Search Patents
  • Method and System for Up-Vector Detection for Ribs in Computed Tomography Volumes
    Publication number: 20130070996
    Abstract: A method and system for up-vector detection for ribs in a 3D medical image volume, such as a computed tomography (CT) volume is disclosed. A rib centerline of at least one rib is extracted in a 3D medical image volume. An up-vector is automatically detected at each of a plurality of centerline points of the rib centerline of the at least one rib. The up-vector at each centerline point can be detected using a trained regression function. Alternatively, the up-vector at each centerline point can be detected by detecting an ellipse shape in a cross-sectional rib image generated at each centerline point.
    Type: Application
    Filed: September 4, 2012
    Publication date: March 21, 2013
    Applicants: Siemens Aktiengesellschaft, Siemens Corporation
    Inventors: David Liu, Hao Xu, Dijia Wu, Christian Tietjen, Grzegorz Soza, Shaohua Kevin Zhou, Dorin Comaniciu
  • Short-term Load Forecast Using Support Vector Regression and Feature Learning
    Publication number: 20130110756
    Abstract: In a support vector regression approach to forecasting power load in an electrical grid, a feature learning scheme weights each feature in the input data with its correlation with the predicted load, increasing the prediction accuracy. The kernel matrix for the input training data is computed such that features that align better with the target variable are given greater weight. The resulting load forecast may be used to compute commands sent to demand response modules.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 2, 2013
    Applicant: SIEMENS CORPORATION
    Inventor: Siemens Corporation
  • EIGEN-VECTOR APPROACH FOR COIL SENSITIVITY MAPS ESTIMATION
    Publication number: 20140088899
    Abstract: A method for estimating a coil sensitivity map for a magnetic resonance (MR) image includes providing a matrix A of sliding blocks of a 3D image of coil calibration data, calculating a left singular matrix V? from a singular value decomposition of A corresponding to ? leading singular values, calculating P=V?V?H, calculating a matrix S that is an inverse Fourier transform of a zero-padded matrix P, and solving MHcr=(Sr)Hcr for cr, where cr is a vector of coil sensitivity maps for all coils at spatial location r, and M = ( ( 1 1 … 1 0 0 … 0 … … … 0 0 … 0 ) ? ( 0 0 … 0 1 1 … 1 … … … 0 0 … 0 ) ? ? … ? ? ( 0 0 … 0 0 0 … 0 … … … 1 1 … 1 ) ) .
    Type: Application
    Filed: September 27, 2013
    Publication date: March 27, 2014
    Applicants: SIEMENS AKTIENGESELLSCHAFT, SIEMENS CORPORATION
    Inventors: Jun Liu, Hui Xue, Marcel Dominik Nickel, Ti-chiun Chang, Mariappan S. Nadar, Alban Lefebvre, Edgar Mueller, Qiu Wang, Zhili Yang, Nirmal Janardhanan, Michael Zenge
  • EIGEN-VECTOR APPROACH FOR COIL SENSITIVITY MAPS ESTIMATION
    Publication number: 20130289912
    Abstract: A method for estimating a coil sensitivity map for a magnetic resonance (MR) image includes providing (61) a matrix A of sliding blocks of a 2D image of coil calibration data, calculating (62) a left singular matrix V? from a singular value decomposition of A corresponding to ? leading singular values, calculating (63) P=V?V?H, calculating (64) a matrix S that is an inverse Fourier transform of a zero-padded matrix P, and solving (65) MHcr=(Sr)Hcr for cr, where cr is a vector of coil sensitivity maps for all coils at spatial location r, and M ? ( ( 1 1 … 1 0 0 … 0 … … … 0 0 … 0 ) ? ( 0 0 … 0 1 1 … 1 … … … 0 0 … 0 ) ? ? … ? ? ( 0 0 … 0 0 0 … 0 … … … 1 1 … 1 ) ) .
