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Decomposition of the rotation artefact (for right‐handed rotation about the x‐axis with an angular velocity of 0.44°/s in a field of 3 T) into contributions from (a) the electrodes and (b) the digitized leads as used in the numerical model. Note the opposite polarity of the two patterns. [Color figure can be viewed in the online issue, which is available at www.interscience.wiley.com.]
