Abstract #1426

A 30-element transmit array for 7 Tesla brain imaging with array compressed parallel transmission

Charlotte Sappo^1,2, Gary R Drake^1,3, Xinqiang Yan^1,3, and William A Grissom^1,2,3,4

¹Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, ²Biomedical Engineering, Vanderbilt University, Nashville, TN, United States, ³Radiology, Vanderbilt University, Nashville, TN, United States, ⁴Electrical and Computer Engineering, Vanderbilt University, Nashville, TN, United States

A dense array is desirable for ultra-high field in parallel transmission to better mitigate B₁⁺ field inhomogeneities and control specific absorption rate. Most ultra-high field scanners are limited by the existing number of transmit channels. This limitation can be overcome using array-compressed parallel transmission (acpTx) which enables a small number of channels to drive a large number of coils. This work describes the construction of a 30-loop head transmit array using a mixed overlapped and self-decoupled design with a widely-used commercial 32-channel receive insert for human imaging applications.

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