Patents by Inventor Bjorn Olstad

Bjorn Olstad 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).

  • Publication number: 20050228254
    Abstract: An anatomic structure is detected based on a medical diagnostic imaging data set. The anatomic structure comprises at least two different types of tissue. At least one anatomic landmark is identified within the data set, the data set is overlaid with a contour template, and a search region of the data set surrounding the contour template is scanned to identify transition points associated with a predefined characteristic of the anatomic structure.
    Type: Application
    Filed: April 13, 2004
    Publication date: October 13, 2005
    Inventors: Anders Torp, Stein Rabben, Bjorn Olstad
  • Publication number: 20050203390
    Abstract: An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. An ultrasound acquisition technique that allows a high frame rate in tissue velocity imaging or strain rate imaging is employed. With this acquisition technique the same ultrasound pulses are used for the tissue image and the Doppler based image. A sliding window technique is used for processing. The tissue deformation parameter strain is also determined by an accumulation of strain rate estimates for consecutive frames over an interval. The interval may be a triggered interval generated by, for example, an R-wave in an ECG trace. The strain calculation may be improved by moving the sample volume from which the strain rate is accumulated from frame-to-frame according to the relative displacement of the tissue within the original sample volume. The relative displacement of the tissue is determined by the instantaneous tissue velocity of the sample volume.
    Type: Application
    Filed: November 10, 2003
    Publication date: September 15, 2005
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Patent number: 6863655
    Abstract: An ultrasound machine that generates a pattern of indicia corresponding to tracked moving structure, such as a cardiac wall tissue that is displayed on a monitor. The pattern of indicia is generated by displaying a set of tagging symbols related to the tracked movement of the structure over a time period by an apparatus comprising a front-end that generates received signals in response to backscattered ultrasound waves. A Doppler processor generates a spatial set of signals values representing movement within the structure. A non-Doppler processor generates a set of parameter signals representing a spatial set of B-mode values within the structure. A host processor embodies a tracking function to generate a set of tracked movement parameter profiles and motion parameter profiles over a time period corresponding to anatomical locations associated with the set of tagging symbols.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: March 8, 2005
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Publication number: 20050010098
    Abstract: A knowledge based diagnostic imaging system, comprising diagnostic equipment for analyzing a patient to obtain a new patient data set containing at least one of MR data, CT data, ultrasound data, x-ray data, SPECT data and PET data. The diagnostic equipment automatically analyzes the new patient data set with respect to a physiologic parameter of the patient to obtain a patient value for said physiologic parameter. A database containing past patient data sets for previously analyzed patients. The past patient data sets contain data indicative of the physiologic parameter with respect to previously analyzed patients. A network interconnects the diagnostic equipment and the database to support access to the past patient data sets.
    Type: Application
    Filed: March 26, 2004
    Publication date: January 13, 2005
    Inventors: Sigmund Frigstad, Bjorn Olstad
  • Publication number: 20040249281
    Abstract: An ultrasound machine is disclosed that includes a method and apparatus for generating an image responsive to moving cardiac structure, and for extracting wall function information relative to anatomical landmarks located within the heart. At least one processor is responsive to signals received from the heart to locate anatomical landmarks within the cardiac structure and generate position information of the anatomical landmarks, locate walls within the heart relative to the position information of the anatomical landmarks, and extract wall function information from the walls within the heart. The landmarks, walls, and wall function information may be displayed to a user of the ultrasound machine.
    Type: Application
    Filed: May 19, 2004
    Publication date: December 9, 2004
    Inventor: Bjorn Olstad
  • Publication number: 20040249282
    Abstract: An ultrasound machine is disclosed that includes a method and apparatus for generating an image responsive to moving cardiac structure and blood, and for extracting clinically relevant information based on anatomical landmarks located within the heart. At least one processor is responsive to signals received from the heart to locate anatomical landmarks within the cardiac structure and generate position information of the anatomical landmarks, locate clinically relevant locations within the heart based on the position information of the anatomical landmarks, and extract clinically relevant information from the clinically relevant locations within the heart. The landmarks, clinically relevant locations, and clinically relevant information may be displayed to a user of the ultrasound machine.
    Type: Application
    Filed: May 19, 2004
    Publication date: December 9, 2004
    Inventor: Bjorn Olstad
  • Publication number: 20040176687
    Abstract: An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. The tissue deformation parameter strain is determined by an accumulation of strain rate estimates for consecutive frames over an interval. The interval may be a triggered interval generated by, for example, an R-wave in an ECG trace. Three quantitative tissue deformation parameters, such as tissue velocity, tissue velocity integrals, strain rate and/or strain, may be presented as functions of time and/or spatial position for applications such as stress echo. For example, strain rate or strain values for three different stress levels may be plotted together with respect to time over a cardiac cycle. Parameters which are derived from strain rate or strain velocity, such as peak systolic wall thickening percentage, may be plotted with respect to various stress levels.