    Type: Application
    Filed: February 28, 2013
    Publication date: October 31, 2013
    Applicants: Siemens Aktiengesellschaft, Siemens Corporation
    Inventors: Jun Liu, Hui Xue, Marcel Dominik Nickel, Ti-chiun Chang, Mariappan S. Nadar, Alban Lefebvre, Edgar Mueller, Qiu Wang, Zhili Yang, Nirmal Janardhanan, Michael Zenge
  • Method for vector quantization of a feature vector
    Patent number: 8581757
    Abstract: The invention relates to a method for the vector quantization of a feature vector, in particular with respect to a data compression of a signal to be transmitted or to be stored, particularly a voice signal or a video signal, wherein at least one codebook from a plurality of codebook vectors is searched for a code vector representing the feature vector. During the search, a sequence of codebook vectors is examined for the suitability thereof to represent the feature vector. In the course of the search for the code vector, a set of neighboring vectors is dedicated to at least one of the codebook vectors potentially to be examined, preferably prior to the search. The search for the code vector includes at least part of the neighboring vectors.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: November 12, 2013
    Assignee: Siemens Enterprise Communications GmbH & Co. KG
    Inventors: Stefan Schandl, Panji Setiawan
  • Method and apparatus for stabilizing the locus of a vector formed by integration
    Patent number: 4629961
    Abstract: In order to determine from a reference vector (for instance from the EMF vector e.sub.s of a rotating field machine given by the current i.sub.s and the voltage u.sub.s) a model vector by integration (for instance the flux vector) and to thereby suppress defects of technical integrators and instabilities of the circuit used, a correction vector is formed which is rotated relative to the model vector (angle .epsilon..sub..phi.) and of which the magnitude is proportional to the derivative of the vector magnitude, or proportional to another volatile quantity. The model vector itself is obtained by integration of the sum vector formed by the reference vector and correction vector. This "voltage model" can optionally be controlled by a reference vector.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: December 16, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventor: Felix Blaschke
  • Patient signal analysis based on vector analysis
    Patent number: 10010256
    Abstract: Disclosed herein is a framework for facilitating patient signal analysis based on vector analysis. In accordance with one aspect, a set of vectors is generated from a patient signal data waveform. The vectors may be directed from a common center to points of interest on the patient signal data waveform. The framework may further extract one or more vector parameters from the set of vectors, and determine one or more vector ratios based on the vector parameters to monitor changes in the patient signal data waveform.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: July 3, 2018
    Assignee: Siemens Healthcare GmbH
    Inventor: Hongxuan Zhang
  • Patient signal analysis based on vector analysis
    Patent number: 10149625
    Abstract: Disclosed herein is a framework for facilitating patient signal analysis based on vector analysis. In accordance with one aspect, a set of vectors is generated from a patient signal data waveform. The vectors may be directed from a common center to points of interest on the patient signal data waveform. The framework may further extract one or more vector parameters from the set of vectors, and determine one or more vector ratios based on the vector parameters to monitor changes in the patient signal data waveform.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: December 11, 2018
    Assignee: Siemens Healthcare GmbH
    Inventor: Hongxuan Zhang
  • Patient signal analysis based on vector analysis
    Patent number: 9949653
    Abstract: Disclosed herein is a framework for facilitating patient signal analysis based on vector analysis. In accordance with one aspect, a set of vectors is generated from a patient signal data waveform. The vectors may be directed from a common center to points of interest on the patient signal data waveform. The framework may further extract one or more vector parameters from the set of vectors, and determine one or more vector ratios based on the vector parameters to monitor changes in the patient signal data waveform.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: April 24, 2018
    Assignee: Siemens Healthcare GmbH
    Inventor: Hongxuan Zhang
  • Patient signal analysis based on vector analysis
    Patent number: 9782092
    Abstract: Disclosed herein is a framework for facilitating patient signal analysis based on vector analysis. In accordance with one aspect, a set of vectors is generated from a patient signal data waveform. The vectors may be directed from a common center to points of interest on the patient signal data waveform. The framework may further extract one or more vector parameters from the set of vectors, and determine one or more vector ratios based on the vector parameters to monitor changes in the patient signal data waveform.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: October 10, 2017
    Assignee: SIEMENS MEDICAL SOLUTIONS USA, INC.
