Table 2. Ultrasonographic gallbladder scoring by Cook et al. (2016).

Grade	Description
1	Bile uniformly hypoechoic; no sediment.
2	1%–25% of bile hyperechoic; gravity dependent
3	26%–50% of bile hyperechoic; gravity dependent
4	51%–75% of bile hyperechoic; gravity dependent
5	>75% of bile hyperechoic; gravity dependent