Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate a hiatal hernia with an air - fluid level visualized in the mediastinum , unchanged . There is no focal consolidation , pleural effusion , or pneumothorax . There is a hazy opacity adjacent to the hiatal hernia which may represent adjacent atelectasis . There are mild vascular calcifications of the aortic arch .
    OUTPUT:
    
Hiatal hernia . No acute cardiopulmonary process .