Bo Anchored Spatial Excitation (BASE) for Effective Fat Suppression Under Bo Inhomogeneity: Implication for Parallel Transmission

¹Brain Imaging and Analysis Center, Duke University, Durham, NC, USA; ²Radiology, Duke University, Durham, NC, USA

In this report we aim to achieve a uniform and targeted spatial excitation under Bo inhomogeneity. Specifically, we use fat suppression as an example to demonstrate a new strategy termed Bo anchored spatial excitation (BASE), where the transmit frequencies of individual channels are matched to those of the local regions under an inhomogeneous magnetic field. We show that this approach can effectively overcome the field inhomogeneities, and greatly reduce the off-resonance effects during excitation. It is hoped that this new BASE technique can find wide applications in imaging and spectroscopy in vivo in the presence of large field inhomogeneities.