Patents by Inventor Harlan M. Romsdahl
Harlan M. Romsdahl 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: 7633501Abstract: A computer-aided diagnostic method and system provide image annotation information that can include an assessment of the probability, likelihood or predictive value of detected or identified suspected abnormalities as an additional aid to the radiologist. More specifically, probability values, in numerical form and/or analog form, are added to the locational markers of the detected and suspected abnormalities. The task of a physician using such a system as disclosed is believed to be made easier by displaying markers representing different regions of interest.Type: GrantFiled: May 22, 2006Date of Patent: December 15, 2009Assignee: MeVis Medical Solutions, Inc.Inventors: Susan A. Wood, Heidi Zhang, Anat Caspi, Takeshi Doi, Harlan M. Romsdahl
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Patent number: 7463760Abstract: An algorithm is quickly scans a digital image volume to detect density nodules. A first stage is based on a transform to quickly highlight regions requiring further processing. The first stage operates with somewhat lower sensitivity than is possible with more detailed analyses, but operates to highlight regions for further analysis and processing. The transform dynamically adapts to various nodule sizes through the use of radial zones. A second stage uses a detailed gradient distribution analysis that only operates on voxels that pass a threshold of the first stage.Type: GrantFiled: July 12, 2007Date of Patent: December 9, 2008Assignee: Mevis Medical Solutions, Inc.Inventors: Harlan M. Romsdahl, Wei Zhang, Alexander C. Schneider
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Patent number: 7286695Abstract: An algorithm is quickly scans a digital image volume to detect density nodules. A first stage is based on a transform to quickly highlight regions requiring further processing. The first stage operates with somewhat lower sensitivity than is possible with more detailed analyses, but operates to highlight regions for further analysis and processing. The transform dynamically adapts to various nodule sizes through the use of radial zones. A second stage uses a detailed gradient distribution analysis that only operates on voxels that pass a threshold of the first stage.Type: GrantFiled: March 23, 2005Date of Patent: October 23, 2007Assignee: R2 Technology, Inc.Inventors: Harlan M. Romsdahl, Wei Zhang, Alexander C. Schneider
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Patent number: 7072501Abstract: A computer-aided diagnostic method and system provide image annotation information that can include an assessment of the probability, likelihood or predictive value of detected or identified suspected abnormalities as an additional aid to the radiologist. More specifically, probability values, in numerical form and/or analog form, are added to the locational markers of the detected and suspected abnormalities. The task of a physician using such a system as disclosed is believed to be made easier by displaying markers representing different regions of interest.Type: GrantFiled: September 30, 2002Date of Patent: July 4, 2006Assignee: R2 Technology, Inc.Inventors: Susan A. Wood, Heidi Zhang, Anat Caspi, Takeshi Doi, Harlan M. Romsdahl
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Patent number: 6925200Abstract: A computer-aided diagnostic method and system provide image annotation information that can include an assessment of the probability, likelihood or predictive value of detected or identified suspected abnormalities as an additional aid to the radiologist. More specifically, probability values, in numerical form and/or analog form, are added to the locational markers of the detected and suspected abnormalities. The task of a physician using such a system as disclosed is believed to be made easier by displaying markers representing different regions of interest.Type: GrantFiled: November 21, 2001Date of Patent: August 2, 2005Assignee: R2 Technology, Inc.Inventors: Susan A. Wood, Heidi Zhang, Anat Caspi, Takeshi Doi, Harlan M. Romsdahl
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Patent number: 6909797Abstract: An algorithm is quickly scans a digital image volume to detect density nodules. A first stage is based on a transform to quickly highlight regions requiring further processing. The first stage operates with somewhat lower sensitivity than is possible with more detailed analyses, but operates to highlight regions for further analysis and processing. The transform dynamically adapts to various nodule sizes through the use of radial zones. A second stage uses a detailed gradient distribution analysis that only operates on voxels that pass a threshold of the first stage.Type: GrantFiled: November 23, 2001Date of Patent: June 21, 2005Assignee: R2 Technology, Inc.Inventors: Harlan M. Romsdahl, Wei Zhang, Alexander C. Schneider
