Patents Assigned to Art Advanced Research and Technology Inc.
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Patent number: 7286869Abstract: The present invention relates to a method for wavelength selection in a multi-wavelength TPSF or CW-based optical imaging system. This consists of identifying several chromophores in a highly turbid medium and selecting optimized wavelengths whereby using these wavelengths optimizes the deduction of the chromophore concentrations. Such chromophore concentrations may be combined to deduce other properties of the turbid medium.Type: GrantFiled: January 16, 2004Date of Patent: October 23, 2007Assignee: ART, Advanced Research Technologies, Inc.Inventors: David Jonathan Hall, Mathias Kohl-Bareis
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Publication number: 20070158585Abstract: Methods and apparatuses for determining the depth and concentration of fluorophores in a turbid medium are disclosed. The method advantageously provides for a rapid estimation of the depth of the flurophore using characteristics of a temporal point spread function. The concentration of the flurophore can be determined using the method of the present invention by combining a calculated depth of the flurophore with a measurement of the intensity of the emitted fluorescence. The intensity can be accurately measured by the apparatus disclosed herein which combine back-reflection and trans-illumination geometries for the source of light injecting and detection.Type: ApplicationFiled: October 29, 2004Publication date: July 12, 2007Applicant: ART, Advanced Research Technologies Inc.Inventors: David Hall, Guobin Ma, Frederic Lesage, Pascal Gallant
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Publication number: 20060149479Abstract: There is provided an improved method for enhancing fluorescence images of an object, such as a biological tissue, by selectively eliminating or reducing unwanted fluorescence from fluorophores other than the fluorophore of interest. The method is based on the measurement of the lifetime of fluorophores while preserving information related to the fluorescence intensity of the fluorophore of interest.Type: ApplicationFiled: December 30, 2004Publication date: July 6, 2006Applicant: ART, Advanced Research Technologies Inc.Inventor: Guobin Ma
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Patent number: 7047057Abstract: The TPSF-based imaging technique uses multiple wavelengths to image an object simultaneously. Acquisition time of an image can be shortened without sacrificing the effective amount or quality of raw imaging data acquired. A plurality of distinguishable wavelengths may be used simultaneously at different injection-detection positions to acquire simultaneously a plurality of TPSF-based imaging data points for the different injection-detection positions. The multiple wavelengths may provide complementary information about the object being imaged.Type: GrantFiled: January 22, 2002Date of Patent: May 16, 2006Assignee: ART. Advanced Research Technologies Inc.Inventors: David Hall, Richard Boudreault, Pierre A. Beaudry
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Publication number: 20060094940Abstract: There is provided a method for optimizing wavelength selection for multiwavelength optical data acquisition of chromophores in a turbid medium. The optimization is based on the minimization of a criterion based on the variance matrix of chromophores estimate features. The method can advantageously be used to obtain physiological information from biological tissue.Type: ApplicationFiled: September 21, 2005Publication date: May 4, 2006Applicant: ART, ADVANCED RESEARCH TECHNOLOGIES, INC.Inventors: Philippe St-Jean, Frederic Lesage, Xavier Intes, Frederic Leblond
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Patent number: 6992762Abstract: There is provided a method and system for collecting optical data for use in time resolved optical imaging wherein light is directionally propagated through free-space optics to impinge on a plurality of illumination at the surface of a biological tissue such as that comprised in small animals. Light re-emitted from the tissue is collected and directionally propagated through free space optics towards a detector to produce time resolved optical signals useful for optical image reconstructions.Type: GrantFiled: September 22, 2003Date of Patent: January 31, 2006Assignee: ART Advanced Research Technologies Inc.Inventors: William F. Long, Yves Bérubé-Lauzière, David J. Hall, Laura McIntosh
