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.
(A) Example ultrasound images of the facet joint regions in the transverse plane in a human subject are shown. Arrows point to the facet joints. (B) Example ultrasound images of the facet joint regions in the transverse plane in a phantom model are shown. Arrows point to the facet joints.
