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: 20030013963
    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: Application
    Filed: June 10, 2002
    Publication date: January 16, 2003
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristoffersen
  • Publication number: 20020186868
    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 at least one color characteristic corresponding to a movement parameter of the structure, such as velocity or strain rate. The movement parameter is mapped to the color characteristic by apparatus comprising a front-end that generates received signals in response to ultrasound waves. A Doppler processor generates a set of parameter signals representing values of the movement parameter within the structure. A control processor adaptively generates a mapping function based on the distribution of the parameter signals to map the parameter signals to a set of color characteristic signals.
    Type: Application
    Filed: June 4, 2002
    Publication date: December 12, 2002
    Inventors: Steinar Bjaerum, Bjorn Olstad, Kjell Kristofferson
  • Publication number: 20020177775
    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: Application
    Filed: January 22, 2002
    Publication date: November 28, 2002
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Patent number: 6447450
    Abstract: An ECG gated ultrasonic imaging compounding system and method for synthesizing a cineloop of a compound ultrasonic image such as a cardiac cycle is presented. In real-time operation, a series of image frames may be recorded at a frame rate over a cardiac cycle and stored in a cineloop memory. A second series of image frames are recorded over a second cardiac cycle. The image frames of the second cardiac cycle are frame-by-frame aligned in time and space with the corresponding image frames from the cineloop memory. The aligned frames are then combined to form a series of synthesized image frames which then replace the original image frames in the cineloop memory. Subsequent series of image frames are also combined with the synthesized image frames in the cineloop memory to form new synthesized image frames which then replace the old synthesized image frames in the image array, and so forth. The series of image frames may be triggered to begin at a cardiac event such as the R-event.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: September 10, 2002
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventor: Bjørn Olstad
  • Publication number: 20020032772
    Abstract: A method for providing searching and alerting capabilities in traffic content at access points in data networks is disclosed. Typical access points for Internet, intranet and wireless traffic are described. Traffic flow through an Internet Service Provider is used as a preferred embodiment to exemplify the data traffic used as the input source in the invention. The invention teaches how proper privacy and content filters can be applied to the traffic source. The filtered data stream from the traffic flow can be used to improve the quality of existing searching and alerting services. The invention also teaches how a cache can be developed optimized for holding fresh searchable information captured in the traffic flow. It is further disclosed how the said cache can be converted to a searchable index and either separately or in cooperation with external search indexes be used as a basis for improved search services.
    Type: Application
    Filed: September 13, 2001
    Publication date: March 14, 2002
    Inventors: Bjorn Olstad, Knut Magne Risvik
  • Patent number: 6352507
    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 stain rate imaging is employed. The tissue deformation parameter strain is determined by an accumulation of stain 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 stain 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 defined by the instantaneous tissue velocity of the sample volume. An estimation of strain rate based upon a spatial derivative of tissue velocity is improved by adaptively varying the spatial offset, dr. The spatial offset, dr, can be maximized to cover the entire tissue segment (e.g.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: March 5, 2002
    Assignee: G.E. Vingmed Ultrasound AS
    Inventors: Hans Torp, Bjorn Olstad, Andreas Heimdal, Steinar Bjaerum
  • Patent number: 6350238
    Abstract: A system and method for acquiring ultrasound information at an acquisition rate and displaying at least a portion of the acquired ultrasound information at a display rate that is slower than the acquisition rate is disclosed. Ultrasound information may be continuously acquired and stored at a frame-rate that is greater than the perception rate of the human eye. At least a portion of the acquired ultrasound information is displayed at a frame-rate that allows human perception. Acquisition and display are synchronized from time-to-time upon satisfaction of a synchronization condition. The synchronization condition may be related to a predetermined time interval or a triggering event generated by or through triggering generated by, for example, a physiological event detected in, for example, an ECG trace.
