Bloch-Siegert Shift B1 Mapping with Multi-Band Excitation

Tiejun Zhao¹, Yujuan Zhao², Anthony DeFranco², Tamer S. Ibrahim²

Multi-band (MB) excitation for data acquisition was successfully incorporated into the Bloch-Siegert Shift B1 mapping sequence. The B1 maps from the MB excitation were validated against the conventional Bloch-Siegert data acquisition and were found to be highly comparable with conventional Bloch-Siegert method. The SAR reduction with a factor of two and the slice coverage increased by three folds were demonstrated with the MB methods.