Abstract #2351

Rosette Spectroscopic Imaging (RSI) of human brain at 7T

Claudiu Schirda¹, Tiejun Zhao², Hoby Hetherington¹, Victor Yushmanov¹, and Jullie Pan¹

¹Radiology, University of Pittsburgh School of Medicine, Pittsburgh, PA, United States, ²Siemens Medical Solutions, Pittsburgh, PA, United States

Rosette Spectroscopic Imaging (RSI) has been shown to provide similar or superior encoding speed and sensitivity to echo-planar (EPSI) and spiral spectroscopic imaging (SSI), while using much lower peak gradient and slew rates. Fully encoded k-t space 3D acquisitions with 0.4ml voxel size in 7.2mins (20x20x12, spectral width SW=1923Hz --6.47ppm, Gmax=7.1mT/m and Smax=86mT/m/ms), and 2D acquisitions as short as 36s (1cc) to a 9.5min dual-echo TE=17/34ms J-refocused with 0.16ml voxel (4mm in-plane, 48x48, SW=2778Hz --9.35ppm, Gmax=5.1mT/m and Smax=18mT/m/ms) were collected at 7Tesla in phantoms, controls and patients with epilepsy and tumors.

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