    Inventor: Hongxuan Zhang
  • Method and circuitry for approximating the magnitude of a vector
    Patent number: 4481601
    Abstract: A magnitude signal representing the approximate magnitude of a control parameter vector for the control of multi-phase electrical apparatus is developed from the Cartesian coordinate signals of the vector. Signals representing one or both coordinates of a plurality of auxiliary vectors are formed by vector rotation coordinate determination techniques. The signal from among the auxiliary vector coordinate signals (and, optionally the control parameter vector coordinate signals) having the greatest absolute value is selected as the magnitude signal. Auxiliary vector coordinate signals are formed by proportional stages coupled to adder stages which combine specified constant proportions of the control parameter vector coordinate signals. A diode network provides biasing so that only the signal with the greatest value will be passed. The auxiliary vector forming method for vector magnitude approximation provides accuracy and simplicity.
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: November 6, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventor: Georg Heinle
  • Devices and Methods for Sparse Representation of Dense Motion Vector Fields for Compression of Visual Pixel Data
    Publication number: 20140049607
    Abstract: A coding method for the compression of an image sequence involves firstly determining a dense motion vector field for a current image region of the image sequence by comparison with at least one further image region of the image sequence. Furthermore, a confidence vector field is determined for the current image region. The confidence vector field specifies at least one confidence value for each motion vector of the motion vector field. Based on the motion vector field and the confidence vector field, motion vector field reconstruction parameters are then determined for the current image region. Furthermore, a decoding method decodes image data of an image sequence which were coded by such a coding method.
    Type: Application
    Filed: February 14, 2012
    Publication date: February 20, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Peter Amon, Andreas Hutter, Professor André Kaup, Andreas Weinlich
  • Test vector verification system
    Patent number: 6223272
    Abstract: The present invention relates to a verification system for verifying whether vector outputs from a software simulator match the vector outputs from a hardware emulator by comparing a pair of checksums. A first checksum value is calculated from the output vectors obtained from the software simulator and a second checksum is calculated from the output vectors obtained from the hardware emulator. Accordingly, only a checksum value is required to be downloaded or uploaded, thereby eliminating the need to upload or download large numbers of output vectors.
    Type: Grant
    Filed: July 15, 1998
    Date of Patent: April 24, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventors: Paul R. Coehlo, Manuel O. Gautho, Yeh-Chen Fu
  • Method and apparatus for determining the flux vector of a rotating-field machine
    Patent number: 4885519
    Abstract: A method and apparatus for determining the flux vector of a rotating-field machine that enables a rotating-field machine, especially a permanently excited synchronous machine, to be controlled without mechanical transmitter even at low frequencies. An EMF vector is interated in a flux computer to determine a direction angle of a model flux vector. The flux vector rotates a perpendicular correction vector until an oscillating stator current component parallel to the model flux vector generates no corresponding oscillations in the stator current component perpendicular thereto. Preferably, a multiplier forms a correlation signal between the impressed oscillating stator current component and the oscillations in the stator current component perpendicular thereto. The correlation signal indicates the value of the components of the correction vector perpendicular to the model flux vector.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: December 5, 1989
    Assignee: Siemens Aktiengesellschaft
    Inventor: Heinrich-Karl Vogelmann
  • Method and switching arrangement for regulation of a two-dimensional vector of a segment by means of a value-discrete setting element with a limited switching frequency
    Patent number: 5280419
    Abstract: A method and a switching arrangement are provided for regulating a two-dimensional vector of a controlled system with a discrete value final controlling element having a limited switching frequency. The discrete value final controlling element also has limited number of actual-value vectors. A switching arrangement, such as a microprocessor, receives actual values for the two-dimensional vector as well as a reference vector and selects three actual-value vectors that are adjacent to the reference vector. The switching arrangement generates a reference trajectory which represents a sequence of vector settings for the discrete value final controlling element. A switch from one actual-value vector to another takes place when the distance between the two-dimensional vector and a next corner point of the reference trajectory is at a minimum. The resulting mean value of the generated two-dimensional vector is equal to the reference vector.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: January 18, 1994
