A.正常膽總管直徑<5mm,>8mm為擴張 B.正常膽總管直徑<8mm,>10mm為擴張 C.正常膽總管直徑<10mm,>15mm為擴張 D.正常膽總管直徑<15mm,>20mm為擴張 E.以上都不對
A.<1mm B.<2mm C.<3mm D.<4mm E.<5mm
A.6mm B.8mm C.10mm D.12mm E.14mm