A.臥位腹平片 B.立位腹平片 C.胸片 D.腹部CT E.腹部MRI
A.1:1 B.10:1 C.20:1 D.50:1 E.200:1
A.1~1.3:1B.1~1.5:1C.1.5~2.0:1D.1.5~2.5:1E.1.8~2.0:1