Patent ID: 6583624
Filing Date: 2003-06-24
Classification: G01R

Abstract:
An NMR method for producing an image indicative of synchronous spin motion in a subject including charged particles, the steps comprising:a) applying a polarizing magnetic field to the subject; b) irradiating the subject with an RF excitation field that produces transverse magnetization in spins in said subject; c) applying a magnetic field gradient to the spins which alternates in polarity; d) applying a voltage to the subject which varies in magnitude in synchronism with the alternation in the magnetic field gradient polarity to produce an oscillating electric field in the subject that interacts with charged particles in the subject to produce oscillating motion of the charged particles, where the charged particles produce a stress directly on surrounding material in the subject; e) acquiring an NMR signal produced by the transversely magnetized spins; f) repeating steps a) through e) to acquire a set of said NMR signals from which an image may be reconstructed; and g) reconstructing a phase image from said set of NMR signals.