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Abstract #4317

31P Spectroscopic Imaging with GRAPPA

Rahul Srinivasa Raghavan1, Anshuman Panda2, Julien Valette3, Judy R. James2,4, Keith Heberlein5, Uwe Boettcher5, Pierre-Gille Henry6, Navin Bansal7, Ulrike Dydak2,4

1School of Electrical & Computer Engineering, Purdue University, West Lafayette, IN, USA; 2School of Health Sciences, Purdue University, West Lafayette, IN, USA; 3CEA-NeuroSpin, Gif-sur-Yvette, France; 4Department of Radiology, Indiana University School of Medicine, Indianapolis, IN, USA; 5Siemens Healthcare, Erlangen, Germany; 6Center for Magnetic Resonance Research,, University of Minnesota, USA; 7Department of Radiology, Indiana University, USA

Using a novel 8-channel phased-array dual-tuned 31P/1H coil the feasibility of using GRAPPA for accelerating 31P MRSI was tested. Single-slice 31P MRSI with 24x24 phase-encoding steps was acquired on a phantom, artificially undersampled and reconstructed with different GRAPPA acceleration factors. The reconstructed metabolite maps and spectra show acceptable quality and no aliasing artifacts, this showing that 31P MRSI can in principle be combined with parallel imaging. Whether 3D MRSI with large matrix sizes might be a candidate yielding enough SNR in vivo to be acquired with a single average and may benefit from GRAPPA acceleration is currently under investigation.

Exhibit Hall 2-3 Wednesday 13:30-15:30 Computer 77