Rapid Method of Mapping Eddy Current Fields

Andrew J. Wheaton¹, Wayne R. Dannels¹

The purpose of this investigation is to develop a rapid method of volumetric field mapping for the purpose of measuring linear and higher-order eddy current-induced gradient fields. The method includes a novel pulse sequence using a grid tag module to sensitize the magnetization to eddy-induced moment accumulation. Any conventional sequence can be used for detection thus enabling fast acquisition. Results are shown on a commercial scanner demonstrating eddy current maps with higher order spherical harmonic terms acquired in less than 20 seconds.