Fully Adiabatic 31P 2D CSI with Negligible Chemical Shift Displacement Error at 7T

Marek Chmelik¹, Stephan Gruber¹, Siegfried Trattnig¹, Wolfgang Bogner¹

Fully adiabatic ³¹P 2D CSI sequence with negligible chemical shift displacement error (CSDE) for 7T based on 1D-ISIS/2D-CSI selection was developed. Slice selective excitation was achieved by a spatially selective broadband GOIA inversion pulse prior to non selective adiabatic excitation which was followed by 2D phase encoding gradients. This reduced CSDE ~8 fold in slice direction compared to conventional 2D-CSI with Sinc3 selective pulse at 7T. The sequence allows in combination with AHP or BIR-4 excitation fully adiabatic performance suitable to be used with B₁ inhomogeneous surface coils.