Patent ID: 6747451
Filing Date: 2004-06-08
Classification: A61B,G01R

Abstract:
A method for avoiding over-convolutions in a phase coding direction in magnetic resonance tomography, comprising the steps of:(a) obtaining magnetic resonance data for an overview presentation selected from the group consisting of data for three orthogonal slices of a subject and data for a three-dimensional volume of a subject; (b) from said overview presentation, determining slices for a subsequent magnetic resonance measurement sequence which includes phase coding produced by changing a phase coding gradient in phase coding steps each having a step width, said sequence having a field of view associated therewith; (c) from the selected slices of said measurement sequence, calculating, in a computer, overlapping phases and a magnitude of a signal produced by said overlapping phases; (d) emitting a warning indicating over-convolution if said signal exceeds a reference value; (e) together with said warning, offering a selection to a user for reducing said phase coding step width to enlarge said field of view; and (f) automatically reducing said phase coding step width if said selection is selected.