A.D/B轉換 B.D/C轉換 C.D/A轉換 D.B/D轉換 E.C/D轉換
A.0.5mm B.1mm C.1.5mm D.2mm E.2.5mm
A.仰臥左前斜位掃描 B.適量高密度胃腸道對比劑 C.適量陰性胃腸道對比劑 D.增強掃描 E.掃描前用鹽酸山莨菪堿