Practical approach to imaging diagnosis of biliary atresia, Part 1: prenatal ultrasound and magnetic resonance imaging, and postnatal ultrasound

This systematic review provides a practical imaging approach to diagnosing biliary atresia, focusing on prenatal and postnatal ultrasound features. Key diagnostic signs include triangular cord sign, abnormal gallbladder, and prenatal non-visualization of the gallbladder, though normal imaging does not exclude the diagnosis.