Search Patents
  • Positional magnetic resonance imaging
    Patent number: 8111067
    Abstract: A patient is examined by magnetic resonance imaging in different positions relative to gravity by moving the patient relative to the magnet, and the acquired data is compared to show differences in anatomy due to differences in patient position. Individual data elements or groups of plural data elements representing particular locations in one set of image data can be compared with data elements associated with the same locations in another set of image data, to yield a set of comparison image data elements. The comparison data set can be used to detect difference caused by differences in position of the patient.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: February 7, 2012
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Robert Wolf
  • Multipositional MRI for kinematic studies of movable joints
    Patent number: 5724970
    Abstract: Methods and apparatus for kinematic studies of the movable joints of the body using magnetic resonance imaging. The apparatus controls the position of movable joints at a multiplicity of predetermined positions, enabling the controlled movement of the joints to each of the predetermined positions. It also includes a device which automatically sequences the movement of a movable joint to each position among the multiplicity of predetermined positions, and the acquisition of magnetic resonance imaging data at each of these positions. These features enhance the clinical utility of kinematic studies of movable joint functionality by magnetic resonance imaging.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: March 10, 1998
    Assignee: Fonar Corporation
    Inventors: Jan Votruba, Rajendra Shenoy, Raymond V. Damadian
  • Multipositional MRI for kinematic studies of movable joints
    Patent number: 5899859
    Abstract: Methods and apparatus for kinematic studies of the movable joints of the body using magnetic resonance imaging. The apparatus controls the position of movable joints at a multiplicity of predetermined positions, enabling the controlled movement of the joints to each of the predetermined positions. It also includes a device which automatically sequences the movement of a movable joint to each position among the multiplicity of predetermined positions, and the acquisition of magnetic resonance imaging data at each of these positions. These features enhance the clinical utility of kinematic studies of movable joint functionality by magnetic resonance imaging.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 4, 1999
    Assignee: Fonar Corporation
    Inventors: Jan Votruba, Rajendra Shenoy, Raymond V. Damadian
  • Magnetic resonance imaging system
    Patent number: 9632153
    Abstract: A magnetic resonance imaging configuration, system and method to straighten and otherwise homogenize the field lines in the imaging portion, creating improved image quality. Through use of calibrated corrective coils, magnetic field lines can be manipulated to improve uniformity and image quality. Additionally, when the apparatus is composed of non-ferromagnetic materials, field strengths can be increased to overcome limitations of Iron-based systems such as by use of superconductivity. A patient positioning apparatus allows multi-positioning of a patient within the calibrated and more uniform magnetic field lines.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: April 25, 2017
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Gordon T. Danby, Hank Hsieh, John W. Jackson, Mark Gelbien, William H. Wahl, Charles A. Green
  • Composite MRI antenna with reduced stray capacitance
    Patent number: 6028429
    Abstract: An antenna system for a magnetic resonance imaging apparatus has an active coil connected between a transmitter or receiver and ground and also has an isolated loop coil which is not conductively connected to ground. The isolated loop coil preferably overlies the electrically conductive pole surface of the field magnet. The isolated loop coil is inductively coupled to the active coil. The assembly has relatively low parasitic capacitance to ground and hence can be tuned to the resonant frequencies required for high field strength imaging.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: February 22, 2000
    Assignee: Fonar Corporation
    Inventors: Charles Green, Jan Votruba, Gregory Eydelman, Raymond V. Damadian
  • Magnetic resonance imaging method and apparatus
    Patent number: 10852375
    Abstract: A magnetic resonance imaging configuration and methodology to straighten and otherwise homogenize the field lines in the imaging portion, creating improved image quality. Through use of calibrated corrective coils, magnetic field lines can be manipulated to improve uniformity and image quality. Additionally, when the apparatus is composed of non-ferromagnetic materials, field strengths can be increased to overcome limitations of Iron-based systems such as by use of superconductivity. A patient positioning apparatus and methodology allows multi-positioning of a patient within the calibrated and more uniform magnetic field lines.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: December 1, 2020
    Assignee: FONAR Corporation
    Inventors: Raymond V. Damadian, Gordon T. Danby, Hank Hsieh, John W. Jackson, Mark Gelbien, William H. Wahl, Charles A. Green
  • Nuclear magnetic resonance apparatus including permanent magnet configuration
    Patent number: 4675609
    Abstract: An apparatus for nuclear magnetic resonance scanning and imaging which employs a primary magnetic field, an rf field, and a detector for detecting a nuclear magnetic resonance signal, the primary magnetic field being produced by an assembly of relatively low energy flux magnetic material combined with an assembly of relatively high energy flux magnetic material. The magnetic flux of the relatively low energy flux magnetic material is concentrated in a magnetic flux conductor means which is in turn combined with the magnetic flux of the relatively high energy flux magnetic material and is concentrated at a pole piece.
