Anna Masako Welz1, Frederik Testud1, Jrgen Hennig1, Jan G. Korvink2, 3, Maxim Zaitsev1
1Department of Radiology, Medical Physics, University Medical Center Freiburg, Freiburg, Germany; 2Dept. of Microsystems Engineering, IMTEK, University Freiburg, Freiburg, Germany; 3Freiburg Institute of Advanced Studies (FRIAS), University Freiburg, Freiburg, Germany
FFor spatial encoding in magnetic resonance imaging only the Bz component of the magnetic vector is of interest. For linear gradients concomitant fields are well known and investigated. With new imaging techniques, such as PatLoc, using higher order harmonics the concomitant fields of these gradients are in focus. Concomitant fields calculated from the spherical harmonics potential are compared and evaluated against a simplified model since the effect of the concomitant fields on image distortion and PNS is important especially for human imaging.