Abstract #0443

Temperature-dependent Gradient System Transfer Function (GSTF)

Manuel Stich^1,2, Christiane Pfaff^1,2, Tobias Wech¹, Anne Slawig¹, Gudrun Ruyters³, Andrew Dewdney³, Ralf Ringler², Thorsten A. Bley¹, and Herbert Köstler¹

¹Department of Diagnostic and Interventional Radiology, University Hospital Würzburg, Würzburg, Germany, ²X-Ray & Molecular Imaging Lab, Technical University Amberg-Weiden, Weiden, Germany, ³Siemens Healthcare GmbH, Erlangen, Germany

The gradient system transfer function (GSTF) characterizes the frequency transfer behavior of a dynamic gradient system and can for example be used to correct non-Cartesian k-space trajectories. This work analyzes the impact of the gradient coil temperatures on the GSTF by applying gradients with high amplitudes at extensive duty cycles. The obtained results show that heating changes the transfer characteristics of the system. Based on these findings, we developed a model to predict the self- and B₀-terms of the GSTF in dependency of the temperature.

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