超声检查可发现 X 线检查难以观察到的少量积液（＜100 mL）并可估测积液量、确定积液部位、协助穿刺定位，多用于引导有创胸膜诊断手术。此外，超声检查还可探测积液深度、黏稠度、内容物和分隔情况，评估胸膜和膈肌厚度以及是否发生胸膜转移。

Background: Ascites and pleural effusion are well recognized complications of pancreatic diseases. Drug therapy of these is limited by high cost, prolonged hospitalization and failure rates ...

In Oct. 2012, follow-up chest x-ray and CT revealed "bilateral pleural effusion with two nodules in the upper and lower lobes of the right lung." Clinicians made a diagnosis of metastatic breast ...