Meeting Banner
Abstract #4343

PNS Safety of the Composite Gradient System

K Craig Goodrich1, Seong-Eun Kim1, Joshua D. Kaggie1, J. Rock Hadley1, William B. Handler2, Blaine A. Chronik3, Dennis L. Parker1

1UCAIR, University of Utah, Salt Lake City, UT, United States; 2Physics and Astronomy, Univ of Western Ontario, London, Ontario, Canada; 3Physics and Astronomy, Western University, London, Ontario, Canada

This work was done to establish PNS limits for simultaneous operation of a 3 axis head/neck gradient insert and standard gradient system (composite mode operation). PNS thresholds were measured for each gradient system as well as combined operation for each axis separately and combined. Experimental results suggest that body and insert gradient thresholds are independent of each other, allowing for increased combined gradient field strength and slew rates in composite mode until either constituent threshold is reached. These results show a definite safety advantage for composite gradient mode operation allowing larger gradients and slew rates.

Abstract PDF

Keywords

abstracts achieved allowing amplifiers amplitude annual anyone apply approval assessment astronomy audience axes axis body book capable care channels city close coil combined component components composite computer computers concepts configuration configurations configured consent consisted consistently constituent construction contribution controlling creating definite designed dominant double edge either element equal equals error essentially establish extra field five foundation gradient gradients handler head health independent indicating individual induced informed insert inside iris lake larger limiting limits linear lists location locations magnitude master match measured measures medical meeting mode modes nearly neck nerve novel occurred operating operation parker part performance physics plus poke portion positioned positive previously pulse pulses radially random reach reached recorded referred relations repeated reported reproducibility respectively rock safety salt scanner seem sensation separated shoulders simultaneous slave slew stimulated stimulation strength studies supported synchronously system systems table target threshold thresholds together torso touching triggers triple typically underwent univ volunteer volunteers western whole