Patents Assigned to InnerVision Medical Technologies Inc.
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Patent number: 9188673Abstract: An ultrasound imaging method transmits ultrasound into a medium from a source and receives and samples signals resulting from interaction of the ultrasound with the medium for each of a plurality of sources. The sampled signals are stored. Criteria are applied to select subsets of the stored sampled signals. In some embodiments the criteria relate to locations of a source and/or receiving element corresponding to a sampled signal. Images are generated from the subsets.Type: GrantFiled: August 7, 2012Date of Patent: November 17, 2015Assignee: InnerVision Medical Technologies Inc.Inventors: Bhaskar Ramamurthy, Timothy J. Davies
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Publication number: 20140146637Abstract: Ultrasound data is acquired by a synthetic aperture technique which uses multiple ultrasound transmissions from point sources. RF data is stored and processed. Doppler velocities for pixels in an insonified region are obtained by processing the stored data. One or more pan boxes may be provided. Doppler velocities may be determined by obtaining I and Q images for a plurality of frames and performing autocorrelation across the frames for some or all pixels in the frames.Type: ApplicationFiled: November 25, 2013Publication date: May 29, 2014Applicant: InnerVision Medical Technologies Inc.Inventors: Bhaskar Ramamurthy, Sean Murphy
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Publication number: 20130077441Abstract: An ultrasound imaging method transmits ultrasound into a medium from a source and receives and samples signals resulting from interaction of the ultrasound with the medium for each of a plurality of sources. The sampled signals are stored. Criteria are applied to select subsets of the stored sampled signals. In some embodiments the criteria relate to locations of a source and/or receiving element corresponding to a sampled signal. Images are generated from the subsets.Type: ApplicationFiled: August 7, 2012Publication date: March 28, 2013Applicant: INNERVISION MEDICAL TECHNOLOGIES INC.Inventors: Bhaskar Ramamurthy, Timothy J. Davies
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Patent number: 8234923Abstract: Systems and methods are disclosed for improving the resolution and quality of an image formed by signals from an array of receivers. Multiple receivers introduce variations in arrival times that can be less than the period of an operating signal, and also less than the period associated with a sampling operation. Thus, multiple receivers allow sampling of fine features of reflected signals that would be considered beyond the resolution associated with the operating signal. Use of multiple receivers also provides an effective sampling rate that is greater than the sampling rate of an individual receiver. Similar advantages can be obtained using multiple transmitters. Such advantageous features can be used to obtain high resolution images of objects in a medium in applications such as ultrasound imaging. Sub-Nyquist sampling is discussed. Accounting for the effects of refraction on pathlengths as a signal passes between two regions of different sound speed allows improved calculation of focus distances.Type: GrantFiled: November 19, 2010Date of Patent: August 7, 2012Assignee: InnerVision Medical Technologies Inc.Inventors: Bhaskar Ramamurthy, Timothy J. Davies
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Publication number: 20110125017Abstract: Systems and methods are disclosed for improving the resolution and quality of an image formed by signals from an array of receivers. Multiple receivers introduce variations in arrival times that can be less than the period of an operating signal, and also less than the period associated with a sampling operation. Thus, multiple receivers allow sampling of fine features of reflected signals that would be considered beyond the resolution associated with the operating signal. Use of multiple receivers also provides an effective sampling rate that is greater than the sampling rate of an individual receiver. Similar advantages can be obtained using multiple transmitters. Such advantageous features can be used to obtain high resolution images of objects in a medium in applications such as ultrasound imaging. Sub-Nyquist sampling is discussed. Accounting for the effects of refraction on pathlengths as a signal passes between two regions of different sound speed allows improved calculation of focus distances.Type: ApplicationFiled: November 19, 2010Publication date: May 26, 2011Applicant: InnerVision Medical Technologies Inc.Inventors: Bhaskar Ramamurthy, Timothy J. Davies
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Patent number: 7914451Abstract: Systems and methods are described for determining tissue attributes using ultrasound energy. Various characteristics of a medium, such as an animal tissue, can be estimated using techniques such as signal trace analysis and angular-dependency analysis of reflectivity. Such techniques can be performed in conjunction with a spectral decomposition analysis. Attributes can be cross-plotted so as to facilitate user analysis and better understanding of the medium. Attributes obtained in the foregoing manner do not necessarily need to conform to standard values, especially when attempting to detect and characterize an anomaly within the medium. Relative differences of attribute values within the medium can provide information about the anomaly. Additional information about the anomaly can be provided by an observation of the anomaly by an expert.Type: GrantFiled: September 15, 2005Date of Patent: March 29, 2011Assignee: InnerVision Medical Technologies Inc.Inventor: Tim Davies
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Patent number: 7862508Abstract: Systems and methods are disclosed for improving the resolution and quality of an image formed by signals from an array of receivers. Multiple receivers introduce variations in arrival times that can be less than the period of an operating signal, and also less than the period associated with a sampling operation. Thus, multiple receivers allow sampling of fine features of reflected signals that would be considered beyond the resolution associated with the operating signal. Use of multiple receivers also provides an effective sampling rate that is greater than the sampling rate of an individual receiver. Similar advantages can be obtained using multiple transmitters. Such advantageous features can be used to obtain high resolution images of objects in a medium in applications such as ultrasound imaging. Sub-Nyquist sampling is discussed. Accounting for the effects of refraction on pathlengths as a signal passes between two regions of different sound speed allows improved calculation of focus distances.Type: GrantFiled: March 20, 2006Date of Patent: January 4, 2011Assignee: InnerVision Medical Technologies Inc.Inventors: Timothy J. Davies, Richard W. Evans, Jeffrey Grossman, Scott Phillips
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Patent number: 7850611Abstract: Systems and methods are disclosed for improving the resolution and quality of an image formed by signals from an array of receivers. Multiple receivers introduce variations in arrival times that can be less than the period of an operating signal, and also less than the period associated with a sampling operation. Thus, multiple receivers allow sampling of fine features of reflected signals that would be considered beyond the resolution associated with the operating signal. Use of multiple receivers also provides an effective sampling rate that is greater than the sampling rate of an individual receiver. Similar advantages can be obtained using multiple transmitters. Such advantageous features can be used to obtain high resolution images of objects in a medium in applications such as ultrasound imaging.Type: GrantFiled: September 20, 2004Date of Patent: December 14, 2010Assignee: InnerVision Medical Technologies Inc.Inventors: Timothy J. Davies, Richard Evans