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Patent number: 6640001Abstract: A method and apparatus for the fast detection of spiculated lesions in a digital mammogram, the method for use in a computer aided diagnosis system for assisting a radiologist in identifying and recognizing the spiculations among a multiplicity of lines corresponding to standard fibrous breast tissue. A line and direction image is created from a digital mammogram, and a region of potential intersection for substantially every pixel in the digital mammogram image is determined. The region of potential intersection for each pixel is a predetermined pattern, such as a high aspect ratio rectangle or trapezoid, positioned around the pixel and rotated in a direction corresponding to direction information for that pixel. The regions of potential intersection are accumulated among the pixels to produce a cumulative array, and information in the cumulative array is processed for identifying spiculations in the digital mammogram.Type: GrantFiled: July 17, 2001Date of Patent: October 28, 2003Assignee: R2 Technology, Inc.Inventors: Jimmy R. Roehrig, Harlan M. Romsdahl, Wei Zhang
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Publication number: 20030095697Abstract: A computer-aided diagnostic method and system provide image annotation information that can include an assessment of the probability, likelihood or predictive value of detected or identified suspected abnormalities as an additional aid to the radiologist. More specifically, probability values, in numerical form and/or analog form, are added to the locational markers of the detected and suspected abnormalities. The task of a physician using such a system as disclosed is believed to be made easier by displaying markers representing different regions of interest.Type: ApplicationFiled: September 30, 2002Publication date: May 22, 2003Inventors: Susan A. Wood, Heidi Zhang, Anat Caspi, Takeshi Doi, Harlan M. Romsdahl
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Publication number: 20020141627Abstract: An algorithm is quickly scans a digital image volume to detect density nodules. A first stage is based on a transform to quickly highlight regions requiring further processing. The first stage operates with somewhat lower sensitivity than is possible with more detailed analyses, but operates to highlight regions for further analysis and processing. The transform dynamically adapts to various nodule sizes through the use of radial zones. A second stage uses a detailed gradient distribution analysis that only operates on voxels that pass a threshold of the first stage.Type: ApplicationFiled: November 23, 2001Publication date: October 3, 2002Inventors: Harlan M. Romsdahl, Wei Zhang, Alexander C. Schneider
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Publication number: 20020097902Abstract: A computer-aided diagnostic (CAD) method and system provide image annotation information that can include an assessment of the probability, likelihood or predictive value of the CAD-detected suspected abnormalities as an additional aid to the radiologist. More specifically, probability values, in numerical form and/or analog form, are added to the locational markers of the CAD-detected suspected abnormalities. The task of a physician using a CAD system is believed to be made easier by displaying two different markers representing different probability thresholds. An additional threshold can be used to display “extra view markers” as an additional aid or guide to the radiologic technician to take extra views of a patient before the patient is released or discharged. A control device is added to allow the user to select and vary the probability threshold for the display of locational markers.Type: ApplicationFiled: November 21, 2001Publication date: July 25, 2002Inventors: Jimmy R. Roehrig, Shih-Ping Wang, Susan A. Wood, Harlan M. Romsdahl, Julian Marshall, Sandra Stapleton
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Publication number: 20020070970Abstract: A computer-aided diagnostic method and system provide image annotation information that can include an assessment of the probability, likelihood or predictive value of detected or identified suspected abnormalities as an additional aid to the radiologist. More specifically, probability values, in numerical form and/or analog form, are added to the locational markers of the detected and suspected abnormalities. The task of a physician using such a system as disclosed is believed to be made easier by displaying markers representing different regions of interest.Type: ApplicationFiled: November 21, 2001Publication date: June 13, 2002Inventors: Susan A. Wood, Heidi Zhang, Anat Caspi, Takeshi Doi, Harlan M. Romsdahl
