Spectroscopic Imaging using Concentrically Circular Echo-Planar Trajectories

Jon Furuyama¹, Neil Wilson¹, M. Albert Thomas¹

Echo-Planar Spectroscopic Imaging (EPSI) is the acceleration technique of choice for chemical shift imaging, but due to hardware constraints, is limited low spectral bandwidths, which can create severe spectral aliasing. We propose a novel Spectroscopic Imaging using CONcentrically Circular Echo-Planar Trajectories (SI-CONCEPT), which, being gentler on the hardware, is capable of producing spectra with higher bandwidths, making this technique suitable for higher magnetic fields. We demonstrate the feasibility on a healthy human volunteer, showing that the use of concentrically circular k-space trajectories accurately encodes both spatial and spectral information.