Figure 2.
In situ ultrasound beam profiles of the 1 MHz and 7.5 MHz transducers.
Notes: The –3 dB contours of the transmit field (blue) and receive sensitivity (orange) are depicted, along with the anticipated location of the artery (red, box).
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.