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5166617 High power NMR probe
xxx111
New Patents
mediated relaxation assay system (SMRAS). SMRAS is based on the observation that the enhancement of proton relaxation rates produced by a magnetic material can be modulated by the binding of various analytes to a magnetic material. Hence the relaxation rate of the solvent can be interpreted to give information on the concentration of an analyte.
51164670 MULTIDIMENSIONAL MAGNETIC RESONANCE SYSTEM USING SELECTIVE DISCRETE FOURIER TRANSFORMATION (SDFT) Sandor Szalma, 1stva Pelczer, Szeged, Hungary assigned to Syracuse University
A radio frequency magnetic field is applied to a sample or object to be examined which is placed in a static magnetic field and oscillates periodically, and nuclear magnetic resonance signals are generated from the sample. The NMR signal is transformed to a signal having a form wherein a still image component and an artifact component resulting from the periodic oscillation, that are contained in the NMR signal, are mutually separated, and then processing is applied to the signal thus transformed so as to remove the artifact component therefrom. Inverse transform to the transform described above is applied to the signal thus processed.
5166615
NY,
Magnetic resonance data is generated as a set of digital signals in the time domain. Each signal represents a multiplicity of parameters (for example two or three dimensions in the frequency Transformation of such multidomain). parameter (multidimensional) time domain signals into the frequency domain to provide multidimensional spectra (in frequency or in space for resonance imaging) utilizes discrete Fourier transformation in a spectral region of interest by calculating matrix products of data points corresponding to successively spaced values of the time domain signal in sequence with data signals corresponding to successive frequency points to obtain the output spectra. To increase the efficiency of the calculations zero padding may be accomplished directly in the frequency domain reconstructing more or less data points there than the corresponding number of the acquired time domain points, to increase or decrease digital resolution. Small information rich regions of the spectra (e.g., 2D and 3D NMR spectra) ma:y be produced, without reconstruction of the other part of the spectra, directly from the time domain data, with no intermediate transposition step, and greatly reduced computatioral resources (e.g., disk input/output (I/O)).
SYSTEM FOR DETECTING NUCLEAR MAGNETIC RESONANCE SIGNALS FROM SMALL SAMPLES John A Sidles assigned to The Board of Regents of the University of Washington Apparatus and methods for detecting NMR signals from small samples using mechanical oscillators. In one embodiment, the sample is affixed to the mechanical oscillator, and immersed in a magnetic field. Magnetic resonance is detected by monitoring the mechanical excitation of the oscillator. The greatest excitation occurs when there is a three-fold resonance between the spin precession frequency of the sample, the natural frequency of the oscillator, and the oscillation frequency of the applied time dependent magnetic field. Samples as small as a single atomic nucleus can generate a detectable signal. In a second embodiment, the sample is affixed to a mechanically vibrating substrate, and a magnetic source is affixed to the mechanical oscillator.
5166617
5:165411 MAGNETIC RESONANCE IMAGING METHOD Yoshiyuk Miyamoto, Ryuzaburo Takeda, Toshiaki Aritomi, K.atsuta, Japan assigned to Hitachi Ltd
HIGH POWER NMR PROBE Xuan
Z Ni assigned
to Varian
Associates
An NMR probe employs an adjustable tage divider (C 1, C2’) comprising a single tive impedance switched into or out divider by a single 2-pole switch (SPl’,
Inc
RF volcapaciof the SP2’).
New Patents
mediated relaxation assay system (SMRAS). SMRAS is based on the observation that the enhancement of proton relaxation rates produced by a magnetic material can be modulated by the binding of various analytes to a magnetic material. Hence the relaxation rate of the solvent can be interpreted to give information on the concentration of an analyte.
51164670 MULTIDIMENSIONAL MAGNETIC RESONANCE SYSTEM USING SELECTIVE DISCRETE FOURIER TRANSFORMATION (SDFT) Sandor Szalma, 1stva Pelczer, Szeged, Hungary assigned to Syracuse University
A radio frequency magnetic field is applied to a sample or object to be examined which is placed in a static magnetic field and oscillates periodically, and nuclear magnetic resonance signals are generated from the sample. The NMR signal is transformed to a signal having a form wherein a still image component and an artifact component resulting from the periodic oscillation, that are contained in the NMR signal, are mutually separated, and then processing is applied to the signal thus transformed so as to remove the artifact component therefrom. Inverse transform to the transform described above is applied to the signal thus processed.
5166615
NY,
Magnetic resonance data is generated as a set of digital signals in the time domain. Each signal represents a multiplicity of parameters (for example two or three dimensions in the frequency Transformation of such multidomain). parameter (multidimensional) time domain signals into the frequency domain to provide multidimensional spectra (in frequency or in space for resonance imaging) utilizes discrete Fourier transformation in a spectral region of interest by calculating matrix products of data points corresponding to successively spaced values of the time domain signal in sequence with data signals corresponding to successive frequency points to obtain the output spectra. To increase the efficiency of the calculations zero padding may be accomplished directly in the frequency domain reconstructing more or less data points there than the corresponding number of the acquired time domain points, to increase or decrease digital resolution. Small information rich regions of the spectra (e.g., 2D and 3D NMR spectra) ma:y be produced, without reconstruction of the other part of the spectra, directly from the time domain data, with no intermediate transposition step, and greatly reduced computatioral resources (e.g., disk input/output (I/O)).
SYSTEM FOR DETECTING NUCLEAR MAGNETIC RESONANCE SIGNALS FROM SMALL SAMPLES John A Sidles assigned to The Board of Regents of the University of Washington Apparatus and methods for detecting NMR signals from small samples using mechanical oscillators. In one embodiment, the sample is affixed to the mechanical oscillator, and immersed in a magnetic field. Magnetic resonance is detected by monitoring the mechanical excitation of the oscillator. The greatest excitation occurs when there is a three-fold resonance between the spin precession frequency of the sample, the natural frequency of the oscillator, and the oscillation frequency of the applied time dependent magnetic field. Samples as small as a single atomic nucleus can generate a detectable signal. In a second embodiment, the sample is affixed to a mechanically vibrating substrate, and a magnetic source is affixed to the mechanical oscillator.
5166617
5:165411 MAGNETIC RESONANCE IMAGING METHOD Yoshiyuk Miyamoto, Ryuzaburo Takeda, Toshiaki Aritomi, K.atsuta, Japan assigned to Hitachi Ltd
HIGH POWER NMR PROBE Xuan
Z Ni assigned
to Varian
Associates
An NMR probe employs an adjustable tage divider (C 1, C2’) comprising a single tive impedance switched into or out divider by a single 2-pole switch (SPl’,
Inc
RF volcapaciof the SP2’).