    Type: Grant
    Filed: March 20, 1986
    Date of Patent: June 23, 1987
    Assignee: Fonar Corporation
    Inventors: Gordon T. Danby, Raymond V. Damadian, Lawrence A. Minkoff
  • Magnetic resonance imaging
    Patent number: 10436864
    Abstract: The present disclosure is directed to an apparatus for imaging a subject using MR imaging, and a method of exciting nuclei of the subject within an imaging plane using one or more transmitter circuits tuned to a first transmission frequency, sampling MR signals generated from the nuclei at the same time using one or more receiver circuits each receiver circuit having a bandwidth less than 500 kHz, and generating a MR image based on the sampled MR signals. The speed of MR imaging may be increased by providing multiple pairs of transmitter and receiver circuits to operate simultaneously on an imaging plane and/or by streamlining downstream signal processing using multiple phase detectors tuned to detect frequencies associated with particular phase shifts.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: October 8, 2019
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Temporal magnetic resonance imaging
    Patent number: 8036730
    Abstract: A patient is subjected to magnetic resonance imaging at substantial intervals such as weeks, months or years, or after an interval sufficient for a therapeutic regimen to affect the anatomy, and the data acquired at different times is compared to show changes in the anatomy with time or due to the effects of the therapeutic regimen. Individual data elements or larger groups of plural data elements representing particular locations a set of image data acquired at one time can be automatically compared with data elements associated with the same locations in another set of image data acquired at another time to yield a set of comparison data.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: October 11, 2011
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Anthony J. Giambalvo
  • Magnetic resonance imaging
    Patent number: 9709648
    Abstract: The present disclosure is directed to an apparatus for imaging a subject using MR imaging, and a method of exciting nuclei of the subject within an imaging plane using one or more transmitter circuits tuned to a first transmission frequency, sampling MR signals generated from the nuclei at the same time using one or more receiver circuits each receiver circuit having a bandwidth less than 500 kHz, and generating a MR image based on the sampled MR signals. The speed of MR imaging may be increased by providing multiple pairs of transmitter and receiver circuits to operate simultaneously on an imaging plane and/or by streamlining downstream signal processing using multiple phase detectors tuned to detect frequencies associated with particular phase shifts.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: July 18, 2017
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • Method and system for monitoring effectiveness of a treatment regimen
    Patent number: 11317860
    Abstract: A method and system for assessing the effectiveness of a treatment regimen. In a preferred embodiment, baseline magnetic resonance imaging signals of a diseased portion of a subject's anatomy are acquired and image slices associated with diseased tissue or a selected region of interest are identified. The identified image slices are then stored and used in acquiring subsequent magnetic resonance imaging signals. The baseline and subsequently acquired magnetic resonance imaging signals are then processed to determine changes in location, size or other factors that provide an indication of whether treatment is effective. In another aspect, baseline and subsequent magnetic resonance parameters are also acquired and compared as part of determining the effective of treatment.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: May 3, 2022
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • MRI test fixture
    Publication number: 20090167305
    Abstract: In one example, a magnetic resonance imaging (“MRI”) system comprises a magnetic resonance imaging assembly defining a gap region, a transmitting coil proximate the gap region, and at least one test coil separate from the transmitting coil. The at least one coil is mechanically coupled to the assembly during imaging and the at least one test coil is selectively electrically coupled to the assembly to collect test data. The at least one coil may be coupled to a test fixture coupled to the assembly. The test fixture may be deployable from a first position to a second position for collection of test data. The at least one coil may comprise a first test coil and a second test coil. Methods are also disclosed.
