A 7T Halo Loop Resonator for Registration of 31P MRSI

Thomas Michael Barbara¹, Manoj Sammi¹, John Grinstead², William D. Rooney¹

An axially oriented loop resonator is used to obtain ¹H co-registration images for ³¹P spectroscopic imaging at 7T using a 12 leg ³¹P birdcage coil. The 8 cm diameter loop provides extended coverage from crown to brain stem with low coupling to the ³¹P volume coil. This approach provides a useful alternative to the careful subject positioning required with two coils or the construction of a double tuned resonator.