Anna Masako Welz1, Daniel Gallichan1, Christian Cocosco1, Rajesh Kumar2, Feng Jia2, Jeff Snyder1, Andrew Dewdney3, Jan Korvink2,4, Jrgen Hennig1, Maxim Zaitsev1
1Dept. of Diagnostic Radiology, Medical Physics, University Hospital Freiburg, Freiburg, Baden-Wrttemberg, Germany; 2Dept. of Microsystems Engineering IMTEK, University of Freiburg, Freiburg, Germany; 3Siemens Healthcare, Erlangen, Germany; 44Freiburg Institute of Advanced Studies (FRIAS), University Freiburg, Freiburg, Germany
The proposed and self-build PatLoc gradient coil needs special characterisation to support and improve the quality of the images acquired with this gradient coil. Focusing on image acquisition, frequency shifts arising from eddy currents and concomitant fields were assessed and evaluated. Frequency drifts of around 0.1HZ from eddy currents and up to 300Hz from concomitant fields were observed. With encoding fields of around 3*105 Hz, both effects are negligible for most imaging applications.