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4982159 Image distortion correcting method applied to an NMR imaging apparatus
New Patents
VIII
4981136
4982088
NUCLEAR MAGNETIC RESONANCE APPARATUS FOR EVALUATING MUSCLE EFFICIENCY AND MAXIMUM POWER OF MUSCLE OF A LIVING ANIMAL
METHOD AND APPARATUS FOR HIGHLY SENSITIVE SPECTROSCOPY OF TRAPPED IONS
Britto Chance tions Inc
assigned
to Performance
Daniel Weitekamp, California Institute
Pedro J Pizarro of Technology
assigned
to
Predic-
The muscle efficiency of a living animal is evaluated with apparatus comprising a nuclear magnetic resonance (NMR) analytical device that comprises a hollow electromagnet having a bore of sufficient size to receive the animal. A treadmill within the bore and beneath the animal is utilized to produce locomotion of the animal at different rates of work. The NMR analytical device is used to measure at different rates of work the following ratio within a locomotionproducing muscle mass of the animal: See Patent for Mathematical Equation where Pi is the concentration within the muscle mass of inorganic phosphate and PCr is the concentration within the muscle mass of phosphocreatine. Means is provided for relating the measured See Patent for Mathematical Equation values to the rates of work then being performed by the animal to provide an efficiency profile for the muscle mass.
An apparatus and method are disclosed for detection of spectra of internal transitions via ion cyclotron resonance techniques. Details of ion containment in a Penning trap and coupling of spin to spatial motions by the addition of a magnetic bottle field are described in both calssical and quantum mechanical formalisms. The invention alters the axial motion of a single ion with a train of spin flips and monitors magnetic resonance through changes in the cyclotron frequency. Detection of such a signal for a single ion (or a small cloud) provides a sensitivity increase of ten to twenty orders of magnitude over conventional magnetic resonance techniques.
4982159 IMAGE DISTORTION CORRECTING METHOD APPLIED TO AN NMR IMAGING APPARATUS
4981137 MAGNETIC RESONANCE IMAGING APPARATUS Syouzi Kondo, Michihik assigned to Hitachi Ltd
Aoki,
Katsuta,
Japan
A magnetic resonance imaging apparatus for taking a pateint into a air-core of a static magnetic field coil which forms a static magnetic field and a gradient coil which forms a gradient magnetic field and imaging a tomogram of the patient comprising, a microphone disposed in a domain which is on the extension of an air-core and out of the end of the static magnetic field coil, wherein a directivity axis of the microphone is directed to the patient, an amplifier for amplifying an output signal of the microphone, and a first loudspeaker which is connected to the amplifier. Operator clearly hear the patient’s voice in spite of the noise of the striking sound generated from the gradient coil.
Kazuya Hoshino, Tokyo, Japan assigned Yokogawa Medical Systems Limited
to
A method for correcting distortion of a reconstructed image caused by non-uniformity of a static magnetic field in an NMR imaging apparatus, wherein the non-uniformity of a threedimensional static magnetic field is measured, and the measurement data is stored in the form of a matrix having a size smaller than the size of a matrix used in image reconstruction; then, data on a two-dimensional plane, corresponding to a slice plane of the reconstruction image, is taken out from the matrix, and based on that data, a distortion correcting table is produced and is enlarged to agree with the size of the matrix used in image reconstruction, so that distortion of the reconstructed image is corrected using the enlarged distortion correcting table.
VIII
4981136
4982088
NUCLEAR MAGNETIC RESONANCE APPARATUS FOR EVALUATING MUSCLE EFFICIENCY AND MAXIMUM POWER OF MUSCLE OF A LIVING ANIMAL
METHOD AND APPARATUS FOR HIGHLY SENSITIVE SPECTROSCOPY OF TRAPPED IONS
Britto Chance tions Inc
assigned
to Performance
Daniel Weitekamp, California Institute
Pedro J Pizarro of Technology
assigned
to
Predic-
The muscle efficiency of a living animal is evaluated with apparatus comprising a nuclear magnetic resonance (NMR) analytical device that comprises a hollow electromagnet having a bore of sufficient size to receive the animal. A treadmill within the bore and beneath the animal is utilized to produce locomotion of the animal at different rates of work. The NMR analytical device is used to measure at different rates of work the following ratio within a locomotionproducing muscle mass of the animal: See Patent for Mathematical Equation where Pi is the concentration within the muscle mass of inorganic phosphate and PCr is the concentration within the muscle mass of phosphocreatine. Means is provided for relating the measured See Patent for Mathematical Equation values to the rates of work then being performed by the animal to provide an efficiency profile for the muscle mass.
An apparatus and method are disclosed for detection of spectra of internal transitions via ion cyclotron resonance techniques. Details of ion containment in a Penning trap and coupling of spin to spatial motions by the addition of a magnetic bottle field are described in both calssical and quantum mechanical formalisms. The invention alters the axial motion of a single ion with a train of spin flips and monitors magnetic resonance through changes in the cyclotron frequency. Detection of such a signal for a single ion (or a small cloud) provides a sensitivity increase of ten to twenty orders of magnitude over conventional magnetic resonance techniques.
4982159 IMAGE DISTORTION CORRECTING METHOD APPLIED TO AN NMR IMAGING APPARATUS
4981137 MAGNETIC RESONANCE IMAGING APPARATUS Syouzi Kondo, Michihik assigned to Hitachi Ltd
Aoki,
Katsuta,
Japan
A magnetic resonance imaging apparatus for taking a pateint into a air-core of a static magnetic field coil which forms a static magnetic field and a gradient coil which forms a gradient magnetic field and imaging a tomogram of the patient comprising, a microphone disposed in a domain which is on the extension of an air-core and out of the end of the static magnetic field coil, wherein a directivity axis of the microphone is directed to the patient, an amplifier for amplifying an output signal of the microphone, and a first loudspeaker which is connected to the amplifier. Operator clearly hear the patient’s voice in spite of the noise of the striking sound generated from the gradient coil.
Kazuya Hoshino, Tokyo, Japan assigned Yokogawa Medical Systems Limited
to
A method for correcting distortion of a reconstructed image caused by non-uniformity of a static magnetic field in an NMR imaging apparatus, wherein the non-uniformity of a threedimensional static magnetic field is measured, and the measurement data is stored in the form of a matrix having a size smaller than the size of a matrix used in image reconstruction; then, data on a two-dimensional plane, corresponding to a slice plane of the reconstruction image, is taken out from the matrix, and based on that data, a distortion correcting table is produced and is enlarged to agree with the size of the matrix used in image reconstruction, so that distortion of the reconstructed image is corrected using the enlarged distortion correcting table.