Patents by Inventor Gilles Beaudoin
Gilles Beaudoin 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).
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Patent number: 8948841Abstract: The present invention relates to a MR tracking method and device. More specifically, the present invention relates to a magnetic resonance tracking method and device, using a magnetic-susceptible object. A magnetic iso-surface induced by the object is selectively excited with a corresponding frequency offset; the magnetic iso-surface is then projected on three axes of a k-space, from which projections the spatial position of the object is calculated.Type: GrantFiled: June 22, 2006Date of Patent: February 3, 2015Assignees: Polyvalor, Limited Partnership, Val-Chum, Limited PartnershipInventors: Sylvain Martel, Jean-Baptiste Mathieu, Ouajdi Felfoul, Gilles Beaudoin
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Patent number: 7962194Abstract: A magnetic resonance imager (MRI) controllably propels at least one magnetic field responsive body within a subject. The MRI comprises a bore magnet producing an intense magnetic field sufficient to magnetically saturate the magnetic field responsive body. A magnetic field gradient generator is configured to apply variable magnetic gradients to at least a portion of the subject containing the magnetically-saturated body. A controller instructs the magnetic field gradient generator to acquire image data of the magnetically-saturated body within the subject and to apply a calculated magnetic gradient that will propel the magnetically-saturated body towards a target location in the subject. A tracking unit of the MRI provides position feedback information of the magnetically-saturated body within the subject.Type: GrantFiled: April 15, 2003Date of Patent: June 14, 2011Assignees: Polyvalor, Limited Partnership, Val-Chum, Limited PartnershipInventors: Sylvain Martel, Jean-Baptiste Mathieu, L'Hocine Yahia, Gilles Soulez, Gilles Beaudoin
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Publication number: 20100168553Abstract: The present invention relates to a MR tracking method and device. More specifically, the present invention relates to a magnetic resonance tracking method and device, using a magnetic-susceptible object. A magnetic iso-surface induced by the object is selectively excited with a corresponding frequency offset; the magnetic iso-surface is then projected on three axes of a k-space, from which projections the spatial position of the object is calculated.Type: ApplicationFiled: June 22, 2006Publication date: July 1, 2010Inventors: Sylvain Martel, Jean-Baptiste Mathieu, Ouajdi Felfoul, Gilles Beaudoin
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Patent number: 6901280Abstract: An orthopedic magnetic resonance imaging system is disclosed. This system includes a source of magnetic resonance imaging data sets resulting from successive magnetic resonance imaging acquisitions from a diseased joint of a patient. A segmentation module segments surfaces in the joint based on information contained within at least one of the data sets, and a registration module spatially registers, in three dimensions, information represented by a first of the data sets with respect to information represented by one or more further data sets for the same patient. A comparison module detects differences between information represented by the data sets caused by progression of the disease in the joint of the patient between acquisitions. A cross-patient comparison module can compare detected differences for the patient with detected differences for at least one other patient.Type: GrantFiled: May 6, 2003Date of Patent: May 31, 2005Assignee: Arthrovision, Inc.Inventors: Jean Pierre Pelletier, Johanne Martel-Pelletier, M. Jacques de Guise, Jean-Pierre Raynauld, Marie-Josee Barthiaume, Gilles Beaudoin, M. Benoit Godbout, M. Claude Kauffmann
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Publication number: 20050084145Abstract: An orthopedic magnetic resonance imaging system is disclosed. This system includes a source of magnetic resonance imaging data sets resulting from successive magnetic resonance imaging acquisitions from a diseased joint of a patient. A segmentation module segments surfaces in the joint based on information contained within at least one of the data sets, and a registration module spatially registers, in three dimensions, information represented by a first of the data sets with respect to information represented by one or more further data sets for the same patient. A comparison module detects differences between information represented by the data sets caused by progression of the disease in the joint of the patient between acquisitions. A cross-patient comparison module can compare detected differences for the patient with detected differences for at least one other patient.Type: ApplicationFiled: December 3, 2004Publication date: April 21, 2005Inventors: Jean Pelletier, Johane Pelletier, Jacques Guise, Jean-Pierre Raynauld, Marie-Josee Barthiaume, Gilles Beaudoin, Benoit Godbout, Claude Kauffmann
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Publication number: 20050085709Abstract: An orthopedic magnetic resonance imaging system is disclosed. This system includes a source of magnetic resonance imaging data sets resulting from successive magnetic resonance imaging acquisitions from a diseased joint of a patient. A segmentation module segments surfaces in the joint based on information contained within at least one of the data sets, and a registration module spatially registers, in three dimensions, information represented by a first of the data sets with respect to information represented by one or more further data sets for the same patient. A comparison module detects differences between information represented by the data sets caused by progression of the disease in the joint of the patient between acquisitions. A cross-patient comparison module can compare detected differences for the patient with detected differences for at least one other patient.Type: ApplicationFiled: December 3, 2004Publication date: April 21, 2005Inventors: Jean Pierre Pelletier, Johane Pelletier, Jacques de Guise, Jean-Pierre Raynauld, Marie-Josee Barthiaume, Gilles Beaudoin, Benoit Godbout, Claude Kauffmann
