Читать книгу Essentials of MRI Safety - Donald W. McRobbie - Страница 95

A similar effect is the generation of an electric field E by the flow of charge within an external magnetic field (Figure 2.26). This is analogous to the Hall effect observed in semiconductors.

(2.21)

Figure 2.26 Magneto‐hydrodynamic and Hall effect.

In terms of induced voltage or electrical potential, V, where

(2.22)

and d is the distance between charged surfaces (as in a capacitor), we have an induced voltage

(2.23)

The effect is most commonly encountered in MRI as an artefact in ECG traces.