Patents by Inventor Parag Karmarkar
Parag Karmarkar 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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Publication number: 20240130783Abstract: The present disclosure provides a system with an innovative electrode designed as an RF/microwave antenna as well as methods to monitor/assess biological tissue and perform surgical procedures.Type: ApplicationFiled: November 28, 2023Publication date: April 25, 2024Inventor: Parag Karmarkar
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Patent number: 11857253Abstract: The present disclosure provides a system with an innovative electrode designed as an RF/microwave antenna as well as methods to monitor/assess biological tissue and perform surgical procedures.Type: GrantFiled: January 8, 2021Date of Patent: January 2, 2024Assignee: The Johns Hopkins UniversityInventor: Parag Karmarkar
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Publication number: 20210145513Abstract: The present disclosure provides a system with an innovative electrode designed as an RF/microwave antenna as well as methods to monitor/assess biological tissue and perform surgical procedures.Type: ApplicationFiled: January 8, 2021Publication date: May 20, 2021Inventor: Parag Karmarkar
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Patent number: 10888374Abstract: The present disclosure provides a system with an innovative electrode designed as an RF/microwave antenna as well as methods to monitor/assess biological tissue and perform surgical procedures.Type: GrantFiled: July 8, 2016Date of Patent: January 12, 2021Assignee: The Johns Hopkins UniversityInventor: Parag Karmarkar
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Publication number: 20180214204Abstract: The present disclosure provides a system with an innovative electrode designed as an RF/microwave antenna as well as methods to monitor/assess biological tissue and perform surgical procedures.Type: ApplicationFiled: July 8, 2016Publication date: August 2, 2018Inventor: Parag Karmarkar
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Patent number: 9423475Abstract: An elongate electrical lead assembly that reduces localized heating due to MR scanner-induced currents includes a first elongate electrical lead having a series of alternating single layer coil sections and multi-layer coil sections, a second elongate electrical lead having a series of alternating single layer coil sections and multi-layer coil sections, and a third elongate electrical lead having a coiled section that coaxially surrounds the first and second electrical leads. Each multi-layer coil section of the second electrical lead is coiled around a respective single layer coil section of the first electrical lead, and each single layer coil section of the second electrical lead is coiled around a respective multi-layer coil section of the first electrical lead.Type: GrantFiled: March 13, 2013Date of Patent: August 23, 2016Assignee: MRI Interventions, Inc.Inventors: Parag Karmarkar, Rajesh Pandey
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Publication number: 20140266207Abstract: An elongate electrical lead assembly that reduces localized heating due to MR scanner-induced currents includes a first elongate electrical lead having a series of alternating single layer coil sections and multi-layer coil sections, a second elongate electrical lead having a series of alternating single layer coil sections and multi-layer coil sections, and a third elongate electrical lead having a coiled section that coaxially surrounds the first and second electrical leads. Each multi-layer coil section of the second electrical lead is coiled around a respective single layer coil section of the first electrical lead, and each single layer coil section of the second electrical lead is coiled around a respective multi-layer coil section of the first electrical lead.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: MRI INTERVENTIONS, INC.Inventors: Parag Karmarkar, Rajesh Pandey
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Patent number: 7918819Abstract: Disclosed is a deflectable tip guiding device, such as a catheter, that enables a physician, or other health care personnel, to vary the radius of curvature of the tip of the device. In one embodiment, a guiding device includes an elongate body and a deflectable distal tip. An elongate stiffener tube is coupled to the body for longitudinal movement relative thereto and has a distal end spaced a variable distance from the distal end of the tip, thereby serving as a fulcrum for the tip. Longitudinal movement of the stiffener tube relative to the body varies the distance between the distal ends of the tip and tube, which in turn causes a corresponding increase or decrease in the radius of curvature of the tip.Type: GrantFiled: November 14, 2003Date of Patent: April 5, 2011Assignee: Health & Human Services - NIHInventors: Parag Karmarkar, Robert J. Lederman
