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Abstract #0208

Spin And Field Echo (SAFE) dynamic field correction in 3T fetal EPI

Lucilio Cordero-Grande1, Anthony Price1, Giulio Ferrazzi2, Jana Hutter1, Daan Christiaens1, Emer Hughes1, and Jo Hajnal1

1King's College London, London, United Kingdom, 2Physikalisch-Technische Bundesanstalt, Braunschweigh and Berlin, Germany

A method for echo planar imaging dynamic B0 field correction based on phase unwrapping is presented. For gradient-echo functional studies, the phase of the natively acquired images is used to estimate the accumulated B0-induced dephasing. For spin-echo diffusion, a matched echo planar imaging field echo navigator is acquired after the spin-echo readout so that motion-induced phase components can be subtracted before unwrapping. Application to both functional and diffusion in-vivo 3T fetal brain imaging is illustrated.

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