    Type: Grant
    Filed: November 2, 1999
    Date of Patent: February 26, 2002
    Assignee: GE Medical Systems Global Technology Company, LLC
    Inventors: Bjorn Olstad, Hans Torp
  • Patent number: 6099471
    Abstract: An ultrasound system and method for calculation and display of strain velocity in real time is disclosed. Strain velocity may be determined from tissue velocity. Tissue velocity determined by measuring the pulse-to-pulse Doppler shift at range positions along an ultrasound beam and calculating tissue velocity based on the Doppler shift. The strain velocity is then calculated as a gradient of tissue velocity. Alternatively, linear regression methods may be used to calculate strain velocity from tissue velocity. Alternatively, strain velocity may be determined directly from the difference in Doppler shift between range positions. The result of the strain velocity determination may be displayed in a number of manners such as M-mode, color-coded video images or time-variation curves, and may be displayed in combination, or as a mixture, with a B-mode image. A reliability index may be calculated and used to modify the display of strain velocity information.
    Type: Grant
    Filed: October 7, 1998
    Date of Patent: August 8, 2000
    Assignee: General Electric Company
    Inventors: Hans Torp, Andreas Heimdal, Bjorn Olstad, Kjell Kristofferson
  • Patent number: 6019724
    Abstract: A method for generating quasi-realtime feedback for the purpose of guiding surgical, therapeutic or diagnostic procedures by means of ultrasound imaging, wherein the location of a surgical tool, therapeutic radiation field or a diagnostic energy field is related to the coordinate system of an intraoperative 2D and/or 3D ultrasound imaging system and, optionally, to pre-operative MR/CT/X-ray data, thus allowing synchronized relations between data acquisition, tool movement and image visualizations.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: February 1, 2000
    Inventors: Aage Gronningsaeter, Bjorn Olstad, Geirmund Unsgaard
  • Patent number: 5515856
    Abstract: A method for generating anatomical M-Mode displays for ultrasonic investigation of living biological structures during movement of the structure, for example a heart function, employing an ultrasonic transducer (21) comprises the acquisition of a time series of 2D or 3D ultrasonic images (22), arranging said time series so as to constitute data sets, providing at least one virtual M-Mode line (23) co-registered with said data sets, subjecting said data sets to computer processing on the basis of said at least one virtual M-Mode line, whereby interpolation along said at least one virtual M-Mode line is effected, and displaying the resulting computed anatomical M-Mode display (24) on a display unit.
    Type: Grant
    Filed: January 27, 1996
    Date of Patent: May 14, 1996
    Assignee: Vingmed Sound A/S
    Inventors: Bjorn Olstad, Eivind Holm, James Ashman
  • Patent number: 5476096
    Abstract: A method for real-time analysis and measurement of temporal tissue variations and ultrasonic signals which provides quality improvement of tissue images and qualitative and quantitative characterization of the size/shape of the imaged objects is described. A given number of image frames are stored and made available for digital data analysis. For each spatial coordinate, the temporal signal evolution or a derived temporal signal evolution is extracted. These evolutions are analyzed digitally and the resulting image can be displayed on a display unit as an improved 2D tissue image and/or an indicator image for a particular tissue or fluid category in the imaged scene. The resulting image can be further processed with a spatial filter investigating a plurality of neighboring scan lines and a plurality of neighboring ranges at each image coordinate and finally thresholded in order to obtain a binary indicator of the imaged objects that are detected in the combined time and space characterization.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: December 19, 1995
    Assignee: Vingmed Sound A/S
    Inventors: Bjorn Olstad, Torbjorn Bakke
  • Patent number: RE37088
    Abstract: A method for generating anatomical M-Mode displays for ultrasonic investigation of living biological structures during movement of the structure, for example a heart function, employing an ultrasonic transducer (21) comprises the acquisition of a time series of 2D or 3D ultrasonic images (22), arranging said time series so as to constitute data sets, providing at least one virtual M-Mode line (23) co-registered with said data sets, subjecting said data sets to computer processing on the basis of said at least one virtual M-Mode line, whereby interpolation along said at least one virtual M-Mode line is effected, and displaying the resulting computed anatomical M-Mode display (24) on a display unit.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: March 6, 2001
    Assignee: Vingmed Sound A/S
    Inventors: Bjorn Olstad, Eivind Holm, James Ashman