Patents by Inventor Todor Sheljaskow

Todor Sheljaskow 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: 20180098750
    Abstract: Methods and systems are provided for ultrasound transducers with variable pitch. In one embodiment, an ultrasound probe comprises a plurality of transducer elements arranged in an array, wherein a pitch between adjacent transducer elements increases from a first pitch in a center of the array to a second pitch at an edge of the array, and wherein the pitch gradually varies between the first pitch and second pitch for transducer elements positioned between the center and the edge. In this way, an ultrasound probe can be operated in multiple modes while avoiding image artifacts caused by an abrupt change in pitch.
    Type: Application
    Filed: October 6, 2016
    Publication date: April 12, 2018
    Inventors: Bruno Hans Haider, David Martin Mills, Scott William Easterbrook, Todor Sheljaskow
  • Patent number: 9380992
    Abstract: A method and system are provided for estimating velocity of flow within an ultrasound dataset. A sample volume gate is defined on a two-dimensional (2D) image. The 2D image is based on an ultrasonic dataset. Spectral Doppler velocity estimates of flow are detected within the sample volume gate in first and second dimensions that are orthogonal with respect to each other. A true velocity estimate of the flow within the sample volume gate is determined based on the Doppler velocity estimates.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: July 5, 2016
    Assignee: General Electric Company
    Inventors: Anne Lindsay Hall, Todor Sheljaskow
  • Patent number: 8303502
    Abstract: An ultrasound system comprises a position sensing module, an imaging tracking module, a display and a user interface. The position sensing module detects spatial information associated with a volume of data. The display displays first and second images based on the volume of data. The first and second images comprise first and second portions of the volume of data, and the first and second portions are at least partially different with respect to each other. The user interface selects a first image tracking point on the first image. The first image tracking point is indicated on the first image with a first indicator. The image tracking module tracks the first image tracking point within the volume of data. The image tracking module indicates on the display a spatial relationship of the first image tracking point to the second image.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: November 6, 2012
    Assignee: General Electric Company
    Inventors: Michael Joseph Washburn, Markus Wilhelm Marquart, Todor Sheljaskow
  • Patent number: 8090168
    Abstract: A method for visualizing a registered image is presented. The method includes receiving a first image data set and at least one other image data set. Further, the method includes displaying at least a portion of the first image data set on a first portion of a display. Also, the method includes displaying at least a portion of the at least one other image data set on a second portion of the display. Additionally, the method includes selectively adjusting display of the at least a portion of the at least one other image data to provide a context to the first image data set. Systems and computer-readable medium that afford functionality of the type defined by this method is also contemplated in conjunction with the present technique.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: January 3, 2012
    Assignee: General Electric Company
    Inventors: Michael Joseph Washburn, Markus Wilhelm Marquart, Todor Sheljaskow
  • Publication number: 20090097723
    Abstract: A method for visualizing a registered image is presented. The method includes receiving a first image data set and at least one other image data set. Further, the method includes displaying at least a portion of the first image data set on a first portion of a display. Also, the method includes displaying at least a portion of the at least one other image data set on a second portion of the display. Additionally, the method includes selectively adjusting display of the at least a portion of the at least one other image data to provide a context to the first image data set. Systems and computer-readable medium that afford functionality of the type defined by this method is also contemplated in conjunction with the present technique.
    Type: Application
    Filed: October 15, 2007
    Publication date: April 16, 2009
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Michael Joseph Washburn, Markus Wilhelm Marquart, Todor Sheljaskow
  • Publication number: 20080242996
    Abstract: A method and system are provided for estimating velocity of flow within an ultrasound dataset. A sample volume gate is defined on a two-dimensional (2D) image. The 2D image is based on an ultrasonic dataset. Spectral Doppler velocity estimates of flow are detected within the sample volume gate in first and second dimensions that are orthogonal with respect to each other. A true velocity estimate of the flow within the sample volume gate is determined based on the Doppler velocity estimates.
