The detective rates for tumors more than 2cm in diameter were 100% by all imaging methods except for angiography. The tumor detecting rates of EUS, OUS and ERCP were more than 90%(32/34),while of B us, CDI, CT and MRI were about 80%(27/34).

• 除Angio的诊断符合率不足50%25外，B?us与CDI，CT，MRI的诊断符合率相当，约80%25（27/34），EUS，OUS，ERCP的诊断率均达90%25（32/34）以上，检出全部直径大于和等于2cm的癌灶。