FAIR excluding radiation damping (FAIRER)

Abstract

It is shown that the flow‐sensitive alternating inversion recov ery (FAIR) technique is complicated by the effect of radiation damping, leading to problems in calibrating this method on phantoms and to inaccuracies in measured flows. A modified scheme called FAIRER (FAIR excluding radiation damping) is proposed, which suppresses the damping effects by employ ing very weak magnetic field gradients (0.06 G/cm) during the inversion recovery, spin‐echo, and predelay periods. Results on phantoms and in vivo on cat brain are presented that demonstrate that FAIRER effectively solves these problems.