Patent ID: 6057685
Filing Date: 2000-05-02
Classification: G01R

Abstract:
A method for providing an MR image of a section taken through an object, wherein said section is acquired in the presence of translational motion of the said object, and said method comprises the steps of:operating an MR system proximate to said object to acquire a set of imaging data points with respect to said section and with respect to a phase-encoding axis, said imaging data points being acquired at sample points in k-space and being contaminated by phase errors resulting from said motion;operating said MR system to acquire a plurality of correction data point sets, each data point of a correction data point set being acquired along an alignment trajectory and at a location coinciding with the location of one of said imaging data points, each of said alignment trajectories comprising an alignment line oriented in parallel relationship with said phase-encoding axis, the imaging data points respectively coinciding with the correction data points comprising, collectively, a subset of said imaging data points;determining the phase difference between each correction data point set and its corresponding subset of imaging data points, each of said phase differences resulting from said phase errors; andemploying at least some of said phase differences to remove said phase errors from said set of imaging data points.