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Patent number: 6954663Abstract: There is provided a method and a system for determining the concentration of chromophores and reconstructing images in turbid media, such as animal tissues, using a continuous wave optical approach. In particular the approach is based on measurements of attenuation signals and the calculation of concentrations of chromophores using a predetermined scatter law. The system comprises a continuous wave photon migration model calculator coupled to an optical source and detector for estimating concentrations of chromophores and scatter parameters used in image reconstruction.Type: GrantFiled: January 7, 2003Date of Patent: October 11, 2005Assignee: ART Advanced Research Technologies Inc.Inventor: David J. Hall
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Publication number: 20050187478Abstract: In a method of multi-wavelength imaging internal structures of a highly turbid medium, the internal structures are imaged at each one of a set of at least two predetermined wavelengths, to generate a corresponding set of respective images. The set of images are then merged to generate a corresponding fused image.Type: ApplicationFiled: July 16, 2002Publication date: August 25, 2005Applicant: ART, Advanced Research Technologies Inc.Inventors: Pierre Beaudry, Richard Boudreault, Julie Frechette, Sonia Verreault, Pierre Galarneau
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Patent number: 6922859Abstract: There is provided a table for positioning a patient for a medical procedure on a breast, the table comprising: a solid frame surrounding a perimeter of the table; and a membrane-like contour surface for a surrounding breast area, wherein the surface comprises an aperture for the breast to be pendantly suspended therethrough, and the surface is adjusted to a shape of the patient's body. Preferably, the membrane-like contour surface covers the entire surface area of the table. Alternatively, it can be limited to a section that will cover an area from approximately the bottom of the rib cage to the collar bone when the patient is lying face down on the table.Type: GrantFiled: November 29, 2002Date of Patent: August 2, 2005Assignee: Art Advanced Research Technologies Inc.Inventors: Mario Gagnon, Christian Pilon
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Patent number: 6886198Abstract: A table is provided for positioning a patient for a medical procedure on a breast, the table comprising: a supporting platform having a back end for supporting the patient's legs and a front end for supporting the patient's torso while the patient is in a prone position, and a cavity at the front end for allowing the breast and a surrounding axilla region to be pendantly suspended therethrough; and an armrest for positioning and supporting a forearm such that a shoulder adjacent to the axilla region is at a desired height, wherein the armrest is lower than the platform.Type: GrantFiled: December 12, 2002Date of Patent: May 3, 2005Assignee: ART Advanced Research Technologies Inc.Inventors: Peter Marin, Luc Corbeil
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Patent number: 6883194Abstract: There is provided a table for positioning a patient for a medical procedure on a breast, the table comprising: a supporting platform having a back end for supporting the patient's legs and a front end for supporting the patient's torso while the patient is in a prone position, and a cavity at the front end for allowing the breast and a surrounding axilla region to be pendantly suspended therethrough; wherein the table has a lateral depression for allowing an arm and a shoulder adjacent to the breast to extend over the table and be lowered such that skin from the axilla region is relaxed and extends through the cavity, and the table is configured to provide the depression on each side of the cavity in a position where a right shoulder would be when a right breast.Type: GrantFiled: November 8, 2002Date of Patent: April 26, 2005Assignee: Art Advanced Research and Technology Inc.Inventors: Luc Corbeil, Peter Marin, Mario Gagnon, Benoît Orban, Christian Pilon
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Publication number: 20050010113Abstract: The present invention relates to a method for wavelength selection in a multi-wavelength TPSF or CW-based optical imaging system. This consists of identifying several chromophores in a highly turbid medium and selecting optimized wavelengths whereby using these wavelengths optimizes the deduction of the chromophore concentrations. Such chromophore concentrations may be combined to deduce other properties of the turbid medium.Type: ApplicationFiled: January 16, 2004Publication date: January 13, 2005Applicant: ART, Advanced Research Technologies, Inc.Inventors: David Hall, Mathias Kohl-Bareis
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Publication number: 20040147844Abstract: There is provided a method and system for optical imaging of a light scattering object. The method comprises the detection of one or more time-gates of a temporal point spread function (TPSF) to be used to construct an image of optical properties of the object. The method also comprises the simultaneous detection of two or more selected time-gates using a time-gated camera. The method enables more efficient spatial-temporal acquisition of optical signals for imaging purposes.Type: ApplicationFiled: January 16, 2004Publication date: July 29, 2004Applicant: ART, Advanced Research Technologies, Inc.Inventor: David Jonathan Hall
