Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Reexamination Certificate
2005-03-15
2005-03-15
Shrivastav, Brij B. (Department: 2859)
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
Reexamination Certificate
active
06867590
ABSTRACT:
A method of compensating for eddy currents induced by the switching on and off magnetic fields in gradient coils in NMR imaging apparatuses, which method includes at least one compensation cycle including the steps of performing at least one detection of the magnetic field generated by the current flowing in a gradient coil, i.e., a gradient field; extrapolating the course of the effectively generated gradient field from the data of said at least one detection; generating a gradient fields excitation current compensating the eddy current effects on the gradient fields on the basis of the comparison of the effectively generated gradient fields and of the target gradient field.
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P. Jehenson et al. “Analytical Method for the Compensation of Eddy-Current Effects Induced by Pulsed Magnetic Filed Gradients in NMR System”, Journal of Magnetic Resonances, vol. 90, pp. 264-278, Nov. 1990.
Burns Doane Swecker & Mathis L.L.P.
Esaote S.p.A.
Shrivastav Brij B.
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