The accuracy of CT predicting of the level and cau se of biliary obstruction was the same as that of DC However,CT can correctly evaluate the resectability of malignant obstruction.

• CT对阻塞的定位、定性有与直接胆管造影同样高的准确性，但CT还能对恶性胆道阻塞的手术切除可行性作出相当可靠的估价。