    Type: Application
    Filed: December 9, 2008
    Publication date: July 2, 2009
    Inventors: Raymond V. Damadian, Hugh Wahl, Rein Aspelund, James Kelly
  • Magnetic resonance imaging apparatus
    Patent number: 9244140
    Abstract: A magnetic resonance imaging configuration, apparatus and method to straighten and otherwise homogenize the field lines in the imaging portion, creating improved image quality. Through use of calibrated corrective coils, magnetic field lines can be manipulated to improve uniformity and image quality. Additionally, when the apparatus is composed of non-ferromagnetic materials, field strengths can be increased to overcome limitations of Iron-based systems such as by use of superconductivity. A patient positioning apparatus allows multi-positioning of a patient within the calibrated and more uniform magnetic field lines.
    Type: Grant
    Filed: August 4, 2014
    Date of Patent: January 26, 2016
    Assignee: FONAR Corporation
    Inventors: Raymond V. Damadian, Gordon T. Danby, Hank Hsieh, John W. Jackson, Mark Gelbien, William H. Wahl, Charles A. Green
  • Method of correlating a slice profile
    Patent number: 10679365
    Abstract: A method and system for correlating slice profiles associated with a series of magnetic resonance images taken at a plurality of positions. The method comprises first positioning a patient in a first position in the imaging volume of the magnet. A scout scan is then acquired. Selection is then made of an anatomical landmark in the scout scan, which will be referred to as an anatomical fiducial. A particular slice, typically one of a stack of slices to be acquired in a subsequent scan, is selected and precisely positioned at the location of the anatomical fiducial in the scout scan. Following completion of the scan, the patient may be repositioned, necessitating a new scout scan to set up parameters for a second scan.
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: June 9, 2020
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Robert Viel, Robert Wolf, Michael Boitano
  • Magnetic resonance imaging method and apparatus
    Patent number: 9360540
    Abstract: A magnetic resonance imaging configuration and methodology to straighten and otherwise homogenize the field lines in the imaging portion, creating improved image quality. Through use of calibrated corrective coils, magnetic field lines can be manipulated to improve uniformity and image quality. Additionally, when the apparatus is composed of non-ferromagnetic materials, field strengths can be increased to overcome limitations of Iron-based systems such as by use of superconductivity. A patient positioning apparatus and methodology allows multi-positioning of a patient within the calibrated and more uniform magnetic field lines.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: June 7, 2016
    Assignee: FONAR Corporation
    Inventors: Raymond V. Damadian, Gordon T. Danby, Hank Hsieh, John W. Jackson, Mark Gelbien, William H. Wahl, Charles A. Green
  • Magnetic resonance imaging
    Patent number: 9726741
    Abstract: An apparatus and concomitant method for imaging a subject using MR imaging includes exciting nuclei of the subject within an imaging plane using one or more transmitter circuits tuned to a first transmission frequency, sampling MR signals generated from the nuclei at the same time using one or more receiver circuits each receiver circuit having a bandwidth less than 500 kHz, and generating a MR image based on the sampled MR signals. The speed of MR imaging may be increased by providing multiple pairs of transmitter and receiver circuits to operate simultaneously on an imaging plane and/or by streamlining downstream signal processing using multiple phase detectors tuned to detect frequencies associated with particular phase shifts.
