Adaptive integrated parallel reception, excitation, and shimming (iPRES-A) with microelectromechanical systems switches.

ABSTRACT:

Purpose

Integrated parallel reception, excitation, and shimming coil arrays with N shim loops per radio-frequency (RF) coil element (iPRES(N)) allow an RF current and N direct currents (DC) to flow in each coil element, enabling simultaneous reception/excitation and shimming of highly localized B₀ inhomogeneities. The purpose of this work was to reduce the cost and complexity of this design by reducing the number of DC power supplies required by a factor N, while maintaining a high RF and shimming performance.

Methods

In the proposed design, termed adaptive iPRES(N) (iPRES(N)-A), each coil element only requires one DC power supply, but uses microelectromechanical systems switches to adaptively distribute the DC current into the appropriate shim loops to generate t

SUBMITTER: Darnell D 

PROVIDER: S-EPMC5876104 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature