Abstract #4076

RF Shim Flexibility with Multi-Surface-Loop Arrays Over Varying Head Geometries

Benjamin M Hardy^1,2, Yurui Gao^2,3, and Adam W Anderson^2,3

¹Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, United States, ²Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, ³Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, United States

Magnetic and electric field values are simulated with up to 480 Radio Frequency surface loops 1 cm in radius surrounding realistic head models. The work investigates the capability of B₁⁺shimming alone with increased degrees of freedom. Transmit efficiency, power limitations, and target homogeneity across the brain volume inform design choices for the array. Evidence of the effects of subject to subject variation can be seen in the optimized shim weights magnitude and phase variation for a choice 256-element geometry optimized over 20 unique head models oriented at 3 head angles.

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.