Fast T-1 mapping on a whole-body scanner

A method for the fast acquisition of quantitative T-1 maps is presented. It is based on the acquisition of a series of snapshot fast low-angle shot (F LASH) images after inversion of the magnetization, A drawback of this metho d is the necessity for a sufficiently long relaxation delay before each inv ersion pulse, leading to long experimental times if averaging or segmentati on is required. Thus implementation of this method on a whole-body scanner is problematic, as the longer gradient rise times provide prolonged repetit ion times, which makes segmentation indispensable to provide a sufficient t emporal resolution. We present a modification of the method that allows for reduction in the intermediate relaxation delays and thus for considerably reduced experimental durations. Magn Reson Med 42:206-209, 1999. (C) 1999 W iley-Liss, Inc.