Abstract #2446
In-vivo brain fast Rosette Spectroscopic Imaging (RSI) with reduced gradient demands/improved patient comfort and a processing pipeline with automated LCModel quantification, for all acquired voxels
Claudiu Schirda 1 , Tiejun Zhao 2 , Ovidiu Andronesi 3 , James Mountz 1 , Fernando Boada 1 , and Hoby Hetherington 1
1
Radiology, University of Pittsburgh School
of Medicine, Pittsburgh, PA, United States,
2
Siemens
Medical Solutions, Pittsburgh, PA, United States,
3
Radiology,
Massachusetts General Hospital, Boston, MA, United
States
The rosette trajectory design flexibility is used to
decrease the demands on scanner gradient system for the
Rosette Spectroscopic Imaging (RSI) sequence. The
reduced gradient readout strength and slew rate results
(in addition to decreased Eddy currents and decreased
frequency drift) in decreased acoustic noise and
decreased scanner vibrations, which improves patient
comfort. A 2D RSI acquisition with in-plane resolution
of 8mm and a 20x20x12 3D RSI acquisition with nominal
isotropic resolution of 8mm and effective voxel size of
0.55cc are demonstrated in-vivo with slew rate of
45mT/m/ms and gradient of 5.8mT/m in 32 sec and 5-10
mins, respectively.
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