A.胰腺彌漫性腫大,輪廓清晰,實(shí)質(zhì)回聲增強(qiáng) B.胰腺輕度增大,實(shí)質(zhì)回聲增強(qiáng),分布不均,胰管內(nèi)可見強(qiáng)回聲,后方伴聲影 C.胰腺彌漫性腫大,輪廓不清,實(shí)質(zhì)回聲減低 D.胰腺局部或周圍可見一無回聲區(qū),邊界整齊,呈圓形或分葉狀 E.胰腺局限性增大,見低回聲團(tuán)塊,邊界不清,向周圍組織浸潤