Abstract #3172
Field perturbations due to hollow spheres with anisotropic magnetic susceptibility
Matthew Cronin 1 , Samuel Wharton 1 , Penny Gowland 1 , and Richard Bowtell 1
1
Sir Peter Mansfield Magnetic Resonance
Centre, The University of Nottingham, Nottingham, Notts,
United Kingdom
The magnetic field perturbations produced when simple
structures composed of materials with isotropic magnetic
susceptibility are exposed to magnetic fields have been
well documented, but the effect of material of
anisotropic magnetic susceptibility has been less
explored. Here, we experimentally investigate the field
perturbations produced by spherical shells of pyrolytic
graphite sheet, a material with a highly anisotropic
susceptibility. It is shown that in agreement with
theory, uniform, geometry-dependent field offsets are
produced inside the spheres with minimal external field
perturbation. The results indicate that hollow spheres
with anisotropic susceptibility could form the basis of
useful tunable contrast agents.
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