In Fig. 4c of this Article originally published, the bottom y axis was incorrectly labelled as 'MRI-ECG (μV)'; the correct label is 'MRI/ECG'. In addition, in Fig. 4d, the bottom y axis was incorrectly labelled as 'ECG (μV)'; the correct label is 'ECG (mV)'. The scale bar units were also incorrectly stated as 'mV', the correct units are 'μV'. The figure has now been amended accordingly.