Pathway selection by pulsed field gradients

Abstract

A method for pathway selection in a multiple spin-echo pulse sequence applying crusher gradients before and after each π pulse, to dephase unwanted pathways, is described. This method selects the only pathway that would contribute to the measurable signal if the π pulses were perfect (1,-1,1,-1,...). Good pathway selection is essential in pulse programming, especially when the CPMG condition is not met. An interactive applet was also developed to deal with these calculations. © 2002 Wiley-Liss, Inc.