Abstract
In the field of the biliary disease, ultrasound examination (US) is useful not only to pick up the lesions, but also to make a further diagnosis. In this lecture, the findings and readings as for gallstones, gallbladder polyps, adenomyomatosis, gallbladder cancer were described. Normal gallbladder wall is visualized as three layers (high-, low-, high-echo) by US. The first high echo layer shows marginal echo, the second shows mucosa, muscle layer, and superficial part of subserosal layer, and the third shows subserosal layer, respectively. To make a further diagnosis, understanding which layer of the gallbladder wall is mainly occupied by the lesion is mostly needed.