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Patent number: 6809518Abstract: Adiabatic RF pulses are very useful in MRI when precise flip angles are needed. Unfortunately, adiabatic pulses suffer from a long application time and a high SAR. A new concept to modify the usual adiabatic pulse into a “pseudo-adiabatic” pulse having a shorter application time and lower SAR is introduced. For example, a BIR-4 of 32 ms of application time and a relative SAR of 20 will be transformed into a BIR-4-S1 of 1 ms and relative SAR of 1. The new pulse obtained stays insensitive for a large B1 range but loses its slice selectivity to become a 3D pulse. Experimental results are presented to illustrate the sensitivity to B1 and B0.Type: GrantFiled: May 20, 2003Date of Patent: October 26, 2004Inventors: Gilles Beaudoin, Jean-Charles Côte
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Publication number: 20040210128Abstract: Described is a method and system for propelling and controlling displacement of a microrobot through a patient's blood vessel. The microrobot is formed with a body containing field-of-force responsive material wherein, in response to a field of force, the material undergoes a force in the direction of a gradient of the field of force. The microrobot is positioned in a blood vessel for displacement through the blood vessel, and a field of force with a given gradient is generated and applied to the microrobot in view of propelling the microrobot through the blood vessel in the direction of the gradient of the field of force. A direction and amplitude of the gradient of the field of force is calculated to thereby control displacement of the microrobot through the patient's blood vessel.Type: ApplicationFiled: April 15, 2003Publication date: October 21, 2004Inventors: Sylvain Martel, Jean-Baptiste Mathieu, L'Hocine Yahia, Gilles Soulez, Gilles Beaudoin
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Publication number: 20040015072Abstract: An orthopedic magnetic resonance imaging system is disclosed. This system includes a source of magnetic resonance imaging data sets resulting from successive magnetic resonance imaging acquisitions from a diseased joint of a patient. A segmentation module segments surfaces in the joint based on information contained within at least one of the data sets, and a registration module spatially registers, in three dimensions, information represented by a first of the data sets with respect to information represented by one or more further data sets for the same patient. A comparison module detects differences between information represented by the data sets caused by progression of the disease in the joint of the patient between acquisitions. A cross-patient comparison module can compare detected differences for the patient with detected differences for at least one other patient.Type: ApplicationFiled: May 6, 2003Publication date: January 22, 2004Inventors: Jean Pierre Pelletier, Johane M. Pelletier, Jacques A. de Guise, Jean-Pierre Raynauld, Marie-Josee Berthiaunme, Gilles Beaudoin, M.Benoit Godbout, M.Claude Kauffmann
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Publication number: 20030234647Abstract: Adiabatic RF pulses are very useful in MRI when precise flip angles are needed. Unfortunately, adiabatic pulses suffer from a long application time and a high SAR. A new concept to modify the usual adiabatic pulse into a “pseudo-adiabatic” pulse having a shorter application time and lower SAR is introduced. For example, a BIR-4 of 32 ms of application time and a relative SAR of 20 will be transformed into a BIR-4-S1 of 1 ms and relative SAR of 1. The new pulse obtained stays insensitive for a large B1 range but loses its slice selectivity to become a 3D pulse. Experimental results are presented to illustrate the sensitivity to B1 and B0.Type: ApplicationFiled: May 20, 2003Publication date: December 25, 2003Applicant: Corporation Du Centre De Recherche Du Centre Hospitalier De L'Universite De Montreal (CHUM)Inventors: Gilles Beaudoin, Jean-Charles Cote
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Patent number: 6560476Abstract: An orthopedic magnetic resonance imaging system is disclosed. This system includes a source of magnetic resonance imaging data sets resulting from successive magnetic resonance imaging acquisitions from a diseased joint of a patient. A segmentation module segments surfaces in the joint based on information contained within at least one of the data sets, and a registration module spatially registers, in three dimensions, information represented by a first of the data sets with respect to information represented by one or more further data sets for the same patient. A comparison module detects differences between information represented by the data sets caused by progression of the disease in the joint of the patient between acquisitions. A cross-patient comparison module can compare detected differences for the patient with detected differences for at least one other patient.Type: GrantFiled: November 1, 2000Date of Patent: May 6, 2003Assignee: Arthrovision, Inc.Inventors: Jean Pierre Pelletier, Johane Pelletier, M. Jacques de Guise, Jean-Pierre Raynauld, Marie-Josee Barthiaume, Gilles Beaudoin, M. Benoit Godbout, M. Claude Kauffmann
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Patent number: 5043427Abstract: This invention relates to a process for continuously fractionating plant, animal or human proteins by selective precipitation of the proteins resulting from placing a solution of proteins in contact with a precipitating agent constituted by a fatty acid of 6 to 14 carbon atoms, such as caprylic acid, is characterized in that respective deliveries of fatty acid and of the protein solution are continuously placed in contact in a mixing chamber of small volume with respect to the deliveries, creating a strong stirring in this mixing chamber; the individual deliveries of fatty acid and of protein solution are adjusted to controlled pH and temperature so as to maintain their ratio equal to a predetermined value; the mixture is then allowed to evolve during a phase of maturation so as to form a suspension; this suspension is separated into a liquid part from which are extracted the proteins having remained soluble, and a solid part containing proteins of different nature; and the parameters intervening in the proceType: GrantFiled: May 31, 1989Date of Patent: August 27, 1991Assignee: Foundation Nationale de Transfusion SanguineInventors: Catherine Leberre, Alain Faure, Gilles Beaudoin, Brigitte Roche, Pierre Colinart, Henri Renon