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5168233 Antenna joint for surface coils provided with a strain relief flexture joint
XXXVI
New Patents
5168230 DUAL FREQUENCY NMR SURFACE COIL PAIR WITH INTERLEAVEDLOBEAREAS Ralph S Hashoian, General Electric
Kenneth
Belt assigned
to
A dual frequency NMR coil pair is comprised of two individual coils tuned to separate resonant frequencies. Each coil is formed into approximately the same shape by a conductive loop which follows a serpentine path to define an inner area and a plurality of outer lobes. The two individual coils are positioned in close proximity overlying each other, but rotated with respect to each other such that the outer lobes of the two respective coils are interleaved, i.e. not overlaying each other. As a result, mutual loading between the two individual coils is essentially eliminated, permitting dual frequency operation with minimal degradation of Q or signal-tonoise ratio (SNR) in either coil.
NMR IMAGING DEVICE, METHOD FOR CORRECTING INHOMOGENEITY AND METHOD FOR MAKING MAGNETS USED IN THIS DEVICE Grenoble, France assigned to Cende la Recherche Scientifique
Inhomogeneities in a magnetic field are corrected by means of openings of square or polygonal cross-section in the periphery of the magnet. Permanent magnets required for obtaining the desired correction are lodged in the openings. Thus, the orientation of the permanent magnets can only assume a limited number of values, which simplifies the calculation to determine the positions of the magnets used to correct the inhomogeneity of the magnetic field. It is mainly applicable to the correction of inhomogeneity of the magnetic field of a magnet used in nuclear magnetic resonance imaging.
5168232 METHOD FOR RAPID MAGNET SHIMMING Gary Glover, Erik Schneider ral Electric Company
5168233 ANTENNA JOINT FOR SURFACE COILS PROVIDED WITH A STRAIN RELIEF FLEXTURE JOINT Richard E Zibolski Company
5168231
Guy Aubert, tre National
Determination of the shimming fields for a polarizing NMR magnet is performed by acquiring two NMR images with evolution times differing by tau. A pixel by pixel division of the images yields a third image whose phase is proportional to magnetic field inhomogeneity. Several such inhomogeneity images are acquired within a cylindrical volume and the data of the images is fit according to a set of polynomials approximating the fields of the magnet shim coils. The coefficients of this fitting procedure are used to set the current level in the corresponding shim coils. The interaction between correction fields is accommodated by an empirically derived correction matrix. This procedure may be repeated to provide more accurate shimming.
assigned
to Gene-
assigned
to General
Electric
An antenna joint for use in magnetic resonance reception wherein two portions of conductor or foil materials are secured to a splice plate. Electronic components are connected to the conductor materials over the splice plate which provides stress relief for the components. The splice plate can be of various geometric configurations and can have openings to accommodate the components.
5169944 METHODS AND COMPOSITIONS FOR THE ENTERAL ADMINISTRATION OF HEPATOBILIARY MRI CONTRAST AGENTS James A Nelson, Udo P Schmiedl, Linnar L Teng, Jerry C Bommer assigned to Board of Regents of the University of Washington Hepatobiliary magnetic resonance imaging of a human or animal subject is enhanced by enterally administering to the subject an effective amount of a lipophilic contrast enhancing agent. Representative contrast enhancing agents include manganese mesoporphyrin, manganese deuteroporphyrin, manganese pheophorbide
New Patents
5168230 DUAL FREQUENCY NMR SURFACE COIL PAIR WITH INTERLEAVEDLOBEAREAS Ralph S Hashoian, General Electric
Kenneth
Belt assigned
to
A dual frequency NMR coil pair is comprised of two individual coils tuned to separate resonant frequencies. Each coil is formed into approximately the same shape by a conductive loop which follows a serpentine path to define an inner area and a plurality of outer lobes. The two individual coils are positioned in close proximity overlying each other, but rotated with respect to each other such that the outer lobes of the two respective coils are interleaved, i.e. not overlaying each other. As a result, mutual loading between the two individual coils is essentially eliminated, permitting dual frequency operation with minimal degradation of Q or signal-tonoise ratio (SNR) in either coil.
NMR IMAGING DEVICE, METHOD FOR CORRECTING INHOMOGENEITY AND METHOD FOR MAKING MAGNETS USED IN THIS DEVICE Grenoble, France assigned to Cende la Recherche Scientifique
Inhomogeneities in a magnetic field are corrected by means of openings of square or polygonal cross-section in the periphery of the magnet. Permanent magnets required for obtaining the desired correction are lodged in the openings. Thus, the orientation of the permanent magnets can only assume a limited number of values, which simplifies the calculation to determine the positions of the magnets used to correct the inhomogeneity of the magnetic field. It is mainly applicable to the correction of inhomogeneity of the magnetic field of a magnet used in nuclear magnetic resonance imaging.
5168232 METHOD FOR RAPID MAGNET SHIMMING Gary Glover, Erik Schneider ral Electric Company
5168233 ANTENNA JOINT FOR SURFACE COILS PROVIDED WITH A STRAIN RELIEF FLEXTURE JOINT Richard E Zibolski Company
5168231
Guy Aubert, tre National
Determination of the shimming fields for a polarizing NMR magnet is performed by acquiring two NMR images with evolution times differing by tau. A pixel by pixel division of the images yields a third image whose phase is proportional to magnetic field inhomogeneity. Several such inhomogeneity images are acquired within a cylindrical volume and the data of the images is fit according to a set of polynomials approximating the fields of the magnet shim coils. The coefficients of this fitting procedure are used to set the current level in the corresponding shim coils. The interaction between correction fields is accommodated by an empirically derived correction matrix. This procedure may be repeated to provide more accurate shimming.
assigned
to Gene-
assigned
to General
Electric
An antenna joint for use in magnetic resonance reception wherein two portions of conductor or foil materials are secured to a splice plate. Electronic components are connected to the conductor materials over the splice plate which provides stress relief for the components. The splice plate can be of various geometric configurations and can have openings to accommodate the components.
5169944 METHODS AND COMPOSITIONS FOR THE ENTERAL ADMINISTRATION OF HEPATOBILIARY MRI CONTRAST AGENTS James A Nelson, Udo P Schmiedl, Linnar L Teng, Jerry C Bommer assigned to Board of Regents of the University of Washington Hepatobiliary magnetic resonance imaging of a human or animal subject is enhanced by enterally administering to the subject an effective amount of a lipophilic contrast enhancing agent. Representative contrast enhancing agents include manganese mesoporphyrin, manganese deuteroporphyrin, manganese pheophorbide