My Ultrasound Says The Gallbladder Is Normal In Size And

my ultrasound says the gallbladder is normal in size and wall thickness. it measures 9.6 x 2.6cm. multiple intraluminalhyperechoic foci are seen, ranging from 0.4 to 0.8cm the visualized common bile duct is not dilated measuring 0.3cm the perichole ystic region is intact.
Impression : cholecystolithiases non dilated biliary tree

what does it mean?
thank you!