Patent ID: 6819108
Filing Date: 2004-11-16
Classification: G01R

Abstract:
A method of shimming a magnet for an MR imaging system, the method comprising the steps of:creating a B0 field about an imaging volume using a magnet assembly designed to generate a B0 field at a pre-defined field strength; determining a minimum acceptable field inhomogeneity for the B0 field; determining at least one of a field strength variation from the pre-defined B0 field strength and an inhomogeneity variation from the minimum acceptable field inhomogeneity at a number of target point along the B0 field; and shimming at at least a portion of the number of target points such that an actual field inhomogeneity does not exceed the minimum acceptable field inhomogeneity and the actual B0 field strength at least substantially approximates the pre-defined field strength after shimming.