    Assignee: Siemens Aktiengesellschaft
    Inventor: Gerald Amler
  • Apparatus for determining defining quantities of a planar vector
    Patent number: 4138729
    Abstract: A vector analyzer which serves for determining defining quantities of a planar vector in which the output of a digital counter is fed, via sine and cosine function generators, to a vector rotator addressed by the component voltages of an input vector and made to follow the value of the phase angle of the input vector by means of a three point control in order to make the output of the digital overflow counter follow the phase angle of an input vector by means of a control loop; the counter content is reset to zero without problem if the value 360.degree. of the phase angle is exceeded. The invention can be used particularly for field orientation control of rotating field machines.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: February 6, 1979
    Assignee: Siemens Aktiengesellschaft
    Inventors: Karl-Heinz Bayer, Felix Blaschke, Ingemar Neuffer, Wolfgang Michel
  • Converter for changing Cartesian vector variables into polar vector variables
    Patent number: 4306296
    Abstract: A coordinate converter useful for field-oriented control of a rotating-field machine includes a divider, a first adder, a multiplier and a second adder by which the magnitude of the vector and the tangent of the half-angle relative to one axis can be determined. An ancillary unit forms an angle-proportional variable from the half-angle tangent. A rotating vector can also be processed.
    Type: Grant
    Filed: March 21, 1979
    Date of Patent: December 15, 1981
    Assignee: Siemens Aktiengesellschaft
    Inventor: Felix Blaschke
  • Method and arrangement for vector quantization and for inverse vector quantization of a digitized image
    Patent number: 6360020
    Abstract: In a vector quantization of a digitized image, image regions (QB) to be quantized are selected smaller than, for example, image blocks (BB) of an image (B). In the reconstruction, image points (NBP) that are not located in an image region (QB) to be quantized are interpolated and/or extrapolated.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: March 19, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stathis Panis
  • Method and apparatus for determining the flux vector of a rotating field machine
    Patent number: 4626761
    Abstract: For determining the flux vector, an EMF vector (e.sub.s) is formed in an EMF detector (15) from the stator current and the stator voltage, the components of which are determined in a rotating coordinate system rotated by an angle (.beta.) relative to the coordinate system which is fixed with respect to the stator. The flux vector (.psi..sub..beta.) is formed in the rotating coordinate system, taking into consideration the rotary EMF component (e.sub..beta..sup.R) which is generated from the flux vector through rotation by .pi./2 and multiplication by the frequency of rotation (.beta.). The angle of rotation (.beta.) is determined by feeding the direction deviation of the flux vector (.psi..sub..beta.) or a reference vector (.psi.*) for the flux vector by the angle (.beta.) to a servo control (27 or 30, respectively), the output signal of which is fed as the speed of rotation (.beta.) via an integrator (20) for forming the angle of rotation (.beta.).
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: December 2, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventor: Felix Blaschke
  • Device for the execution of a scalar multiplication of vectors
    Patent number: 4566077
    Abstract: A device for executing a scalar multiplication of vectors is constructed in the form of an interferometric adder for residue numbers. A plurality of series-connected, vector-component-controlled phase modulators are disposed in each of the phase-modulatable light beams existing for such adder. A phase modulator is provided for each component of a vector, and which generates a phase shift as a function of the components of the vectors to be multiplied which are supplied to it. This phase shift is proportional both to the component of the one as well as to the component of the other vector. The phase shift generated by each component amounts to 2.pi. when the numerical value of the component is divisible by the corresponding module without remainder. The result of the scalar multiplication is derivable as a positionally notated number from the interference pattern or interference patterns produced after the radiation through the phase modulators.
    Type: Grant
    Filed: November 17, 1983
    Date of Patent: January 21, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventors: Dieter Schuocker, Ekkehard Klement
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