3963904 MPRAGE magnetization-prepared rapid gradient-echo 203 3963905 MPRAGE magnetization-prepared rapid acquisition gradient echo 145 3963903 MPRAGE magnetization-prepared rapid acquisition of GE 4 3963902 MPRAGE magnetization prepared imaging 1 3963907 MPRAGE mean scores when compared with GRAPPA 1 3963906 MPRAGE multiple gradient echoes 1