    Type: Application
    Filed: November 10, 2003
    Publication date: September 9, 2004
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Publication number: 20040116810
    Abstract: An ultrasound machine is disclosed that includes a method and apparatus for generating an image responsive to moving cardiac structure and for locating anatomical landmarks of the heart by generating received signals in response to ultrasound waves transmitted into and then backscattered from the moving cardiac structure over a time period. A processor is responsive to the received signals to generate a set of analytic parameter values representing movement of the cardiac structure over the time period and analyzes elements of the set of analytic parameter values to automatically extract position information of the anatomical landmarks. A display is arranged to overlay indicia onto the image corresponding to the position information of the anatomical landmarks. The positions of the anatomical landmarks are tracked in real-time.
    Type: Application
    Filed: December 17, 2002
    Publication date: June 17, 2004
    Inventor: Bjorn Olstad
  • Publication number: 20040111027
    Abstract: An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. A method to estimate a strain rate in any direction, not necessarily along the ultrasound beam, based on tissue velocity data from a small region of interest around a sample volume is disclosed. Quantitative tissue deformation parameters, such as tissue velocity, tissue velocity integrals, strain rate and/or strain, may be presented as functions of time and/or spatial position for applications such as stress echo. For example, strain rate or strain values for three different stress levels may be plotted together with respect to time over a cardiac cycle.
    Type: Application
    Filed: November 10, 2003
    Publication date: June 10, 2004
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Patent number: 6676599
    Abstract: An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. Tissue velocity may be estimated by filtering a received ultrasound signal at three center frequencies related to the second harmonic of the ultrasound signal, estimating a reference tissue velocity from the two signals filtered at the outside center frequencies and using the reference tissue velocity to choose a tissue velocity from tissue velocities estimated using the middle center frequency. Estimation of strain rate in any direction, not necessarily along the ultrasound beam, is disclosed. Quantitative tissue deformation parameters may be presented as functions of time and/or spatial position for applications such as stress echo. For example, strain rate or strain values for three different stress levels may be plotted together with respect to time over a cardiac cycle. Parameters derived from strain rate or strain velocity may be plotted with respect to various stress levels.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: January 13, 2004
    Assignee: G.E. Vingmed Ultrasound AS
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Patent number: 6652462
    Abstract: An ultrasound machine is disclosed that displays a color representation of moving structure, such as a cardiac wall tissue, within a region of interest on a monitor. The color representation is generated by displaying color hues corresponding to a movement parameter of the structure, such as velocity or strain rate in such a manner as to provide for quantitative visualization of movement parameter gradients. The movement parameter is mapped to the color hues by apparatus comprising a user interface that allows the user to input color band resolution and a local range of relative parameter values. A front-end generates received signals in response to ultrasound waves. A Doppler processor generates a set of parameter signals representing absolute values of the movement parameter within the structure. A set of color characteristic signals is generated by a display processor in response to the set of parameter signals and to a user-defined local range of relative parameter values.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: November 25, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC.
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Publication number: 20030149365
    Abstract: An ultrasound system and method for calculation and display of tissue deformation parameters are disclosed. An ultrasound acquisition technique that allows a high frame rate in tissue velocity imaging or strain rate imaging is employed. With this acquisition technique the same ultrasound pulses are used for the tissue image and the Doppler based image. A sliding window technique is used for processing. The tissue deformation parameter strain is also determined by an accumulation of strain rate estimates for consecutive frames over an interval. The interval may be a triggered interval generated by, for example, an R-wave in an ECG trace. The strain calculation may be improved by moving the sample volume from which the strain rate is accumulated from frame-to-frame according to the relative displacement of the tissue within the original sample volume. The relative displacement of the tissue is determined by the instantaneous tissue velocity of the sample volume.
    Type: Application
    Filed: January 22, 2002
    Publication date: August 7, 2003
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Patent number: 6592522
    Abstract: An ultrasound machine that generates a color representation of moving structure, such as cardiac wall tissue within a region of interest, and is displayed on a monitor. The color representation is generated by displaying at least one color characteristic related to a set of signal values of the structure, such as velocity or strain rate. The related feature of the set of signal values is mapped to the color characteristic by an apparatus comprising a front-end that generates received signals in response to backscattered ultrasound waves. A Doppler processor generates a set of signal values representing a spatial set of values of the moving structure. A host processor embodies a tracking function and a time integration function to generate tracked movement parameter profiles and displacement parameter values over a time period corresponding to sampled anatomical locations within the region of interest. The displacement parameter values are then mapped to color characteristic signals.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: July 15, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Patent number: 6579240
    Abstract: An ultrasound machine is disclosed that generates a color representation of moving structure, such as a cardiac wall tissue within a region of interest, and is displayed on a monitor. The color representation is generated by displaying at least one color characteristic related to a movement parameter of the structure, such as mean velocity or mean strain rate. The related feature of the movement parameter is mapped to the color characteristic by an apparatus comprising a front-end that generates received signals in response to backscattered ultrasound waves. A Doppler processor generates a set of parameter signals representing a spatial set of values of the movement parameter within the structure. A host processor embodies a tracking function and a peak-detection function to generate a set of tracked movement parameter profiles and a set of peak values of the movement parameter over a time period corresponding to anatomical locations within the region of interest.
