Abstract #0328

Spectroscopic Imaging Using Wideband Parallel RF Excitation at 7T

Borjan Aleksandar Gagoski¹, Kawin Setsompop², Joonsung Lee¹, Vijay Alagappan², Michael Hamm³, Axel vom Endt³, Lawrennce Wald^4,5, Elfar Adalsteinsson^5,6

¹Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, USA; ²A. A. Martinos Center for Biomedical Imaging, MGH, Charlestown, MA, USA; ³Siemens Medical Solutions, Charlestown, MA, USA; ⁴A. A. Martinos Center for Biomedical Imaging, Department of Radiology, MGH, Charlestown, MA, USA; ⁵Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA, USA; ⁶Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge,, MA, USA

pTx mitigation excitation over a 600Hz spectral bandwidth and a 3 cm thick slab, preceded by pTx Gaussian-shaped pulses for water suppression was used in a chemical shift imaging acquisitions. The goal of this work is to demonstrate that compared to the regular birdcage (BC) mode excitation, the proposed pTx wideband excitation provides spatial uniformity of metabolite signals in a spectroscopy phantom containing physiological brain metabolite concentrations.