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.
Single-frequency two-channel 7 T phantom experiment. Measured patterns from (a) 5-kT-point 180° refocusing pulses and (b) 5-spoke 180° inversion pulses. The patterns are normalized to the maximum amplitude across all three, and the corresponding standard deviations are reported in the corners.
