Abstract
Over the past two decades, ultrasonography and computed tomography (CT) have emerged as the principal imaging methods for diagnostic examination of the liver and biliary tree. The other noninvasive imaging techniques, including magnetic resonance imaging (MRI), oral cholecystography, and nuclear scintigraphy, are used for difficult diagnostic problems, and invasive studies, such as angiography and direct cholangiography (transhepatic or retrograde), are increasingly used for treatment.Recent Technical AdvancesAdvances in electronics have improved diagnostic imaging. Perhaps the most important advance in liver imaging has been the introduction of helical or spiral CT scanning.1 With conventional CT scanners, the CT table remains . . .