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.
High‐frequency ultrasound images of the left nasolabial fold in one representative subject over the whole study period (D0 to D540) after one single injection of AF Lips at D0. The color scale of echogenicity (from hyperechogenic to hypoechogenic) ranges from white‐yellow–red–green–blue–black. The echogenic density of ultrasound is based on the quantity of collagen. d, dermis; e, epidermis; F, Film; G, gel; s, subcutaneous adipose tissue; W, water.
