Patent ID: 6694166
Filing Date: 2004-02-17
Classification: G01R

Abstract:
Magnetic resonance method for forming a fast dynamic image with an automatically generated grid of essentially orthogonally arranged grid lines by a saturation information induced over the object to be imaged, whereina first set of parallel saturation planes is obtained by applying a first nonselective RF pulse with a flip angle of 90Â°, an intermediate magnetic field gradient pulse in direction of the spatial modulation, a second nonselective RF pulse with a flip angle of 90Â°, a subsequent spoiler gradient pulse in the direction of the magnetic field gradient for slice selection, and a second set of parallel saturation planes is obtained in the same manner by inverting one second RF pulse in one of the orthogonal directions with respect to the first RF pulse, and the first and the saturation planes are subtracted from each other to obtain a grid free of any contribution of relaxation components of magnetization, wherein a tagging grid in three dimensions is provided by obtaining sets of parallel saturation planes in all three spatial directions, whereas the strengths of the spoiler gradient pulses in the three dimensions are different to each other.