    Type: Application
    Filed: March 30, 2007
    Publication date: October 2, 2008
    Inventors: Anne Lindsay Hall, Todor Sheljaskow
  • Publication number: 20080221446
    Abstract: An ultrasound system comprises a position sensing module, an imaging tracking module, a display and a user interface. The position sensing module detects spatial information associated with a volume of data. The display displays first and second images based on the volume of data. The first and second images comprise first and second portions of the volume of data, and the first and second portions are at least partially different with respect to each other. The user interface selects a first image tracking point on the first image. The first image tracking point is indicated on the first image with a first indicator. The image tracking module tracks the first image tracking point within the volume of data. The image tracking module indicates on the display a spatial relationship of the first image tracking point to the second image.
    Type: Application
    Filed: March 6, 2007
    Publication date: September 11, 2008
    Inventors: Michael Joseph Washburn, Markus Wilhelm Marquart, Todor Sheljaskow
  • Patent number: 7368852
    Abstract: Matching layers are provided, including: electrically conductive acoustic matching layers, methods for conducting electric current through matching layers, methods for manufacturing multi-dimensional arrays using conductive matching layers, and multi-dimensional arrays with electrically conducting matching layers. Matching layers with conductors aligned for providing electrical conduction through the thickness or range dimension of the matching layer are provided. For example, vias, aligned magnetic particles, or conductive films at least partially or entirely within the matching layer of each element allow electrical conduction from the transducer material to a ground foil or flex circuit. By using multiple electrical conductive matching layers, a gradation in acoustic impedance for better matching is provided while allowing dicing of the entire stack, including the matching layers and the electroceramic material, in one step.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: May 6, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Gregg W. Frey, Todor Sheljaskow, Walt T. Wilser, Worth B. Walters, Nelson H. Oliver
  • Publication number: 20080027320
    Abstract: Endocavity and invasive catheter transducers for four-dimensional or other imaging are provided. A two-dimensional or other multi-dimensional array of elements is connected with a minimum number of conductors to an imaging system. One or more conductors are used to select an aperture, such as selecting one or more rows of elements for activation. Along a different axis, such as an orthogonal axis, elements are used to image a planar region. By electronically switching the selected aperture, different planes are rapidly imaged. A matrix configuration of electrodes, such as using column electrodes for phased array imaging and row electrodes for selecting an elevation aperture allows for rapid acquisition of ultrasound data.
    Type: Application
    Filed: September 27, 2007
    Publication date: January 31, 2008
    Inventors: Mirsaid Bolorforosh, David Bruce, Stephen Barnes, Todor Sheljaskow, Jian-Hua Mo
  • Patent number: 7314447
    Abstract: An ultrasound transducer assembly is disclosed having a housing, a transducer array mounted in the housing and an electronics assembly mounted in the housing, the electronics assembly including one or more sub-assemblies having heat generating components disposed thereon. The electronics sub-assemblies further include thermal conducting features which conduct heat generated by the heat generating components out of the electronics assembly where it can be further removed by other thermal management techniques. These other thermal management techniques may include techniques utilized to cool the transducer array.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: January 1, 2008
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: William J. Park, Vaughn Marian, David Petersen, Todor Sheljaskow, Mirsaid S. Boloforosh, Worth B. Walters, Sevig Ayter
  • Publication number: 20060173343
    Abstract: Electronic cross-talk is reduced in an ultrasound transducer. Ground traces are interleaved with signal traces on a flexible film. By providing ground traces between the signal traces, the electrical cross-talk between signal traces is reduced.
    Type: Application
    Filed: December 17, 2004
    Publication date: August 3, 2006
    Inventors: Xiaocong Guo, Grazyna Palczewska, Todor Sheljaskow, Ellen Rowland, Haifeng Wang
  • Patent number: 6994674
    Abstract: A multi-dimensional transducer array has pitch along one dimension less than the pitch along a second dimension. The multi-dimensional transducer array with the same or different pitch is manufactured from a plurality of modules. Each of the modules are separately diced and then aligned and combined. Elements of a transducer array are used for isolating a transmit channel from a receive channel. Separate signal lines or traces are provided individually for each element on opposite sides of each element. A transmit channel may connect to one electrode on an element, and the receive channel may connect to an opposite electrode on the element. A multi-dimensional array is provided for time division multiplex processing. A probe houses the multi-dimensional array and a multiplexer.
