Is “gallbladder length-to-width ratio” useful in diagnosing biliary atresia?

Study validates gallbladder length-to-width ratio as an objective ultrasound parameter for biliary atresia screening in infants with conjugated hyperbilirubinemia. Combined assessment of gallbladder LTWR >4.1, portal vein diameter >4.4mm, and hepatic artery diameter >1.2mm achieves 98% specificity for BA diagnosis.