Abstract #4035

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

Matthew Wilcox^1,2, Sai Abitha Srinivas^1,2, Christopher E Vaughn^1,2, Charlotte R. Sappo^1,2, and William A. Grissom^1,2,3,4

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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