    Type: Grant
    Filed: June 27, 2002
    Date of Patent: February 7, 2006
    Assignee: Siemens Medical Solutions USA, Inc.
    Inventors: Todor Sheljaskow, Grazyna Palczewska, Stephen C. Englund, Thomas G. Houck, Gregg W. Frey, Ron Ho, Sevig Ayter, Xiaocong Guo
  • Publication number: 20050225210
    Abstract: Electrical connection is provided in a transducer stack through a backing block. A flexible circuit is sandwiched between pieces of acoustic attenuating material. For example, 2 to 200 or more flexible circuits are stacked in alternating layers with pieces of acoustically attenuating material. The alternating layers are then connected together to form a backing block with Z-axis electrical connection. The top surface of the connected backing block includes a plurality of exposed electrical traces from the flex circuit. Since flex circuits are used, the electrical traces are precisely aligned along one dimension. Since pre-formed acoustic attenuating material pieces are used, precise alignment is provided along a second or orthogonal dimension. The substrate holding the electrical traces in the flexible circuits provides more stability and allows for easier connection to circuit boards as compared to individual strips of metal.
    Type: Application
    Filed: April 1, 2004
    Publication date: October 13, 2005
    Inventors: Stephen Englund, Ellen Rowland, Grazyna Palczewska, Gregg Frey, Todor Sheljaskow, Lisa Fearn, Vaughn Marian, Nelson Oliver, Walter Wilser, Worth Walters
  • Publication number: 20050193820
    Abstract: Detecting damage risk or preventing damage in handheld electronics devices uses an integrated motion sensor. To detect damage risk, a shock sensor is positioned in a handheld electronics device, such as on or within a housing of the electronics device. Through a display, communication or other mechanism, shock information is provided to assess a type or amount of damage to a product. For preventing damage in a handheld electronics device, a drop is detected within the handheld electronics device. In response to the detected drop, a component within the handheld electronics device is positioned. For example, the component is moved from a position of risk during a shock to a position of lesser risk during a shock. The handheld electronics device is free of mechanical connection to other devices, such as a cell phone, a personal digital assistant, a CD player, a tape player, a radio or other device of handheld size that is carryable or worn by a person.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 8, 2005
    Inventors: Todor Sheljaskow, Vaughn Marian, Nelson Oliver
  • Publication number: 20050148877
    Abstract: Methods, systems, and probes are provided for medical ultrasound imaging. By using larger segments for transmit than receive or by using a sparse sampling of elements on transmit than used for receive, the number of transmit beamformer channels relative to receive beamformer channels is reduced. Where the transmit waveformed generators of the transmit beamformer channels are positioned within an ultrasound probe, the space and power requirements of the transmit beamformer channels are reduced based on the reduction in number of transmit segments. Different approaches may be used for reducing the number of transmit channels relative to receive segments. For example, a flexible circuit is connected to one side of a multi-dimensional array and defines transmit segments as groups of two or more elements. A different flexible circuit connects on an opposite side of the elements. The different flexible circuit defines receive segments as individual elements or a fewer number of elements than the transmit segments.
    Type: Application
    Filed: December 17, 2003
    Publication date: July 7, 2005
    Inventors: Xiaocong Guo, Todor Sheljaskow, Linxin Yao, Grazyna Palczewska
  • Publication number: 20050124884
    Abstract: Endocavity and invasive catheter transducers for four-dimensional or other imaging are provided. A two-dimensional or other multi-dimensional array of elements is connected with a minimum number of conductors to an imaging system. One or more conductors are used to select an aperture, such as selecting one or more rows of elements for activation. Along a different axis, such as an orthogonal axis, elements are used to image a planar region. By electronically switching the selected aperture, different planes are rapidly imaged. A matrix configuration of electrodes, such as using column electrodes for phased array imaging and row electrodes for selecting an elevation aperture allows for rapid acquisition of ultrasound data.
