title: Comparative Study of Symmetric and Asymmetric Cylindrical MRI Gradient Y-Coils in terms of Induced Eddy Currents.
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.
authors.affiliation: The School of Information Technology and Electrical Engineering, The University of Queensland, St. Lucia, 4072.
authors.forename: Adnan
authors.initials: A
authors.lastname: Trakic
authors.forename: Feng
authors.initials: F
authors.lastname: Liu
authors.forename: Stuart
authors.initials: S
authors.lastname: Crozier