon is imaged after the stool marker has been administered to generate colonography images. Preparation of the colon is simulated by processing the colonography images to remove marked stool before the images are observed during a diagnosis session.Type: GrantFiled: February 27, 2006Date of Patent: November 17, 2009Assignee: Mayo Foundation for Medical Education and ResearchInventors: C. Daniel Johnson, Matthew R. Callstrom
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Publication number: 20080273781Abstract: A method for processing CT colonography input image voxel data representative of 3-dimensional images of a colon having gas and stool tagged with stool tagging agent, to remove the stool from the images. The input image voxel data is generated by an imaging instrument having a characteristic point spread function representative of instrument blurring. The point spread function of the instrument can be empirically determined, and the image data processed as a function of the point spread function to accurately identify and remove the tagged stool. In one embodiment of the invention, portions of the image data representative of the tagged stool and colon tissue are dilated as a function of the point spread function.Type: ApplicationFiled: February 14, 2006Publication date: November 6, 2008Applicant: Mayo Foundation for Medical Education and ResearchInventors: Armando Manduca, Michael J. Carston, Robert J. Wentz, C. Daniel Johnson
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Patent number: 7440601Abstract: Portions of a virtual colon can be analyzed to identify a normal structure, such as an ileocecal valve. Paradigmatic characteristics of ileocecal valves can be used to identify a digital representation as an ileocecal valve. Upon determination that a digital representation has the characteristics of an ileocecal valve, action can be taken. For example, the digital representation can be removed from a list of polyp candidates.Type: GrantFiled: October 8, 2004Date of Patent: October 21, 2008Assignees: The United States of America as represented by the Department of Health and Human Services, Mayo Foundation for Medical Education and ResearchInventors: Ronald Summers, Jianhua Yao, C. Daniel Johnson
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Patent number: 7035681Abstract: A method for generating colonography images for colorectal screening of a patient. The patient is administered an amount of radiopaque stool marker which will enable stool present in the patient's colon to be distinguished from soft tissue. The patient's colon is imaged after the stool marker has been administered to generate colonography images. Preparation of the colon is simulated by processing the colonography images to remove marked stool before the images are observed during a diagnosis session.Type: GrantFiled: September 24, 2002Date of Patent: April 25, 2006Assignee: Mayo Foundation for Medical Education and ResearchInventors: C. Daniel Johnson, Matthew R. Callstrom
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Publication number: 20030023163Abstract: A method for generating colonography images for colorectal screening of a patient. The patient is administered an amount of radiopaque stool marker which will enable stool present in the patient's colon to be distinguished from soft tissue. The patient's colon is imaged after the stool marker has been administered to generate colonography images. Preparation of the colon is simulated by processing the colonography images to remove marked stool before the images are observed during a diagnosis session.Type: ApplicationFiled: September 24, 2002Publication date: January 30, 2003Applicant: Mayo Foundation for Medical EducationInventors: C. Daniel Johnson, Matthew R. Callstrom
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Patent number: 6477401Abstract: A method for generating colonography images for colorectal screening of a patient. The patient is administered an amount of radiopaque stool marker which will enable stool present in the patient's colon to be distinguished from soft tissue. The patient's colon is imaged after the stool marker has been administered to generate colonography images. Preparation of the colon is simulated by processing the colonography images to remove marked stool before the images are observed during a diagnosis session.Type: GrantFiled: March 10, 2000Date of Patent: November 5, 2002Assignee: Mayo Foundation for Medical Education and ResearchInventors: C. Daniel Johnson, Judd E. Reed, Matthew R. Callstrom