Are Gallstones Hyperechoic?

Are Gallstones Hyperechoic? Are gallstones hyperechoic? Gallstones on ultrasound have the appearance of hyperechoic structures within the gallbladder with distal acoustic shadowing. Sludge in gallbladder may also be seen, with an appearance of hyperechoic layering within the gallbladder. Sludge, unlike stones, does not cast acoustic shadowing. Are stones hyperechoic? Ultrasound findings include the following: Cholelithiasis: