Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . A moderate to large hiatal hernia is re - demonstrated . The mediastinal and hilar contours otherwise are unchanged . Pulmonary vascularity is normal . Subtle branching opacities in the mid lung fields bilaterally may correlate to the clusters of peribronchial tiny opacities seen on recent CT . No pleural effusion , focal consolidation or pneumothorax is visualized . No acute osseous abnormalities are identified .
    OUTPUT:
    
1 . Subtle branching opacities within the mid lung fields may correlate with the areas suspicious for chronic atypical mycobacterial infection or aspiration , as described on the prior Chest CT . No new focal consolidation is otherwise noted . 2 . Moderate to large hiatal hernia .