The use of coil sensitivity variations in the read-direction for improved parallel imaging
Breuer F, Blaimer M, Seiberlich N, Griswold M, Jakob P
University of Wrzburg
In conventional Cartesian parallel MRI sensitivity variations provided by the receiver array can only be exploited in the phase encoding direction in which undersampling is performed. Potential sensitivity variations in the read-out direction are unused. In this work we show that sensitivity variations in the read direction can additionally be exploited by employing rapidly oscillating phase encoding gradients during the actual read-out process. This strategy allows one to exploit sensitivity variations in one additional dimension resulting in improved parallel image reconstruction quality for both 2D and 3D imaging.