Efficient Hyperpolarised 13C Metabolic Imaging with Rosette Spectroscopic Imaging

Introduction Metabolic imaging with hyperpolarised C1-pyruvate [1] requires efficient spectral-spatial sampling schemes in order to acquire as much information from the precious non-recoverable polarisation as possible. One approach is to excite the magnetisation with a small-tip angle and apply efficient readout trajectories during the FID, like for instance EPSI (echo-planar spectroscopic imaging) [2] or spiral CSI [3]. A particularly efficient readout trajectory is rosette [4]. In this work, we show initial in vivo results for the application of rosette to metabolic imaging with hyperpolarised C1-pyruvate.