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Patent number: 7848788Abstract: Herein is disclosed a magnetic resonance imaging probe, having a probe shaft including a magnetic resonance antenna, and a spring tip attached to a distal end of the antenna.Type: GrantFiled: April 11, 2002Date of Patent: December 7, 2010Assignees: The Johns Hopkins University, SurgiVision, Inc.Inventors: Steve Tulley, Albert C. Lardo, Parag Karmarkar, Elliot McVeigh, Henry R. Halperin, Christine Enger McNamara, Paul A. Bottomley, Ergin Atalar, Xiaoming Yang
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Patent number: 7599729Abstract: Systems and methods for the evaluation of the urethra and periurethral tissues may involve an MRI coil adapted for insertion into the male, female or pediatric urethra. The MRI coil may be in electrical communication with an interface circuit made up of a tuning-matching circuit, a decoupling circuit and a balun circuit. The interface circuit may also be in electrical communication with a MRI machine. In certain practices, the present invention provides methods for the diagnosis and treatment of conditions involving the urethra and periurethral tissues, including disorders of the female pelvic floor, conditions of the prostate and anomalies of the pediatric pelvis.Type: GrantFiled: May 24, 2005Date of Patent: October 6, 2009Assignees: The Johns Hopkins University, SurgiVision, Inc.Inventors: Ergin Atalar, Harald Hartmut Quick, Parag Karmarkar
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Publication number: 20080039709Abstract: In vivo medical stimulation probes include an elongate lead having at least one stimulation electrode disposed on a distal portion thereof. The probes may include a plurality of axially spaced apart RF chokes disposed on and/or in an axially extending shielding layer of the lead in advance of the at least one electrode to inhibit induced RF current from forming and/or traveling along the shielding layer.Type: ApplicationFiled: August 9, 2005Publication date: February 14, 2008Inventor: Parag Karmarkar
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Patent number: 7133714Abstract: A magnetic resonance probe may include a plurality of center conductors, at least some center conductors including a conductive core and an insulator disposed at least partially about the core along at least a portion of the core, a first dielectric layer disposed at least partially about the plurality of center conductors in a proximal portion of the probe, an outer conductive layer at least partially disposed about the first dielectric layer, and a plurality of electrodes, at least one electrode being coupled to one of the center conductors and disposed at least partly on a probe surface.Type: GrantFiled: June 7, 2005Date of Patent: November 7, 2006Assignee: Surgi-Vision, Inc.Inventors: Parag Karmarkar, Ingmar Viohl
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Publication number: 20060142732Abstract: Disclosed is a deflectable tip guiding device, such as a catheter, that enables a physician, or other health care personnel, to vary the radius of curvature of the tip of the device. In one embodiment, a guiding device includes an elongate body and a deflectable distal tip. An elongate stiffener tube is coupled to the body for longitudinal movement relative thereto and has a distal end spaced a variable distance from the distal end of the tip, thereby serving as a fulcrum for the tip. Longitudinal movement of the stiffener tube relative to the body varies the distance between the distal ends of the tip and tube, which in turn causes a corresponding increase or decrease in the radius of curvature of the tip.Type: ApplicationFiled: November 14, 2003Publication date: June 29, 2006Inventors: Parag Karmarkar, Robert Lederman
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Publication number: 20060122493Abstract: Systems and methods for the evaluation of the urethra and periurethral tissues may involve an MRI coil adapted for insertion into the male, female or pediatric urethra. The MRI coil may be in electrical communication with an interface circuit made up of a tuning-matching circuit, a decoupling circuit and a balun circuit. The interface circuit may also be in electrical communication with a MRI machine. In certain practices, the present invention provides methods for the diagnosis and treatment of conditions involving the urethra and periurethral tissues, including disorders of the female pelvic floor, conditions of the prostate and anomalies of the pediatric pelvis.Type: ApplicationFiled: May 24, 2005Publication date: June 8, 2006Applicants: Surgi-Vision, Inc., John Hopkins University School of MedicineInventors: Ergin Atalar, Harald Quick, Parag Karmarkar
