Loading patent…
AssigneePicker International, Inc.
InventorsMichael A. Morich, Labros S. Petropoulos, Hiroyuki Fujita, Shmaryu Shvartsman, Robert W. Brown
Estimating the term…
A localized coil (30) is disposed in the temporally constant magnetic field of a magnetic resonance imaging system. The localized coil is designed in five steps: a static problem formulation step, a static current solution step, a discretization step, a current loop connection step, and a high frequency solution step. One radio frequency coil designed by this process to be carried on a circularly cylindrical former includes two coil sections (60, 62) disposed on opposite sides of the dielectric former. Each of the two coil sections includes a pair of inner loops (64.sub.1, 64.sub.2) disposed symmetrically relative to a z=0 plane of symmetry and a second pair of loops (68.sub.1, 68.sub.2) also disposed symmetrically about the plane of symmetry. To raise self-resonance frequency, the inner and outer loops are connected in parallel. The resonance frequency is fine-tuned with reactive elements (66.sub.1, 66.sub.2). To ensure balanced current flow between the two coil portions, the two portions are connected (78) in parallel.
A method of magnetic resonance imaging in which a temporally constant magnetic field is generated through a cylindrical bore of a magnetic resonance imaging system, a localized coil which carries at least a radio frequency coil designed to receive magnetic resonance signals from a region contiguous thereto, a patient and the localized coil are inserted into the bore, magnetic resonance is excited within a portion of the patient contiguous to the localized coil and encoded with magnetic field gradients, the encoded magnetic resonance is received with the localized coil, demodulated, and reconstructed into an image representation, the method further comprising designing the radio frequency coil including:
The method as set forth in claim I wherein the loop connection step includes:
A magnetic resonance imaging device which includes a main field magnet which generates a temporally constant magnetic field through an examination region, gradient magnetic fields coils which generate gradient magnetic field pulses for encoding magnetic resonance signals, a radio frequency coil for receiving the encoded magnetic resonance signals, a receiver which demodulates the received encoded magnetic resonance signals, and a reconstruction processor which reconstructs the demodulated magnetic resonance signals into an image representation, the radio frequency coil including:
A magnetic resonance imaging system in which a main field magnet generates a temporally constant magnetic field through an examination region, gradient magnetic field coils generate magnetic field gradients for encoding magnetic resonance signals, a radio frequency coil at least receives the encoded magnetic resonance signals, a receiver demodulates received encoded magnetic resonance signals, and a reconstruction processor reconstructs the demodulated magnetic resonance signals into an image representation, the radio frequency coil including:
A magnetic resonance imaging system including a main field magnet which generates a temporally constant magnetic field through an examination region, a radio frequency coil, a gradient magnetic field coil, a receiver which demodulates magnetic resonance signals received by the radio frequency coil, and a reconstruction processor which reconstructs the demodulated magnetic resonance signals into an image representation, the radio frequency coil including:
A magnetic resonance imaging system including a main field magnet which generates a temporally constant magnetic field through an examination region, a radio frequency coil, a gradient magnetic field coil, a receiver which demodulates magnetic resonance signals received by the radio frequency coil, .and a reconstruction processor which reconstructs the demodulated magnetic resonance signals into an image representation, the radio frequency coil including:
A magnetic resonance imaging device in which a main field magnet generates a temporally constant magnetic field through an examination region, gradient magnetic field coils encode magnetic resonance signals, a radio frequency coil at least receives the encoded magnetic resonance signals, a receiver demodulates the received encoded magnetic resonance signals, a reconstruction processor reconstructs the demodulated magnetic resonance signals into an image representation, the radio frequency coil including:
Dependencies are inferred from the claim text.