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Abstract #4507

Investigation of the Cost Function for Joint Estimation of Object and B0

Franz Patzig1, Bertram Wilm1, and Klaas Pruessmann1

1University of Zurich and ETH Zurich, Zurich, Switzerland

Due to their short read-out time single-shot techniques are frequently used for several imaging modalities but they are prone to static B0 off-resonance artifacts. To avoid separately acquired field maps joint estimation of the object and the B0 map has been proposed as a potential solution alternating between updating an object and a field map guess. A measure to compare cost functions is introduced and two different joint estimation cost functions are investigated whereby a new cost function in image space is suggested. It shows its potential if only a less reliable B0 map guess is given.

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