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.
