Abstract: A motion sensing MRI coil allows correction of motion-induced image artifacts by the MRI machine or on a machine independent basis using correction circuitry associated with the coil.
Abstract: A phase array coil uses asymmetric loops and selective overlapping to provide a more uniform field sensitivity to magnetic flux passing through the surface defined by multiple such phased array loops.
Abstract: A modular lower coil provides for a head, a vascular and, a thoracic/lumbar element that may interfit or be separated to provide individual imaging of these areas or a combined imaging region stretching from the head to the lower spine. A switch box allows individual ones of these elements to be connected to the MRI machine if necessary because of a limitation of inputs to the machine and provides for decoupling currents to minimize interference between the coil elements when one element is being used.
Type:
Grant
Filed:
November 25, 2003
Date of Patent:
March 15, 2005
Assignee:
IGC-Medical Advances, Inc.
Inventors:
Ashok Menon, Derek Seeber, Jovan Jevtic
Abstract: A phased array coil providing spatial discrimination for simultaneous spin acquisition maximizes transverse and longitudinal acceleration through the use of loops having boundaries tipped to the longitudinal axis.
Abstract: A local coil for magnetic resonance imaging equipment employs mirror conductors on opposite sides of an insulating substrate to produce lower resistance, higher Q and improved signal-to-noise ratio for a given foil thickness.
Abstract: A cable routing system for an MRI coil having multiple loops and multiple signal cables provides a non-resonant conductive ring surrounding the loops and grounded to define a low electrical field region along which the signal cables may be routed for reduced interference.
Type:
Grant
Filed:
August 22, 2002
Date of Patent:
August 24, 2004
Assignee:
IGC-Medical Advances, Inc.
Inventors:
Velibor Pikelja, Derek Seeber, Jovan Jevtic, Ashok Menon, William T. Johnson, Jr.
Abstract: A head coil for magnetic resonance imaging may be shortened longitudinally to provide for better access by a patient. Extension of the coil may be performed after the positioning of the patient's head significantly simplifying patient positioning with respect to the coil. A portion of a conductor support sliding over the patient's head removable to allow endotracheal tubes or the like to remain undisturbed.
Type:
Grant
Filed:
November 22, 2002
Date of Patent:
July 13, 2004
Assignee:
IGC-Medical Advances, Inc.
Inventors:
Jovan Jevtic, Ashok Menon, Derek Seeber, Matthew J. Mercier, Steven M. Zwolinski, Matthias Gyori
Abstract: A local coil for magnetic resonance imaging employs a loop divided by a shunting conductor which reduces sensitivity and field strength at one end of the loop to provide improved homogeneity for different coil configurations.
Type:
Grant
Filed:
March 5, 2003
Date of Patent:
April 27, 2004
Assignee:
IGC Medical Advances, Inc.
Inventors:
Jovan Jevtic, Derek Seeber, Ashok Menon
Abstract: A floating shield current trap provides two resonance loops formed of split concentric tubular conductors joined radially at their axial ends. Adjustment of the separation of these loops provides a change in coupling between the loops effecting a simplified tuning of the resonance of the trap for different expected frequencies of interfering shield current.
Abstract: A floating shield current trap provides first and second concentric tubular conductors electrically connected to provide a resonance-induced high impedance of current flow in a path consisting of the inner and outer conductors and their junctions thereby suppressing coupled current flow on a shield of a conductor contained within the first inner tubular conductor.
Type:
Grant
Filed:
May 13, 2002
Date of Patent:
August 12, 2003
Assignee:
IGC-Medical Advances, Inc.
Inventors:
Derek Seeber, Ashok Menon, Jovan Jevtic
Abstract: A flexible peripheral coil for magnetic resonance imaging provides a tapered volume conforming to a patient through the use of multiple flexible leaves of decreasing combined length which enclose progressively smaller cylindrical areas while maintaining correct coil orientation. A freestanding foot coil may be placed over the patient's foot with toes passing through an aperture in the coil to complete the scanning coverage area. Straps allow the various coil leaves to accommodate different body sizes effectively varying the taper of the coil.