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.
Butterfly time penalty analysis. a: Original phase-encode gradient. b: Butterfly modified phase-encode gradient. For equivalent acquisitions, the total gradient areas in (a) and (b) must be equal. The gradients are designed such that the light-yellow shaded regions have the same areas and the dark-gray shaded regions have the same areas.
