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.
Nonlinear detection techniques of microbubbles. (A) Harmonic imaging. (B) Pulse inversion (PI). (C) Amplitude modulation (AM). Here is an example that the amplitude of the first transmitted pulse is twice the amplitude of the second transmitted pulse. (D) Contrast pulse sequence (CPS). Adapted from Caskey et al. [4] with permission, Copyright © 2011 Elsevier B.V.