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Publication number: 20060119361Abstract: A magnetic resonance probe may include a plurality of center conductors, at least some center conductors including a conductive core and an insulator disposed at least partially about the core along at least a portion of the core, a first dielectric layer disposed at least partially about the plurality of center conductors in a proximal portion of the probe, an outer conductive layer at least partially disposed about the first dielectric layer, and a plurality of electrodes, at least one electrode being coupled to one of the center conductors and disposed at least partly on a probe surface.Type: ApplicationFiled: June 7, 2005Publication date: June 8, 2006Applicant: Surgi-Vision, Inc.Inventors: Parag Karmarkar, Ingmar Viohl
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Publication number: 20060106303Abstract: Disclosed is a guide catheter that includes one or more RF antennas to enhance the visibility of the guide catheter in MR imagery. One embodiment of the guide catheter includes a loop coil at the distal end of the guide catheter and a loopless antenna between the distal end and the proximal end. By combining a loop coil and a loopless antenna on the catheter, the shaft of the catheter may be visible in MR imagery while the distal end may appear in the MR imagery more brightly than the shaft.Type: ApplicationFiled: May 18, 2005Publication date: May 18, 2006Applicant: THE JOHNS HOPKINS UNIVERSITYInventors: Parag Karmarkar, Ergin Atalar, Robert Lederman, Amish Raval
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Patent number: 6904307Abstract: A magnetic resonance probe may include a plurality of center conductors, at least some center conductors including a conductive core and an insulator disposed at least partially about the core along at least a portion of the core, a first dielectric layer disposed at least partially about the plurality of center conductors in a proximal portion of the probe, an outer conductive layer at least partially disposed about the first dielectric layer, and a plurality of electrodes, at least one electrode being coupled to one of the center conductors and disposed at least partly on a probe surface.Type: GrantFiled: May 29, 2003Date of Patent: June 7, 2005Assignee: Surgi-Vision, Inc.Inventors: Parag Karmarkar, Ingmar Viohl
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Patent number: 6898454Abstract: The present invention provides systems and methods for the evaluation of the urethra and periurethral tissues using an MRI coil adapted for insertion into the male, female or pediatric urethra. The MRI coil may be in electrical communication with an interface circuit made up of a tuning-matching circuit, a decoupling circuit and a balun circuit. The interface circuit may also be in electrical communication with a MRI machine. In certain practices, the present invention provides methods for the diagnosis and treatment of conditions involving the urethra and periurethral tissues, including disorders of the female pelvic floor, conditions of the prostate and anomalies of the pediatric pelvis.Type: GrantFiled: April 2, 2001Date of Patent: May 24, 2005Assignees: The Johns Hopkins University, Surgi-Vision, Inc.Inventors: Ergin Atalar, Harald Hartmann Quick, Parag Karmarkar
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Patent number: RE42856Abstract: A magnetic resonance probe may include a plurality of center conductors, at least some center conductors including a conductive core and an insulator disposed at least partially about the core along at least a portion of the core, a first dielectric layer disposed at least partially about the plurality of center conductors in a proximal portion of the probe, an outer conductive layer at least partially disposed about the first dielectric layer, and a plurality of electrodes, at least one electrode being coupled to one of the center conductors and disposed at least partly on a probe surface.Type: GrantFiled: June 6, 2007Date of Patent: October 18, 2011Assignee: MRI Interventions, Inc.Inventors: Parag Karmarkar, Ingmar Viohl
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Patent number: RE44736Abstract: A magnetic resonance probe may include a plurality of center conductors, at least some center conductors including a conductive core and an insulator disposed at least partially about the core along at least a portion of the core, a first dielectric layer disposed at least partially about the plurality of center conductors in a proximal portion of the probe, an outer conductive layer at least partially disposed about the first dielectric layer, and a plurality of electrodes, at least one electrode being coupled to one of the center conductors and disposed at least partly on a probe surface.Type: GrantFiled: February 15, 2011Date of Patent: January 28, 2014Assignee: MRI Interventions, Inc.Inventors: Parag Karmarkar, Ingmar Viohl