Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top normal . The hilar and mediastinal contours are within normal limits . Diffuse reticular parenchymal opacities are again seen , demonstrating slightly increased nodularity since ___ , which may represent sarcoidosis . No focal consolidation , pleural effusion , or pneumothorax is seen .
    OUTPUT:
    
No acute intrathoracic process . Chronic reticulonodular interstitial opacities that may reflect sarcoidosis .