METHOD AND APPARATUS FOR ACQUIRING HIGH RESOLUTION SPECTRAL DATA OR HIGH DEFINITION IMAGES IN INHOMOGENEOUS ENVIRONMENTS

摘要

A method and apparatus for treating a sample for acquiring high-definition magnetic resonance images, (MRI images) or high resolution nuclear magnetic resonance (NMR) spectra even in the presence of magnetic field distortions within one or multiple scans The spatial nature and temporal dependence of the field inhomogeneities are determined a pnori using any of several literature procedures A static or oscillating magnetic field gradient is applie d on the sample so as to endow spins at different positions within the sample with different resonance frequencies A phase- and amplitude-modulated radiofrequency (RF) pulse is applied in unison with the magnetic field gradient so as to endow spins a t different positions within the sample with a homogeneous excitation/inversion profile