Direct Design of 2D Pulses Using Matrix Inversion

Rolf F. Schulte¹, Florian Wiesinger¹

Multi-dimensional RF pulses are used in special applications like targeted excitation or spectrally-spatially selective excitation. Commonly, spectral-spatial pulses are designed in a separable design, by first choosing a suitable gradient trajectory, designing a 1D spectral and a 1D spatial filter function and finally combining this into the actual 2D pulse. In this work, we introduce a simple 2D pulse design by direct matrix inversion, which helps to reduce sideband artefacts. Exemplary spectral-spatial pulses as well as 2D pulses with a quadratic phase are designed which can be used for efficient CSI encoding using SPEN.