BACKGROUND A compact theory that predicts quantitatively when and where magnetic neurostimulation will occur is needed as a guide to therapy, ideally providing a single equation that defines the target volume of tissue excited by single or dual coils. METHODS A first-principles analysis of magnetic stimulation incorporating a simplified description of electromagnetic fields and a simplified c...

A surface coil is any radiofrequency (RF) coil placed directly on the surface of the subject. Surface coils represent some of the simplest coil designs used in magnetic resonance, but are commonly used in experiments requiring the highest possible sensitivity. In contrast to volume coils, which are designed to provide homogeneous sensitivity over the whole field-of-view, surface coils sacrifice...

H. Sanchez Lopez, F. Liu, A. Trakic, S. Crozier School of Information Technology and Electrical Engineering, University of Queensland, Brisbane, Queensland, Australia Introduction: This study details the design trade-offs available for asymmetric gradients and particularly investigates both scaling laws and appropriate relaxation factors useful in the design process. Recently a linear function ...