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Publication number: 20020003894Abstract: A method and apparatus for the fast detection of spiculated lesions in a digital mammogram, the method for use in a computer aided diagnosis system for assisting a radiologist in identifying and recognizing the spiculations among a multiplicity of lines corresponding to standard fibrous breast tissue. A line and direction image is created from a digital mammogram, and a region of potential intersection for substantially every pixel in the digital mammogram image is determined. The region of potential intersection for each pixel is a predetermined pattern, such as a high aspect ratio rectangle or trapezoid, positioned around the pixel and rotated in a direction corresponding to direction information for that pixel. The regions of potential intersection are accumulated among the pixels to produce a cumulative array, and information in the cumulative array is processed for identifying spiculations in the digital mammogram.Type: ApplicationFiled: July 17, 2001Publication date: January 10, 2002Applicant: R2 TECHNOLOGY, INC.Inventors: Jimmy R. Roehrig, Harlan M. Romsdahl, Wei Zhang
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Patent number: 6263092Abstract: A method and apparatus for the fast detection of spiculated lesions in a digital mammogram, the method for use in a computer aided diagnosis system for assisting a radiologist in identifying and recognizing the spiculations among a multiplicity of lines corresponding to standard fibrous breast tissue. A line and direction image is created from a digital mammogram, and a region of potential intersection for substantially every pixel in the digital mammogram image is determined. The region of potential intersection for each pixel is a predetermined pattern, such as a high aspect ratio rectangle or trapezoid, positioned around the pixel and rotated in a direction corresponding to direction information for that pixel. The regions of potential intersection are accumulated among the pixels to produce a cumulative array, and information in the cumulative array is processed for identifying spiculations in the digital mammogram.Type: GrantFiled: June 23, 1998Date of Patent: July 17, 2001Assignee: R2 Technology, Inc.Inventors: Jimmy R. Roehrig, Harlan M. Romsdahl, Wei Zhang
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Patent number: 6014452Abstract: A method an system for using a local attention threshold to aid in the detection of clustered abnormalities in digitized medical images is disclosed. The local attention threshold is applied to locate spots within a predetermined distance from previously identified spots. More specifically, seed pixels are identified by applying a first seed threshold function to the output of a shift-invariant neural network and adaptive threshold. The seed pixels are then segmented into spots by applying a segmentation threshold function to each seed pixel. False-positive spots are removed using various techniques. Additional seed pixels are then identified by applying a local attention threshold to pixels within a predetermined distance to previously identified spots. The local attention threshold disclosed is less selective for pixels which are closer to the nearest spot than for pixels which are further from the nearest spot.Type: GrantFiled: July 28, 1997Date of Patent: January 11, 2000Assignee: R2 Technology, Inc.Inventors: Wei Zhang, Harlan M. Romsdahl, Jimmy R. Roehrig
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Patent number: 5917929Abstract: A user interface for facilitating the input of films into a computer-aided diagnosis system is disclosed. The user interface includes a scanner which receives and scans the film-based images, and a film feeder which holds and transports them to the scanner. A touch sensitive display screen is provided to display status information to and receive instructions from an operator. The display screen displays miniature images of the films having color-coded borders so that the operator monitors the processing of the films. The interface also includes a bar code reader and allow the operator to conduct procedures for testing the scanner.Type: GrantFiled: July 23, 1996Date of Patent: June 29, 1999Assignee: R2 Technology, Inc.Inventors: Julian Marshall, Harlan M. Romsdahl, Ewout A. Mante
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Patent number: 5815591Abstract: A method and apparatus for the fast detection of spiculated lesions in a digital mammogram, the method for use in a computer aided diagnosis system for assisting a radiologist in identifying and recognizing the spiculations among a multiplicity of lines corresponding to standard fibrous breast tissue. A line and direction image is created from a digital mammogram, and a region of potential intersection for substantially every pixel in the digital mammogram image is determined. The region of potential intersection for each pixel is a predetermined pattern, such as a high aspect ratio rectangle or trapezoid, positioned around the pixel and rotated in a direction corresponding to direction information for that pixel. The regions of potential intersection are accumulated among the pixels to produce a cumulative array, and information in the cumulative array is processed for identifying spiculations in the digital mammogram.Type: GrantFiled: July 10, 1996Date of Patent: September 29, 1998Assignee: R2 Technology, Inc.Inventors: Jimmy R. Roehrig, Harlan M. Romsdahl, Wei Zhang