    Type: Grant
    Filed: June 10, 2002
    Date of Patent: June 17, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Patent number: 6537217
    Abstract: A method is provided to simultaneously acquire two ultrasound images. A first set of ultrasound pulses are transmitted at a first frame rate utilizing a first mode of operation. The echoes from the first set of ultrasound pulses are received. A second set of ultrasound pulses are transmitted at a second frame rate utilizing a second mode of operation. The first and second frame rates are different. The first set of ultrasound pulses defines an entire image, while the second set of ultrasound pulses defines a partial image. The echoes from the second set of ultrasound pulses are received, and the echoes from the first and second sets of ultrasound pulses are displayed as a single image.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: March 25, 2003
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Steinar Bjærum, Johan Kirkhorn, Hans Garmann Torp, Kjetil Viggen, Bjórn Olstad, Kjell Kristoffersen, Erik N. Steen, Dagfinn Saetre
  • Publication number: 20030045795
    Abstract: A method is provided to simultaneously acquire two ultrasound images. A first set of ultrasound pulses are transmitted at a first frame rate utilizing a first mode of operation. The echoes from the first set of ultrasound pulses are received. A second set of ultrasound pulses are transmitted at a second frame rate utilizing a second mode of operation. The first and second frame rates are different. The first set of ultrasound pulses defines an entire image, while the second set of ultrasound pulses defines a partial image. The echoes from the second set of ultrasound pulses are received, and the echoes from the first and second sets of ultrasound pulses are displayed as a single image.
    Type: Application
    Filed: August 24, 2001
    Publication date: March 6, 2003
    Inventors: Steinar Bjaerum, Johan Kirkhorn, Hans Garmann Torp, Kjetil Viggen, Bjorn Olstad, Kjell Kristoffersen, Erik N. Steen, Dagfinn Saetre
  • Patent number: 6517485
    Abstract: An ultrasound system and method for calculation and display of tissue deformation parameters, such as tissue Doppler and strain rate imaging, are disclosed. An ultrasound acquisition technique that allows a high frame rate in tissue velocity imaging or strain rate imaging is employed. With this acquisition technique the same ultrasound pulses are used for the tissue image and the Doppler based image. The number of beams used in Doppler subframes are increased to allow tissue visualization based only on Doppler subframes. A sliding window technique is used for processing.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: February 11, 2003
    Assignee: G.E. Vingmed Ultrasound AS
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Publication number: 20030013962
    Abstract: An ultrasound machine is disclosed that generates a color representation of moving structure, such as a cardiac wall tissue within a region of interest, and is displayed on a monitor. The color representation is generated by displaying at least one color characteristic related to a movement parameter of the structure, such as mean velocity or mean strain rate. The related feature of the movement parameter is mapped to the color characteristic by an apparatus comprising a front-end that generates received signals in response to backscattered ultrasound waves. A Doppler processor generates a set of parameter signals representing a spatial set of values of the movement parameter within the structure. A host processor embodies a tracking function and a peak-detection function to generate a set of tracked movement parameter profiles and a set of peak values of the movement parameter over a time period corresponding to anatomical locations within the region of interest.
    Type: Application
    Filed: June 10, 2002
    Publication date: January 16, 2003
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Publication number: 20030013964
    Abstract: An ultrasound machine that generates a pattern of indicia corresponding to tracked moving structure, such as a cardiac wall tissue that is displayed on a monitor. The pattern of indicia is generated by displaying a set of tagging symbols related to the tracked movement of the structure over a time period by an apparatus comprising a front-end that generates received signals in response to backscattered ultrasound waves. A Doppler processor generates a spatial set of signals values representing movement within the structure. A non-Doppler processor generates a set of parameter signals representing a spatial set of B-mode values within the structure. A host processor embodies a tracking function to generate a set of tracked movement parameter profiles and motion parameter profiles over a time period corresponding to anatomical locations associated with the set of tagging symbols.
    Type: Application
    Filed: June 10, 2002
    Publication date: January 16, 2003
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Publication number: 20030013957
    Abstract: An ultrasound machine is disclosed that displays a color representation of moving structure, such as a cardiac wall tissue, within a region of interest on a monitor. The color representation is generated by displaying color hues corresponding to a movement parameter of the structure, such as velocity or strain rate in such a manner as to provide for quantitative visualization of movement parameter gradients. The movement parameter is mapped to the color hues by apparatus comprising a user interface that allows the user to input color band resolution and a local range of relative parameter values. A front-end generates received signals in response to ultrasound waves. A Doppler processor generates a set of parameter signals representing absolute values of the movement parameter within the structure. A set of color characteristic signals is generated by a display processor in response to the set of parameter signals and to a user-defined local range of relative parameter values.
    Type: Application
    Filed: June 4, 2002
    Publication date: January 16, 2003
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen