Radiofrequency (RF) field inhomogeneities affect image quality while performing body and cardiac imaging especially at high field strengths. RF shimming and quantitative MR applications such as T1 mapping can potentially benefit from an accurate knowledge of variations of the transmitted RF field (B1+).
The purpose of this work is to investigate spatial homogeneity of the B1+ in the myocardium at 3.0T. For this study, we developed a prospective ECG-gated method based on DREAM (Dual Refocusing Echo Acquisition Mode).
The presented approach allows free breathing multi-shot acquisition B1+ mapping and its feasibility is shown in vivo.