    Type: Grant
    Filed: March 10, 2014
    Date of Patent: August 8, 2017
    Assignee: Fonar Corporation
    Inventor: Raymond V. Damadian
  • METHOD AND SYSTEM FOR PERFORMING UPRIGHT MAGNETIC RESONANCE IMAGING OF VARIOUS ANATOMICAL AND PHYSIOLOGICAL CONDITIONS
    Publication number: 20110009731
    Abstract: Vasculature or parenchyma is imaged using upright MRI techniques, on patients who may have conditions such as congestive heart failure, or otherwise be healthy. When an individual is horizontal, venous drainage is minimized, causing the vessels to remain engorged, also referred to herein as vascular congestion. Vascular congestion results in an enlarging of the vessels and surrounding tissue causing the vessels to be more visible on MRIs. The decrease in vascular visibility in upright subjects is in part, due to an increase in venous drainage. Patients suffering from coronary and/or pulmonary deficiencies (e.g. CHF) experience decreased rates and degrees of venous drainage. In one embodiment, the present invention uses upright imaging to visualize these enlarged vessels.
    Type: Application
    Filed: July 8, 2010
    Publication date: January 13, 2011
    Applicant: Fonar Corporation
    Inventors: Raymond V. Damadian, Ki-Cheung Chu
  • Image directed cerebrospinal fluid (CSF) flow determination method and system
    Patent number: 10799141
    Abstract: In one aspect, the present disclosure describes a method for detecting cerebrospinal fluid (CSF) flow of a subject in which magnetic resonance imaging signals of a selected region of interest of the subject's anatomy are acquired. Preferably, the selected region of interest comprises the cerebro-spinal anatomy. A central location of the selected region of interest of the subject's anatomy is determined and used to determine a mean intensity value associated with image pixels of the central location. The mean intensity value is then used to establish interior and exterior outlines of the the selected region of interest of the subject's anatomy so that the CSF flow within the interior and exterior anatomical outlines may be measured or detected.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: October 13, 2020
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Robert Wolf
  • Cervical vertebra angle measurement
    Patent number: 11141080
    Abstract: This disclosure provides a method of measuring the axial rotation of a selected vertebra of a patient using a magnetic resonance (MR) image. The method includes: identifying, in the MR image, two or more features of the selected vertebra; determining a first axis connecting the identified features; identifying, in the MR image, two or more features of the patient's surrounding anatomy that are not features of the selected vertebra; determining a second axis connecting the identified features of the patient's surrounding anatomy; measuring the angular difference between the first and second axes; and determining the axial rotation of the cervical vertebra based on the measurement. In some examples of the disclosure, determining the axial rotation of the cervical vertebra is based on the degree of perpendicularity between the first and second axes.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: October 12, 2021
    Assignee: Fonar Corporation
    Inventors: Raymond V. Damadian, Robert Wolf
  • MAGNETIC RESONANCE IMAGING
    Publication number: 20160051187
    Abstract: An open MRI methodology and system that allows dynamic viewing and access to a patient. In intraoperative MRI, the MRI apparatus is configured in the shape of a typical operating room, with full 360° access to the patient. The MRI apparatus encompasses the entire operating room with magnets located on or near the ceiling and floor of the operating room. The remainder of the MRI apparatus, including the control computer, and imaging monitor, may be located outside of the MRI operating room, in order to keep the operating room free of unnecessary equipment, or located inside of the MRI operating room, as desired for operability of the MRI. The patient is placed over the magnet in the floor, the only fixed location in the operating room. The operating room may contain typical operating equipment, as needed, such as cardiopulmonary bypass units, surgical navigation systems, endoscopy systems, and anesthesia carts.
    Type: Application
    Filed: November 9, 2006
    Publication date: February 25, 2016
    Applicant: FONAR CORPORATION
    Inventor: Raymond V. Damadian
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