Improved traveling-wave efficiency in 7T human MRI using passive local loop and dipole arrays.

ABSTRACT: Traveling-wave MRI, which uses relatively small and simple RF antennae, has robust matching performance and capability for large field-of-view (FOV) imaging. However, the power efficiency of traveling-wave MRI is much lower than conventional methods, which limits its application. One simple approach to improve the power efficiency is to place passive resonators around the subject being imaged. The feasibility of this approach has been demonstrated in previous works using a single small resonant loop. In this work, we aim to explore how much the improvements can be maintained in human imaging using an array design, and whether electric dipoles can be used as local elements. First, a series of electromagnetic (EM) simulations were performed on a human model. Then RF coils were constructed an

SUBMITTER: Yan X 

PROVIDER: S-EPMC5410385 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature