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Calculation of the electric field resulting from human body rotation in a magnetic field

from Medical Physics Web

The electric field and current density induced in the human body by movement in and around magnetic resonance imaging installations can sometimes exceed regulatory levels. Good theoretical models would help medical physicists plan procedures that stay within safety and regulatory limits. Using simple electromagnetic analysis, a trio of researchers have shown in a paper appearing in Physics in Medicine and Biology that v  ×  B rather than −(v   ∇)A should be used as the driving term in potential-based modeling of induced fields under rotational motion. They also show that it is necessary to take account of the volume charge density that is generated when the magnetic field and axis of rotation are not perpendicular in all locations. more


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