Department of Neurology, Vanderbilt University, Nashville, Tennessee 37212, USA. stefan.engstrom@vanderbilt.edu
We describe devices designed for magnetic field exposures in which field amplitude and gradients are controlled simultaneously. Dosimetry based on field continuation of high resolution magnetic field scans and numerical models is compared with validation measurements. The dosimetry variables we consider are based on the assumption that the biological or chemical system under study has field transducers that are spatially isotropic, so that absolute field amplitude and two gradient components fully describe local exposure. Copyright 2005 Wiley-Liss, Inc.