Search Patents
  • Magnet structure
    Patent number: 7116197
    Abstract: A magnet structure produces a field within a magnet gap. The field is provided at least in part by a pair of permanent magnets that are fixed in place by a frame. The frame fixes a magnet assembly that is adapted to hold the magnetic material composing the permanent magnets, such that the quantity of the magnetic material can be adjusted to suit the particular application. The magnetic material can be provided in the form of discrete magnetic elements, such as magnetic “bricks”. The frame also functions as the flux collector and return. Accordingly, the general geometry of the magnet structure is fixed, and the amount of magnetic material, and therefore the magnetic field strength, is adjustable.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: October 3, 2006
    Assignee: Fonar Corporation
    Inventors: Gordon Danby, John Jackson, Raymond Damadian, William H. Wahl, Anthony Tenore
  • Magnet structure
    Patent number: 6982620
    Abstract: A magnet structure produces a field within a magnet gap. The field is provided at least in part by a pair of permanent magnets that are fixed in place by a frame. The frame fixes a magnet assembly that is adapted to hold the magnetic material composing the permanent magnets, such that the quantity of the magnetic material can be adjusted to suit the particular application. The magnetic material can be provided in the form of discrete magnetic elements, such as magnetic “bricks”. The frame also functions as the flux collector and return. Accordingly, the general geometry of the magnet structure is fixed, and the amount of magnetic material, and therefore the magnetic field strength, is adjustable.
    Type: Grant
    Filed: November 23, 2001
    Date of Patent: January 3, 2006
    Assignee: Fonar Corporation
    Inventors: Gordon Danby, John Jackson, Raymond Damadian, William H. Wahl, Anthony Tenore
  • Magnetic resonance imaging apparatus having moving magnets
    Patent number: 7102353
    Abstract: An apparatus and method for magnetic resonance imaging comprising a magnet and means for vertically moving the magnet so as to obtain an image of a portion of a patient's anatomy.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: September 5, 2006
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • MRI antenna
    Patent number: 7573432
    Abstract: In one example, an antenna is disclosed comprising a first, outer conductor, at least one inner conductor within the first outer conductor, and a second outer conductor surrounding the first outer conductor. The second outer conductor may define a plurality of holes therethrough. The at least one inner conductor may comprise a plurality of inner conductors. At least two of the plurality of inner conductors may be connected to each other in series, across a capacitor. At least two of the plurality of inner conductors may be connected to each other in parallel, across a capacitor. The at least one inner conductor may be sufficiently surrounded by the first outer conductor to shield the inner conductor from receiving a radiofrequency signal.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: August 11, 2009
    Assignee: Fonar Corporation
    Inventors: Gregory Eydelman, Raymond Damadian, Anthony Giambalvo
  • Nuclear magnetic resonance apparatus and methods of use and facilities for incorporating the same
    Patent number: 6150820
    Abstract: NMR apparatus for achieving construction of improved patient access. Facilities and methods of mobile and fixed site scanning.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: November 21, 2000
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Gordon T. Danby, Hank Hsieh, Terry Morrone
  • Nuclear magnetic resonance apparatus and methods of use and facilities for incorporating the same
    Patent number: 6400156
    Abstract: NMR apparatus for achieving construction of improved patient access. Facilities and methods of mobile and fixed site scanning.
    Type: Grant
    Filed: February 1, 1999
    Date of Patent: June 4, 2002
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Gordon T. Danby, John W. Jackson, Hank Hsieh, Terry Morrone
  • Ferromagnetic frame magnet with superconducting coils
    Publication number: 20080036463
    Abstract: A magnetic resonance imaging magnet includes a ferromagnetic frame. A pair of generally toroidal superconducting coil units overlie interfaces of side walls incorporated in the frame. Each coil unit may include a vessel having hollow support extensions extending into recesses in the side walls. The coil units may further include elongated, low-thermal conductance supports disposed within the support extensions. The frame may include pole stems projecting inwardly from the side walls, and the coils may be disposed in close proximity to the pole stems. Cryocoolers may be mounted to the frame so that the cryocoolers are substantially mechanically isolated from the coils of the coil units, but are in thermal communication therewith. The cryocooler mountings may be arranged for convenient servicing and installation of the cryocoolers.
    Type: Application
    Filed: August 14, 2006
    Publication date: February 14, 2008
    Applicant: Fonar Corporation
    Inventors: Hank Hsieh, Gordon Danby, Raymond Damadian, John Jackson, Hugh Wahl, Cristian Balica
  • Nuclear magnetic resonance scanners
    Patent number: 4766378
    Abstract: A medical nuclear magnetic resonance system is provided with a primary field magnet assembly having a ferromagnetic frame. The system resists field variations caused by coil movement and confines the field within the frame.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: August 23, 1988
    Assignee: Fonar Corporation
    Inventors: Gordon T. Danby, Hank C. H. Hsieh, John W. Jackson, Raymond V. Damadian
  • Shim pieces for a magnetic resonance imaging magnet
    Patent number: 7193494
    Abstract: A method for producing a shim piece for a magnetic resonance imaging (MRI) magnet. The shim piece is used to form a shim of a magnet and is designed to suppress eddy currents in the shim created by the introduction of a gradient magnetic field. The shim piece is formed by a plurality of ferromagnetic rods placed side-by-side and surrounded by a dielectric material.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: March 20, 2007
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Patient movement during image guided surgery
    Patent number: 6249695
    Abstract: A interventional procedure is performed by advancing a probe into a patient and periodically acquiring magnetic resonance images depicting the probe and adjacent portions of the patient's body. The patient, or a part of the patient, is reoriented during the procedure to facilitate advancement of the probe as, for example, by changing the position or orientation of internal organs.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: June 19, 2001
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Method for making pieces for a magnetic resonance imaging magnet
    Patent number: 6973711
    Abstract: A method for producing a shim piece for a magnetic resonance imaging (MRI) magnet. The shim piece is used to form a shim of a magnet and is designed to suppress eddy currents in the shim created by the introduction of a gradient magnetic field. The shim piece is formed by a plurality of ferromagnetic rods placed side-by-side and surrounded by a dielectric material.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: December 13, 2005
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Breast positioning device for use during magnetic resonance imaging
    Patent number: 5664569
    Abstract: An apparatus for use during Magnetic Resonance imaging of a patient's breast region including a positioning device and an elongated radio frequency conductor. The breast positioning device contains a permanent cavity. The elongated conductor has a portion disposed within the cavity and a second portion extending around the torso region of the patient.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: September 9, 1997
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Jan Votruba
  • Inductively coupled dedicated RF coils for MRI
    Patent number: 5583438
    Abstract: A primary tuned circuit and a secondary tuned circuit are inductively coupled. Primary and secondary inductors of the tuned circuits each exhibit a respective region of sufficiently uniform sensitivity for MRI studies. Both the primary and secondary inductors receive, in use, an MRI signal directly from a subject to be imaged.
