Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Velocity Selective Inversion pulse described by Qin et al. A 180 degree hard pulse is broken into nine 20 degree segments. Additional 180’s are interspersed to refocus off-resonance effects and correct for B1 inhomogeneity. These follow an MLEV phase pattern. In the control case, the velocity selective gradients are always positive (shown in grey).
