Patents by Inventor Michel Tararine

Michel Tararine 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: 6348692
    Abstract: The invention relates to a process for determining the position of an event with respect to a set of N photodetectors, comprising the following after digitization of the signal output by each photodetector: calculate an uncorrected position of the event, determine the distance of each photodetector from the uncorrected position, calculate a corrected value of the contribution of each photodetector as a function of the distance from P0, calculate a new position P1, as a function of the corrected contributions of the photodetectors and their position. Another purpose of the invention is a device for embodiment of the process.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: February 19, 2002
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Alain Chapuis, Claude Janin, Michel Tararine
  • Patent number: 6326624
    Abstract: Method and apparatus for determining a position of an event. The system processes signals from an assembly of N photodetectors and includes a signal generator for producing a signal representing the value of the maximum, or the energy, of a pulse delivered by the photodetector and is digitized. It also includes a signal generator for producing a threshold-exceeded signal for each photodetector when the amplitude of the signal representing the value of the maximum, or the energy, of the digitized pulse is greater than the threshold. It also includes a signal generator common to the photodetectors, for delivering a signal representing a position of an event as a function of the threshold-exceed signals. This device can be used with gamma cameras.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: December 4, 2001
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Alain Chapuis, Claude Janin, Corinne Mestais, Michel Tararine
  • Patent number: 6057551
    Abstract: A process for processing signals delivered by a gamma camera including two detectors (23, 26, 28, 24, 27 and 29) on either side of a radioactive body (25), each of the detectors (23, 26, 28, 24, 27 and 29) producing analogue electric signals (x.sup.+, x.sup.-, y.sup.+, y.sup.- and w) consisting of pulses relevant to the impacts of gamma-ray photons (.gamma.' and .gamma.") on the detectors (23 and 24), the coordinates of the impact points being calculated from compressed signals, and the detection of the impact being performed in parallel by coincidence.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: May 2, 2000
    Assignee: SMV International
    Inventor: Michel Tararine
  • Patent number: 5606166
    Abstract: A method for the correction of uniformity of a gamma camera comprising a detector giving, for each pixel i,j having coordinates x.sub.i, y.sub.i, a number n.sub.ij representing the number of scintillations recorded in said pixel. The method comprises an initial step consisting in:placing a point source at a finite distance from said detector;acquiring the number n.sub.ij at each pixel i,j,computing the parameters x.sub.o, y.sub.o, z.sub.o that minimize the function: ##EQU1## N.sub.ij being defined by the expression ##EQU2## in which: x.sub.o, y.sub.o are the coordinates of the point source in the plane of the detector,z.sub.o is the distance from the point source to the plane of the detector,N.sub.o is the signal at the pixel having coordinates x.sub.o, y.sub.o,multiplying the number n.sub.ij of each pixel by a coefficient proportional to: ##EQU3## Application to medical imaging using gamma camera type display devices.
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: February 25, 1997
    Assignee: Sopha Medical
    Inventor: Michel Tararine
  • Patent number: 5373161
    Abstract: A gamma camera includes means for the localization of scintillations produced under the effect of a gamma radiation in a scintillator crystal, the localization means including an array of photomultiplier tubes with gain control obtained by means of calibrated light pulses, and a localization circuit wherein each photomultiplier tube is connected, firstly, through a diode called a resolution diode, to a weighting circuit comprising a network of resistors connected to output adders and, secondly, to a linearizing circuit giving a signal called a linearity signal. The linearizing circuit also gives, for a duration at least equal to the duration of the calibrated light pulses, a pulse to inhibit the resolution diode with respect to the electrical pulses delivered by the photomultiplier tube in response to the light pulses.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: December 13, 1994
    Assignee: Sopha Medical
    Inventors: Michel Tararine, Jean-Francois Benard
  • 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
  • Patent number: 4900931
    Abstract: Device for locating nuclear radiation and radiation image formation device incorporating such a locating device.The locating device comprises a detection head having a crystal for converting a nuclear radiation into photons and a plurality of transducers for converting the photons into electric signals.These signals are received in a position coder, which has in series a weighting circuit for supplying analog signals X.sup.+, X.sup.-, Y.sup.- (and optionally Z), a digitizing device for digitizing the analog signals and a digital computer for producing digital signals X.sub.N, Y.sub.N defining the position of a nuclear radiation exciting the crystal.
    Type: Grant
    Filed: May 11, 1988
    Date of Patent: February 13, 1990
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Edmond Tournier, Michel Tararine