What are six ultrasound findings in acute cholecystitis?

1. Focal gallbladder tenderness
2. Wall thickening (>3 mm)
3. Impacted stone in gallbladder neck
4. Pericholecystic fkuid collection
5. Increased gallbladder size (i.e., AP diameter of more than 4 cm)
6. Intraluminal complex echoes