Comparative Study of Symmetric and Asymmetric Cylindrical MRI Gradient Y-Coils in terms of Induced Eddy Currents

Adnan Trakic; Feng Liu; Stuart Crozier

doi:10.1109/IEMBS.2005.1616121

Comparative Study of Symmetric and Asymmetric Cylindrical MRI Gradient Y-Coils in terms of Induced Eddy Currents

Conf Proc IEEE Eng Med Biol Soc. 2005:2005:7016-9. doi: 10.1109/IEMBS.2005.1616121.

Authors

Adnan Trakic¹, Feng Liu, Stuart Crozier

Affiliation

¹ The School of Information Technology and Electrical Engineering, The University of Queensland, St. Lucia, 4072.

PMID: 17281890
DOI: 10.1109/IEMBS.2005.1616121

Abstract

We have recently introduced the concept of whole-body asymmetric MRI systems [1]. In this theoretical study, we investigate the PNS characteristics of whole-body asymmetric gradient systems as compared to conventional symmetric systems. Recent experimental evidence [2] supports the hypothesis of transverse gradients being the largest contributor of PNS due to induced electric currents. Asymmetric head gradient coils have demonstrated benefits in the past [3]. The numerical results are based on an anatomically-accurate 2mm-human voxel-phantom NORMAN [4]. The results of this study can facilitate the optimization of whole-body asymmetric gradients in terms of patient comfort/safety (less PNS), while prospering the use of asymmetric MRI systems for in-vivo medical interventions.