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Abstract #5209

The Gradient Switching-induced Current Field in Multi-echo Gradient Recalled Echo Sequences

Haodong Zhong1, Yang Song2, and Jianqi Li1
1East China Normal University, Shanghai, China, 2MR Research Collaboration Team, Siemens Healthineers, Shanghai, China

Synopsis

Keywords: Quantitative Imaging, Electromagnetic Tissue Properties, Total Field Inversion, Boundary Element method, Fast Multipole method

Motivation: Accurate magnetic field calculations are critical for imaging techniques like QSM and EPT. Eddy currents generated by gradient switching may introduce inaccuracies, potentially affecting these measurements.

Goal(s): This study aims to explore the existence and characteristics of eddy currents generated by gradient switching in multi-echo GRE sequences

Approach: A series of multi-echo GRE scans were performed on spherical water phantoms with varying experimental conditions to evaluate their influence on the eddy currents.

Results: A non-harmonic field component generated by eddy currents from gradient switching was observed in the phase maps of spherical phantoms in multi-echo GRE.

Impact: These findings demonstrate the impact of eddy currents generated in multi-echo GRE by gradient switching on phase images, necessitating further investigation into their effects in vivo.

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