Patents by Inventor Louis-Gilles Durand

Louis-Gilles Durand 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: 7439493
    Abstract: A multimodality imaging phantom is disclosed which is useful for calibrating devices for imaging vascular conduits. The phantom is compatible with X-ray, ultrasound and magnetic resonance imaging techniques. It allows testing, calibration, and inter-modality comparative study of imaging devices, in static or dynamic flow conditions. It also provides a geometric reference for evaluation of accuracy of imaging devices. The tissue-mimicking material is preferably an agar-based solidified gel. A vessel of known desired geometry runs throughout the gel and is connected to an inlet and outlet at its extremities for generating a flow circulation in the vessel. Said phantom also contains fiducial markers detectable in the above-mentioned modalities. The markers are preferably made of glass and are embedded in a layer of agar gel containing a fat component.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: October 21, 2008
    Assignees: Institut de Recherches Cliniques, Centre Hospitalier de l'Universite, Universite de Montreal
    Inventors: Pierre Teppaz, Salah Dine Qanadli, Guy Cloutier, Gilles Soulez, Richard Cimon, Louis-Gilles Durand
  • Publication number: 20050123178
    Abstract: A multimodality imaging phantom is disclosed which is useful for calibrating devices for imaging vascular conduits. The phantom is compatible with X-ray, ultrasound and magnetic resonance imaging techniques. It allows testing, calibration, and inter-modality comparative study of imaging devices, in static or dynamic flow conditions. It also provides a geometric reference for evaluation of accuracy of imaging devices. The tissue-mimicking material is preferably an agar-based solidified gel. A vessel of known desired geometry runs throughout the gel and is connected to an inlet and outlet at its extremities for generating a flow circulation in the vessel. Said phantom also contains fiducial markers detectable in the above-mentioned modalities. The markers are preferably made of glass and are embedded in a layer of agar gel containing a fat component.
    Type: Application
    Filed: November 5, 2002
    Publication date: June 9, 2005
    Inventors: Pierre Teppaz, Salah Qanadli, Guy Cloutier, Gilles Soulez, Richard Cimon, Louis-Gilles Durand
  • Publication number: 20030086535
    Abstract: A multimodality imaging phantom is disclosed in the present invention. This multimodality imaging phantom is particularly useful for calibrating devices for imaging vascular conduits. The phantom is compatible with X-ray, ultrasound and magnetic resonance imaging techniques. It allows testing, calibration, and inter-modality comparative study of imaging devices, in static or dynamic flow conditions. It also provides a geometric reference for evaluation of accuracy of imaging devices. The tissue-mimicking material is preferably an agar-based solidified gel. A vessel of known desired geometry runs throughout the gel and is connected to an inlet and outlet at its extremities for generating a flow circulation in the vessel. Using a lost-material casting technique, complex realistic geometry (including 3D configurations with no symmetry axis or plane) of normal or diseased vessel can be modeled. Said phantom also contains fiducial markers detectable in the above-mentioned modalities.
    Type: Application
    Filed: November 8, 2001
    Publication date: May 8, 2003
    Inventors: Pierre Teppaz, Salah Dine Qanadli, Guy Cloutier, Gilles Soulez, Richard Cimon, Louis-Gilles Durand
  • Patent number: 6368283
    Abstract: The method of estimating systolic and mean pulmonary artery pressures of a patient, comprising the steps of (a) producing an electric signal xs(t) representative of heart sounds of the patient; (b) extracting second heart sound S2(t) from the signal produced in step (a); (c) extracting pulmonary and aortic components P2(t) and A2(t) from S2(t); (d) extracting a signal representative of mean cardiac interval; (e) correlating the pulmonary and aortic components P2(t) and A2(t) to obtain a cross correlation function; (f) measuring a splitting interval of the cross correlation function obtained in step (e); (g) producing a normalized splitting interval; and (h) estimating the systolic and mean pulmonary artery pressures by means of predetermined regressive functions. The present invention also relates to an apparatus for estimating systolic and mean pulmonary artery pressures of a patient.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: April 9, 2002
    Assignees: Institut de Recherches Cliniques de Montreal, Universite Laval
    Inventors: Jingping Xu, Philippe Pibarot, Louis-Gilles Durand
  • Patent number: 6241683
    Abstract: To compensate for the poor signal-to-noise ratio when transforming a patient tracheal sound signal into a respiration flow signal, the transformed signal is used when the sound signal is above a threshold, and interpolated values are used when the sound signal is below the threshold. A volume of breath signal is reliably obtained. Respiration start/stop is detected either by analyzing the sound signal or by physical measurement of the patient. A wearable device incorporating the sound signal processing method can provide an immediate indication or alarm when the volume of breath signal indicates a condition requiring medical attention.
    Type: Grant
    Filed: February 22, 1999
    Date of Patent: June 5, 2001
    Assignees: Institut de recherches cliniques de Montréal (IRCM), McGill University
    Inventors: Peter T. Macklem, Cheng-Li Que, Suzanne M. Kelly, Krzystof Kolmaga, Louis-Gilles Durand
  • Patent number: 5602924
    Abstract: The electronic stethoscope is designed to minimize the influence of the various types of noise while optimizing auscultation of the sounds of interest, and to enable a cardiologist to auscultate mechanical heart valves. It comprises a probe for sensing sounds of interest produced within a patient's body and for converting these sounds to an electric signal, and an audio amplifier and earphones for reproducing the sounds of interest in response to this electric signal.
    Type: Grant
    Filed: December 9, 1993
    Date of Patent: February 11, 1997
    Assignee: Theratechnologies Inc.
    Inventors: Jocelyn Durand, Louis-Gilles Durand, Marie-Claude Grenien