Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1985-08-16
1987-11-10
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
G01R 3320
Patent
active
047060263
ABSTRACT:
A method for reducing image artifacts due to periodic motion of a subject undergoing examination by nuclear magnetic resoance (NMR) techniques includes the acquisition of scan data for imaging the object. The scan data is composed of a number of views. The acquisition of each view includes the generation of an NMR signal and the application of a magnetic gradient along at least one dimensional axis of the object. The magnetic field gradient is characterized by a parameter value (e.g., amplitude or direction) adjustable from view to view to encode spatial information into the NMR signal. The method includes the step of selecting the value of the adjustable parameter value for each view. A view order is then selected so as to attempt to obtain a predetermined relationship between the object motion and the adjustable parameter of the magnetic field gradient. The relationship is chosen to minimize artifacts in the reconstructed image. The method is applicable to various NMR imaging techniques, including Fourier Transform and multiple angle projection reconstruction.
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Glover Gary H.
Pelc Norbert J.
General Electric Company
Mollon Mark L.
Stoner Douglas E.
Tokar Michael J.
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