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Publication number: 20040133085Abstract: There is provided a method and a system for determining the concentration of chromophores and reconstructing images in turbid media, such as animal tissues, using a continuous wave optical approach. In particular the approach is based on measurements of attenuation signals and the calculation of concentrations of chromophores using a predetermined scatter law. The system comprises a continuous wave photon migration model calculator coupled to an optical source and detector for estimating concentrations of chromophores and scatter parameters used in image reconstruction.Type: ApplicationFiled: January 7, 2003Publication date: July 8, 2004Applicant: ART Advanced Research Technologies Inc.Inventor: David J. Hall
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Patent number: 6694159Abstract: The present invention relates to a method for wavelength selection in a multi-wavelength TPSF-based optical imaging system. This consists of identifying several chromophores in a highly turbid medium and selecting optimized wavelengths whereby using these wavelengths optimizes the deduction of the chromophore concentrations. Such chromophore concentrations may be combined to deduce other properties of the turbid medium.Type: GrantFiled: November 2, 2001Date of Patent: February 17, 2004Assignee: ART, Advanced Research Technologies Inc.Inventors: David Hall, Mathias Kohl-Bareis
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Patent number: 6678049Abstract: An optical imaging system for detecting light from an excitation light source through a scattering medium. The system includes a photo detector for receiving light from the scattering medium, an amplification circuit coupled from the photo-detector, an electro-optical source coupled from the amplification circuit for providing a secondary light signal, and a streak camera receiving the secondary light signal and providing an image of the scattering medium.Type: GrantFiled: January 25, 2002Date of Patent: January 13, 2004Assignee: ART, Advanced Research Technologies Inc.Inventor: Yves Painchaud
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Publication number: 20020167987Abstract: A mechanism is provided for detecting a defect in a populated sample having a thickness dimension substantially smaller than the length and width dimensions thereof, the populated sample having a first side and an opposite second side, at least said first side of said populated sample having one or more Surface Mounted Components.Type: ApplicationFiled: July 3, 2002Publication date: November 14, 2002Applicant: ART Advanced Research Technologies Inc.Inventors: Jerry Schlagheck, Marc Pastor
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Patent number: 6415172Abstract: The method for scanning a turbid medium involves displacing an optical signal source over a first face of the medium and a corresponding optical detector over an opposite face from one respective spatial location to another. Each spatial location is associated with a corresponding input region on the first face and a corresponding output region on the opposite second face. The optical detector in response to optical signals detected from each of the output regions generates a primary set of image data, secondary and/or tertiary image data by scanning the turbid medium using input regions and output regions of different sizes. The various sets of image data obtained may be manipulated in any manner, namely subjected to a data processing technique, so as to, for example, highlight the differences or similarities between the images.Type: GrantFiled: January 21, 2000Date of Patent: July 2, 2002Assignee: Art Advanced Research Technologies, Inc.Inventors: Yves Painchaud, Stéphane Chatigny, Michel Morin
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Patent number: 6332093Abstract: A scanning module for imaging through scattering media is provided. The scanning module image through scattering media while alleviating adverse effects of the weak transmission through highly scattering media. The injection of photons is optimized so that the overall transmission is increased compared to the conventional art. Cross-talk effects in a multi-port geometry are eliminated thereby increasing parallelism.Type: GrantFiled: August 6, 1998Date of Patent: December 18, 2001Assignee: Art Recherches et Technologies Avancees Inc./Art Advanced Research Technologies, Inc.Inventors: Yves Painchaud, Alain Mailloux