The interaction of electro-magnetic fields with tissues is mediated by Maxwell Equations and inherently related to the existing dielectric and magnetic tissue properties.
In this presentation we will cover some of the aspects known regarding: the physical mechanisms behind of magnetic susceptibility; the conductivity and electric permittivity at the frequencies of interest in MRI (MHz in the case of the resonating radio-frequency waves, and KHz in the case of the switching of encoding gradients).
The way these interactions influence not only the images acquired in MRI but also the comfort of subjects will be addressed.
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