6Baron RL,Stanley RJ,Lee JK,et al.Computed tomographic features of biliary obstruction[J].AJR,1983,140(6):1173-1178.
7Neitlich JD,Topazian M,Smith RC,et al.Detection of choledocholithiasis:comparison of unenhanced helical CT and endoscopic retrograde cholangiopancreatography[J].Radiology,1997,203(6):753-757.
8Zeiberg AS,Silverman PM,Sessions RB,et al.Helical (spiral) CT of the upper airway with three-dimensional imaging:technique and clinical assessment[J].AJR,1996,166(2):293-299.
9Baron RL.Diagnosing choledocholithiasis:how far can we push helical CT[J]? Radiology,1997,203(3):601-603.
10Mitchell SE,Clark RA.A comparison of computed tomography and sonography in choledocholithiasis[J].AJR,1984,142(4):729-733.