    Type: Grant
    Filed: July 11, 1991
    Date of Patent: December 10, 1996
    Assignee: Fonar Corporation
    Inventors: Gregory I. Eydelman, Anthony Giambalvo, Raymond V. Damadian
  • Remotely steerable guide wire with external control wires
    Patent number: 6165139
    Abstract: Patient treatment is carried out under magnetic resonance imaging (MRI) guidance. The treated region of anatomy may be a joint, an organ or other tissue, or a tumor. Instruments which can be guided by MRI allow the treated region of anatomy to be reached along a selected path, curved or straight, to reduce tissue injury. The delivery of treatments under MRI guidance and monitoring provides a method of identifying a preferred treatment regimen.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: December 26, 2000
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Apparatus and method for nuclear magnetic resonance scanning and mapping
    Patent number: 4354499
    Abstract: An improved apparatus and method for analyzing the chemical and structural composition of a specimen including whole-body specimens which may include, for example, living mammals, utilizing nuclear magnetic resonance (NMR) techniques. A magnetic field space necessary to obtain an NMR signal characteristic of the chemical structure of the specimen is focused to provide a resonance domain of selectable size, which may then be moved in a pattern with respect to the specimen to scan the specimen.
    Type: Grant
    Filed: November 20, 1978
    Date of Patent: October 19, 1982
    Inventor: Raymond V. Damadian
  • Magnetic resonance imaging method and apparatus for guiding invasive therapy
    Patent number: 5647361
    Abstract: Patient treatment is carried out under magnetic resonance imaging (MRI) guidance. The treated region of anatomy may be a joint, an organ or other tissue, or a tumor. Instruments which can be guided by MRI allow the treated region of anatomy to be reached along a selected path, curved or straight, to reduce issue injury. The delivery of treatments under MRI guidance and monitoring provides a method of identifying a preferred treatment regimen.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: July 15, 1997
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Apparatus and method for nuclear magnetic resonance scanning and mapping
    Patent number: 4411270
    Abstract: An improved apparatus and method for analyzing the chemical and structural composition of a specimen including whole-body specimens which may include, for example, living mammals, utilizing nuclear magnetic resonance (NMR) techniques. A magnetic field space necessary to obtain an NMR signal characteristic of the chemical structure of the specimen is focused to provide a resonance domain of selectable size, which may then be moved in a pattern with respect to the specimen to scan the specimen.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: October 25, 1983
    Inventor: Raymond V. Damadian
  • Magnetic resonance imaging system and method for detecting chiari malformations
    Patent number: 8401612
    Abstract: A method for detecting Chiari malformations. The method generally comprises positioning a patient in an upright orientation in a patient-receiving space of a magnetic resonance imaging apparatus and acquiring images of the patient's cerebellum and brainstem in the upright orientation. The method further comprises positioning the patient in a recumbent orientation in the patient-receiving space of the magnetic resonance imaging apparatus and acquiring images of the patient's cerebellum and brainstem in the recumbent orientation.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: March 19, 2013
    Assignee: Fonar Corporation
    Inventors: Ki-Cheung Chu, Raymond V. Damadian, Daniel Culver
  • Magnetic resonance imaging
    Patent number: 9575152
    Abstract: An MRI apparatus employs a magnet for establishing a B0 field, one or more imaging radiofrequency coils for creating a B1 field, and one or more nulling radiofrequency coils. The RF energy emitted by the nulling radiofrequency coils may be configured such that it disrupts the nuclear magnetic resonance signals emitted by nuclei excited by the B1 field. In addition, the nulling radiofrequency coils may be calibrated to be 180° out of phase such that the RF energy emitted by a pair of nulling radiofrequency coils is cancelled at a location between them.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: February 21, 2017
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Apparatus and method for nuclear magnetic resonance scanning and mapping
    Patent number: RE32619
    Abstract: An improved apparatus and method for analyzing the chemical and structural composition of a specimen including whole-body specimens which may include, for example, living mammals, utilizing nuclear magnetic resonance (NMR) techniques. A magnetic field space necessary to obtain an NMR signal characteristic of the chemical structure of the specimen is focused to provide a resonance domain of selectable size, which may then be moved in a pattern with respect to the specimen to scan the specimen.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: March 8, 1988
    Inventor: Raymond V. Damadian
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