Lorentz Force

The Lorentz force is the physical interaction experienced by charged particles moving through magnetic and electric fields, defined by F = q(E + v × B). In bioimaging, this force is utilized to convert induced currents within conductive tissues into mechanical displacements. When an externally applied time-varying magnetic field generates eddy currents, these currents in the presence of a static magnetic field incur Lorentz forces that cause pressure changes, leading to acoustic wave emission.

This effect underpins MAET's capability to link electromagnetic induction with ultrasound generation, enabling remote, non-contact measurement of tissue conductivity and mechanical properties. By modulating the magnetic excitation and synchronizing acoustic detection, high-resolution mapping of complex biological media becomes feasible, opening avenues for functional and structural imaging in research settings.