HYBRID MODELLING OF AXONAL MAGNETIC FIELDS FOR DIRECT MR NEURONAL DETECTION ESTIMATION

μ is the permeability of free space and e the permittivity. Results The resulting B field values were in the range 2-25nT, with the field strongest at the axonal axis and decreasing with distance from the axon. This reduction in field strength with distance from the axon is relevant in MEG where the sensors are relatively far removed from the axon. However, for DND this is less relevant due to the spatial localization of the perturbations in the MR image, and therefore here the average B field within a voxel is a more relevant quantity. The B field components