Patents by Inventor Bernard Thevenin

Bernard Thevenin 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: 6295337
    Abstract: The present invention relates to a digital radiography device with protection against electrical risks, having: a radiation source (10); a sensor (12) connected to an electronic card (13) of a computer (14), first and second assemblies (20, 21) isolated from each other from the galvanic point of view, the first assembly (20) comprising electronic means connected to the sensor (12), the second assembly (21) comprising means for supplying a voltage for supplying the sensor (12) during the presence of radiation and a voltage for supplying the sensor part of the card (13), and means for providing management of the sensor, recovery of the data and processing thereof; the two assemblies (20, 21) exchanging information by optical means.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: September 25, 2001
    Assignee: Commissariat A l'Energie Atomique
    Inventors: Bernard Thevenin, Francis Glasser
  • Patent number: 5937027
    Abstract: A method and a device for taking digital images in which the exposure time of the object to X or .gamma. rays is controlled and optimized in a way that produces, with each taking of an image, a non-saturated image and minimizes the dose of radiation necessary to produce this image. The device includes at least one image sensor having measurement pixels and pixels. The measurement pixels measure a current representative of a dose of radiation received by the object, and the image pixels are used to form the digital image. The dose of radiation measured by the measurement pixels is compared to a guide-line value, and when this dose measurement reaches the guide-line value the collection of the electrical charge by the image pixels is stopped. The stopping of the collection of the electrical charges is performed without stopping the radiation emission.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: August 10, 1999
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Bernard Thevenin, Francis Glasser, Jean-Luc Martin
  • Patent number: 5371362
    Abstract: A nuclear detection process and an apparatus therefore, including base potential correction and corresponding apparatus in which the base potential is measured by establishing a histogram of the values of the detected pulses and the value of the abscissa of the first peak of the histogram is determined and is subtracted from the values of the detected pulses.
    Type: Grant
    Filed: November 14, 1991
    Date of Patent: December 6, 1994
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Corinne Mestais, Bernard Thevenin
  • Patent number: 5065316
    Abstract: The coordinates X and Y of the location of a scintillation crystal excited by nuclear radiation are determined as a function of the signals X.sup.+, X.sup.-, Y.sup.+, Y.sup.- produced conventionally by an electronic circuit associated with the scintillation crystal. The signals X.sup.+, X.sup.-, Y.sub.+ and Y.sup.- are digitized and the digital coordinate X (respectively Y) is obtained as the product of a first digital data item X.sup.+ -X.sup.- (respectively Y.sup.+ -Y.sup.-) and a second digital data item inversely proportional to the energy of the nuclear radiation received. To prevent beats in the value of the coordinates X and Y, which leads to a moire phenomenon in the radiation image, a random element is introduced into the calculation, for example by adding p random bits to the first digital data item.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: November 12, 1991
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Michel Tararine, Bernard Thevenin, Monique Marcaud
  • Patent number: 5048102
    Abstract: A multiple interpolation process for image correction involves the precalculation of interpolation contributions relative to all the possible locations of the points of an elementary mesh. The positions of these locations are determined as a function of an interpolation fineness to be obtained. It is shown that this precalculation can be obtained without significantly enlarging the memory of an apparatus used. In addition, the performance speed permits the "in flight" definition of images and the display of weakly defined images in highly defined images.
    Type: Grant
    Filed: September 14, 1988
    Date of Patent: September 10, 1991
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Michel Tararine, Bernard Thevenin