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Abstract #4035

A Linear Gradient Solenoid for Slice-Selective Brain Imaging using B1+-Selective RF Pulses

Matthew Wilcox1,2, Sai Abitha Srinivas1,2, Christopher E Vaughn1,2, Charlotte R. Sappo1,2, and William A. Grissom1,2,3,4
1Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, 2Institute of Imaging Science, Vanderbilt University, Nashville, TN, United States, 3Radiology, Vanderbilt University, Nashville, TN, United States, 4Electrical Engineering, Vanderbilt University, Nashville, TN, United States

Despite drawbacks including production of acoustic noise and peripheral nerve simulation, long switching times, bulkiness, and high costs, use of B0 gradient coils is ubiquitous in conventional MR imaging. Replacement of B0 encoding with B1+ encoding alleviates these concerns and allows the use of hardware which is lower-cost, more compact, and silent. As a first step towards realizing a full B1+ encoding coil system, this work demonstrates an RF z-gradient solenoid coil developed for brain imaging on a 47.5 mT system. The coil performance is evaluated in simulation, bench, and scanner experiments and slice-selection using B1+-selective pulses is demonstrated.

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