Is a 2D-Spiral Excitation Trajectory Sufficient for 3D Inner Volume Imaging ?

Alexis Amadon¹, Alexandre Vignaud¹, Aurlien Massire¹, Michel Bottlaender¹, Nicolas Boulant¹

Parallel transmission allows shortening fancy spatially-selective RF pulses. For a parallelepiped volume of interest, we investigate the possibility to use a mere 2D-spiral in excitation k-space to insure 3D selectivity for Inner Volume Imaging or CSI, by making the third dimension be the readout axis of a 3D sequence. We thereby observe to what extent the excitation profile is preserved along the readout direction. Moreover we demonstrate a zooming application on an ex-vivo baboon brain at 7T.