A highly decoupled transmit-receive array design with triangular elements at 7T.

ABSTRACT:

Purpose

Transmit arrays are essential tools for various RF shimming or parallel excitation techniques at 7T. Here we present an array design with triangular coils to improve diversity in the B₁ profiles in the longitudinal (z) direction and allow for next-nearest neighbor decoupling.

Methods

Two cylindrical 8-channel arrays having the same length and diameter, 1 of triangular coils and the other of rectangular coils, were constructed and compared in phantom imaging experiments using measures of excitation distribution for a variety of RF shim settings and geometry factor maps for different accelerations on different planes.

Results

Coupling between elements was -20 dB or better for all triangular coil pairs, but worse than -12 dB for several of the rectangu

SUBMITTER: Chen G 

PROVIDER: S-EPMC6107369 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature