Abstract #4089

Combined prospective motion correction and retrospective B0 correction for EPI using optical tracking and predictive B0 maps.

James Smith¹, Olivier Mougin¹, Kingkarn Aphiwatthanasumet¹, Matthew Clemence², Andrew Peters¹, Richard Bowtell¹, Paul Glover¹, and Penny Gowland¹

¹Sir Peter Mansfield Imaging Centre, School of Physics and Astronomy, University of Nottingham, Nottingham, United Kingdom, ²Philips Healthcare, Nottingham, United Kingdom

We demonstrate a combination of prospective motion correction and retrospective B₀ unwarping using predictive field maps to improve the registration of EPI images. Prospective motion correction is performed using an optical tracking camera and custom scanner code. Field maps were generated using a multilinear fit of subject orientation using data gathered at known orientations. Results show a higher correlation when registering EPI data to a high-resolution anatomical, post-correction.

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