Patents by Inventor Saikat Saha

Saikat Saha 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: 10466320
    Abstract: Methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI) systems. In one embodiment, a radio frequency coil for a medical imaging device comprises: a first electroconductive section having a first end and an opposing, second end; and a first plurality of notches of the first electroconductive section extending from the first end to the second end across a centerline of the first electroconductive section. In this way, an amount electrical eddy currents produced within the electroconductive surfaces of the RF coil is reduced, thereby decreasing a temperature and vibration of the RF coil.
    Type: Grant
    Filed: August 17, 2017
    Date of Patent: November 5, 2019
    Assignee: General Electric Company
    Inventors: Saikat Saha, Masahiro Fujimoto, Micheal Edwards
  • Publication number: 20190334663
    Abstract: A retransmission method and a communication device configured to perform a retransmission method. The communication device can be configured to perform Dual-SIM-Dual-active operations using transmission toggling between wireless communication networks. The communication device can determine a transmission schedule of a first communication protocol. The communication device can also determine a retransmission threshold (e.g., maximum hybrid automatic repeat request retransmission threshold) of a second communication protocol. The communication device can determine a transmission count of the second communication protocol based on the transmission schedule. A scheduling request (SR)/buffer status report (BSR) can be initiated based on a comparison of the transmission count and the retransmission threshold. The SR/BSR can be initiated without a status PDU having been received.
    Type: Application
    Filed: June 22, 2016
    Publication date: October 31, 2019
    Inventors: Rishav Dev, Saikat Saha
  • Publication number: 20190056469
    Abstract: Methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI) systems. In one embodiment, a radio frequency coil for a medical imaging device comprises: a first electroconductive section having a first end and an opposing, second end; and a first plurality of notches of the first electroconductive section extending from the first end to the second end across a centerline of the first electroconductive section. In this way, an amount electrical eddy currents produced within the electroconductive surfaces of the RF coil is reduced, thereby decreasing a temperature and vibration of the RF coil.
    Type: Application
    Filed: August 17, 2017
    Publication date: February 21, 2019
    Inventors: Saikat Saha, Masahiro Fujimoto, Micheal Edwards
  • Publication number: 20190049535
    Abstract: A (MRI) system includes a RF coil assembly, a gradient coil assembly disposed around the RF coil assembly, the gradient coil assembly including a RF shield, and a superconducting magnet assembly disposed around the gradient coil assembly. The superconducting magnet assembly including a vessel containing a plurality of superconducting coils. The RF coil assembly including a plurality of RF coil elements applied on an outer surface of a hollow cylindrical RF coil former. The plurality of RF coil elements including a pair of end rings with a plurality of rungs positioned between the pair of end rings, a plurality of ground patches, and a plurality of RF cables. A shield of each of the plurality of RF cables is attached to a ground patch of the plurality of ground patches and each ground patch is capacitively coupled to the RF shield.
    Type: Application
    Filed: August 14, 2017
    Publication date: February 14, 2019
    Inventor: Saikat Saha
  • Publication number: 20190041475
    Abstract: A MRI system includes a RF coil assembly, a gradient coil assembly disposed around the RF coil assembly, the gradient coil assembly including a RF shield, and a superconducting magnet assembly disposed around the gradient coil assembly, the superconducting magnet assembly including a vessel containing a plurality of superconducting coils. The RF coil assembly includes a plurality of RF coil elements applied on an outer surface of a hollow cylindrical RF coil former. The plurality of RF coil elements includes a plurality of rungs and a plurality of ground patches that are connected. The plurality of ground patches are spaced apart from the RF shield with a dielectric material in between, and the plurality of ground patches are capacitively coupled to the RF shield. The RF coil assembly is a TEM RF body coil.
    Type: Application
    Filed: August 7, 2017
    Publication date: February 7, 2019
    Inventors: Saikat Saha, Zhentian Xie
  • Patent number: 10185019
    Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: January 22, 2019
    Assignee: GENERAL ELECTRIC COMPANY
    Inventors: Weijun Shen, Timothy John Havens, Longzhi Jiang, Saikat Saha, Benjamin Jacob Gronemeyer, Venkata Kishore Mogatadakala
  • Publication number: 20190011508
    Abstract: Methods and systems are provided for radio frequency (RF) coils for magnetic resonance imaging (MRI) systems. In one embodiment, an RF coil configured for an MRI system comprises a plurality of RF coil conductors, each RF coil conductor comprising a base side with two arms extending therefrom. In this way, the RF coil may efficiently generate magnetic fields with improved channel isolation while producing fewer annefact artifacts.
