This invention discloses methods and apparatuses for 3D imaging in
Magnetoencephalography (MEG),
Magnetocardiography (MCG), and electrical activity in any
biological tissue such as neural /
muscle tissue. This invention is based on Field Paradigm founded on the principle that the
field intensity distribution in a 3D volume space uniquely determines the 3D
density distribution of the field emission source and vice versa. Electrical neural /
muscle activity in any
biological tissue results in an
electrical current pattern that produces a
magnetic field. This
magnetic field is measured in a 3D volume space that extends in all directions including substantially along the radial direction from the center of the object being imaged. Further,
magnetic field intensity is measured at each point along three mutually perpendicular directions. This measured data captures all the available information and facilitates a computationally efficient closed-
form solution to the 3D image
reconstruction problem without the use of
heuristic assumptions. This is unlike prior art where measurements are made only on a surface at a nearly constant radial distance from the center of the target object, and along a single direction. Therefore necessary, useful, and available data is ignored and not measured in prior art. Consequently, prior art does not provide a closed-
form solution to the 3D image
reconstruction problem and it uses
heuristic assumptions. The methods and apparatuses of the present invention reconstruct a 3D image of the neural /
muscle electrical current pattern in MEG, MCG, and related areas, by
processing image data in either the original
spatial domain or the
Fourier domain.