Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
Echogenicity profiles with the CLC intensity modulation profile superimposed. Top: At a point at the skin interface (black circle in Fig. 4). Middle: At the target point. Bottom: At a point 2 mm ventral to the target (green circle in Fig. 4).
