Patents by Inventor Lasse Lovstakken
Lasse Lovstakken 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).
-
Patent number: 11497473Abstract: A method of processing cardiac ultrasound data for determining information about a mechanical wave in the heart. The method comprises receiving data representative of a time series of three-dimensional data frames, generated from ultrasound signals from a human or animal heart, each frame comprising a set of voxels, each voxel value representing an acceleration component of a respective location in the heart at a common time. The method also comprises identifying, for each voxel, a frame of the series in which the voxel value is at a maximum. A three-dimensional time-propagation data set is generated by assigning each voxel a value representative of the time of the respective frame in the time series for which the corresponding voxel is at a maximum. The method then comprises generating data representative of a three-dimensional velocity vector field by calculating time derivatives from the three-dimensional time-propagation data set.Type: GrantFiled: September 27, 2019Date of Patent: November 15, 2022Assignee: Norwegian University of Science and Technology (NTNU)Inventors: Sebastien Salles, Lasse Lovstakken, Hans Torp
-
Patent number: 11071516Abstract: An ultrasound imaging method in which ultrasound signals are transmitted into a living organism, reflected from fluid flowing along a path within the organism, and received by an ultrasound transceiver system with a resolution limit in a first direction. These signals are used to generate data representing a sequence of images over time; each image including a speckle pattern arising from interference within the reflected ultrasound signals. A peak-sharpening operation is applied to the image data, generating data representing a sequence of resolution-enhanced images, each having a resolution in the first direction finer than the resolution limit of the transceiver system in that direction, and including a respective peak-sharpened speckle pattern. A combining operation is applied to generate data representing an output image in which the path of the fluid is represented by a superimposition of the peak-sharpened speckle patterns from the resolution-enhanced images.Type: GrantFiled: September 1, 2017Date of Patent: July 27, 2021Assignee: Norwegian University of Science and Technology (NTNU)Inventors: Hans Torp, Lasse Lovstakken
-
Publication number: 20210085294Abstract: A method of processing cardiac ultrasound data for determining information about a mechanical wave in the heart. The method comprises receiving data representative of a time series of three-dimensional data frames, generated from ultrasound signals from a human or animal heart, each frame comprising a set of voxels, each voxel value representing an acceleration component of a respective location in the heart at a common time. The method also comprises identifying, for each voxel, a frame of the series in which the voxel value is at a maximum. A three-dimensional time-propagation data set is generated by assigning each voxel a value representative of the time of the respective frame in the time series for which the corresponding voxel is at a maximum. The method then comprises generating data representative of a three-dimensional velocity vector field by calculating time derivatives from the three-dimensional time-propagation data set.Type: ApplicationFiled: September 27, 2019Publication date: March 25, 2021Inventors: Sebastien SALLES, Lasse LOVSTAKKEN, Hans TORP
-
Publication number: 20200074625Abstract: A method for processing echocardiography data to enable automatic functional measurements based on cardiac ultrasound images as an input, including (i) classification of the cardiac ultrasound images to ensure that relevant images are passed on to the next steps, optionally utilising a first neural network, such as a convolutional neural network, (ii) segmentation and semantic partitioning of the left ventricle (LV) myocardium to extract relevant parts of the image, optionally by using a second neural network, (iii) regional motion estimates to determine a mapping of displacements in the extracted parts of the image and to output estimated tissue motion vectors for the extracted parts of the image, optionally using a third neural network, and (iv) fusion of measurements via state estimation applied to the tissue motion vectors and thereby incorporating a temporal domain to produce data showing variation of the estimated measurements over time.Type: ApplicationFiled: September 4, 2019Publication date: March 5, 2020Inventors: Andreas ØSTVIK, Erik SMISTAD, Lasse LØVSTAKKEN
-
Publication number: 20190223828Abstract: An ultrasound imaging method in which ultrasound signals are transmitted into a living organism, reflected from fluid flowing along a path within the organism, and received by an ultrasound transceiver system with a resolution limit in a first direction. These signals are used to generate data representing a sequence of images over time; each image including a speckle pattern arising from interference within the reflected ultrasound signals. A peak-sharpening operation is applied to the image data, generating data representing a sequence of resolution-enhanced images, each having a resolution in the first direction finer than the resolution limit of the transceiver system in that direction, and including a respective peak-sharpened speckle pattern. A combining operation is applied to generate data representing an output image in which the path of the fluid is represented by a superimposition of the peak-sharpened speckle patterns from the resolution-enhanced images.Type: ApplicationFiled: September 1, 2017Publication date: July 25, 2019Inventors: Hans TORP, Lasse LOVSTAKKEN
-
Patent number: 8475380Abstract: Certain embodiments of the present technology provide systems and methods that provide reduction of multiline artifacts in Doppler imaging. Certain embodiments provide for various ensembles of transmit beams at different spatial locations and overlapping receive beams between the locations. Certain embodiments provide for calculating various auto-correlation estimates based on the received beams and then combining the auto-correlation estimates to create an image. In certain embodiments, combining the auto-correlation estimates comprises applying a linear interpolation filter that decreases the weight applied for receive beams that are spatially located further away from the transmit beam.Type: GrantFiled: August 31, 2009Date of Patent: July 2, 2013Assignee: General Electric CompanyInventors: Kjell Kristoffersen, Hans Torp, Tore Gruner Bjastad, Lasse Lovstakken, Torbjorn Hergum, Johan Kirkhorn
-
Patent number: 8002704Abstract: A method and system for determining contact along a surface of an ultrasound probe are provided. The method includes frequency analyzing ultrasound signals received by the ultrasound probe and displaying indicators of acoustic contact of the ultrasound probe with an object based on the frequency analysis.Type: GrantFiled: May 25, 2005Date of Patent: August 23, 2011Assignee: General Electric CompanyInventors: Hans Garmann Torp, Fredrik Orderud, Lasse Lovstakken
-
Publication number: 20110054316Abstract: Certain embodiments of the present technology provide systems and methods that provide reduction of multiline artifacts in Doppler imaging. Certain embodiments provide for various ensembles of transmit beams at different spatial locations and overlapping receive beams between the locations. Certain embodiments provide for calculating various auto-correlation estimates based on the received beams and then combining the auto-correlation estimates to create an image. In certain embodiments, combining the auto-correlation estimates comprises applying a linear interpolation filter that decreases the weight applied for receive beams that are spatially located further away from the transmit beam.Type: ApplicationFiled: August 31, 2009Publication date: March 3, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Kjell Kristoffersen, Hans Torp, Tore Grüner Bjastad, Lasse Lovstakken, Torbjorn Hergum, Johan Kirkhorn
-
Publication number: 20070010742Abstract: A method and system for determining contact along a surface of an ultrasound probe are provided. The method includes frequency analyzing ultrasound signals received by the ultrasound probe and displaying indicators of acoustic contact of the ultrasound probe with an object based on the frequency analysis.Type: ApplicationFiled: May 25, 2005Publication date: January 11, 2007Inventors: Hans Torp, Fredrik Orderud, Lasse Lovstakken