Comparison of MEMS switches and PIN diodes for switched dual tuned RF coils.

ABSTRACT:

Purpose

To evaluate the performance of micro-electromechanical systems (MEMS) switches against PIN diodes for switching a dual-tuned RF coil between ¹⁹ F and ¹ H resonant frequencies for multi-nuclear lung imaging.

Methods

A four-element fixed-phase and amplitude transmit-receive RF coil was constructed to provide homogeneous excitation across the lungs, and to serve as a test system for various switching methods. The MR imaging and RF performance of the coil when switched between the ¹⁹ F and ¹ H frequencies using MEMS switches, PIN diodes and hardwired configurations were compared.

Results

The performance of the coil with MEMS or PIN diode switching was comparable in terms of RF measurements, transmit efficiency and image

SUBMITTER: Maunder A 

PROVIDER: S-EPMC6120476 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature