Objective To probe the ultrasonographic characteristics of the carcinoma in pancreatic head(CHP) and in ampulla of Vater(CAV) so as to improve the ultrasonic differential diagnosis rate.

• 目的探讨胰头癌与壶腹癌的超声声像图特征,以提高胰头癌及壶腹癌的超声鉴别诊断符合率。