    Type: Application
    Filed: July 10, 2017
    Publication date: January 10, 2019
    Inventor: Saikat Saha
  • Publication number: 20180120395
    Abstract: An imaging apparatus is disclosed that includes an MRI system, either as a stand-alone system or hybrid PET-MRI system. The MRI system includes gradient coils positioned about a patient bore, an RF coil former comprising an inner surface and an outer surface, an RF shield positioned on the outer surface of the RF coil former so as to be formed about the RF coil former, and an RF coil positioned on the inner surface of the RF coil former and about the patient bore, with the RF coil coupled to a pulse generator to emit an RF pulse sequence and receive resulting MR signals from a subject of interest.
    Type: Application
    Filed: December 22, 2017
    Publication date: May 3, 2018
    Inventor: Saikat Saha
  • Patent number: 9498174
    Abstract: A PET-MR apparatus includes an MR imaging system having an RF coil former having inner and outer surfaces, an RF shield formed about the outer surface of the RF coil former, and an RF coil positioned on the inner surface of the RF coil former. The PET-MR apparatus also includes a PET system having a detector array positioned to encircle the bore to acquire PET emissions of the subject of interest and a plurality of RF power cables to provide power to the RF coil. The RF coil of the PET-MR apparatus comprises an RF body coil including a pair of end rings and a plurality of rungs extending between the end rings, wherein the plurality of RF power cables are coupled to one of the pair of end rings, along an outer edge of the one end ring distal from the plurality of rungs.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: November 22, 2016
    Assignee: General Electric Company
    Inventor: Saikat Saha
  • Publication number: 20160252598
    Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.
    Type: Application
    Filed: December 8, 2015
    Publication date: September 1, 2016
    Inventors: Weijun Shen, Timothy John Havens, Longzhi Jiang, Saikat Saha, Benjamin Jacob Gronemeyer, Venkata Kishore Mogatadakala
  • Patent number: 9322892
    Abstract: A system and method for magnetic field distortion compensation includes a cryostat for a magnetic resonance imaging (MRI) system. The cryostat includes a vacuum casing having a vacuum therein. A cryogen vessel is disposed within the casing, the vessel having a coolant therein. A thermal shield is disposed between the vacuum casing and the cryogen vessel. An eddy current compensation assembly is disposed within the casing. The eddy current compensation assembly includes a plurality of electrically conductive loops formed on one of the vacuum casing, the cryogen vessel, and the thermal shield and constructed to mitigate vibration-induced eddy currents in the MRI system.
    Type: Grant
    Filed: December 24, 2012
    Date of Patent: April 26, 2016
    Assignee: General Electric Company
    Inventors: Weijun Shen, Timothy John Havens, Longzhi Jiang, Saikat Saha, Benjamin Jacob Gronemeyer, Venkata Kishore Mogatadakala
  • Publication number: 20150005616
    Abstract: An imaging apparatus is disclosed that includes an MRI system, either as a stand-alone system or hybrid PET-MRI system. The MRI system includes gradient coils positioned about a patient bore, an RF coil former comprising an inner surface and an outer surface, an RF shield positioned on the outer surface of the RF coil former so as to be formed about the RF coil former, and an RF coil positioned on the inner surface of the RF coil former and about the patient bore, with the RF coil coupled to a pulse generator to emit an RF pulse sequence and receive resulting MR signals from a subject of interest. The RF shield includes a plurality of slits formed therein configured to disrupt the formation of gradient field induced eddy currents on the RF shield, so as to prevent the generation of high temperature profiles on the surface of the shield.
    Type: Application
    Filed: June 26, 2013
    Publication date: January 1, 2015
    Inventor: Saikat Saha
  • Patent number: 8884620
    Abstract: An RF body coil having enhanced acoustic deadening properties for an MR scanning apparatus is disclosed. The RF body coil includes an RF support form and RF electronics affixed to the RF support form, with the RF electronics comprising a plurality of RF legs. The RF support form further includes an inner structural layer, an outer structural layer, and a middle layer sandwiched between the inner structural layer and the outer structural layer, the middle layer comprising a layer of viscoelastic material configured to increase the mechanical damping of the RF body coil so as to reduce RF body coil vibration.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: November 11, 2014
    Assignee: General Electric Company
    Inventors: Washington de Lima, Timothy John Havens, Saikat Saha, Tesfaye Kebede Kidane
  • Publication number: 20140187909
    Abstract: A PET-MR apparatus includes an MR imaging system having an RF coil former having inner and outer surfaces, an RF shield formed about the outer surface of the RF coil former, and an RF coil positioned on the inner surface of the RF coil former. The PET-MR apparatus also includes a PET system having a detector array positioned to encircle the bore to acquire PET emissions of the subject of interest and a plurality of RF power cables to provide power to the RF coil. The RF coil of the PET-MR apparatus comprises an RF body coil including a pair of end rings and a plurality of rungs extending between the end rings, wherein the plurality of RF power cables are coupled to one of the pair of end rings, along an outer edge of the one end ring distal from the plurality of rungs.
