Local Shape Adaptation for Curved Slice Selection

Hans Weber¹, Martin Haas¹, Denis Kokorin¹, ², Jrgen Hennig¹, Maxim Zaitsev¹

ExLoc allows excitation and geometrically matched spatial encoding of customized curved slices, based on a combination of linear and nonlinear gradients. The combination of ExLoc with multidimensional RF-pulses allows compensating for varying slice thickness originating from the nonlinearity of the applied slice-selection field. In this study, we exploit this technique for additional local adaptation of the slice shape. Compared to conventional multi-dimensional excitation with linear encoding fields to excite a curved slice, using this approach allows considerably shorter RF-pulses to be used.