TY - JOUR T1 - Monitoring and correcting spatio-temporal variations of the MR scanner's static magnetic field A1 - El-Sharkawy, A-M.M. A1 - Schar, M. A1 - Bottomley, P. A1 - Atalar, E. JA - Magnetic Resonance Materials in Physics,Biology and Medicine Y1 - 2006 VL - 19 SP - 223 EP - 236 N1 - upd vol/pg 15-01-07 ER -