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.
Ultrasound Doppler examinations of ocular vessels and the measurement process of major vascular parameters. The parameters are as follows: peak systolic velocity (PSV is shown as Vp), end-diastolic velocity (EDV), resistance indices (RI), and pulsatility index (PI). The images demonstrate measurements of the ophthalmic artery (OA; A), central retinal artery (CRA; B), and posterior ciliary artery (PCA; C).