    Type: Application
    Filed: December 27, 2012
    Publication date: July 3, 2014
    Applicant: General Electric Company
    Inventor: Saikat Saha
  • Patent number: 8710842
    Abstract: An apparatus and method to reduce noise in magnetic resonance imaging (MRI) systems are provided. One MRI system includes a gantry having a bore therethrough and at least one radio frequency (RF) coil supported by the gantry for imaging an object within the bore. The MRI system also includes a vacuum space between the at least one RF coil and the bore.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: April 29, 2014
    Assignee: General Electric Company
    Inventors: Saikat Saha, Timothy John Havens, Washington de Lima
  • Patent number: 8704520
    Abstract: A radio frequency (RF) coil for a magnetic resonance imaging (MRI) system includes a first end ring, a second end ring, and a plurality of rungs electrically coupled between the first and second end rings, each rung including a first rung portion formed from a plurality of conductors and a second rung portion formed from a single solid conductor. A resonance assembly for a magnetic resonance imaging (MRI) system and an MRI imaging system are also described herein.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: April 22, 2014
    Assignee: General Electric Company
    Inventors: Saikat Saha, Thomas Kwok-fah Foo, Bruce Courtney Campbell Amm, Jean-Baptiste Mathieu, Robert Arvin Hedeen
  • Patent number: 8487621
    Abstract: An MRI apparatus and method is disclosed comprising a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly to acquire MR images. The RF coil assembly comprises an RF tube, a plurality of electrically conductive members disposed around the RF tube and configured to transmit RF excitation pulses, a plurality of electrical components coupled to the electrically conductive members, and at least one thermally conductive substrate mounted upon the RF tube, wherein one of the plurality of electrically conductive members and the plurality of electrical components is mounted to the at least one thermally conductive substrate and is in thermal contact therewith.
    Type: Grant
    Filed: September 14, 2010
    Date of Patent: July 16, 2013
    Assignee: General Electric Company
    Inventors: Saikat Saha, Longzhi Jiang, Timothy John Havens
  • Publication number: 20120293173
    Abstract: An RF body coil having enhanced acoustic deadening properties for an MR scanning apparatus is disclosed. The RF body coil includes an RF support form and RF electronics affixed to the RF support form, with the RF electronics comprising a plurality of RF legs. The RF support form further includes an inner structural layer, an outer structural layer, and a middle layer sandwiched between the inner structural layer and the outer structural layer, the middle layer comprising a layer of viscoelastic material configured to increase the mechanical damping of the RF body coil so as to reduce RF body coil vibration.
    Type: Application
    Filed: May 16, 2011
    Publication date: November 22, 2012
    Inventors: Washington de Lima, Timothy John Havens, Saikat Saha, Tesfaye Kebede Kidane
  • Publication number: 20120229138
    Abstract: An apparatus and method to reduce noise in magnetic resonance imaging (MRI) systems are provided. One MRI system includes a gantry having a bore therethrough and at least one radio frequency (RF) coil supported by the gantry for imaging an object within the bore. The MRI system also includes a vacuum space between the at least one RF coil and the bore.
    Type: Application
    Filed: March 7, 2011
    Publication date: September 13, 2012
    Inventors: SAIKAT SAHA, TIMOTHY JOHN HAVENS, WASHINGTON de LIMA
  • Publication number: 20120146643
    Abstract: A radio frequency (RF) coil for a magnetic resonance imaging (MRI) system includes a first end ring, a second end ring, and a plurality of rungs electrically coupled between the first and second end rings, each rung including a first rung portion formed from a plurality of conductors and a second rung portion formed from a single solid conductor. A resonance assembly for a magnetic resonance imaging (MRI) system and an MRI imaging system are also described herein.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 14, 2012
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: SAIKAT SAHA, THOMAS KWOK-fah FOO, BRUCE COURTNEY CAMPBELL AMM, JEAN-BAPTISTE MATHIEU, ROBERT ARVIN HEDEEN