<prompt> A patient has a surgical cause of obstructive jaundice. USG can tell all of the following exceptNumber of stones in CBDPeritoneal depositsSize of liverAscites  <response>: Ans. b Peritoneal depositsRef: Bailey Love 26th ed. 1100Advantages of ULTRASOUND in obstructive jaundiceLimitations of ULTRASOUND in obstructive jaundiceUltrasonography US is the least expensive, safest, and most sensitive technique for visualizing the biliary system, particularly the gallbladderUS is considered somewhat limited in its ability to detect partial obstructionCurrent accuracy is close to 95. US is the procedure of choice for the initial evaluation of cholestasis and for helping differentiate extrahepatic from intrahepatic causesUS is not as useful for CBD stones bowel gas may obscure visualization of the CBD. The cystic duct is also poorly imagedVisualization of the pancreas, kidney, and blood vessels is also possible.In addition, it is less useful diagnostically in individuals who are obese 