Patent ID: 6380740
Filing Date: 2002-04-30
Classification: G01R

Abstract:
A method for acquiring time-resolved and spatially resolved three-dimensional datasets by magnetic resonance, comprising the steps of:(a) exciting nuclear spins in an examination subject; (b) phase coding said nuclear spins in a first direction with a first phase coding gradient and in a second direction with a second phase coding gradient; (c) reading out said nuclear spins from said subject under a readout gradient in a third direction; (d) repeating steps (a) through (c) with respectively different combinations of phase coding in said first and second directions, to acquire a plurality of three-dimensional datasets occupying three-dimensional k space in respective segments, said segments comprising a central, cylindrical segment and a plurality of annular cylindrical segments successively surrounding said central cylindrical segment, each of said segments having a longitudinal axis in said third direction; and (e) repeating steps (a) through (d) for acquiring a plurality of three-dimensional datasets respectively allocated to a plurality of different time spans, with the different combinations of said phase coding gradients in step (d) having a chronological sequence so that data occupying said central k space segment are acquired more often than data occupying said annular segments.