Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a heart which is mildly enlarged . Persistent opacity in the right lung base is again likely due to a chronic large hiatal hernia , likely with adjacent atelectasis . No definite focal consolidation , pleural effusion , or pneumothorax is visualized .
    OUTPUT:
    
No acute cardiopulmonary process . Large hiatal hernia .