Abstract #1062

Dynamically Switched B0 Field Control for Separate Optimization of Tailored Volume Lipid Suppression and B0 Homogeneity for Brain Chemical Shift Imaging at 3T using Multi-Coil Shim Array

Nicolas Arango¹, Jason P. Stockman^2,3, Bernhard Strasser², Borjan Gagoski^3,4, Ovidiu Andronesi², Lawrence L. Wald^2,3, Jacob White¹, and Elfar Adalsteinsson^1,5

¹Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, United States, ²A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospita, Charlestown, MA, United States, ³Department of Radiology, Harvard Medical School, Boston, MA, United States, ⁴Fetal Neonatal Neuroimaging and Developmental Science Center, Boston Children's Hospital, Boston, MA, United States, ⁵Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, MA, United States

A rapidly reconfigurable 32-channel local-multi-coil-shim-array is used to both enhance lipid suppression and narrow metabolite linewidth in chemical-shift imaging of the brain. Using in-situ optimization, the array is first configured to widen the spectral gap between spatially separate lipid and metabolite regions, to improve lipid-surpressing inversion, and then reconfigured for field homogeneity, to narrow metabolite linewidth during readout. For 2cm thick brain slab, using the dynamically-reconfigured array reduced lipid contamination by 24.5%, reduced linewidth by 34%, and increased well-imaged brain area by 38% over static 2^ndorder shimming

How to access this content:

For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.

After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.

After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.

Click here for more information on becoming a member.