31P MR spectroscopic imaging (31P MRSI) in vivo suffers from low spatial resolution and long measurement times. The purpose of this study was to prove feasibility of a three-dimensional 31P radial Echo-Planar Spectroscopic Imaging sequence (3D radial EPSI) for 31P MRSI in vivo at 7T. The presented data with an isotropic spatial resolution of (10mm)3 in the human calf muscle and (18mm)3 in the human brain show well-resolved loaclized spectra proving feasibility of the 3D 31P radial EPSI sequence with measurement times of about 35min at 7T.
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