Electricity: measuring and testing – Particle precession resonance – Using an electron resonance spectrometer system
Patent
1986-04-15
1988-01-12
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using an electron resonance spectrometer system
128653, 128731, 324309, G01R 3320
Patent
active
047194251
ABSTRACT:
A method and apparatus for imaging the concentration of paramagnetic species inside a sample is disclosed wherein a sample is placed inside an NMR imager and an additional microwave field is introduced. A microwave field is chosen in such a way that there is a simultaneous resonance of nuclear spins (protons) and electrons in the same main magnetic field. The microwave signal is modulated which provides a modulation transfer to the intensity of the NMR signal. The modulation is extracted from the NMR signal to produce an image representative of the local electron spin resonance (ESR) and thereby the concentration of paramagnetic species in the sample. In addition, electrical activity of the brain can be detected and measured by measuring the broadening of the width of NMR spectral lines. A discharging neuron in the brain introduces an inhomogeneity in the magnetic field which reveals itself as a broadening of resonance lines which can be measured to determine the neuron discharge current flux.
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O'Shea Kevin D.
Scientific Innovations, Inc.
Tokar Michael J.
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