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.
Optical resolution and acoustic focal zone. (a) Optically defined lateral resolution quantified using a resolution target. (b) Acoustic focal zone within the horizontal plane delineated by 2-D optical scanning of a black tape. (c) Acoustic focal diameters along the - and -axis quantified by the full-width at half-maximum (FWHM) values of the Gaussian-fitted cross-sectional profiles.