    Type: Application
    Filed: May 18, 2004
    Publication date: June 9, 2005
    Inventors: Mirsaid Bolorforosh, David Bruce, Stephen Barnes, Todor Sheljaskow, Jian-Hua Mo
  • Publication number: 20050075573
    Abstract: An ultrasound transducer assembly is disclosed having a housing, a transducer array mounted in the housing and an electronics assembly mounted in the housing, the electronics assembly including one or more sub-assemblies having heat generating components disposed thereon. The electronics sub-assemblies further include thermal conducting features which conduct heat generated by the heat generating components out of the electronics assembly where it can be further removed by other thermal management techniques. These other thermal management techniques may include techniques utilized to cool the transducer array.
    Type: Application
    Filed: March 15, 2004
    Publication date: April 7, 2005
    Inventors: William Park, Vaughn Marian, David Petersen, Todor Sheljaskow, Mirsaid Bolorforosh, Worth Walters, Sevig Ayter
  • Publication number: 20050039323
    Abstract: Matching layers are provided, including: electrically conductive acoustic matching layers, methods for conducting electrical potential through matching layers, methods for manufacturing multi-dimensional arrays using conductive matching layers, and multi-dimensional arrays with electrically conducting matching layers. Matching layers with conductors aligned for providing electrical potential through the thickness or range dimension of the matching layer are provided. For example, via, aligned magnetic particles, or conductive films at least partially or entirely within the matching layer of each element allow electrical conduction from the transducer material to a ground foil or flex circuit. By using multiple electrical conductive matching layers, a gradation in acoustic impedance for better matching is provided while allowing dicing of the entire stack, including the matching layers and the transducer material, in one step.
    Type: Application
    Filed: August 22, 2003
    Publication date: February 24, 2005
    Inventor: Todor Sheljaskow
  • Publication number: 20050042424
    Abstract: Matching layers are provided, including: electrically conductive acoustic matching layers, methods for conducting electric current through matching layers, methods for manufacturing multi-dimensional arrays using conductive matching layers, and multi-dimensional arrays with electrically conducting matching layers. Matching layers with conductors aligned for providing electrical conduction through the thickness or range dimension of the matching layer are provided. For example, vias, aligned magnetic particles, or conductive films at least partially or entirely within the matching layer of each element allow electrical conduction from the transducer material to a ground foil or flex circuit. By using multiple electrical conductive matching layers, a gradation in acoustic impedance for better matching is provided while allowing dicing of the entire stack, including the matching layers and the electroceramic material, in one step.
    Type: Application
    Filed: August 22, 2003
    Publication date: February 24, 2005
    Inventors: Gregg Frey, Todor Sheljaskow, Walter Wilser, Worth Walters, Nelson Oliver
  • Patent number: 6730033
    Abstract: A two-dimensional array allows rapid three-dimensional ultrasound scanning. A high volume-per-second scan rate using a limited number of system channels (e.g. 192, 256 or other number of channels) is provided by a transducer array without beamforming circuitry in the probe. A fan beam of acoustic energy is transmitted along a scan plane from transducer elements that extend lengthwise over a substantial portion of the lateral aperture. Rows of these long transmit elements are provided along the elevation aperture for electronic steering of the fan beam in the elevation dimension. One or more rows of smaller receive elements are used for forming beams each representing a scan line along the lateral dimension in response to each transmission of a fan beam. Elevation resolution is provided primarily from the elevationally spaced transmit elements and partially from two or more rows of laterally spaced receive elements. The lateral resolution is responsive to the lateral spacing of the receive elements.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: May 4, 2004
    Assignee: Siemens Medical Systems, Inc.
    Inventors: Lin Xin Yao, Todor Sheljaskow