Contemporary safety assessment for parallel transmit (pTx) MRI relies on computationally expensive electromagnetic (EM) simulations; hence, safety evaluations rely on the use of small numbers of models. The effect of patient movement inside the coil on patient safety is, therefore, difficult to capture. In this work we compare 'within-scan' variability with the alternative scenario in which a subject’s head is positioned arbitrarily within the coil, but that this position is different to the one used for the SAR estimation model; we refer to this as ‘pose’ variability.
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