Meeting Banner
Abstract #0131

A Separated Transmit-Only, Receive-Only Array for Body Imaging at 7T with Automated Tuning and Matching Capabilities

Carl Snyder1, Lance DelaBarre1, Aaron T. Hess2, Chris Rodgers2, Mattew Robson2, University of Minnesota University of Minnesota Vaughan1

1University of Minnesota, Minneapolis, MN, United States; 2University of Oxford, Oxford, United Kingdom

Describe below is a novel 16-channel TEM transmit-Only array used with a 32-channel receive-only loop array for body imaging at 7T. Additionally, and more importantly, we describe an electromechanical method for automating the tuning and matching process for the 16 transmit elements using piezoelectric actuators. Automation of the tuning and matching procedure took, on average 50s and with an average S11 greater than 20dB. Following tuning and matching the array successfully imaged the human torso.

Keywords

active actuation actuator actuators additionally advancements amplifier analog array arrays automate automated back basic become behind believe body breath came capacitance capacitive capacitors channel channels clinical closer coefficient coil coils combination combined completely components composed conjunction consisted consisting control controller controlling correct coupled coupler custom cylindrical decoupled decoupling decrease descent described design designed detuning diastole digital digitizes diode directional drive duty electromechanical every expiration feedback fidelity fitted forward frequency generator gradient greater greedy half head holds home human imagining importantly increasing independently individual inspiration isolators lance linked liver loaded local logic loop magnitude match matched matching measures mechanically moved multiplex necessary neighboring networks opened outputs oxford pair paradigm patent performance piezoelectric position power preamp prior procedure process pseudo pulse pulsed receive reduce reduction reflecting reflection requisite resolution samples schematic separated setup short since slices speed step studies surface table technology took torso transmit transmitter tune tuned tuning turn voltages volume waveforms