Patents by Inventor Andrei Feldman

Andrei Feldman 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: 9159124
    Abstract: A method includes enhancing a contrast to noise ratio (CNR) of image data, generating CNR enhanced image data, wherein the CNR enhanced image data has a substantially same image quality as the image data. A computing system (118) includes a computer readable storage medium (122) encoded with computer readable instructions for enhancing a contrast to noise ratio (CNR) of image data and one or more processors (120), which, when executing the computer readable instructions, causes the computing system to enhance the CNR of the image data. A method includes generating CNR enhanced image data, wherein CNR enhanced image data has a substantially same noise level, noise power spectrum, and spatial resolution of the image data.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: October 13, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Liran Goshen, Asher Gringauz, Yechiel Lamash, Andrei Feldman, Guido Pardo-Roques, Jonathan Sapir
  • Publication number: 20130243348
    Abstract: A method includes enhancing a contrast to noise ratio (CNR) of image data, generating CNR enhanced image data, wherein the CNR enhanced image data has a substantially same image quality as the image data. A computing system (118) includes a computer readable storage medium (122) encoded with computer readable instructions for enhancing a contrast to noise ratio (CNR) of image data and one or more processors (120), which, when executing the computer readable instructions, causes the computing system to enhance the CNR of the image data. A method includes generating CNR enhanced image data, wherein CNR enhanced image data has a substantially same noise level, noise power spectrum, and spatial resolution of the image data.
    Type: Application
    Filed: November 16, 2011
    Publication date: September 19, 2013
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Liran Goshen, Asher Gringauz, Yechiel Lamash, Andrei Feldman, Guido Pardo-Roques, Jonathan Sapir
  • Patent number: 8135194
    Abstract: A method for producing an artifact-corrected image of negative jaw impression in a recipient jaw comprising, forming a negative impression of said recipient jaw, producing a first digital image of said negative jaw impression, producing a second digital image, including said artifacts of said negative jaw impression in said recipient jaw and using said first digital image to produce an artifact-corrected computer representation of said negative impression in said recipient jaw.
    Type: Grant
    Filed: August 4, 2009
    Date of Patent: March 13, 2012
    Assignee: I-Dent Imaging, Inc.
    Inventor: Andrei Feldman
  • Publication number: 20090295795
    Abstract: A method for producing an artifact-corrected image of negative jaw impression in a recipient jaw comprising, forming a negative impression of said recipient jaw, producing a first digital image of said negative jaw impression, producing a second digital image, including said artifacts of said negative jaw impression in said recipient jaw and using said first digital image to produce an artifact-corrected computer representation of said negative impression in said recipient jaw.
    Type: Application
    Filed: August 4, 2009
    Publication date: December 3, 2009
    Inventor: Andrei FELDMAN
  • Patent number: 7574025
    Abstract: A method for producing an artifact-corrected image of a negative jaw impression in a recipient jaw comprising, forming a negative impression of said recipient jaw, producing a first digital image of said negative jaw impression, producing a second digital image, including said artifacts of said negative jaw impression in said recipient jaw and using said first digital image to produce an artifact-corrected computer representation of said negative impression in said recipient jaw.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: August 11, 2009
    Assignee: I-Dent Imaging, Inc.
    Inventor: Andrei Feldman
  • Publication number: 20050084144
    Abstract: A method for producing an artifact-corrected image of a negative jaw impression in a recipient jaw comprising, forming a negative impression of said recipient jaw, producing a first digital image of said negative jaw impression, producing a second digital image, including said artifacts of said negative jaw impression in said recipient jaw and using said first digital image to produce an artifact-corrected computer representation of said negative impression in said recipient jaw.
    Type: Application
    Filed: January 16, 2003
    Publication date: April 21, 2005
    Inventor: Andrei Feldman
  • Patent number: 5225979
    Abstract: A method and a system for calibrating an x-ray scanner, in which the lengths d.sub.ij of x-ray paths are first computed by means of the image of the calibration standard. There are then computed both the theoretical attenuations Ac.sub.ij and the attenuations Am.sub.ij measured on the image. There are then deduced the coefficient of proportionality K between the values Ac.sub.ij and Am.sub.ij in order to obtain values of K.times.Ac.sub.i. The values KAc.sub.i and Am.sub.i are employed for calculating the corrections to be made per channel as a function of the attenuation.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: July 6, 1993
    Assignee: General Electric CGT SA
    Inventors: Andrei Feldman, Dominique Cornuejols
  • Patent number: 5222021
    Abstract: The disclosure concerns X-ray scanners and, more particularly, a method to measure the bone density of a patient that takes his or her build into account. The disclosed method consists in performing a calibration of the bone density measurement by means of a phantom that simulates the patient's body and the vertebra an calibration phantom comprising a water insert and an insert with a high concentration of K.sub.2 HPO.sub.4. A measurement is made of the densities of several inserts of different concentrations and of the concentration of the water insert and of the K.sub.2 HPO.sub.4 high concentration insert, in the presence and without the presence of the bag of water, enabling the computation of corrections of the measured density of the patient's vertebra depending on his or her build.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: June 22, 1993
    Assignee: General Electric CGR S.A.
    Inventors: Andrei Feldman, Philippe Giudici
  • Patent number: 5216600
    Abstract: A method for elimination of parasitic noise in an x-ray scanner consists of computing the mean value of the signals of the ten first views in a circuit (26). This mean value is subtracted from the signals of the first view V.sub.1 in a circuit (27) so as to obtain the high-frequency components H.sub.1 which are considered as parasitic noise. The signals H.sub.1 are filtered in a high-pass filter before being subtracted from the signals of the view V.sub.1 to obtain signals V'.sub.1 which are free of parasitic components. The signals V'.sub.1 are processed in a sequential circuit (31) in order to obtain signals V'.sub.2 which are free of parasitic component. The same process is repeated for the signals of the other views V.sub.3 to V.sub.m.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: June 1, 1993
    Assignee: General Electric CGR SA
    Inventors: Andrei Feldman, Dominique Cornuejols
  • Patent number: 5214578
    Abstract: A method and system to calibrate an X-ray scanner uses a single circular phantom. The circular phantom is off-centered with respect to the axis of rotation of the scanner so as to introduce different paths in the phantom for each channel, depending on the angular positions of the scanner. This results in different attenuation measurements which are compared with values obtained by the computation of the path lengths which depend on the off-centered coordinates r and .PHI. and on the position of the scanner, thus enabling computation of the polynomial approximation coefficients to be applied to the measurements.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: May 25, 1993
    Assignee: General Electric CGR SA
    Inventors: Dominique Cornuejols, Andrei Feldman
  • Patent number: 5095431
    Abstract: The invention relates to x-ray scanners and more particularly to a method for calibrating scanners by means of a single standard of elliptical shape, for example. Attenuation measurements are performed with respect to a number of principal angular positions of the scanner about the standard. In addition, a number of meaurements or views are taken on each side of this principal position in order to compute a mean attenuation with respect to each channel. The attenuation curve is then smoothed by filtering and polynomial approximation.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: March 10, 1992
    Assignee: General Electric CGR S.A.
    Inventors: Andrei Feldman, Dominique Cornuejols
  • Patent number: 5056020
    Abstract: Disclosed is a method for the correction, in a scanner, of the defects due to the movements of the scanner. The method consists in having a rod which introduces a major attenuation and causing the scanner to make a full turn around a center of rotation O and obtaining m distinct views of the rod, each corresponding to an angular position .alpha..sub.j. The analysis of the signals of each view enables determining the angle .beta..sub.j of the rod. The knowledge of this angle .beta..sub.j leads to the computation of the coordinates b and c of the rod and the theoretical value .beta..sub.th of the angle .beta. for each view. The difference between the theoretical value .beta..sub.th and the measured value .beta..sub.j is used in the device for processing the scanner image.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: October 8, 1991
    Assignee: General Electric CGE SA
    Inventors: Andrei Feldman, Dominique Cornuejols